Abstract: A method for increasing accuracy of positioning an X-ray device relative to an examination subject using a camera system includes recording a first data set, acquiring original positioning information pertaining to the X-ray device and specifying a target position of the X-ray device relative to the original position. The X-ray device is positioned out of the original position into a first approach position using the original positioning information, and a second data set is recorded. A deviation between the target position and the first approach position is determined by a reconciliation between the first data set and the second data set. The X-ray device is positioned out of the first approach position into a second approach position using the determined deviation.

Abstract: A system for recording chest signals of a user, the system including: a sensing unit including a first sensor configured for recording a chest signal from the chest of the user; a remote control device connectable with the sensing unit and configured for generating guiding information including a recording procedure to follow when performing the recording; a processing unit for processing the chest signal such as to determine a confidence criterion of the chest acoustic signal. The remote control device is further configured for generating instructional information comprising information about the determined confidence criterion, and includes an interface allowing the user, or an assistant performing the recording on the user, to initiate and/or stop the recording or initiate a further analysis of the processed chest signal. A method for recording the chest signals of a user uses the system.

Abstract: An ultrasonic endoscope system includes an ultrasonic endoscope and an ultrasonic endoscope apparatus, in which the ultrasound observation apparatus includes a B-mode image generator that generates, on the basis of an ultrasound signal acquired by the ultrasonic endoscope, a B-mode image obtained by converting an amplitude of the ultrasound signal into a brightness; a region-of-interest setting unit that sets a region of interest ROI in the B-mode image; a blood flow image generator that generates a blood flow image of the region of interest ROI on the basis of the ultrasound signal; and an image display part that is capable of displaying the B-mode image or a composite image of the B-mode image and the blood flow image, and the region-of-interest setting unit recognizes a procedure performed using the ultrasonic endoscope and sets the region of interest ROI in accordance with the recognized procedure.

Abstract: A control device including: a breast thickness acquisition unit that acquires a thickness of a breast in a pressed state by a pressing member; a depth information acquisition unit that, in a case where an ultrasound image of the breast in the pressed state is captured, acquires depth information indicating a depth to which imaging by an ultrasonography apparatus which captures the ultrasound image is possible; a deriving unit that derives imaging information indicating whether or not capture of an ultrasound image having predetermined accuracy or higher is possible by the ultrasonography apparatus on the basis of the thickness of the breast acquired by the breast thickness acquisition unit and the depth information acquired by the depth information acquisition unit; and an output unit that outputs the imaging information derived by the deriving unit.

Abstract: An imaging member including: a pressing member that presses a breast of a subject; and an ultrasonography member that has a first surface on which an acoustic matching member having fluidity is provided, and is provided such that a second surface on a side opposite to the first surface is provided on a surface of the pressing member, which is on a side opposite to a surface that comes into contact with the breast, via a coupling material having lower fluidity than the acoustic matching member.

Abstract: An ultrasound scanning guidance method includes acquiring an image by an ultrasound probe of a target organ during an ultrasound scanning procedure. The acquired image corresponds to a pose of the target organ in an acquired scan plane. The method further includes processing the image by a guidance unit to determine an anatomical context around the target organ based on the acquired image. The processing the image also includes determining a relative location of the acquired scan plane with reference to a standard scan plane based on the pose of the target organ and the anatomical context. The processing further includes generating scanning guidance based on the relative location of the acquired scan plane. The scanning guidance includes information to move the probe towards a standard pose of the target organ. The method also includes presenting the scanning guidance by an output device for aiding continuance of the scanning procedure.

Abstract: The present invention relates to an ultrasound imaging system comprising an ultrasound image acquisition station and a mobile display device. When disconnected from the ultrasound image acquisition station, the mobile display device may be operated by its own operating system providing general purpose applications to a user. When connected to the ultrasound image acquisition station, the hardware of the mobile display device is operated by an ultrasound application dedicated operating system stored on the ultrasound image acquisition station. By this, a low weight and flexible to use ultrasound imaging system may be provided.

