ULTRASONIC AND ELECTROSURGICAL DEVICES
Disclosed are ultrasonic and electrosurgical devices. The disclosed embodiments include a surgical instrument comprising an ultrasonic waveguide. The ultrasonic waveguide may comprise a proximal end and a distal end, wherein the proximal end is configured to couple to an ultrasonic transducer. The surgical instrument may further comprise a tube, and end effector, and a shaft assembly. The tube may define a lumen, wherein the waveguide is located within the lumen. The end effector may be coupled to the distal end of the waveguide and comprise an ultrasonic blade and a clamp arm comprising a movable jaw member. The shaft assembly may be configured to counteract deflection of the blade.
This application is a divisional application claiming priority under 35 U.S.C. §121 to U.S. patent application Ser. No. 13/843,295, entitled ULTRASONIC AND ELECTROSURGICAL DEVICES, filed Mar. 15, 2013, now U.S. Patent Application Publication No. US 2014/0135804, which claims the benefit of U.S. Provisional Patent Application Ser. No. 61/726,890, filed Nov. 15, 2012, entitled ULTRASONIC AND ELECTROSURGICAL DEVICES, the disclosures of which are hereby incorporated by reference in their entirety.
INTRODUCTIONThe present disclosure is related generally to ultrasonic and electrical surgical devices. More particularly, the present disclosure is related to various blade features for ultrasonic blades to improve tissue grasping, various seals and fluid egress features to prevent build up and accumulation of tissue and other bodily materials encountered during surgery on the distal portion of the tube(s) and the nearby portion of the blade of ultrasonic surgical devices, clamp closure mechanisms for ultrasonic end effectors to provide uniform clamp force, rotation mechanisms for ultrasonic transducers and devices, and combined electrosurgical and ultrasonic devices to provide tissue cutting and spot coagulation.
Ultrasonic surgical devices, such as ultrasonic scalpels, are used in many applications in surgical procedures by virtue of their unique performance characteristics. Depending upon specific device configurations and operational parameters, ultrasonic surgical devices can provide substantially simultaneous transection of tissue and hemostasis by coagulation, desirably minimizing patient trauma. An ultrasonic surgical device comprises a proximally-positioned ultrasonic transducer and an instrument coupled to the ultrasonic transducer having a distally-mounted end effector comprising an ultrasonic blade to cut and seal tissue. The end effector is typically coupled either to a handle and/or a robotic surgical implement via a shaft. The blade is acoustically coupled to the transducer via a waveguide extending through the shaft. Ultrasonic surgical devices of this nature can be configured for open surgical use, laparoscopic, or endoscopic surgical procedures including robotic-assisted procedures.
Ultrasonic energy cuts and coagulates tissue using temperatures lower than those used in electrosurgical procedures. Vibrating at high frequencies (e.g., 55,500 times per second), the ultrasonic blade denatures protein in the tissue to form a sticky coagulum. Pressure exerted on tissue by the blade surface in combination with a clamping mechanism collapses blood vessels and allows the coagulum to form a hemostatic seal. A surgeon can control the cutting speed and coagulation by the force applied to the tissue by the end effector, the time over which the force is applied and the selected excursion level of the end effector.
Also used in many surgical applications are electrosurgical devices. Electrosurgical devices apply electrical energy to tissue in order to treat tissue. An electrosurgical device may comprise an instrument having a distally-mounted end effector comprising one or more electrodes. The end effector can be positioned against tissue such that electrical current is introduced into the tissue. Electrosurgical devices can be configured for bipolar or monopolar operation. During bipolar operation, current is introduced into and returned from the tissue by active and return electrodes, respectively, of the end effector. During monopolar operation, current is introduced into the tissue by an active electrode of the end effector and returned through a return electrode (e.g., a grounding pad) separately located on a patient's body. Heat generated by the current flow through the tissue may form haemostatic seals within the tissue and/or between tissues and thus may be particularly useful for sealing blood vessels, for example. The end effector of an electrosurgical device sometimes also comprises a cutting member that is movable relative to the tissue and the electrodes to transect the tissue.
Electrical energy applied by an electrosurgical device can be transmitted to the instrument by a generator. The electrical energy may be in the form of radio frequency (“RF”) energy. RF energy is a form of electrical energy that may be in the frequency range of 300 kHz to 1 MHz. During its operation, an electrosurgical device can transmit low frequency RF energy through tissue, which causes ionic agitation, or friction, in effect resistive heating, thereby increasing the temperature of the tissue. Because a sharp boundary may be created between the affected tissue and the surrounding tissue, surgeons can operate with a high level of precision and control, without sacrificing adjacent tissues or critical structures. The low operating temperatures of RF energy may be useful for removing, shrinking, or sculpting soft tissue while simultaneously sealing blood vessels. RF energy may work particularly well on connective tissue, which is primarily comprised of collagen and shrinks when contacted by heat.
SUMMARYIn one embodiment, an ultrasonic surgical instrument comprises a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to an ultrasonic transducer; an end effector coupled to the distal end of the waveguide; a tube comprising a lumen, wherein the waveguide is located within the lumen; a clamp arm pivotably connected to the tube; and a tissue accumulation impedance mechanism configured to prevent tissue from accumulating in the lumen.
In another embodiment of the ultrasonic surgical instrument, the tissue accumulation impedance mechanism comprises a boot barrier configured to create a seal between the tube and the end effector.
In another embodiment of the ultrasonic surgical instrument, the boot barrier is sealed to the tube using one or more retention features.
In another embodiment of the ultrasonic surgical instrument, the boot barrier comprises a cavity.
In another embodiment of the ultrasonic surgical instrument, the cavity is rounded to allow fluid to flow out of the cavity.
In another embodiment of the ultrasonic surgical instrument, the boot barrier comprises a plurality of contact points with the blade.
In another embodiment of the ultrasonic surgical instrument, the tissue accumulation impedance mechanism comprises one or more apertures in the tube.
In another embodiment of the ultrasonic surgical instrument, the apertures comprise one or more windows.
In another embodiment of the ultrasonic surgical instrument the apertures comprise one or more holes.
In another embodiment of the ultrasonic surgical instrument, the distal portion comprises a hemispherical cross section.
In another embodiment of the ultrasonic surgical instrument, the tube comprises one or more ribs formed on an inner side of the tube.
In another embodiment of the ultrasonic surgical instrument, the tissue accumulation impedance mechanism comprises a pump configured to provide a positive pressure flow between the blade and the tube, wherein the positive pressure flow prevents tissue ingress into the lumen.
In another embodiment of the ultrasonic surgical instrument, the pump or the outlet of the pump is located distally to a distal-most overmolded seal located within the lumen.
In another embodiment of the ultrasonic surgical instrument the tissue accumulation impedance mechanism comprises a slidable tube disposed within the lumen, the slidable tube slidable from a first position to a second position, wherein in the first position the slidable tube is disposed over the blade, and the second position the blade is exposed.
In one embodiment, an ultrasonic surgical instrument comprises a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to an ultrasonic transducer; an end effector coupled to the distal end of the waveguide, the end effector comprising at least one tissue retention feature; a clamp arm operatively coupled to the end effector.
In another embodiment of the ultrasonic surgical instrument, the at least one tissue retention feature comprises one or more indentations/grooves/notches/texture formed in the end effector.
In another embodiment of the ultrasonic surgical instrument, the one or more indentations comprise triangular teeth.
In another embodiment of the ultrasonic surgical instrument, the one or more indentations comprise holes.
In another embodiment of the ultrasonic surgical instrument, the one or more indentations comprise horizontal trenches.
In another embodiment of the ultrasonic surgical instrument, the at least on tissue retention feature comprises one or more projections from the end effector.
In another embodiment of the ultrasonic surgical instrument, the one or more projections comprise triangular teeth.
In another embodiment of the ultrasonic surgical instrument, the one or more projections comprise blocks.
In another embodiment of the ultrasonic surgical instrument, the one or more projections comprise horizontal bumps.
In another embodiment of the ultrasonic surgical instrument, the one or more projections comprise circular bumps.
In another embodiment of the ultrasonic surgical instrument, the at least one tissue retention feature is disposed over an entire length of the blade.
In another embodiment of the ultrasonic surgical instrument, the at least one tissue retention feature is disposed over a discrete section of the blade.
In one embodiment, an ultrasonic surgical instrument comprises a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to an ultrasonic transducer; an end effector operatively coupled to the distal end of the waveguide guide; a rotation shroud configured to rotate the waveguide; and a rotation stop mechanism coupled to the rotation shroud prevent rotation of the rotation knob beyond a predetermined rotation.
In another embodiment of the ultrasonic surgical instrument, the shroud comprises at least one channel; at least one boss, the at least one boss located within the at least one channel, wherein the at least one boss has a predetermined lateral movement limit, wherein when the at least one boss reaches the predetermined lateral movement limit, the at least one boss prevents further rotation of the rotation knob.
In another embodiment of the ultrasonic surgical instrument, the rotation stop comprises a gate comprising a first wing and a second wing, wherein the first and second wings are disposed at an angle, wherein the gate is disposed within the shroud and the gate allows a predetermined angle of rotation of the shroud.
In one embodiment, an ultrasonic surgical instrument comprises a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to an ultrasonic transducer; an end effector coupled to the distal end of the waveguide; a clamp arm operatively coupled to the end effector; a tube disposed over the waveguide, wherein the tube comprises a counter deflection element, wherein the counter deflection element is configured to allow deflection of the blade, wherein the deflection of the blade counteracts a force placed on the blade by the clamp arm in a clamped position.
In one embodiment, a surgical instrument comprises a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to a signal source, the signal source configured to provide an ultrasonic signal and an electrosurgical signal; an end effector coupled to the waveguide; a clamp arm operatively coupled to the end effector; and a sealing button, wherein the sealing button causes the surgical instrument to deliver the electrosurgical signal to the end effector and/or the clamp arm for a first period and the sealing button causes the surgical instrument to deliver the ultrasonic signal to the blade for a second period, wherein the second period is subsequent to the first period.
In another embodiment of the surgical instrument, the sealing button causes the surgical instrument to deliver the ultrasonic signal to the end effector prior to transmitting the electrosurgical signal to the end effector and/or clamp arm.
In another embodiment of the surgical instrument, the sealing button causes the surgical instrument to only deliver the ultrasonic signal to the end effector resulting in haemostatic transection of tissue. A separate spot coagulation button is provided on the handle. When the spot coagulation button is depressed, an electrosurgical signal is provided to either the end effector or the clamp arm or both to effect spot coagulation of tissue.
