Abstract: The present invention provides a treatment apparatus for an endoscope, an endoscope, and an expandable frame. The treatment apparatus for an endoscope includes: a first electrode, including an electrical treatment part and an operating wire; a second electrode, provided inside the endoscope, and including a first electrically conductive part and a sliding contact part electrically connected to the first electrically conductive part, the first electrically conductive part being configured to contact a human body; and a sheath, provided on a surface thereof with a second electrically conductive part, where the operating wire is configured to be passed through the sheath, the sheath is configured to be passed through the endoscope, and when the sheath is located in a preset position, the sliding contact part contacts and is electrically connected to the second electrically conductive part and the sheath is in sliding fit with the sliding contact part.

Abstract: A papillotome for percutaneous endoscopic gastrostomy including a front opening located in a free end region of a catheter and at the outlet of a first lumen, a rear opening further from a free end than the front opening and connects the first lumen to the outside, and a cutting wire located in the first lumen in an axially displaceable manner and extends through the front opening and the rear opening and is located on the outside between the front opening and the rear opening. When the cutting wire is tensioned, the free end region is deformed in an arc shape and the cutting wire forms a transversely extending cutting edge between the front opening and the rear opening. The front opening is arranged at a distance of at least 3 mm from the free end. A projection is formed between the free end and the front opening. A cutting tip is formed at the free end of the catheter. The cutting tip is connected to the cutting wire and forms the foremost end of the papillotome.

Abstract: A multipurpose handle incorporated into a medical device delivery system. The multipurpose handle includes an elongate handle body, an actuation button, and a locking member. The elongate handle body has a proximal end extending to a distal end, which defines a longitudinal axis. The elongate body further includes a cutout that creates a movement space therein in which the actuation button is disposed and is connected to a medical device. The actuation button is movable within the cutout along the longitudinal axis and rotatable within the cutout. The locking member is connected to the elongate handle body and movable between a locked position and unlocked position. The locking member may be in contact with the actuation button and be configured to restrict the movement of the actuation button along the longitudinal axis when in the locked position.

Abstract: The present disclosure provides an adjustable endoscopic surgical device for illuminating a tissue surface with diffuse and oblique light. In some embodiments, light emanates from the sides of an optical fiber, which is optionally formed at least in part into a loop shape.

Abstract: The present subject matter discloses a tissue removal tool for use with an endoscope. The tool comprises a loop formed by a piece of wire and movable between an open position and a closed position, and a transmitting assembly comprising: a handle; and a link having a first end attached to the handle and a second end attached to the loop, the loop portion being movable between the open and closed position by action of the handle. The loop is defined in the open position by a proximal portion and a distal portion. The widest portion of the loop is more proximal to a proximal end of the loop than the mid-point of the length of the loop is.

Abstract: A conductive coating may be adhered to a structure comprising a hydrophobic and/or adhesion-resistant surface. The conductive coating may have a polymer backbone with conductive particles suspended in the backbone. In some embodiments, the conductive coating may be applied directly to the surface. In other embodiments, the conductive coating may be indirectly applied by first applying a primer adhesive to the outer surface, and then applying the conductive coating over the primer adhesive. An example structure may be a catheter of an endoscopic medical device, such as a bipolar sphincterotome, where the conductive coating functions as a return electrode.

Abstract: The invention relates to a control element for an endoscopic device (A) with a retainer; at least one control wire, which can be moved back and forth in the longitudinal direction of the wire, for control purposes on the endoscopic device (A); a control wire tensioning element guided in the retainer, wherein the control wire is mounted in the control wire tensioning element; and a displacement force application device supported on the retainer, by means of the displacement force application device the control wire tensioning element can be moved relative to the retainer, in order to effect fine adjustment of the control wire.