Abstract: The invention relates to a method for controlling an ultrasound system comprising at least two ultrasound sensor units using gestures. The method comprises: detecting a gesture on a first ultrasound sensor unit; matching the detected gesture to one of the plurality of gestures in the gestures database; reading the assigned at least one system function in the gesture database related to the detected gesture; and activating the at least one system function. At least one system function includes switching a sound source from a second ultrasound sensor unit to said first ultrasound sensor unit and wherein the gesture assigned to this system function comprises a double-tap on the surface of the first ultrasound sensor unit. Further, the invention relates to a system for carrying out the method.

Abstract: A contrast element tracking method comprises obtaining a sequence of frames each comprising ultrasound or other medical imaging data representing an anatomical region of a human or animal subject at a respective different time; for each frame, identifying one or more portions of the ultrasound or other medical imaging data as single or multiple contrast element signal portions representative of a contrast element or plurality of contrast elements; assigning respective position data to each of the single contrast element signal portions and each of the multiple contrast element signal portions; and using a linking model that uses at least said assigned position data to link single or multiple contrast element signal portions represented in at least one of the frames to single or multiple contrast element signal portions represented in at least one other of the frames thereby to track movement of contrast elements through said region of the subject.

Abstract: A transducer array includes at least one annular shear wave generation transducer that defines an interior area, the at least one annular shear wave generation transducer being configured to generate a shear wave excitation to a region of interest such that the shear wave excitation excites at least a part of a corresponding cylindrical portion of the region of interest and shear waves propagating from the cylindrical portion of the region of interest constructively interfere in an interior region of the cylindrical portion of the region of interest: and at least one tracking transducer positioned in the interior area of the at least one annular shear wave generation transducer, the at least one tracking transducer being configured to detect a shear wave in the interior region of the region of interest.

Abstract: Asymmetry is provided for the pushing pulse in acoustic radiation force impulse (ARFI) imaging. MI is based on the negative pressure. By increasing the positive pressure more than the negative pressure, the magnitude of displacement may be increased without exceeding the MI limit. Similarly, negative voltages depole while positive do not, so using an ARFI or pushing pulse with asymmetric positive-to-negative peak pressures or voltages allows for generation of greater magnitude of displacement without harm to the transducer.

Abstract: A wave guide assembly for a control and diagnostic system for a machine includes a housing defining an exterior surface and an internal cavity extending between distal ends. At least one wave guide within the internal cavity defines a wave propagation passage for at least one wave form signal. At least one conductor within the internal cavity is separate from the wave guide. A control and diagnostic system for a machine and a gas turbine engine are also disclosed.

Abstract: To correctly trace a target component even when a folded component is included in a Doppler waveform. The Doppler waveform is configured by a plurality of luminance distributions 54 arranged on a time axis. In each luminance distribution 54, a minimum luminance value located in the trough portion 54c between the target portion 54a and the folded portion 54b is specified. A search start point Pn is set based on the minimum luminance value. A trace point 60 is specified by searching from the search start point Pn to a base line 61 side.

Abstract: Enhanced ultrasound imaging apparatus and associated methods of work flow are disclosed herein. In one embodiment, a method of ultrasound scanning includes receiving a first dataset representing ultrasonic scanning of a target anatomy of a patient in a two-dimensional mode and generating a two-dimensional ultrasound image of the scanned target anatomy based on the received first dataset. The method also includes accepting a definition of at least one of a sagittal plane, a transverse plane, and a coronal plane on the displayed two-dimensional ultrasound image. Thereafter, a second dataset representing ultrasonic scanning of the target anatomy in a three-dimensional mode is received and an ultrasound image at the coronal plane of the target anatomy is generated based on (1) the three-dimensional scanning and (2) the accepted definition of at least one of the sagittal plane, the transverse plane, and the coronal plane.