In another embodiment of the surgical instrument, wherein the electrosurgical signal is a monopolar RF signal.
In another embodiment of the surgical instrument, wherein the electrosurgical signal is a bipolar RF signal.
In one embodiment, a surgical instrument comprises a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to an ultrasonic transducer; an end effector coupled to the distal end of the waveguide; a tube disposed over the waveguide; a cam surface formed on or in an outer surface of the tube; and a clamp arm, wherein the clamp arm is operatively coupled to the cam surface.
In another embodiment of the surgical instrument, a pivot pin is located within a hole defined by the end effector, the pivot pin operatively coupled to the clamp arm, wherein the clamp arm pivots about the pivot pin.
In another embodiment of the surgical instrument, the pivot pin is located at the distal most node of the waveguide.
In another embodiment of the surgical instrument, the tube is actuatable and the clamp arm is cammed open and closed against the end effector through relative motion between the tube and the end effector.
In one embodiment, a surgical instrument comprises a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to an ultrasonic transducer; an end effector coupled to the distal end of the waveguide, the end effector defining a pin hole; a rigid pin disposed within the pin hole; a clamp arm operatively connected to the outer tube; and a four-bar linkage; wherein the four-bar linkage is operatively coupled to the clamp arm and the rigid pin, wherein the four-bar linkage is actuatable via end effector translation to move the clamp arm to a clamped position.
In another embodiment of the surgical instrument, an outer tube is coupled to the four-bar linkage and the outer-tube actuates the four-bar linkage from a first position to a second position.
In one embodiment, an ultrasonic surgical instrument comprises a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to an ultrasonic transducer; an end effector coupled to the distal end of the waveguide, wherein the end effector is partially coated with thermally and electrically insulative material such that the distal end of the end effector comprises one or more exposed sections.
In another embodiment of the ultrasonic surgical instrument end effector, the one or more exposed areas are symmetrical.
In another embodiment of the ultrasonic surgical instrument end effector, the one or more exposed areas are asymmetrical.
In another embodiment of the ultrasonic surgical instrument end effector, the one or more exposed sections are separated by one or more coated sections.
In one embodiment, an ultrasonic surgical instrument comprises a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to an ultrasonic transducer; an end effector coupled to the distal end of the waveguide, and a clamp arm is operatively connected to the end effector, wherein the clamp arm is partially coated with thermally and electrically insulative material such that the distal end of the clamp arm comprises one or more exposed sections.
In another embodiment of the ultrasonic surgical instrument clamp arm, the one or more exposed areas are symmetrical.
In another embodiment of the ultrasonic surgical instrument clamp arm, the one or more exposed areas are asymmetrical.
In another embodiment of the ultrasonic surgical instrument clamp arm, the one or more exposed sections are separated by one or more coated sections.
In one embodiment, an ultrasonic surgical instrument comprises a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to an ultrasonic transducer; an end effector coupled to the distal end of the waveguide, and a clamp arm is operatively connected to the end effector, wherein the end effector and the clamp arm are partially coated with thermally and electrically insulative material such that the distal end of the end effector and clamp arm comprise one or more exposed sections.
In another embodiment of the ultrasonic surgical instrument, the one or more exposed areas are symmetrical.
In another embodiment of the ultrasonic surgical instrument, the one or more exposed areas are asymmetrical.
In another embodiment of the ultrasonic surgical instrument, the one or more exposed sections are separated by one or more coated sections.
The foregoing is a summary and thus may contain simplifications, generalizations, inclusions, and/or omissions of detail; consequently, those skilled in the art will appreciate that the summary is illustrative only and is NOT intended to be in any way limiting. Other aspects, features, and advantages of the devices and/or processes and/or other subject matter described herein will become apparent in the teachings set forth herein.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
The novel features of the embodiments described herein are set forth with particularity in the appended claims. The embodiments, however, both as to organization and methods of operation may be better understood by reference to the following description, taken in conjunction with the accompanying drawings as follows.
Before explaining the various embodiments of the ultrasonic and electrical surgical devices in detail, it should be noted that the various embodiments disclosed herein are not limited in their application or use to the details of construction and arrangement of parts illustrated in the accompanying drawings and description. Rather, the disclosed embodiments are may be positioned or incorporated in other embodiments, variations and modifications thereof, and may be practiced or carried out in various ways. Accordingly, embodiments of the ultrasonic and electrical surgical devices disclosed herein are illustrative in nature and are not meant to limit the scope or application thereof. Furthermore, unless otherwise indicated, the terms and expressions employed herein have been chosen for the purpose of describing the embodiments for the convenience of the reader and are not to limit the scope thereof. In addition, it should be understood that any one or more of the disclosed embodiments, expressions of embodiments, and/or examples thereof, can be combined with any one or more of the other disclosed embodiments, expressions of embodiments, and/or examples thereof, without limitation.
In the following description, like reference characters designate like or corresponding parts throughout the several views. Also, in the following description, it is to be understood that terms such as front, back, inside, outside, top, bottom and the like are words of convenience and are not to be construed as limiting terms. Terminology used herein is not meant to be limiting insofar as devices described herein, or portions thereof, may be attached or utilized in other orientations. The various embodiments will be described in more detail with reference to the drawings.
In various embodiments, the present disclosure is related to various embodiments of ultrasonic blades comprising various grasping features. Conventional ultrasonic blades lack grasping features. Such grasping features may be desirable on a gripping surface of an ultrasonic blade to provide additional gripping and to prevent tissue milking during grasping and treatment, which in some cases may improve hemostasis. Tissue milking occurs when a tissue section slides, or milks, out of the jaws of a surgical device during treatment. The present disclosure provides various blade modification features to prevent tissue milking, as well as provide better grasping forces.
In various embodiments, the present disclosure is related to various embodiments of devices configured to prevent ingress of surgical matter, e.g., fluid and tissue, in the space between an ultrasonic blade and an inner or outer tube distal of the distal seal. Two main categories of embodiments are described. First, a pressure or energy source attached to the blade-tube subassembly prevents fluid or tissue ingress into the space between the blade and the inner tube. Second, a flexible membrane(s) attached to either the blade or the inner tube prevents fluid or tissue ingress.
In various embodiments, the present disclosure also is related to various embodiments of alternate closure mechanisms for ultrasonic devices. Present ultrasonic devices utilize a tube-in-tube (TnT) closure mechanism to enable closure of the clamp arm, referred to herein as a movable jaw member, against an active length of the ultrasonic blade. The present embodiments of alternate closure mechanisms for ultrasonic devices may yield several advantages. For example, there may be differences among the drag force of actuating the inner tube against the outer tube resulting in variation in device clamp force. Additionally, the pivot location of the clamp arm on the outer tube causes a sharp angular closure, and results in a non-uniform closure profile. Furthermore, present device mechanism may be sensitive to variation in components, as the stackup links the inner and outer tube at the location of the insulated pin, which currently resides near the proximal end of the tube assembly.
In various embodiments, the present disclosure also is related to various embodiments of shaft assembly/transducer rotation limiters to limit the rotation of the shaft and ultrasonic transducer.
In various embodiments, the present disclosure also is related to various embodiments of shaft/ultrasonic transducer rotation systems to provide unlimited continuous rotation of an ultrasonic device. In various embodiments, tactile feedback may be provided to the user before a hard stop is hit.
In various embodiments, the present disclosure also is related to various embodiments of an integrated RF/ultrasonic instrument electrically connected to provide RF spot coagulation energy for pre- or post-ultrasonic treatment of tissues with an ultrasonic/RF generator. The integrated ultrasonic instrument enables the touch up of diffuse bleeding (capillary bleeding, cut site oozing) or pre-treatment of tissue without the need for coupling pressure and improves the coupling pressure needed for ultrasonic instruments to couple the blade to tissue such that friction-based tissue effect is effective. The integrated ultrasonic instrument reduces (1) difficulty in applying enough pressure to generate haemostatic effect in loosely supported (i.e., un-clamped) tissue or (2) coupling pressure that generates too much tissue disruption that, in many cases, makes the diffuse bleeding worse. In one embodiment, a four-lead jack connector is mated with a slidable female mating plug to electrically isolate a secondary RF generator from the ultrasonic transducer when switching between RF energy and ultrasonic energy.
In various embodiments, the present disclosure is also directed to ultrasonic blades comprising heat shields. The heat shields may be fixed, translatable or rotatable. The heat shield also may be used to conduct RF energy to target tissue.
In various embodiments, the present disclosure also is related to coated ultrasonic/RF blades. Ultrasonic blades are coated with an electrically insulative material to provide thermal insulation at the tissue contact area to minimize adhesion of tissue to the blade. Conventional ultrasonic devices utilize one mode of treatment, which limits versatility. For example, conventional ultrasonic devices may be used for blood vessel sealing and transecting tissue. Bipolar or monopolar RF may offer added benefits such as a method for spot coagulation and pretreatment of tissue. Incorporating ultrasonic and RF may provide versatility and increase effectiveness. However, conventional ultrasonic devices utilize coatings to provide reduced friction and thermal insulation at the distal end of the blade. These coatings are electrically insulative, and therefore limit current flow thus decreasing RF effectiveness. Additionally, current density may influence effectiveness. In order to incorporate both modes into one device, a masking or selective coating removal process may be required. Creating an exposed area on the surface of the blade may provide a suitable path for current flow. It is conceivable that the same principles may be applied to the clamping member as well.
General Surgical Instrument OverviewBefore launching into a description of various embodiments, the present disclosures turns to the description of
In various embodiments, the generator 20 comprises several functional elements, such as modules and/or blocks. Different functional elements or modules may be configured for driving different kinds of surgical devices. For example, an ultrasonic generator module 21 may drive an ultrasonic device, such as the ultrasonic surgical instrument 10. In some example embodiments, the generator 20 also comprises an electrosurgery/RF generator module 23 for driving an electrosurgical device (or an electrosurgical embodiment of the ultrasonic surgical instrument 10). In various embodiments, the generator 20 may be formed integrally within the handle assembly 12. In such implementations, a battery would be co-located within the handle assembly 12 to act as the energy source.
In some embodiments, the electrosurgery/RF generator module 23 may be configured to generate a therapeutic and/or a sub-therapeutic energy level. In the example embodiment illustrated in
In one embodiment, the electrosurgical/RF generator module 23 may be implemented as an electrosurgery unit (ESU) capable of supplying power sufficient to perform bipolar electrosurgery using RF energy. In one embodiment, the ESU can be a bipolar ERBE ICC 350 sold by ERBE USA, Inc. of Marietta, Ga. In bipolar electrosurgery applications, as previously discussed, a surgical instrument having an active electrode and a return electrode can be utilized, wherein the active electrode and the return electrode can be positioned against, or adjacent to, the tissue to be treated such that current can flow from the active electrode to the return electrode through the tissue. Accordingly, the electrosurgical/RF module 23 generator may be configured for therapeutic purposes by applying electrical energy to the tissue T sufficient for treating the tissue (e.g., cauterization).