Abstract: Closure devices and methods are provided for ligating tissue, such as the left atrial appendage. Generally, the closure devices include an elongate body, a snare loop assembly comprising a snare and a suture loop, and a shuttle connected to the snare and releasably coupled to the elongate body and retractable therein. In some variations, the shuttle may be configured to fit into the lumen. In other variations, a handle may be attached to the elongate body, and the handle may comprise a track and a snare control coupled to the track. The handle may be configured to release the shuttle from the elongate body and allow movement of the snare control along the track to retract the snare loop and the shuttle into a lumen of the elongate body.

Abstract: Embodiments of the present invention encompass systems and methods for delivering ligatures to anatomical features of a patient. Exemplary ligature delivery systems for use in delivering a ligature to a left atrial appendage ligature include an elongate support mechanism having a proximal portion and a distal portion, a flexible hoop assembly, and a cinchable constriction member. The flexible hoop assembly can be coupled with the distal portion of the elongate support mechanism, and can include a support body coupled with a support frame. The support frame can be biased to hold the support body in a trailing configuration, whereby a free portion of the support body is disposed proximal to the distal portion of the elongate support mechanism. The support frame of the flexible hoop assembly can be coupled with the distal portion of the elongate support mechanism. The support body can be configured to support the cinchable constriction member and a loop of the left atrial appendage ligature.

Abstract: Provided is a catheter including a shaft having a distal end and a loop disposed near the distal end and configured to curl around a tissue and receive, via the shaft, energy to denervate at least a portion of the tissue.

Abstract: An endoscope device is provided with: an elongated sheath having an endoscope insertion passage that penetrates therethrough in the longitudinal direction and into which an endoscope is inserted; and a wire that is provided in the sheath and that has a bending portion that bends toward the endoscope insertion passage, wherein the wire has a deforming region that is provided in a distal end portion of the sheath and that deforms between a normal form, in which the deforming region is disposed in the interior of the sheath or along an outer circumferential surface thereof, and a loop-shaped expanded form, in which the bending portion is bended and has a diameter larger than the outer diameter of the sheath.

Abstract: The present disclosure relates generally to catheter devices, including irrigated and non-irrigated ablation catheters. More specifically, this disclosure relates to irrigated ablation catheters including an irrigation lumen having at least one electronic device at least partially disposed therein. In many embodiments, the irrigation lumen further includes at least one sideport. In some embodiments, the electronic device has a distal end extending out of the irrigation lumen and into an electrode tip assembly. In some embodiments, a proximal end of the electronic device extends through the sideport in the irrigation lumen.

Abstract: A polypectomy snare comprising two snare parts has a snare part that is completely electrically insulated and another snare part that is not electrically insulated in at least one distal portion thereof. The snare furthermore has at least one electrically insulated, HF surgically inactive skid at its distal end.

Abstract: An endoscopic treatment tool comprises an elongated sheath and an elongated portion configured to be inserted in the elongated sheath and capable of being movable back and forth in directions. A loop portion is disposed on a distal end of the elongated portion and is constructed of a wire folded to form into a loop. The loop portion includes a first bent portion, a pair of second bent portions, a pair of third bent portions, and a fourth bent portion all of which are integrally formed from a distal end toward a proximal end of the loop portion. A first length that represents a length from the first bent portion to the fourth bent portion in the directions along the longitudinal axis ranges from one and half times to two times a first width that represents a maximum dimension of the loop portion in directions perpendicular to the longitudinal axis.

Abstract: A device to assist with the ease and sterility of insertion of catheters and other elongate, flexible medical devices is disclosed. It includes two one-way valves that may be reciprocated with respect to each other. Some variations may include a demount gap which may be continuously opened or may be controllable opened and closed.

Abstract: This disclosure is directed to a method for providing electrical communication with a heart using a catheter having a lasso electrode assembly with a moveable spine. The lasso electrode assembly may have an array of sensing electrodes and may be configured to engage the ostium of the vessel of a patient. The moveable spine may have an ablation electrode and may travel along track around the circumference of the lasso electrode assembly. By adjusting the position of the moveable spine, tissue may be ablated to form lesions around a circumference of the vessel.