Abstract: A tracheal model reconstruction method using the ultrasonic and deep-learning techniques; which comprises the following steps: obtaining the image and position information of the tracheal wall, positioning the graph-information space, processing image, extracting the image-feature and recognizing the image using deep-learning, positioning the 6 DoF space, calibrating the image-space, converting the image-space, and forming a three-dimensional trachea model. Thereby, providing a tracheal model reconstruction method that can correctly and quickly reconstruct and record a stereoscopic three-dimensional tracheal model.

Abstract: A tracheal model reconstruction method using the computer-vision and deep-learning techniques; which comprises the following steps: obtaining an image of the tracheal wall, loading the graph-information, processing the image, extracting the image-feature, comparing the image, estimating the position-pose and converting the spatial-information, and reconstructing a three-dimensional trachea model. Thereby, providing a tracheal model reconstruction method that can correctly and quickly reconstruct and record a stereoscopic three-dimensional tracheal model.

Abstract: Provided is an ultrasound imaging system configured to generate data of an ultrasound image based on an echo signal received by each of a plurality of elements included in an ultrasound transducer, the ultrasound imaging system includes: a determining circuit configured to determine, using a signal corresponding to the echo signal obtained by receiving from each of the plurality of elements, concerning the elements, whether a decrease in reception sensitivity occurs; and a control circuit configured to cause, based on a position of an element where the determining circuit determines that the decrease in the reception sensitivity occurs, a display to display at least one of display data indicating an image region where sensitivity decreases in the ultrasound image and information for informing that a sensitivity decreased element in which a decrease in reception sensitivity occurs is present.

Abstract: A gas collection and analysis system for detecting microbiomes is described. The system includes a waste disposal site, a sorbent cartridge coupled adjacent to the waste disposal site, wherein the sorbent cartridge includes a sorbent media configured to absorb a gas sample from within the waste disposal site, a sorbent heating block configured to heat the sorbent cartridge and release the gas sample absorbed by the sorbent media, and a pumping system coupling the sorbent cartridge to an ionized gas analyzer mass spectrometer, the pumping system configured to direct the flow of the released gas sample from the sorbent media to the gas analyzer mass spectrometer for chemical analysis. Methods for detecting microbiomes of a user are also described herein.

Abstract: A sample collection device including a collection tube at least partially defining a storage volume therein, a mouthpiece coupled to the collection tube, the mouthpiece defining a channel providing access to the storage volume, and a filter at least partially positioned within the channel, where the filter is configured to filter a sample as it passes through the channel and into the storage volume.

Abstract: A device (10) for collecting a sample from a uterus (14). The device includes a core (24) defining a core outer surface (28) and a distal brush section (30) provided with brush bristles (32) extending from the core outer surface (28). A sheath (26) receives at least part of the core (24) thereinto and defines axially opposed sheath proximal and distal ends (34 and 36). The core (24) and sheath (26) are movable relative to each other between a device retracted configuration and a device expanded configuration, wherein, in the device retracted configuration, the brush bristles (32) are compressively contained within the sheath (26) in a brush bristle compressed configuration, and, in the device expanded configuration, the brush bristles (32) are outside the sheath (26), distally to the sheath distal end (36), in a brush bristle expanded configuration wherein the brush bristles (32) span a larger volume than in brush bristle compressed configuration.

Abstract: The adapter includes: a base body that includes a first surface attached to a robot arm, and a second surface to which a surgical instrument is attached; an engaging portion that engages with the robot arm at an advanced position corresponding to an opening of the first surface; an urging member that urges the engaging portion in a direction from a retracted position to the advanced position; an operation portion connected to the engaging portion to shift the engaging portion to the retracted position while resisting an urging force of the urging member; and a stopper that stops the operation portion to prevent a shift of the engaging portion from the retracted position to the advanced position.