In one embodiment, the electrosurgical/RF generator module 23 may be configured to deliver a sub-therapeutic RF signal to implement a tissue impedance measurement module. In one embodiment, the electrosurgical/RF generator module 23 comprises a bipolar RF generator as described in more detail below. In one embodiment, the electrosurgical/RF generator module 12 may be configured to monitor electrical impedance Z, of tissue T and to control the characteristics of time and power level based on the tissue T by way of a return electrode on provided on a clamp member of the end effector assembly 26. Accordingly, the electrosurgical/RF generator module 23 may be configured for sub-therapeutic purposes for measuring the impedance or other electrical characteristics of the tissue T. Techniques and circuit configurations for measuring the impedance or other electrical characteristics of tissue T are discussed in more detail in commonly assigned U.S. Patent Publication No. 2011/0015631, titled “Electrosurgical Generator for Ultrasonic Surgical Instruments,” the disclosure of which is herein incorporated by reference in its entirety.
A suitable ultrasonic generator module 21 may be configured to functionally operate in a manner similar to the GEN300 sold by Ethicon Endo-Surgery, Inc. of Cincinnati, Ohio as is disclosed in one or more of the following U.S. patents, all of which are incorporated by reference herein: U.S. Pat. No. 6,480,796 (Method for Improving the Start Up of an Ultrasonic System Under Zero Load Conditions); U.S. Pat. No. 6,537,291 (Method for Detecting Blade Breakage Using Rate and/or Impedance Information); U.S. Pat. No. 6,662,127 (Method for Detecting Presence of a Blade in an Ultrasonic System); U.S. Pat. No. 6,678,899 (Method for Detecting Transverse Vibrations in an Ultrasonic Surgical System); U.S. Pat. No. 6,977,495 (Detection Circuitry for Surgical Handpiece System); U.S. Pat. No. 7,077,853 (Method for Calculating Transducer Capacitance to Determine Transducer Temperature); U.S. Pat. No. 7,179,271 (Method for Driving an Ultrasonic System to Improve Acquisition of Blade Resonance Frequency at Startup); and U.S. Pat. No. 7,273,483 (Apparatus and Method for Alerting Generator Function in an Ultrasonic Surgical System).
It will be appreciated that in various embodiments, the generator 20 may be configured to operate in several modes. In one mode, the generator 20 may be configured such that the ultrasonic generator module 21 and the electrosurgical/RF generator module 23 may be operated independently. Alternatively, the ultrasonic generator module 21 may be configured to selectively apply either ultrasonic energy or either therapeutic sub-therapeutic RF energy to the end effector.
For example, the ultrasonic generator module 21 may be activated to apply ultrasonic energy to the end effector assembly 26 and subsequently, either therapeutic sub-therapeutic RF energy may be applied to the end effector assembly 26 by the electrosurgical/RF generator module 23. As previously discussed, the subtherapeutic electrosurgical/RF energy may be applied to tissue clamped between clamp elements of the end effector assembly 26 to measure tissue impedance to control the activation, or modify the activation, of the ultrasonic generator module 21. Tissue impedance feedback from the application of the subtherapeutic energy also may be employed to activate a therapeutic level of the electrosurgical/RF generator module 23 to seal the tissue (e.g., vessel) clamped between claim elements of the end effector assembly 26.
In another embodiment, the ultrasonic generator module 21 and the electrosurgical/RF generator module 23 may be activated simultaneously. In one example, the ultrasonic generator module 21 is simultaneously activated with a sub-therapeutic RF energy level to measure tissue impedance simultaneously while the ultrasonic blade of the end effector assembly 26 cuts and coagulates the tissue (or vessel) clamped between the clamp elements of the end effector assembly 26. Such feedback may be employed, for example, to modify the drive output of the ultrasonic generator module 21. In another example, the ultrasonic generator module 21 may be driven simultaneously with electrosurgical/RF generator module 23 such that the ultrasonic blade portion of the end effector assembly 26 is employed for cutting the damaged tissue while the electrosurgical/RF energy is applied to electrode portions of the end effector clamp assembly 26 for sealing the tissue (or vessel). Alternatively, the ultrasonic and the electrosurgical/RF energy can be employed sequentially with a single activation to achieve a desired tissue effect.
When the generator 20 is activated via the triggering mechanism, in one embodiment electrical energy is continuously applied by the generator 20 to a transducer stack or assembly of the acoustic assembly. In another embodiment, electrical energy is intermittently applied (e.g., pulsed) by the generator 20. A phase-locked loop in the control system of the generator 20 may monitor feedback from the acoustic assembly. The phase lock loop adjusts the frequency of the electrical energy sent by the generator 20 to match the resonant frequency of the selected longitudinal mode of vibration of the acoustic assembly. In addition, a second feedback loop in the control system 25 maintains the electrical current supplied to the acoustic assembly at a pre-selected constant level in order to achieve substantially constant excursion at the end effector 18 of the acoustic assembly. In yet another embodiment, a third feedback loop in the control system 25 monitors impedance between electrodes located in the end effector assembly 26. Although
In ultrasonic operation mode, the electrical signal supplied to the acoustic assembly may cause the distal end of the end effector 18 to vibrate longitudinally in the range of, for example, approximately 20 kHz to 250 kHz. According to various embodiments, the blade 22 may vibrate in the range of about 40 kHz to 56 kHz, for example, at about 50.0 kHz. In other embodiments, the blade 22 may vibrate at other frequencies including, for example, about 31 kHz or about 80 kHz. The excursion of the vibrations at the blade can be controlled by, for example, controlling the amplitude of the electrical signal applied to the transducer assembly of the acoustic assembly by the generator 20. As noted above, the triggering mechanism of the generator 20 allows a user to activate the generator 20 so that electrical energy may be continuously or intermittently supplied to the acoustic assembly. The generator 20 also has a power line for insertion in an electro-surgical unit or conventional electrical outlet. It is contemplated that the generator 20 can also be powered by a direct current (DC) source, such as a battery. The generator 20 can comprise any suitable generator, such as Model No. GEN04, and/or Model No. GEN11 available from Ethicon Endo-Surgery, Inc.
In the illustrated embodiment, the trigger assembly 24 comprises a trigger 32 that operates in conjunction with a fixed handle 34. The fixed handle 34 and the trigger 32 are ergonomically formed and adapted to interface comfortably with the user. The fixed handle 34 is integrally associated with the handle assembly 12. The trigger 32 is pivotally movable relative to the fixed handle 34 as explained in more detail below with respect to the operation of the ultrasonic surgical instrument 10. The trigger 32 is pivotally movable in direction 33A toward the fixed handle 34 when the user applies a squeezing force against the trigger 32. A spring element 98 (
In one example embodiment, the trigger 32 comprises an elongated trigger hook 36, which defines an aperture 38 between the elongated trigger hook 36 and the trigger 32. The aperture 38 is suitably sized to receive one or multiple fingers of the user therethrough. The trigger 32 also may comprise a resilient portion 32a molded over the trigger 32 substrate. The overmolded resilient portion 32a is formed to provide a more comfortable contact surface for control of the trigger 32 in outward direction 33B. In one example embodiment, the overmolded resilient portion 32a may be provided over a portion of the elongated trigger hook 36. The proximal surface of the elongated trigger hook 32 remains uncoated or coated with a non-resilient substrate to enable the user to easily slide their fingers in and out of the aperture 38. In another embodiment, the geometry of the trigger forms a fully closed loop which defines an aperture suitably sized to receive one or multiple fingers of the user therethrough. The fully closed loop trigger also may comprise a resilient portion molded over the trigger substrate.
In one example embodiment, the fixed handle 34 comprises a proximal contact surface 40 and a grip anchor or saddle surface 42. The saddle surface 42 rests on the web where the thumb and the index finger are joined on the hand. The proximal contact surface 40 has a pistol grip contour that receives the palm of the hand in a normal pistol grip with no rings or apertures. The profile curve of the proximal contact surface 40 may be contoured to accommodate or receive the palm of the hand. A stabilization tail 44 is located towards a more proximal portion of the handle assembly 12. The stabilization tail 44 may be in contact with the uppermost web portion of the hand located between the thumb and the index finger to stabilize the handle assembly 12 and make the handle assembly 12 more controllable.
In one example embodiment, the switch assembly 28 may comprise a toggle switch 30. The toggle switch 30 may be implemented as a single component with a central pivot 304 located within inside the handle assembly 12 to eliminate the possibility of simultaneous activation. In one example embodiment, the toggle switch 30 comprises a first projecting knob 30a and a second projecting knob 30b to set the power setting of the ultrasonic transducer 16 between a minimum power level (e.g., MIN) and a maximum power level (e.g., MAX). In another embodiment, the rocker switch may pivot between a standard setting and a special setting. The special setting provides one or more special programs to be implemented by the device. The toggle switch 30 rotates about the central pivot as the first projecting knob 30a and the second projecting knob 30b are actuated. The one or more projecting knobs 30a, 30b are coupled to one or more arms that move through a small arc and cause electrical contacts to close or open an electric circuit to electrically energize or de-energize the ultrasonic transducer 16 in accordance with the activation of the first or second projecting knobs 30a, 30b. The toggle switch 30 is coupled to the generator 20 to control the activation of the ultrasonic transducer 16. The toggle switch 30 comprises one or more electrical power setting switches to activate the ultrasonic transducer 16 to set one or more power settings for the ultrasonic transducer 16. The forces required to activate the toggle switch 30 are directed substantially toward the saddle point 42, thus avoiding any tendency of the instrument to rotate in the hand when the toggle switch 30 is activated.
In one example embodiment, the first and second projecting knobs 30a, 30b are located on the distal end of the handle assembly 12 such that they can be easily accessible by the user to activate the power with minimal, or substantially no, repositioning of the hand grip, making it suitable to maintain control and keep attention focused on the surgical site (e.g., a monitor in a laparoscopic procedure) while activating the toggle switch 30. The projecting knobs 30a, 30b may be configured to wrap around the side of the handle assembly 12 to some extent to be more easily accessible by variable finger lengths and to allow greater freedom of access to activation in awkward positions or for shorter fingers.