Abstract: An electrosurgical device includes a needle with an interior surface defining a lumen and a first electrode positioned within the lumen of the needle in a first position. The first electrode is movable within the needle between the first position and a plurality of other positions. The first electrode extends beyond a distal end of the needle in the plurality of other positions and includes one or more anchors that pierce into a predetermined portion of tissue in an anatomy of a patient. The first electrode is energized to ablate the predetermined portion of tissue with the first electrode.

Abstract: Described herein are drive systems and methods. One exemplary system includes a tool having a proximal handle and a catheter body. The tool can be mated with a rail and the rail mated with a frame. The connection between the tool and rail and/or the rail and frame can allow relative movement of the tool with respect to the frame, a patient, and/or a point of reference. In one exemplary configuration the handle of the tool rotates around an axis that corresponds to a portion of the catheter body, such that rotational movement of the handle has a minimal impact on longitudinal movement and/or position of a distal end of the tool.

Abstract: Disclosed herein is a delivery system for delivering a leadless pacemaker. The delivery system may include a catheter, which may be a guide catheter. The catheter includes a distal end, a proximal end opposite the distal end, a lumen extending between the distal end and the proximal end, and a locking hub operably coupled to the proximal end. The locking hub includes a lumen segment of the lumen. In one implementation, self-biasing of the lumen segment places the lumen segment out of alignment with a rest of the lumen. Deflecting the lumen segment against the self-biasing of the lumen segment places the lumen segment in coaxial alignment with the rest of the lumen. In another implementation, self-biasing of the lumen segment reduces an inner diameter of the lumen segment and actuation of the locking hub expands the inner diameter.

Abstract: Extraction devices for extracting chronically implanted devices such as leadless cardiac pacemakers (LCP). In some cases, the extraction devices may be configured to cut or tear through at least some of the tissue ingrowth around and/or over the chronically implanted device such that a retrieval feature on the chronically implanted device may be grasped for removal of the chronically implanted device.

Abstract: A device and system for removing polyps is provided and includes a tubular member having proximal and distal ends, a snare portion operably extending from within the distal end of the tubular member, the snare portion including a cutting member for severing the sealed tissue. The polyp removal device may further include a handle portion operatively extending from within the proximal end of the tubular member. The handle portion may be configured for operable engagement by a user and the cutting member may extend between distal ends of the first and second electrodes.

Abstract: An electrosurgical snare, e.g. suitably sized for insertion down the instrument channel of an endoscope, arranged to radiate microwave frequency energy (e.g. having a frequency greater than 1 GHz) from an elongate conductive element within an area encircled by a retractable loop. The elongate conductive element and retractable loop may be independently slidable relative to a snare base at a distal end of a sleeve to provide an appropriate device configuration. By controlling the shape of the emitted microwave field, the risk of collateral thermal damage can be reduced.

Abstract: The present disclosure provides an adjustable endoscopic surgical device for illuminating a tissue surface with diffuse and oblique light. In some embodiments, light emanates from the sides of an optical fiber, which is optionally formed at least in part into a loop shape.

Abstract: The invention generally relates to a tissue ablation system including an ablation device to be delivered to a target site and achieve both resection and coagulation of tissue. The ablation device can be used during an electrosurgical resection procedure to both resect tissue and further selectively coagulate surrounding tissue in the resection site so as to prevent or stop fluid accumulation (e.g., blood from vessel(s)) as a result of the resection of tissue.

Abstract: Embodiments of the invention are directed to a method of excising tissue including injecting fluid into the submucosa to raise targeted tissue. A first electrode is positioned below the targeted tissue within the injected fluid and a second electrode is positioned adjacent a surface of the raised targeted tissue opposite the first electrode. Electrical current is applied between the first and second electrodes and the targeted tissue is excised with the second electrode.