Abstract: An improved system for attaching devices to the distal end of endoscopic instruments is described. An attachment adapter comprises a distal stop, such as a complete or partial loop or cylinder, which limits the penetration of an endoscope into the adapter. The adapter has at least one flange protruding proximally along the endoscope. The adapter is secured on the endoscope by a securing means, which compresses the flange or flanges sufficiently to provide a friction fit. The flexibility of the inventive adapter system allows the adapter to work reliably with endoscopes that are used, damaged or repaired. The adapter may further provide a slit or window allowing viewing of the vessel wall by a lens on an endoscope, thereby improving the operator's ability to understand the location of the endoscope during operation. The adapter may carry any of a variety of devices, including devices for closing a surgical incision, or treating or manipulating tissue.

Abstract: A retractor system and related methods for use in spinal surgery procedures, including but not limited to fusing or repairing damaged or deteriorated intervertebral discs or vertebral bodies in the lower lumbar levels. The retractor system includes a plurality of blade assemblies coupled to a handle assembly, wherein each of the blade assemblies may be independently adjusted (e.g. length blade and/or blade angulation and/or blade rotation relative to the handle assembly) to provide unprecedented customization of an operative corridor extending to the surgical target site of the patient such that any number of spinal surgery procedures may be undertaken by a surgeon, including but not limited to spinal fusion procedures at the L5-81 disc space.

Abstract: A surgical retractor for retracting body tissue in a therapeutic procedure includes a blade having a body portion and a plurality of elongate elements extending from the body portion. The plurality of elongate elements is separated a distance from one another along a length of the body portion and form one or more gaps therebetween. The plurality of elongate elements is connected by one or more cross connectors transverse to the plurality of elongate elements. The retractor blade is configured to permit movement of a lung being retracted.

Abstract: An illuminated surgical retractor that has at least two retractor blades such as elongated retractor blades connected to a handle in a manner that allows the blades to fan out from each other is disclosed. The source of illumination is directly connected to the apparatus either removably or permanently. The source of illumination may be attached to the handle or the retractor blades in several alternate embodiments.

Abstract: A length or strand of resilient material is formed into a continuous ring having multiple tissue-engaging portions for engaging and spreading eyeball tissue segments apart. The strand is formed with elongated straight sides joined by corner portions which are enlarged in directions transverse to the length dimension of each adjacent side. The corner portions constitute the tissue-engaging portions and have top and bottom sections and a connecting section that forms a gap for receiving the tissue. Each side of the ring extends from a bottom section of one corner to a top section of an adjacent corner. When the ring is deployed, the tissue is captured in the gaps at the corners of the ring and also is engaged along each side as that side transitions from a position situated below the tissue to a position situated above the issue.

Abstract: An eyelid speculum, a kit containing the eyelid speculum, and a method of using the eyelid speculum in the diagnosis and/or treatment of a patient are provided. The eyelid speculum includes a central ring having an upper surface, a lower surface, an inner side surface, an outer side surface, a first end, and a second end. The first end and the second end are separated by a gap, and the central ring defines an opening. The eyelid speculum also includes first and second eyelid margin holders that extend outwardly from the outer side surface of the central ring at the first end and second end, respectively, where each eyelid margin holder has an upper portion and a lower portion. In addition, the eyelid speculum includes finger tabs that extend upwardly from the upper portions of the first and second eyelid margin holders.

Abstract: An implantable device for aiding in generating connective tissue between a pair of anatomical structures in a mammalian body is provided. The device includes an elongate, flexible tether which can be secured between the anatomical structures and which carries a scaffold which is generally porous so as to be capable of promoting tissue ingrowth and collagen deposition along its length. The scaffold extends along the tether for a sufficient distance so that it is securable in at least close proximity to an anatomical structure at either end. The pores in the scaffold extend through the scaffold and each has a diameter in the range of about 10 ?m to about 200 ?m. The length of the tether is selected to be a desirable maximum distance between the anatomical structures along a desired path when secured therebetween.