In the illustrated embodiment, the first projecting knob 30a comprises a plurality of tactile elements 30c, e.g., textured projections or “bumps” in the illustrated embodiment, to allow the user to differentiate the first projecting knob 30a from the second projecting knob 30b. It will be appreciated by those skilled in the art that several ergonomic features may be incorporated into the handle assembly 12. Such ergonomic features are described in U.S. Pat. App. Pub. No. 2009/055750 entitled “Ergonomic Surgical Instruments” which is incorporated by reference herein in its entirety.
In one example embodiment, the toggle switch 30 may be operated by the hand of the user. The user may easily access the first and second projecting knobs 30a, 30b at any point while also avoiding inadvertent or unintentional activation at any time. The toggle switch 30 may readily operated with a finger to control the power to the ultrasonic assembly 16 and/or to the ultrasonic assembly 16. For example, the index finger may be employed to activate the first contact portion 30a to turn on the ultrasonic assembly 16 to a maximum (MAX) power level. The index finger may be employed to activate the second contact portion 30b to turn on the ultrasonic assembly 16 to a minimum (MIN) power level. In another embodiment, the rocker switch may pivot the instrument 10 between a standard setting and a special setting. The special setting provides one or more special programs to be implemented by the instrument 10. The toggle switch 30 may be operated without the user having to look at the first or second projecting knob 30a, 30b. For example, the first projecting knob 30a or the second projecting knob 30b may comprise a texture or projections to tactilely differentiate between the first and second projecting knobs 30a, 30b without looking.
In other embodiments, the trigger 32 and/or the toggle switch 30 may be employed to actuate the electrosurgical/RF generator module 23 individually or in combination with activation of the ultrasonic generator module 21.
In one example embodiment, the distal rotation assembly 13 is rotatable without limitation in either direction about a longitudinal axis “T.” The distal rotation assembly 13 is mechanically engaged to the elongated shaft assembly 14. The distal rotation assembly 13 is located on a distal end of the handle assembly 12. The distal rotation assembly 13 comprises a cylindrical hub 46 and a rotation knob 48 formed over the hub 46. The hub 46 mechanically engages the elongated shaft assembly 14. The rotation knob 48 may comprise fluted polymeric features and may be engaged by a finger (e.g., an index finger) to rotate the elongated shaft assembly 14. The hub 46 may comprise a material molded over the primary structure to form the rotation knob 48. The rotation knob 48 may be overmolded over the hub 46. The hub 46 comprises an end cap portion 46a that is exposed at the distal end. The end cap portion 46a of the hub 46 may contact the surface of a trocar during laparoscopic procedures. The hub 46 may be formed of a hard durable plastic such as polycarbonate to alleviate any friction that may occur between the end cap portion 46a and the trocar. The rotation knob 48 may comprise “scallops” or flutes formed of raised ribs 48a and concave portions 48b located between the ribs 48a to provide a more precise rotational grip. In one example embodiment, the rotation knob 48 may comprise a plurality of flutes (e.g., three or more flutes). In other embodiments, any suitable number of flutes may be employed. The rotation knob 48 may be formed of a softer polymeric material overmolded onto the hard plastic material. For example, the rotation knob 48 may be formed of pliable, resilient, flexible polymeric materials including Versaflex® TPE alloys made by GLS Corporation, for example. This softer overmolded material may provide a greater grip and more precise control of the movement of the rotation knob 48. It will be appreciated that any materials that provide adequate resistance to sterilization, are biocompatible, and provide adequate frictional resistance to surgical gloves may be employed to form the rotation knob 48.
In one example embodiment, the handle assembly 12 is formed from two (2) housing portions or shrouds comprising a first portion 12a and a second portion 12b. From the perspective of a user viewing the handle assembly 12 from the distal end towards the proximal end, the first portion 12a is considered the right portion and the second portion 12b is considered the left portion. Each of the first and second portions 12a, 12b includes a plurality of interfaces 69 (
In one example embodiment, the elongated shaft assembly 14 comprises a proximal end 50 adapted to mechanically engage the handle assembly 12 and the distal rotation assembly 13; and a distal end 52 adapted to mechanically engage the end effector assembly 26. The elongated shaft assembly 14 comprises an outer tubular sheath 56 and a reciprocating tubular actuating member 58 located within the outer tubular sheath 56. The proximal end of the tubular reciprocating tubular actuating member 58 is mechanically engaged to the trigger 32 of the handle assembly 12 to move in either direction 60A or 60B in response to the actuation and/or release of the trigger 32. The pivotably moveable trigger 32 may generate reciprocating motion along the longitudinal axis “T.” Such motion may be used, for example, to actuate the jaws or clamping mechanism of the end effector assembly 26. A series of linkages translate the pivotal rotation of the trigger 32 to axial movement of a yoke coupled to an actuation mechanism, which controls the opening and closing of the jaws of the clamping mechanism of the end effector assembly 26. The distal end of the tubular reciprocating tubular actuating member 58 is mechanically engaged to the end effector assembly 26. In the illustrated embodiment, the distal end of the tubular reciprocating tubular actuating member 58 is mechanically engaged to a clamp arm assembly 64, which is pivotable about a pivot point 70, to open and close the clamp arm assembly 64 in response to the actuation and/or release of the trigger 32. For example, in the illustrated embodiment, the clamp arm assembly 64 is movable in direction 62A from an open position to a closed position about a pivot point 70 when the trigger 32 is squeezed in direction 33A. The clamp arm assembly 64 is movable in direction 62B from a closed position to an open position about the pivot point 70 when the trigger 32 is released or outwardly contacted in direction 33B.
In one example embodiment, the end effector assembly 26 is attached at the distal end 52 of the elongated shaft assembly 14 and includes a clamp arm assembly 64 and a blade 66. The jaws of the clamping mechanism of the end effector assembly 26 are formed by clamp arm assembly 64 and the blade 66. The blade 66 is ultrasonically actuatable and is acoustically coupled to the ultrasonic transducer 16. The trigger 32 on the handle assembly 12 is ultimately connected to a drive assembly, which together, mechanically cooperate to effect movement of the clamp arm assembly 64. Squeezing the trigger 32 in direction 33A moves the clamp arm assembly 64 in direction 62A from an open position, wherein the clamp arm assembly 64 and the blade 66 are disposed in a spaced relation relative to one another, to a clamped or closed position, wherein the clamp arm assembly 64 and the blade 66 cooperate to grasp tissue therebetween. The clamp arm assembly 64 may comprise a clamp pad 69 to engage tissue between the blade 66 and the clamp arm 64. Releasing the trigger 32 in direction 33B moves the clamp arm assembly 64 in direction 62B from a closed relationship, to an open position, wherein the clamp arm assembly 64 and the blade 66 are disposed in a spaced relation relative to one another.
The proximal portion of the handle assembly 12 comprises a proximal opening 68 to receive the distal end of the ultrasonic assembly 16. The ultrasonic assembly 16 is inserted in the proximal opening 68 and is mechanically engaged to the elongated shaft assembly 14.
In one example embodiment, the elongated trigger hook 36 portion of the trigger 32 provides a longer trigger lever with a shorter span and rotation travel. The longer lever of the elongated trigger hook 36 allows the user to employ multiple fingers within the aperture 38 to operate the elongated trigger hook 36 and cause the trigger 32 to pivot in direction 33B to open the jaws of the end effector assembly 26. For example, the user may insert three fingers (e.g., the middle, ring, and little fingers) in the aperture 38. Multiple fingers allows the surgeon to exert higher input forces on the trigger 32 and the elongated trigger hook 36 to activate the end effector assembly 26. The shorter span and rotation travel creates a more comfortable grip when closing or squeezing the trigger 32 in direction 33A or when opening the trigger 32 in the outward opening motion in direction 33B lessening the need to extend the fingers further outward. This substantially lessens hand fatigue and strain associated with the outward opening motion of the trigger 32 in direction 33B. The outward opening motion of the trigger may be spring-assisted by spring element 98 (
For example, during a surgical procedure either the index finger may be used to control the rotation of the elongated shaft assembly 14 to locate the jaws of the end effector assembly 26 in a suitable orientation. The middle and/or the other lower fingers may be used to squeeze the trigger 32 and grasp tissue within the jaws. Once the jaws are located in the desired position and the jaws are clamped against the tissue, the index finger can be used to activate the toggle switch 30 to adjust the power level of the ultrasonic transducer 16 to treat the tissue. Once the tissue has been treated, the user the may release the trigger 32 by pushing outwardly in the distal direction against the elongated trigger hook 36 with the middle and/or lower fingers to open the jaws of the end effector assembly 26. This basic procedure may be performed without the user having to adjust their grip of the handle assembly 12.
As previously discussed, the clamp arm assembly 64 may comprise electrodes electrically coupled to the electrosurgical/RF generator module 23 to receive therapeutic and/or sub-therapeutic energy, where the electrosurgical/RF energy may be applied to the electrodes either simultaneously or non-simultaneously with the ultrasonic energy being applied to the blade 66. Such energy activations may be applied in any suitable combinations to achieve a desired tissue effect in cooperation with an algorithm or other control logic.
In one example embodiment, an ultrasonic transmission waveguide 78 is disposed inside the reciprocating tubular actuating member 58. The distal end 52 of the ultrasonic transmission waveguide 78 is acoustically coupled (e.g., directly or indirectly mechanically coupled) to the blade 66 and the proximal end 50 of the ultrasonic transmission waveguide 78 is received within the handle assembly 12. The proximal end 50 of the ultrasonic transmission waveguide 78 is adapted to acoustically couple to the distal end of the ultrasonic transducer 16 as discussed in more detail below. The ultrasonic transmission waveguide 78 is isolated from the other elements of the elongated shaft assembly 14 by a protective sheath 80 and a plurality of isolation elements 82, such as silicone rings. The outer tubular sheath 56, the reciprocating tubular actuating member 58, and the ultrasonic transmission waveguide 78 are mechanically engaged by a pin 74. The switch assembly 28 comprises the toggle switch 30 and electrical elements 86a, 86b to electrically energize the ultrasonic transducer 16 in accordance with the activation of the first or second projecting knobs 30a, 30b.
In one example embodiment, the outer tubular sheath 56 isolates the user or the patient from the ultrasonic vibrations of the ultrasonic transmission waveguide 78. The outer tubular sheath 56 generally includes a hub 76. The outer tubular sheath 56 is threaded onto the distal end of the handle assembly 12. The ultrasonic transmission waveguide 78 extends through the opening of the outer tubular sheath 56 and the isolation elements 82 isolate the ultrasonic transmission waveguide 24 from the outer tubular sheath 56. The outer tubular sheath 56 may be attached to the waveguide 78 with the pin 74. The hole to receive the pin 74 in the waveguide 78 may occur nominally at a displacement node. The waveguide 78 may screw or snap into the hand piece handle assembly 12 by a stud. Flat portions on the hub 76 enable the assembly to be torqued to a required level. In one example embodiment, the hub 76 portion of the outer tubular sheath 56 is preferably constructed from plastic and the tubular elongated portion of the outer tubular sheath 56 is fabricated from stainless steel. Alternatively, the ultrasonic transmission waveguide 78 may comprise polymeric material surrounding it to isolate it from outside contact.