Abstract: Various surgical devices are provided having mechanisms for preventing premature actuation of a cutting mechanism. These devices generally include a handle having one or more actuators and an effector disposed at a distal end of the device and configured to grasp tissue. When the end effector is in an open position, a firing actuator can be positioned so that it cannot be actuated by a user. For example, the firing actuator can be obstructed by a shield or arm when the end effector is in the open position. In other embodiments, the firing actuator can be hidden in a recess formed in the closure actuator until the end effector is moved to the closed position. When the end effector is in the closed position, the firing actuator can be engaged to advance a cutting mechanism, thereby cutting the tissue grasped by the end effector.

Abstract: A method of disassembling a surgical instrument includes obtaining a surgical instrument including a housing, an input shaft defining an axis and extending from the housing, and a paddle engaged with the input shaft and configured to pivot about the axis. The method further includes disengaging a cover plate of the paddle from a body of the paddle by providing a force to the cover plate substantially in a direction parallel to the axis and disengaging the body from the input shaft by providing a force to the body substantially in a direction parallel to the axis.

Abstract: A catheter assembly provided with a wire arranged therein to form a loop extending from near the effective end of the catheter for bypassing an occlusion in a vein/artery. This loop consists of two wire ends, one of which wire ends extends through the catheter to the control end thereof, while the other wire end is attached thereto, in close proximity to the effective end of the catheter. By varying the relative position of the loop wire end extending from the control end and the control end, the size of the loop and the pushability thereof at the effective end of the catheter can be determined. In this manner, the occlusion can be removed with precise control by the physician using two hands. In addition, the catheter is formed not only for the loop wire end extending through the catheter, but also for incorporating a guide wire and/or for contrast fluids.

Abstract: An endoscopic cap assembly may include a sleeve and a cap. The cap may include a cap channel extending along an external surface of the cap. The cap may also include an engagement feature extending radially outwardly from the external surface of the cap.

Abstract: The present subject matter provides improvements of endoscopic retrieving devices. In specific, the present subject matter provides a net element with an extra wide tail section. The present subject matter provides a new weaving pattern. The present subject matter provides a new shape of the loop. The present subject matter provides a net with a combination of net elements, such as combinations of different net geometries and/or different net materials. The present subject matter provides a new and inventive loop. The present subject matter provides an improved second end of the tubular member. The present subject matter provides a new and inventive arm.

Abstract: A snare and retrieval device including a handle section, a cord section attached to the handle section, and a tip section removably attached to the cord section and spaced away from the handle section. Such a tip section is selectively detachable from the cord section while the cord section remains attached to the handle section. The tip section is detachable thereby allowing a surgeon to easily change the snare tip to a bigger or smaller size as necessary during the operation. A user can use one cord section for both removal of a polyp followed by retrieval of the polyp for further examination. This is done by changing the snare member to a retrieval member. The detachability of the tip section allows the device to replace at least two or more separate snare and retrieval devices, thereby reducing cost and time during the operation.

Abstract: A method and apparatus are disclosed for a needle for gaining access to the pericardial cavity of a heart. The needle includes an elongate member (e.g. a main shaft) defining a lumen and a side-port in communication with the lumen; a blunt atraumatic tip for delivering energy for puncturing tissue; and a guiding surface (e.g. a ramp) for directing a device (e.g. a guidewire) through the side-port. The method includes using the needle for tenting a pericardium and delivering energy for puncturing the pericardium, and advancing a guidewire or other device through the needle and into the pericardial cavity.

Abstract: A minimally invasive surgical assembly broadly includes an outer hollow needle which has an outer diameter, a longitudinal axis, and a sharp distal end. An insulating member extends through the hollow needle and is movable relative to the hollow needle. An elongated member extends through the insulating member and is movable relative to both the insulating member and the hollow needle. A resilient wire projects from the elongated member and is retractable within and extendable outside of the insulating member and the hollow needle. The insulating member, elongated member, and resilient wire are movable relative to the needle using first and second moving means whereby the surgical assembly assumes various configurations having different operational functions.

Abstract: This disclosure is directed to a catheter having a lasso electrode assembly with a movable spine. The lasso electrode assembly may have an array of sensing electrodes and may be configured to engage the ostium of the vessel of a patient. The movable spine may have an ablation electrode and may travel along track around the circumference of the lasso electrode assembly. By adjusting the position of the movable spine, tissue may be ablated to form lesions around a circumference of the vessel.