Abstract: The suture device comprises a suture element of elongated shape and intended to be inserted through the flaps of a surgical wound, in which the suture element is made of a shape memory material and has a first pointed extremity adapted to pierce the flaps to allow the passage of the suture element through the latter and their mutual approach to define a suture, and a second extremity opposite the first extremity, and by the fact that the suture element comprises an initial configuration wherein the extremities and the flaps are spaced apart from one another and a final configuration wherein the extremities and the flaps are mutually approached to define the suture.

Abstract: Meniscal repair devices, systems, and methods are provided.

Abstract: A motor-driven surgical cutting and fastening instrument that comprises an end effector, an electric motor, and a motor control circuit. The motor control circuit is for monitoring a parameter of the electric motor that is indicative of movement of a moveable member of the end effector, and for adjustably controlling the electric motor based on the monitored parameter to thereby adjustably control movement of the moveable member of the end effector during forward rotation of the electric motor.

Abstract: A motor-driven surgical cutting and fastening instrument that comprises an end effector, an electric motor, and a motor control circuit. The motor control circuit is for monitoring a parameter of the electric motor that is indicative of movement of a moveable member of the end effector, and for adjustably controlling the electric motor based on the monitored parameter to thereby adjustably control movement of the moveable member of the end effector during forward rotation of the electric motor.

Abstract: A motor-driven surgical cutting and fastening instrument that comprises an end effector, an electric motor, and a motor control circuit. The motor control circuit is for monitoring a parameter of the electric motor that is indicative of movement of a moveable member of the end effector, and for adjustably controlling the electric motor based on the monitored parameter to thereby adjustably control movement of the moveable member of the end effector during forward rotation of the electric motor.

Abstract: A staple cartridge insertable into a surgical stapling instrument is disclosed. The staple cartridge comprises a threaded rod and a firing member configured to move from a proximal unfired position toward a distal position as the threaded rod is rotated in a first direction. The firing member comprises a first portion comprising a first camming member, wherein an anvil of the surgical stapling instrument receives the first portion when the firing member in the proximal unfired position and a second portion comprising a second camming member, wherein a staple cartridge jaw of the surgical stapling instrument receives the second portion when the firing member is in the proximal unfired position, and wherein the first portion and the second portion are configured to maintain a distance between the anvil and the staple cartridge jaw during a staple firing stroke.

Abstract: A surgical stapling device includes an end effector and a handle assembly operably coupled to the end effector. The end effector includes an anvil assembly and a cartridge assembly. The surgical stapling device also includes a specimen bag adhered to both the anvil assembly and the elongated support channel of the cartridge assembly. The specimen bag includes a drawstring within a drawstring housing. Once the surgical stapling device is inserted into a patient's body and the anvil assembly and the cartridge assembly are open, a tissue specimen is placed into the specimen bag. The anvil assembly and the cartridge assembly are then closed on the tissue specimen and the surgical stapling device is fired. The specimen bag then separates from the surgical stapling device and both the surgical stapling device and the specimen bag are removed from the patient.

Abstract: A surgical stapling apparatus includes a handle assembly, an elongate tubular body extending distally from the handle assembly, and an end effector extending distally from the elongate tubular body. The end effector includes a staple cartridge assembly having a tissue facing surface defining retention slots and a central longitudinal slot. The retention slots are disposed in rows along the tissue facing surface, and each of the retention slots has an arcuate shape including a concave surface and a convex surface.

Abstract: A surgical instrument is disclosed. The surgical instrument comprises an elongate shaft comprising a distal end including a concave surface, an end effector assembly comprising a proximal end including a convex surface, wherein the convex surface is received by the concave surface of the elongate shaft, and wherein the convex surface comprises a first slot and a second slot defined therein, and an articulation assembly. The articulation assembly comprises a first articulation driver comprising a distal end including a first ball, wherein the first ball is received by the first slot and a second articulation driver comprising a distal end including a second ball, wherein the second ball is received by the second slot, and wherein the end effector assembly is rotated in a plane with respect to the elongate shaft when at least one of the first articulation driver and the second articulation driver are driven longitudinally.