In one example embodiment, the distal end of the ultrasonic transmission waveguide 78 may be coupled to the proximal end of the blade 66 by an internal threaded connection, preferably at or near an antinode. It is contemplated that the blade 66 may be attached to the ultrasonic transmission waveguide 78 by any suitable means, such as a welded joint or the like. Although the blade 66 may be detachable from the ultrasonic transmission waveguide 78, it is also contemplated that the single element end effector (e.g., the blade 66) and the ultrasonic transmission waveguide 78 may be formed as a single unitary piece.
In one example embodiment, the trigger 32 is coupled to a linkage mechanism to translate the rotational motion of the trigger 32 in directions 33A and 33B to the linear motion of the reciprocating tubular actuating member 58 in corresponding directions 60A and 60B. The trigger 32 comprises a first set of flanges 98 with openings formed therein to receive a first yoke pin 92a. The first yoke pin 92a is also located through a set of openings formed at the distal end of the yoke 84. The trigger 32 also comprises a second set of flanges 96 to receive a first end 92a of a link 92. A trigger pin 90 is received in openings formed in the link 92 and the second set of flanges 96. The trigger pin 90 is received in the openings formed in the link 92 and the second set of flanges 96 and is adapted to couple to the first and second portions 12a, 12b of the handle assembly 12 to form a trigger pivot point for the trigger 32. A second end 92b of the link 92 is received in a slot 384 formed in a proximal end of the yoke 84 and is retained therein by a second yoke pin 94b. As the trigger 32 is pivotally rotated about the pivot point 190 formed by the trigger pin 90, the yoke translates horizontally along longitudinal axis “T” in a direction indicated by arrows 60A, 60B.
Ultrasonic Blades with Various Grasping Features
A minimum grasping force for an ultrasonic clamp arm in a medical forceps having a movable jaw member is about 2.25 lb-f when clamped on a dry chamois while the device is inactive. During activation, however, the tissue may milk out of the jaws either proximally or distally. The blade 100 comprising the tooth-like grasping features 102 for an ultrasonic shears device can help prevent tissue milking as well as provide better grasping forces.
Grasping features may take the form of several shapes as described in connection with
In one embodiment, the protrusions 806 (e.g., teeth) may be defined by several dimensions. A first dimension “a” represents the height of a protrusion 806 (e.g., tooth). In one embodiment, the dimension “a” may be about 0.12 mm to 0.18 mm. A second dimension “b” represents the width of a protrusion 806 (e.g., tooth). In one embodiment, the dimension “b” may be about 0.2 mm. A third dimension “c” represents the spacing between each protrusion 806. In one embodiment, the dimension “c” is about 0.5 mm. The protrusions 806 may cover, in one embodiment, a distance represented by dimension “d” which can be as little as 2 mm of the blade 804 to provide additional grasping strength. The 2 mm of protrusions 806 may comprise any percentage of the blade 804, such as, for example, 13% of a 15 mm blade. In one embodiment, the height of the protrusion 806 near the distal end 810 of the blade 804 may be approximately 2.3 mm. In one embodiment, the protrusions 806 may comprise about 5% of the total height of the blade 804. In various embodiments, the protrusions 806 may include a pitch of 0.3 mm-1.0 mm, a depth of approximately 0.08 mm-0.8 mm, and an angle of approximately 5-90 degrees. In various embodiments, the protrusions 806 may be in the form of blocks, bumps, spikes, or speed bumps, as previously described. These alternate embodiments of the protrusions 806 would be formed having similar dimensions as the protrusions 806 described in connection with
In one embodiment, the protrusions 806 may mate with alternating features formed on the clamp arm 802 or tissue pad 812 portion of the medical forceps 800. In another embodiment, this mating is neither necessary nor required. In one non-mating embodiment, grasping efficiency may be increased by 64% using three features in the form of teeth. The presence of the features does not affect the tissue transection ability of the blade 804. In one embodiment, the blade 804 may comprise protrusions 806 along the entire active length of the blade 804. The protrusions 806 may be configured to trap tissue and prevent disengagement during activation. Various embodiments of protrusions 806 may include blade teeth, horizontal trenches, or cavities, as previously described.
The present disclosure describes various embodiments of devices to prevent surgical matter, such as fluid or tissue, for example, from entering the space between an ultrasonic blade and an inner tube distal of the blade's distal seal. Two main categories of embodiments are described. First, a pressure or energy source attached to the blade-tube subassembly prevents fluid or tissue ingress into the space between the blade and the inner tube. Second, a flexible membrane(s) attached to either the blade or the inner tube prevents fluid or tissue ingress.
In one embodiment, surgical matter in the form of fluid or tissue, for example, could be prevented from entering the distal inner tube area by the application of a constant pressure of a fluid medium (e.g., air, CO2 or saline solution) in the distal direction.
In various other embodiments, a boot barrier (or seal, for example) may be added to an end effector portion of an ultrasonic instrument to prevent the buildup of surgical matter on the end effector. The boot barrier seals the ultrasonic blade to the distal ends of one or more tube(s) near to the proximal end of the tissue effecting portion of the ultrasonic blade. The boot barrier may be made from any suitable materials including compliant, thermally robust material that has a relatively low coefficient of friction in order to minimize the seal load on the blade. Materials suitable for the boot barrier may include, for example, silicone rubber, parylene coated silicon rubber, Tetrafluoroethylene-hexafluoropropylene (FEP), which has similar properties to those of Polytetrafluoroethylene (PTFE) otherwise known in the trade as Teflon, shrink tubing, or any similar material. In another embodiment, the blade may be coated to reduce power draw of the instrument due to inclusion of the boot barrier.
The boot barrier seals to the blade and may provide slight interference to the blade. Where the boot barrier seals to the blade, the boot barrier does not provide vertical reaction for clamping/bending of the blade in order to keep the load on the blade (from the boot) minimized. The boot barrier may seal to the outer diameter of the tube(s), the inner diameter of the tube(s) or both. One or more retention features may be provided on the blade and/or the tube(s) for retaining the boot to the blade and/or the tube(s). In one embodiment, the retention features may also be located on the boot barrier itself.
Generally, the boot barrier prevents build up and accumulation of surgical matter such as, for example, tissue, blood, melted fat, and other related materials encountered during surgery, between the distal portion of the tube(s) and the nearby portion of the blade of the ultrasonic surgery device. This build up and accumulation may result in large and inconsistent mechanical loads on the system resulting in procedure interruptions due to high impedance either causing resonance issues or causing the system to bog down and potentially stop during activation. The tube(s) are needed to protect tissue and users from the ultrasonically active blade and, in the case of shears-type device, to support and/or drive a clamp arm. Ideally, the ultrasonic blade is as active (ultrasonically) as possible in the proximal portion of its tissue effecting length. Solutions that maximize this ultrasonic activity also elongate the portion of the blade between its most distal node and the proximal end its tissue effecting length. The result is a relatively large annular volume that accumulates tissue, blood, fat, etc. with the aforementioned issues.
Present ultrasonic devices utilize a tube-in-tube (TnT) closure mechanism to enable closure of the clamp arm, referred to herein as a movable jaw member, against an active length of the ultrasonic blade. The following embodiments of alternate closure mechanisms for ultrasonic devices may yield several advantages. For example, there may be differences among the drag force of actuating the inner tube against the outer tube results in variation in device clamp force. Additionally, the pivot location of the clamp arm on the outer tube causes a sharp angular closure, and magnifies the impact to a non-uniform closure profile. Furthermore, the predicate device mechanism may be sensitive to variation in components, as the stackup links the inner and outer tube at the location of the insulated pin, which currently sits near the proximal end of the tube assembly.
One embodiment of an ultrasonic device comprising an alternate closure mechanism is described hereinbelow in connection with
With reference now to
Another embodiment of an ultrasonic device comprising an alternate closure mechanism is described in connection with
With reference now to
Yet another embodiment of an ultrasonic device comprising an alternate closure mechanism is described in connection with
With reference now to
Any of the inner tubes and/or outer tubes disclosed herein may be coated with a polymer used as moisture and dielectric barriers. Among them, parylene C may be selected due to its combination of barrier properties, cost, and other processing advantages. Parylene is the trade name for a variety of chemical vapor deposited poly(p-xylylene), for example. The polymer coating is used to prevent shorting in the shaft from the blade to adjacent metal parts. In one embodiment, the just the inner tube (e.g., actuator) may be coated to prevent it from shorting to the blade which is one “pole” in the combined ultrasonic and bipolar (RF) device, where the other “pole” is the outer tube and the clamp arm. The inner tube insulation provides a more robust and space efficient electrical insulating barrier than an intervening plastic tube, which may be considered an alternative embodiment.
Transducer Support and Limited Rotation with Single Component
In one embodiment, a shaft rotation limiter comprises a single piece which interfaces with a transducer flange by a threaded connection. The rotation limiter provides radial support through a component fixed in the shroud channels. The amount of rotation is limited by the allowed lateral motion of the component in the shroud channels as it is threaded along the transducer. One example of a shaft rotation limiter is described in connection with
Limited Rotation of Ultrasonic Device with Rotation >360°
Unlimited (continuous) rotation of an ultrasonic shear device with an integrated transducer requires the use of additional components that may not be cost-effective. One cost-effective solution is to limit rotation of the shaft of the device, thus allowing for a direct-wired connection between the transducer and the hand activation circuit. A tactile benefit is added to the mechanism that would limit rotation but provide tactile feedback before a hard stop is hit. This tactile feedback element may enable the user to change the way they use the device, either through rotating their wrist to get additional rotation or to choose to rotate the device back to a neutral position to ensure they have enough rotation to accomplish the task they need to perform.