Abstract: The preferred embodiment provides apparatus for ablating a vessel by generating heat within a vessel to cause blood clotting to occlude the vessel. The apparatus includes an electrically resistive element at the distal end of the apparatus, the resistive element being uncoated and therefore in bare form. An alternating current supply feeds electrical current through the resistive element to cause heating of the element and surrounding blood or tissue. The alternating current power supply preferably is balanced about a centre point so as to create a net sum of alternating pulses of zero. It has been found that the supply of alternating current to the resistive element reduces or eliminates corrosion of the resistive element in blood as the resistive element is heated. Use of conductive coatings for a sacrificial anode can be avoided.

Abstract: The present subject matter discloses a tissue removal tool for use with an endoscope. The tool comprises a loop formed by a piece of wire and movable between an open position and a closed position, and a transmitting assembly comprising: a handle; and a link having a first end attached to the handle and a second end attached to the loop, the loop portion being movable between the open and closed position by action of the handle. The loop is defined in the open position by a proximal portion and a distal portion. The widest portion of the loop is more proximal to a proximal end of the loop than the mid-point of the length of the loop is.

Abstract: Exemplary medical devices may include a snare device. The snare device may include a first leg having a proximalmost end and a second leg having a proximalmost end. The first leg and the second leg may form a distal loop. The proximalmost end of first leg may be independently moveable relative to the proximalmost end of the second leg.

Abstract: A surgical snare comprising a means of delivering thermal plasma on to biological tissue encircled by the snare. The snare may be “cold” snare, i.e. formed from insulating material, or active, i.e. connected to receive RF and/or microwave energy to be radiated into the area encircled by the snare. The surgical snare may thus deliver into biological tissue encircled by a retractable loop any one of (i) a plasma to perform surface coagulation, (ii) a non-ionising microwave field (in the absence of plasma) to perform coagulation at a deeper level, and (iii) an RF field to assist with cutting.

Abstract: The invention relates to a papillotome for percutaneous endoscopic gastrostomy comprising a front opening (11), which is located in a free end region of a catheter (10) and at the outlet of a first lumen (12), a rear opening (9), which is further from a free end (17) than the front opening (11) is and which connects the first lumen (12) to the outside, and a cutting wire (16), which is located in the first lumen (12) in an axially displaceable manner and extends through the front opening (11) and the rear opening (9) and is located on the outside between the front opening (11) and the rear opening (9). When the cutting wire (16) is tensioned, the free end region is deformed in a arc shape and the cutting wire (16) forms a transversely extending cutting edge (15) between the front opening (11) and the rear opening (9). The front opening (11) is arranged at a distance of at least 3 mm from the free end (17). A projection (20) is formed between the free end (17) and the front opening (11).

Abstract: A tissue cutting device includes a flexible elongate body including a channel extending therethrough, a distal member connected to a distal end of the elongate body. The distal member includes a lumen extending therethrough in communication with the channel and a recess extending through an exterior surface of the distal member along a portion of a length thereof. The recess extends includes a receiving structure at a distal end thereof. A cutting element is slidably received within the channel and the lumen so that the cutting element is movable between an open tissue-receiving configuration and a closed tissue-gripping configuration, in which a distal portion of the cutting element extends across the recess such that the distal end of the cutting element is received within the receiving structure, a portion of a length of the distal portion extending radially beyond an exterior surface of the distal member.

Abstract: An electrosurgical snare may include a conductive distal loop that includes an uninsulated thinner portion and an uninsulated thicker portion. Respective current densities over the outer surfaces of the thinner and thicker portions may cause the uninsulated thinner portion to immediately begin cutting tissue, while the uninsulated thicker portion may initially begin coagulating the tissue.