Abstract: An end effector assembly for use with a surgical instrument is disclosed. The end effector assembly comprises a first jaw defining a channel therein, a second jaw, and a threaded rod extending within the channel. The end effector assembly further comprises a replaceable staple cartridge comprising a sled, wherein the replaceable staple cartridge is configured to be seated in the channel, and a firing member operably engaged with the threaded rod, wherein the sled and the firing member are configured to move from a proximal position toward a distal position when the threaded rod is rotated in a first direction.

Abstract: An end effector assembly for use with a surgical instrument is disclosed. The end effector assembly comprises a staple cartridge jaw, a threaded rod, and a replaceable staple cartridge configured to be seated in the staple cartridge jaw. The replaceable staple cartridge comprises a proximal end, a distal end, a longitudinal slot extending between the proximal end and the distal end, and a driver configured to support a staple, wherein the driver comprises a surface facing the threaded rod, wherein the surface comprises a clearance, and wherein at least a portion of the threaded rod is configured to be received in the clearance when the replaceable staple cartridge is seated in the staple cartridge jaw.

Abstract: A staple cartridge for use with a stapling device that has an actuator that is selectively actuatable in an axial direction and an anvil portion that is selectively movable between open and closed positions is disclosed. Various embodiments of the present invention include a cartridge body that movably supports first and second staple drivers. The staple drivers each support a staple thereon and serve to drive the staples into forming contact with the anvil upon actuation by the actuator. The various embodiments of the present invention enable the final formed heights of the staples to be varied so as to apply various clamping forces and pressures to soft tissue captured within the staples. In at least one embodiment, the staples can include crowns formed thereon which can be utilized to adjust or control the clamping force and/or pressure applied by the staples.

Abstract: Surgical stapler systems can include a jaw assembly with one jaw defining a reload support capable of receiving and firing multiple disposable reload cartridges in a single surgical procedure. The reload cartridge can be protected by a reload cover engageable therewith. The reload cover can include snap features configured to prevent manual removal of the reload cover from the reload cartridge before proper positioning and installation in the reload support. The reload cover can desirably maintain a plurality of staples within staple pockets in the reload cartridge and can maintain a staple deployment mechanism in an unfired position.

Abstract: An end effector includes an anvil and a cartridge. The anvil can include a plurality of staple pockets positioned on an anvil face. The cartridge can be configured to retain a plurality of staples. Each of the plurality of staples includes a first staple leg, a second staple leg, and a crown connecting the first staple leg and the second staple leg, and each has an open staple configuration where the first staple leg and the second staple leg are generally perpendicular to a longitudinal axis of the crown and a closed staple configuration where a first tip of the first staple leg is bent in a first direction away from the longitudinal axis of the crown, and a second tip of the second staple leg is bent in a second direction away from the longitudinal axis of the crown, the first direction being different than the second direction.

Abstract: A fastener cartridge can include, one, a cartridge body comprising a deck and a plurality of fastener cavities and, two, a plurality of fasteners positioned in the fastener cavities. The cartridge body can further comprise extensions extending from the deck having different sizes and/or configurations. The extensions can control the flow of tissue relative to the deck and/or support the fasteners as they are ejected from the fastener cavities.

Abstract: Disclosed embodiments include apparatuses, systems, and methods for facilitating surgical anastomosis. In an illustrative embodiment, an apparatus includes a first connector configured to engage an opening of a donor passage. A second connector is configured to engage an opening in a receiving passage. A separator is configured to support the first connector and the second connector and to fix relative positions of the end of the donor passage to edges of the opening in a receiving passage across a gap. The separator is configured to maintain the gap between the first connector and the second connector while multiple loops of a suture are passed through the edge of the opening in the donor passage and the edges of the opening in the receiving passage. The first connector, the second connector, and the separator are further configured to be removed from between adjacent loops of the multiple loops of the suture.