The tactile feedback element is added to the limited rotation mechanism shown in
The purpose of the contoured extrusion element 4930 (
RF Spot Coagulation with Integrated Ultrasonic/RF Generator
In one embodiment, the integrated RF/ultrasonic instrument 5000 is wired such that the horn/blade 5002 is directly connected to the positive lead 5006 of the generator 5004. Conventional ultrasonic devices are wired such that the negative/return lead is connected to the horn/blade. A switch 5010 is provided to enable two device functionalities (1) ultrasonic and (2) bipolar (RF) to be performed. The first state of the switch 5010 connects the negative/return lead 5008 to the piezoelectric transducer (PZT) stack 5020 such that the generator 5004 drives the PZT stack 5020. The second state of the switch 5010 isolates the PZT stack 5020 and connects the negative/return 5008 to the device tube 5016 and a movable jaw member 5022 (e.g., clamp arm) through an electrical conductor 5014 and allows the generator 5004 signal to be driven through tissue 5018 located between the blade 5002 and the clamp arm 5022. The resistance in the tissue 5018 seals the vessels. Feedback signals also may be provided back to the generator 5004 to adjust signal parameters (e.g., amplitude, frequency, pulsing, modulation, etc.)
In one embodiment, the integrated RF/ultrasonic instrument 5000 may comprise a sealing button, wherein, when pressed, the generator 5004 may produce bipolar RF energy through the handpiece and into the ultrasonic blade 5002 and return through the clamp arm 5022. In one embodiment, the electrical RF current may travel around the outside of the blade 5002 and create a robust bi-polar seal. The duration of the bipolar RF energy may be about one second, after which an algorithm may cause the generator 5004 to switch to the ultrasonic power curve, wherein the blade 5002 would be activated and the cut completed in the middle of two RF seals.
Ultrasonic cutting also may provide some sealing. The application of RF energy provides added confidence that there is an RF seal in place on each side of the blade 5002.
In one embodiment, the RF/ultrasonic device comprises a blade or clamp arm or both with the distal end coated with thermally and electrically insulative material, wherein a distal end of the blade or clamp arm or both may have varying degrees of exposed (uncoated) areas that will be application dependent. In another embodiment, the exposed area on the blade or clamp arm or both may vary depending on application and may be either symmetrical or asymmetrical. In another embodiment, the exposed area on the blade may comprise at least one exposed area/segment separated by at least one coated segment. In one embodiment, a process of masking the blade or clamp arm or both to generate exposed area is provided. Alternatively, coating may be selectively removed to produce the same desired effect. Specific embodiments of such coated blades are described hereinbelow in connection with
A slidable switch 5074 comprises a slidable female connector 5048 configured to receive a rotatable jack connector 5046. The rotatable jack connector 5046 is used for mating with the slidable female connector 5048 for providing an electrical connection between two electrical devices, such as the transducer 5034 and the generator 5032. Referring particularly to
In one embodiment, the slidable female connector 5048 is slidable between Position 1 and Position 2. Position 1 may be configured to correspond with ultrasonic mode of operation and Position 2 may be configured to correspond with monopolar mode of operation. In Position 1, the monopolar RF lead 5042 (M+) from the monopolar RF generator 5044 is disconnected physically from the transducer 5034. The slidable female connector 5048 comprises contact portions 5066, 5068, 5070, 5072 configured to electrically engage terminal portions 5052, 5056, 5060, 5064. The slidable female connector 5048 includes an actuator portion 5074 that enables the user to slide the slidable female connector 5048 between multiple positions. As shown in particular in
Moving the slidable female connector 5048 into Position 1 places the integrated RF/ultrasonic instrument 5030 in ultrasonic mode. In this position, the contact portions 5066, 5068 are electrically engaged with terminal portions 5060, 5064 thereby electrically coupling positive and negative leads 5036 (H+), 5038 (H−) of the ultrasonic generator 5040 to the transducer 5034 through conductive terminal portions 3 and 4. In position 1, the monopolar positive lead 5042 (M+) coupled to the RF generator 5044 is physically disconnected from the transducer 5034.
Moving the slidable female connector 5048 into Position 2 places the integrated RF/ultrasonic instrument 5030 in monopolar RF mode. In this position, the contact portions 5066, 5068 are electrically engaged with terminal portions 5052, 5056 thereby electrically coupling positive and negative leads 5036 (H+), 5038 (H−) of the ultrasonic generator 5040 to isolated conductive terminal portions 1 and 2, effectively disconnecting the ultrasonic generator 5040 from the transducer 5034. In position 2, contact portion 5070 electrically engages terminal portion 5060 thereby electrically coupling the monopolar positive lead 5042 (M+) of the RF generator 5044 to the transducer 5034 through conductive terminal portion 3. Contact portion 5072 electrically engages terminal tip portion 5064, which is electrically isolated, or open.
Accordingly, in one embodiment, an ultrasonic blade 5100 comprises a lubricious coating 5102 having properties similar to Teflon on the distal end of the blade 5100 as shown in
In another embodiment, the blade and/or the tube assembly may be electrically charged to repel surgical matter.
Ultrasonic 4-Bar Closure with Application to an Ultrasonic Rongeur
Accordingly,
While various details have been set forth in the foregoing description, it will be appreciated that the various aspects of the ultrasonic and electrosurgical devices may be practiced without these specific details. For example, for conciseness and clarity selected aspects have been shown in block diagram form rather than in detail. Some portions of the detailed descriptions provided herein may be presented in terms of instructions that operate on data that is stored in a computer memory. Such descriptions and representations are used by those skilled in the art to describe and convey the substance of their work to others skilled in the art. In general, an algorithm refers to a self-consistent sequence of steps leading to a desired result, where a “step” refers to a manipulation of physical quantities which may, though need not necessarily, take the form of electrical or magnetic signals capable of being stored, transferred, combined, compared, and otherwise manipulated. It is common usage to refer to these signals as bits, values, elements, symbols, characters, terms, numbers, or the like. These and similar terms may be associated with the appropriate physical quantities and are merely convenient labels applied to these quantities.
Unless specifically stated otherwise as apparent from the foregoing discussion, it is appreciated that, throughout the foregoing description, discussions using terms such as “processing” or “computing” or “calculating” or “determining” or “displaying” or the like, refer to the action and processes of a computer system, or similar electronic computing device, that manipulates and transforms data represented as physical (electronic) quantities within the computer system's registers and memories into other data similarly represented as physical quantities within the computer system memories or registers or other such information storage, transmission or display devices.
It is worthy to note that any reference to “one aspect,” “an aspect,” “one embodiment,” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the aspect is included in at least one aspect. Thus, appearances of the phrases “in one aspect,” “in an aspect,” “in one embodiment,” or “in an embodiment” in various places throughout the specification are not necessarily all referring to the same aspect. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more aspects.
Some aspects may be described using the expression “coupled” and “connected” along with their derivatives. It should be understood that these terms are not intended as synonyms for each other. For example, some aspects may be described using the term “connected” to indicate that two or more elements are in direct physical or electrical contact with each other. In another example, some aspects may be described using the term “coupled” to indicate that two or more elements are in direct physical or electrical contact. The term “coupled,” however, also may mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other.
Although various embodiments have been described herein, many modifications, variations, substitutions, changes, and equivalents to those embodiments may be implemented and will occur to those skilled in the art. Also, where materials are disclosed for certain components, other materials may be used. It is therefore to be understood that the foregoing description and the appended claims are intended to cover all such modifications and variations as falling within the scope of the disclosed embodiments. The following claims are intended to cover all such modification and variations.
Some or all of the embodiments described herein may generally comprise technologies for ultrasonic and RF treatment of tissue, or otherwise according to technologies described herein. In a general sense, those skilled in the art will recognize that the various aspects described herein which can be implemented, individually and/or collectively, by a wide range of hardware, software, firmware, or any combination thereof can be viewed as being composed of various types of “electrical circuitry.” Consequently, as used herein “electrical circuitry” includes, but is not limited to, electrical circuitry having at least one discrete electrical circuit, electrical circuitry having at least one integrated circuit, electrical circuitry having at least one application specific integrated circuit, electrical circuitry forming a general purpose computing device configured by a computer program (e.g., a general purpose computer configured by a computer program which at least partially carries out processes and/or devices described herein, or a microprocessor configured by a computer program which at least partially carries out processes and/or devices described herein), electrical circuitry forming a memory device (e.g., forms of random access memory), and/or electrical circuitry forming a communications device (e.g., a modem, communications switch, or optical-electrical equipment). Those having skill in the art will recognize that the subject matter described herein may be implemented in an analog or digital fashion or some combination thereof.
The foregoing detailed description has set forth various embodiments of the devices and/or processes via the use of block diagrams, flowcharts, and/or examples. Insofar as such block diagrams, flowcharts, and/or examples contain one or more functions and/or operations, it will be understood by those within the art that each function and/or operation within such block diagrams, flowcharts, or examples can be implemented, individually and/or collectively, by a wide range of hardware, software, firmware, or virtually any combination thereof. In one embodiment, several portions of the subject matter described herein may be implemented via Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), digital signal processors (DSPs), or other integrated formats. However, those skilled in the art will recognize that some aspects of the embodiments disclosed herein, in whole or in part, can be equivalently implemented in integrated circuits, as one or more computer programs running on one or more computers (e.g., as one or more programs running on one or more computer systems), as one or more programs running on one or more processors (e.g., as one or more programs running on one or more microprocessors), as firmware, or as virtually any combination thereof, and that designing the circuitry and/or writing the code for the software and or firmware would be well within the skill of one of skill in the art in light of this disclosure. In addition, those skilled in the art will appreciate that the mechanisms of the subject matter described herein are capable of being distributed as a program product in a variety of forms, and that an illustrative embodiment of the subject matter described herein applies regardless of the particular type of signal bearing medium used to actually carry out the distribution. Examples of a signal bearing medium include, but are not limited to, the following: a recordable type medium such as a floppy disk, a hard disk drive, a Compact Disc (CD), a Digital Video Disk (DVD), a digital tape, a computer memory, etc.; and a transmission type medium such as a digital and/or an analog communication medium (e.g., a fiber optic cable, a waveguide, a wired communications link, a wireless communication link (e.g., transmitter, receiver, transmission logic, reception logic, etc.), etc.).
All of the above-mentioned U.S. patents, U.S. patent application publications, U.S. patent applications, foreign patents, foreign patent applications, non-patent publications referred to in this specification and/or listed in any Application Data Sheet, or any other disclosure material are incorporated herein by reference, to the extent not inconsistent herewith. As such, and to the extent necessary, the disclosure as explicitly set forth herein supersedes any conflicting material incorporated herein by reference. Any material, or portion thereof, that is said to be incorporated by reference herein, but which conflicts with existing definitions, statements, or other disclosure material set forth herein will only be incorporated to the extent that no conflict arises between that incorporated material and the existing disclosure material.