Abstract: An ophthalmic surgical instrument includes a housing and a snare operably coupled to the housing. The snare is configured to transition between an insertion configuration and a deployed configuration, in which the snare is sized to encircle lenticular tissue. The ophthalmic surgical instrument is designed to prevent elevation and/or tilting of the lenticular tissue as the snare transitions toward the insertion configuration to divide the lenticular tissue.

Abstract: A surgical device and procedure are provided for performing microsurgery, including a capsulotomy of a lens capsule of an eye. The device has an elastically deformable cutting element mounted within an elastomeric suction cup. The suction cup is attached to an arm for manipulating the device. The device can be inserted into the anterior chamber of the eye, through a corneal incision, to cut a piece from the anterior portion of the lens capsule of the eye. The device is secured against the lens capsule using suction applied by one or more suction elements. The device is then removed from the eye, with the cut piece of membrane retained within the device by suction.

Abstract: The present disclosure provides an adjustable endoscopic surgical device for illuminating a tissue surface with diffuse and oblique light. In some embodiments, light emanates from the sides of an optical fiber, which is optionally formed at least in part into a loop shape.

Abstract: A treatment tool for an endoscope includes a sheath which is extended along a longitudinal axis; a pre-curved portion which is disposed at a distal portion of the sheath; a knife wire lumen which is formed along the longitudinal axis of the sheath; a first communication hole and a second communication hole which are open on an outer circumferential surface to communicate the outer circumferential surface positioned with the knife wire lumen; a wire-shaped cutting portion which is protruded from the first communication hole and the second communication hole, and is extended in a position spaced from the outer circumferential surface and the virtual plane; a fixing portion which is provided to fix an end portion of a wire connected to the cutting portion inside the knife wire lumen, and a bending portion which is provided to bend the wire.

Abstract: Described are surgical cutting tools and related methods, useful to sever tissue, optionally cauterizing the tissue; the cutting tool includes a frame that can be extended and retracted at the distal end of the cutting tool such that the frame supports a cutting element useful to cut tissue.

Abstract: A dual-purpose surgical bougie is disclosed for vertical sleeve gastrectomy (VSG) procedures, and other related operations, that can serve the purpose of both operating as a guide or dilator for stapling and resecting a stomach and also securing, containing, and trans-orally extracting the resected stomach, thereby promoting faster patient recovery, minimizing and reducing the size and number of incisions, and further minimizing VSG procedure related complications, among other advantages. In one aspect of the disclosure described herein, the dual-purpose medical device can include a surgical bougie having a distal end and a proximal end, wherein the bougie can be made of at least one of rubber, silicone, plastic, and metal. In addition, the bougie can include a channel or passage disposed within its central axis extending from its distal end to the proximal end, and a securement member coupled to the bougie.

Abstract: A medical device including an energy generator, a proximal end, and a distal end. The proximal end may include a handle and one or more connectors coupled to the energy generator. The distal end may include a number of movable branch members connected to one or more movable filaments at the distal end to form at least one expandable snare. At least one of the one or more movable filaments may be coupled to the one or more connectors to transfer energy to the at least one of the one or more movable filaments. A portion of the at least one of the one or more movable filaments forming the at least one expandable snare may be insulated.

Abstract: A device and system for removing polyps is provided and includes a tubular member having proximal and distal ends, a snare portion operably extending from within the distal end of the tubular member, the snare portion including a cutting member for severing the sealed tissue. The polyp removal device may further include a handle portion operatively extending from within the proximal end of the tubular member. The handle portion may be configured for operable engagement by a user and the cutting member may extend between distal ends of the first and second electrodes.

Abstract: Bipolar electrosurgical devices may include a handle assembly configured to control movement of components of the electrosurgical device to perform an electrosurgical procedure and a power cord assembly configured to electrically connect the bipolar electrosurgical device with a power source. For bipolar sphincterotomes, an active portion of the handle assembly may include a first active member that contacts and slides across a second active member as the gripping portion moves about a handle stem component of the handle assembly. The power cord assembly may include a pair of return contacts that are shorted together when connected with the handle assembly, which in turn may deactivate an alarm output by the power source.