Abstract: Disclosed embodiments include apparatuses, systems, and methods for driving a needle to facilitate suturing, such as may be performed in a surgical anastomosis procedure. In an illustrative embodiment, an apparatus includes a frame. First and second rollers are rotatably mounted parallel with each other in the frame and are configured to engage therebetween a shaft of a needle formed in a helical shape. The first and second rollers are configured to counter-rotate. The needle is revolvable eccentrically around the first roller responsive to counter-rotation of the first and second rollers. A drive mechanism is secured to the frame and is configured to move the frame.

Abstract: The present invention provides a tissue closure device, comprising: a first clamping base and a second clamping base which may be opened/closed relatively and form an accommodation cavity after being closed; and a pouch assembly which may be driven to move in the accommodation cavity, wherein: the pouch assembly comprises a staple pusher, a pair of needle heads movably connected to the staple pusher, and a connection portion connected to the proximal ends of the pair of needle heads; and when the staple pusher moves from the proximal end to the distal end, the pair of needle heads pushes a tubular tissue located in the accommodation cavity to the distal end until the distal ends of the pair of needle heads are closed to close the tubular tissue into a purse string. A bundled purse string with a gathered center may be formed through the tissue closure device.

Abstract: Disclosed embodiments include apparatuses and methods for deploying a coilable filament on opposing sides of a surface. An apparatus includes a needle mechanism configured to extend and withdraw the needle. A coil mechanism is configured to advance a stylet through the needle to extend a coilable filament at a distal end of the stylet. An interlock mechanism is configured to control operations of the needle mechanism and the coil mechanism, including moving the needle and the stylet in concert to extend the needle and coilable filament to a distal side of the surface, separately advancing the stylet to extend a first segment of the coil on the distal side of the surface, withdrawing the needle to the proximal side of the surface, and separately further advancing the stylet to deploy a second segment of the coil along the proximal side of the surface.

Abstract: A method for obviating spline crash in a surgical stapler that utilizes a motor of the surgical stapler includes oscillating an anvil retainer of the surgical stapler in a first oscillation pattern, oscillating the anvil retainer in a second oscillation pattern that is different from the first oscillation pattern after the first oscillation pattern, and retracting the anvil retainer until an anvil of the surgical stapler is in a clamped position relative to a shell assembly after the second oscillation pattern. Oscillating the anvil retainer in the first oscillation pattern includes oscillating the anvil retainer in a longitudinal direction between extension and retraction with the motor such that the anvil moves towards and away from the shell assembly. Oscillating the anvil retainer in the second oscillation pattern includes moving the anvil towards and away from the shell assembly.

Abstract: An anvil assembly for use with a circular stapling instrument includes an anvil center rod and an anvil head. The anvil head includes an anvil housing, a backup member and at least one retainer. The backup member is configured for longitudinal movement from an initial longitudinal position retaining the anvil head in a first operative condition to an advanced longitudinal position permitting pivotal movement of the anvil head to a second tilted condition.

Abstract: An apparatus includes a body, a shaft, a stapling head assembly, and an anvil. The body includes a motor, a first user input feature, and a second user input feature. The first user input feature is operable to activate the motor. The shaft extends distally from the body. The stapling head assembly is positioned at a distal end of the shaft. The stapling head assembly includes an anvil coupling feature, at least one annular array of staples, and a staple driver. The second user input feature is operable to drive the anvil coupling feature longitudinally. The staple driver is operable to drive the at least one annular array of staples. The motor is operable to drive the staple driver. The anvil is configured to couple with the anvil coupling feature. The anvil is further configured to deform the staples driven by the staple driver.