One skilled in the art will recognize that the herein described components (e.g., operations), devices, objects, and the discussion accompanying them are used as examples for the sake of conceptual clarity and that various configuration modifications are contemplated. Consequently, as used herein, the specific exemplars set forth and the accompanying discussion are intended to be representative of their more general classes. In general, use of any specific exemplar is intended to be representative of its class, and the non-inclusion of specific components (e.g., operations), devices, and objects should not be taken limiting.
With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations are not expressly set forth herein for sake of clarity.
The herein described subject matter sometimes illustrates different components contained within, or connected with, different other components. It is to be understood that such depicted architectures are merely exemplary, and that in fact many other architectures may be implemented which achieve the same functionality. In a conceptual sense, any arrangement of components to achieve the same functionality is effectively “associated” such that the desired functionality is achieved. Hence, any two components herein combined to achieve a particular functionality can be seen as “associated with” each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Likewise, any two components so associated can also be viewed as being “operably connected,” or “operably coupled,” to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being “operably couplable,” to each other to achieve the desired functionality. Specific examples of operably couplable include but are not limited to physically mateable and/or physically interacting components, and/or wirelessly interactable, and/or wirelessly interacting components, and/or logically interacting, and/or logically interactable components.
In some instances, one or more components may be referred to herein as “configured to,” “configurable to,” “operable/operative to,” “adapted/adaptable,” “able to,” “conformable/conformed to,” etc. Those skilled in the art will recognize that “configured to” can generally encompass active-state components and/or inactive-state components and/or standby-state components, unless context requires otherwise.
While particular aspects of the present subject matter described herein have been shown and described, it will be apparent to those skilled in the art that, based upon the teachings herein, changes and modifications may be made without departing from the subject matter described herein and its broader aspects and, therefore, the appended claims are to encompass within their scope all such changes and modifications as are within the true spirit and scope of the subject matter described herein. It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to claims containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations.
In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that typically a disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms unless context dictates otherwise. For example, the phrase “A or B” will be typically understood to include the possibilities of “A” or “B” or “A and B.”
With respect to the appended claims, those skilled in the art will appreciate that recited operations therein may generally be performed in any order. Also, although various operational flows are presented in a sequence(s), it should be understood that the various operations may be performed in other orders than those which are illustrated, or may be performed concurrently. Examples of such alternate orderings may include overlapping, interleaved, interrupted, reordered, incremental, preparatory, supplemental, simultaneous, reverse, or other variant orderings, unless context dictates otherwise. Furthermore, terms like “responsive to,” “related to,” or other past-tense adjectives are generally not intended to exclude such variants, unless context dictates otherwise.
In certain cases, use of a system or method may occur in a territory even if components are located outside the territory. For example, in a distributed computing context, use of a distributed computing system may occur in a territory even though parts of the system may be located outside of the territory (e.g., relay, server, processor, signal-bearing medium, transmitting computer, receiving computer, etc. located outside the territory).
A sale of a system or method may likewise occur in a territory even if components of the system or method are located and/or used outside the territory. Further, implementation of at least part of a system for performing a method in one territory does not preclude use of the system in another territory.
Although various embodiments have been described herein, many modifications, variations, substitutions, changes, and equivalents to those embodiments may be implemented and will occur to those skilled in the art. Also, where materials are disclosed for certain components, other materials may be used. It is therefore to be understood that the foregoing description and the appended claims are intended to cover all such modifications and variations as falling within the scope of the disclosed embodiments. The following claims are intended to cover all such modification and variations.
In summary, numerous benefits have been described which result from employing the concepts described herein. The foregoing description of the one or more embodiments has been presented for purposes of illustration and description. It is not intended to be exhaustive or limiting to the precise form disclosed. Modifications or variations are possible in light of the above teachings. The one or more embodiments were chosen and described in order to illustrate principles and practical application to thereby enable one of ordinary skill in the art to utilize the various embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the claims submitted herewith define the overall scope.
Various aspects of the subject matter described herein are set out in the following numbered clauses:
1. An ultrasonic surgical instrument, comprising: a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to an ultrasonic transducer; a tube defining a lumen, wherein the waveguide is located within the lumen; an end effector coupled to the distal end of the waveguide, the end effector comprising an ultrasonic blade and a clamp arm operatively coupled to the end effector; and a tissue accumulation impedance mechanism coupled to the end effector, wherein the tissue accumulation impedance mechanism is configured to prevent tissue from accumulating within the lumen.
2. The surgical instrument of clause 1, wherein the tissue accumulation impedance mechanism comprises a boot barrier configured to create a seal between the tube and the end effector.
3. The surgical instrument of clause 2, wherein the boot barrier is sealed to the tube
4. The surgical instrument of clause 2, wherein the boot is retained by the tube or end effector using one or more retention features.
5. The surgical instrument of clause 2, wherein the boot barrier is sealed to the ultrasonic blade by way of an interference fit between the boot barrier and the ultrasonic blade.
6. The surgical instrument of clause 2, wherein the boot barrier comprises a cavity.
7. The surgical instrument of clause 6, wherein the cavity is rounded to allow fluid to flow out of the cavity.
8. The surgical instrument of clause 2, wherein the boot barrier comprises a plurality of contact points with the blade.
9. The surgical instrument of claim 1, wherein the tissue accumulation impedance mechanism comprises one or more apertures in the tube.
10. The surgical instrument of claim 9, wherein the apertures comprise one or more windows.
11. The surgical instrument of claim 9, wherein the apertures comprises one or more holes.
12. The surgical instrument of claim 1, wherein the tube comprises a distal portion, wherein the distal portion comprises a half-circle cross section.
13. The surgical instrument of claim 1, wherein the tube comprises one or more ribs formed on an inner side of the tube.
14. The surgical instrument of claim 1, wherein the tissue accumulation impedance mechanism comprises a pump configured to provide a positive pressure flow between the blade and the tube, wherein the positive pressure flow prevents tissue ingress into the lumen.
15. The surgical instrument of claim 1, wherein the pump is located distally to a distal-most overmolded seal located within the lumen.
16. The surgical instrument of claim 1, wherein the tissue accumulation impedance mechanism comprises a slidable tube disposed within the lumen, the slidable tube slidable from a first position to a second position, wherein in the first position the slidable tube is disposed over the blade, and wherein in the second position the blade is exposed.
17. An ultrasonic surgical instrument comprising: z waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to a transducer; an end effector coupled to the distal end of the waveguide, the end effector comprising at least one tissue retention feature; a clamp arm operatively coupled to the end effector.
18. The surgical instrument of claim 17, wherein the at least one tissue retention feature comprises one or more indentations/grooves/notches formed in the end effector.
19. The surgical instrument of claim 18, wherein the one or more indentations comprise triangular teeth.
20. The surgical instrument of claim 18, wherein the one or more indentations comprise holes.
21. The surgical instrument of claim 18, wherein the one or more indentations comprise horizontal trenches.
22. The surgical instrument of claim 17, wherein the at least one tissue retention feature is offset from the tissue dividing crown of the end effector.
23. The surgical instrument of claim 17, wherein the at least on tissue retention feature comprises one or more projections from the end effector.
24. The surgical instrument of claim 23, wherein the one or more projections comprise triangular teeth.
25. The surgical instrument of claim 23, wherein the one or more projections comprise blocks.
26. The surgical instrument of claim 23, wherein the one or more projections comprise horizontal bumps.
27. The surgical instrument of claim 23, wherein the one or more projections comprise circular bumps.
28. The surgical instrument of claim 17, wherein the at least one tissue retention feature is disposed over an entire length of the blade.
29. The surgical instrument of claim 17, wherein the at least one tissue retention feature is disposed over a discrete section of the blade.
30. An ultrasonic surgical instrument, comprising: a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to a transducer; an end effector operatively coupled to the distal end of the waveguide guide; a rotation shroud configured to rotate the waveguide; and a rotation stop mechanism coupled to the rotation shroud prevent rotation of the rotation knob beyond a predetermined rotation.
31. The surgical instrument of claim 30, wherein the shroud comprises: at least one channel; and at least one boss, the at least one boss located within the at least one channel, wherein the at least one boss has a predetermined lateral movement limit, wherein when the at least one boss reaches the predetermined lateral movement limit, the at least one boss prevents further rotation of the rotation knob.
32. The surgical instrument of claim 30, wherein the rotation stop comprises: a gate comprising a first wing and a second wing, wherein the first and second wings are disposed at an angle, wherein the gate is disposed within the shroud, and wherein the gate allows a predetermined angle of rotation of the shroud.
33. The surgical instrument of claim 30, wherein the rotation stop comprises a contoured extrusion element.
34. The surgical instrument of claim 33, wherein the contoured extrusion element comprises a tactile feedback element.
35. The surgical instrument of claim 34, wherein the tactile feedback element comprises a semi-compliant material selected from the group consisting of rubber, medium to high density rubber, silicone, thermoplastic elastomer, springy piece of stainless steel, spring steel, copper, shape memory metal, and combinations of any thereof.
36. An ultrasonic surgical instrument, comprising: a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to a transducer; an end effector coupled to the distal end of the waveguide; a clamp arm operatively coupled to the end effector; and a tube disposed over the waveguide, wherein the tube comprises a counter deflection element, wherein the counter deflection element is configured to allow deflection of the blade, wherein the deflection of the blade counteracts a force placed on the blade by the clamp arm when in a clamped position.
37. A surgical instrument comprising: a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to a signal source, the signal source configured to provide an ultrasonic signal and an electrosurgical signal; an end effector coupled to the waveguide; a clamp arm operatively coupled to the end effector; and a sealing button, wherein the sealing button causes the surgical instrument to deliver the electrosurgical signal to the end effector and the clamp arm for a first period, and wherein the sealing button causes the surgical instrument to deliver the ultrasonic signal to the blade for a second period, wherein the second period is subsequent to the first period.
38. A surgical instrument, comprising: a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to a transducer; an end effector coupled to the distal end of the waveguide; a tube disposed over the waveguide; a cam surface formed on an outer surface of the tube; and a clamp arm operatively coupled to the cam surface.
39. The surgical instrument of claim 38, comprising: a pivot pin located within a hole defined by the end effector, the pivot pin operatively coupled to the clamp arm, wherein the clamp arm pivots about the pivot pin.
40. The surgical instrument of claim 39, wherein the pivot pin is located at the distal most node of the waveguide.
41. The surgical instrument of claim 38, wherein the tube is actuatable, and wherein the clamp arm is cammed open and closed against the end effector through relative motion between the tube and the end effector.
42. A surgical instrument, comprising: a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to a transducer; an end effector coupled to the distal end of the waveguide, the end effector defining a pin hole; a rigid pin disposed within the pin hole; a clamp arm; and a four-bar linkage; wherein the four-bar linkage is operatively coupled to the clamp arm and the rigid pin, wherein the four-bar linkage is actuatable to move the clamp arm to a clamped position.
43. The surgical instrument of claim 40, comprising: an outer tube, wherein the outer tube is coupled to the four-bar linkage, and wherein the outer-tube actuates the four-bar linkage from a first position to a second position.
44. An ultrasonic surgical instrument, comprising: a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to a transducer; and an end effector coupled to the distal end of the waveguide, wherein the end effector is partially coated with thermally and electrically insulative material such that the distal end of the end effector comprises one or more exposed sections.
45. The ultrasonic surgical instrument of claim 44, wherein the one or more exposed areas are symmetrical.
46. The ultrasonic surgical instrument of claim 44, wherein the one or more exposed areas are asymmetrical.
47. The ultrasonic surgical instrument of claim 44, wherein the one or more exposed sections are separated by one or more coated sections.
48. The ultrasonic surgical instrument of claim 44, wherein the waveguide is fully coated with thermally and electrically insulative material.
49. The ultrasonic surgical instrument of claim 44, wherein the waveguide is partially coated with thermally and electrically insulative material.
50. An ultrasonic surgical instrument, comprising: a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to a transducer; and an end effector coupled to the distal end of the waveguide, a clamp arm operatively connected to the end effector wherein the clamp arm is partially coated with thermally and electrically insulative material such that the distal end of the clamp arm comprises one or more exposed sections.
51. The ultrasonic surgical instrument of claim 50, wherein the one or more exposed areas are symmetrical.
52. The ultrasonic surgical instrument of claim 50, wherein the one or more exposed areas are asymmetrical.
53. The ultrasonic surgical instrument of claim 50, wherein the one or more exposed sections are separated by one or more coated sections.
54. The ultrasonic surgical instrument of claim 50, wherein the waveguide is fully coated with thermally and electrically insulative material.
55. The ultrasonic surgical instrument of claim 50, wherein the waveguide is fully coated with thermally and electrically insulative material.
56. An ultrasonic surgical instrument, comprising: a waveguide comprising a proximal end and a distal end, wherein the proximal end is coupled to a transducer; and an end effector coupled to the distal end of the waveguide, a clamp arm operatively connected to the end effector wherein the clamp arm and the end effector are partially coated with thermally and electrically insulative material such that the distal end of the end effector and clamp arm comprise one or more exposed sections.
57. The ultrasonic surgical instrument of claim 56, wherein the one or more exposed areas are symmetrical.
58. The ultrasonic surgical instrument of claim 56, wherein the one or more exposed areas are asymmetrical.
59. The ultrasonic surgical instrument of claim 56, wherein the one or more exposed sections are separated by one or more coated sections.
60. The ultrasonic surgical instrument of claim 56, wherein the waveguide is fully coated with thermally and electrically insulative material.
61. The ultrasonic surgical instrument of claim 56, wherein the waveguide is fully coated with thermally and electrically insulative material.
62. An ultrasonic surgical instrument, comprising: ultrasonic end effector comprising an ultrasonic surgical blade and a clamp arm; and a heat shield provided at a predetermined distance from the ultrasonic blade.
63. The ultrasonic instrument of claim 62, wherein the heat shield is rotatable about the ultrasonic blade.
64. The ultrasonic instrument of 62, comprising a heat sink.
65. The ultrasonic instrument of 62, wherein the heat shield comprises a plurality of apertures.
66. The ultrasonic instrument of 62, wherein the heat shield comprises a tapered portion.
67. An integrated radio frequency (RF)/ultrasonic surgical instrument, comprising: an ultrasonic transducer; a jack connector electrically coupled to the ultrasonic transducer; and a slidable female mating plug matable with the jack connector; wherein the slidable female mating plug is slidable in multiple positions to electrically couple the ultrasonic transducer to either an ultrasonic energy source or an RF energy source.
68. The integrated radio frequency (RF)/ultrasonic surgical instrument of claim 67, wherein the jack connector is rotatable with the ultrasonic transducer.
69. The integrated radio frequency (RF)/ultrasonic surgical instrument of claim 67, wherein the jack connector is a four-lead jack connector.
70. The integrated radio frequency (RF)/ultrasonic surgical instrument of claim 67, wherein the slidable female mating plug in slidable between a first position and a second position; wherein in the first position the ultrasonic transducer is electrically coupled to the ultrasonic energy source and is electrically isolated from the RF energy source; and wherein in the second position the ultrasonic transducer is electrically coupled to the RF energy source and is electrically isolated from the ultrasonic energy source.
71. An ultrasonic energy driven rongeur device, comprising: at least one elongate member; a linkage connected to a distal end of the at least one elongate member; an ultrasonic transducer coupled to the at least one elongate member; and a pivot located at an ultrasonic node of the at least one elongate member.
72. The ultrasonic energy driven rongeur device of claim 71, comprising: a second linkage connected to a proximal end of the at least one elongate member; and a second pivot located at a second ultrasonic of the at least one elongate member.
73. The ultrasonic energy driven rongeur device of claim 71, comprising: a second elongate member above the at least one elongate member; and a damping material disposed between the least one elongate member and the second elongate member.
Claims
1. A surgical instrument, comprising:
- an ultrasonic waveguide comprising a proximal end and a distal end, wherein the proximal end is configured to couple to an ultrasonic transducer;
- a tube defining a lumen, wherein the waveguide is located within the lumen;
- an end effector coupled to the distal end of the waveguide, the end effector comprising an ultrasonic blade and a clamp arm comprising a movable jaw member; and
- a shaft assembly configured to counteract deflection of the blade.
2. The surgical instrument of claim 1, wherein the tube comprises a counter deflection element to enable deflection of the blade to counteract forces applied to the blade by the movable jaw member when in a clamped position against the blade.
3. The surgical instrument of claim 2, wherein the counter deflection element is provided on the tube at a node of the blade that is proximal to the distal node of the blade to counteract deflection of the blade by the movable jaw member.
4. The surgical instrument of claim 3, wherein a downward deflection of the blade by the movable jaw member is counteracted by a downward reaction force of the counter deflection element at the node proximal to the distal node.
5. The surgical instrument of claim 2, wherein the counter deflection element comprises a bulge formed into the lumen defined of the tube to provide a downward counter force to a clamping force exerted against the blade by the movable jaw member.
6. The surgical instrument of claim 2, wherein the counter deflection element comprises a window defined in the tube to enable a downward force to deflect the blade without making contact with an opposing wall of the inner tube.
7. A surgical instrument, comprising:
- a waveguide comprising a proximal end and a distal end, wherein the proximal end is configured to couple to an ultrasonic transducer;
- a tube defining a lumen, wherein the waveguide is disposed within the lumen;
- an end effector comprising an ultrasonic blade defining a hole to receive a first pivot pin and a movable clamp arm operatively coupled to the cam surface; and
- a cam surface formed on an outer surface of the tube to receive a second pivot pin attached to the movable clamp arm.
8. The surgical instrument of claim 7, further comprising a first pivot pin located in the hole defined by the blade.
9. The surgical instrument of claim 8, wherein the tube is actuatable and wherein the clamp arm is cammed open and closed against the blade through relative motion between the tube and the blade, such that the movable clamp arm rotates about the first pivot pin when there is relative motion between the blade and the tube.
10. The surgical instrument of claim 7, further comprising a second pivot pin located within a hole defined by the clamp arm and operatively coupled therewith, wherein the clamp arm pivots about the second pivot pin.
11. The surgical instrument of claim 10, wherein the clamp arm is rotatably attached to the blade.
12. The surgical instrument of 11, wherein the clamp arm is rotatably attached to the blade by attaching the clamp arm at a proximal node of the blade or a distal node of the waveguide to minimize interference of the acoustical train.
13. The surgical instrument of claim 12, wherein the clamp arm is rotatably attached to the blade by a through hole and insulated pivot pin attached to the movable clamp arm.
14. The surgical instrument of claim 13, wherein the cam surface define in the tube locates the second pivot pin attached to the movable clamp arm such that the movable clamp arm rotates about the first pivot at pin located in the blade when there is relative motion between the blade and the tube.
15. A surgical instrument, comprising:
- a waveguide comprising a proximal end and a distal end, wherein the proximal end is configured to couple to a transducer;
- an end effector comprising an ultrasonic blade defining a hole to receive a first pivot pin and a movable clamp arm operatively coupled movable about the hole;
- a first pivot pin disposed within the hole; and
- a linkage operatively coupled to the clamp arm and the first pivot pin, wherein the linkage is actuatable to move the clamp arm.
16. The surgical instrument of claim 15, comprising a tube coupled to the linkage to actuate the clamp arm from a first position to a second position through relative motion between the tube and the blade.
17. The surgical instrument of claim 15, wherein the linkage comprises multiple bars.
18. The surgical instrument of claim 15, wherein the linkage is pinned to the blade.
19. The surgical instrument of claim 15, wherein the pivot pin is located either at a proximal node of the blade or a distal node of the waveguide to minimize interference of the acoustical train.
20. The surgical instrument of claim 15, wherein the linkage enables the clamp arm to rotate as the tube is displaced longitudinally.
21. An ultrasonic energy driven rongeur device, comprising:
- at least one elongate member;
- a linkage connected to a distal end of the at least one elongate member;
- an ultrasonic transducer coupled to the at least one elongate member; and
- a pivot located at an ultrasonic node of the at least one elongate member.
22. The ultrasonic energy driven rongeur device of claim 21, comprising:
- a second linkage connected to a proximal end of the at least one elongate member; and
- a second pivot located at a second ultrasonic of the at least one elongate member.
23. The ultrasonic energy driven rongeur device of claim 21, comprising:
- a second elongate member above the at least one elongate member; and
- a damping material disposed between the least one elongate member and the second elongate member.
Type: Application
Filed: Feb 20, 2015
Publication Date: Jun 18, 2015
Inventors: Kevin D. Felder (Cincinnati, OH), Jacob S. Gee (Cincinnati, OH), Brian E. Keyt (Ann Arbor, MI), Robert J. Laird (Morrow, OH), Amy L. Marcotte (Mason, OH), Jeffrey D. Messerly (Cincinnati, OH), Emily H. Monroe (Cincinnati, OH), Daniel W. Price (Loveland, OH), Patrick J. Scoggins (Loveland, OH), Foster B. Stulen (Mason, OH), John A. Weed, III (Monroe, OH), William B. Weisenburgh, II (Maineville, OH), John W. Willis (Cincinnati, OH)
Application Number: 14/627,778
