A surgical stapling apparatus includes a loading unit and a surgical buttress assembly. The loading unit includes an anvil assembly and a staple cartridge assembly. The staple cartridge assembly includes a staple cartridge having a tissue facing surface including staple pockets and a central longitudinal slot defined therethrough and a hook assembly extending outwardly from the tissue facing surface. The surgical buttress assembly includes an anvil buttress and a cartridge buttress. Each of the anvil and cartridge buttresses includes a body, a proximal tab, and a distal tab. The anvil and cartridge buttresses are interconnected at a junction of the proximal tabs and the surgical buttress assembly is folded at the junction such that the proximal tabs substantially overlie one another. The proximal tabs are engaged with the hook assembly to releasably secure the proximal tabs of the anvil and cartridge buttresses to the staple cartridge assembly.

A method of controlling motor velocity in a surgical instrument is disclosed. The surgical instrument includes a displacement member, a motor coupled to the displacement member, a control circuit coupled to the motor, a position sensor coupled to the control circuit, and a timer coupled to the control circuit. The method includes receiving a first position of a displacement member from a position sensor, starting a timer, advancing the displacement member to a second position by setting a motor velocity to a first velocity, receiving the second positon from the position sensor, stopping the timer when the displacement member reaches the second position, receiving elapsed time from the timer, wherein the elapsed time is the time taken by the displacement to move from the first position to the second positon, and controlling, by the control circuit, velocity of the motor based on the elapsed time.

The present disclosure provides a multipurpose endoscopic surgical instrument. The instrument adopts a technical feature in which an interchangeable tool and a tool holder are connected to each other by inserting the mounting key into the opening mounting groove, and adopts a technical feature that the driving member includes an inserting block at the front part. It realizes the technical solution that by moving the inserting block to insert into the interchangeable tool to prevent the mounting key from moving out of the opening of the mounting groove, the interchangeable tool can be mounted on the tool holder. It realizes the technical solution that by moving the inserting block to exit the interchangeable tool, the interchangeable tool can be moved out of the tool holder.

A loading unit for use with a surgical stapling instrument is disclosed. The loading unit comprises a shaft and an end effector extending from the shaft. The end effector comprises a first jaw that comprising an anvil, and a second jaw. At least one of the first jaw and the second jaw is movable relative to the other to grasp tissue. The second jaw comprises an elongated channel comprising retaining features, and a staple cartridge insertable into the elongated channel for assembly therewith. The staple cartridge comprises a cartridge pan, and a sled translatable relative to the cartridge pan from a first position toward a second position. The retaining features are configured to resist a movement by the sled beyond the first position up to a predetermined force.

An endoscopic tissue fastening device may include a body having a first portion and a second portion arranged alongside the first portion. The second portion may extend distally of the first portion and may terminate in a distal end face of the body. The device may further include a tissue fastening assembly having a fastening head with a proximal end and a distal end. The fastening head may be deflectable at a location between the proximal end and the distal end of the fastening head. The tissue fastening assembly may be received within a lumen of the body. Further, the body may be moveable between an unarticulated configuration and an articulated configuration. In the articulated configuration, a central longitudinal axis of the second portion of the body may be substantially parallel with a central longitudinal axis of the tissue fastening assembly.

A surgical stapler is described herein which includes a drive assembly. The drive assembly includes: a rotatable drive member defining a transverse axis; a linkage operably coupled to the rotatable drive member defining a longitudinal axis; and an I-beam operably coupled to the linkage, configured to be advanced along the longitudinal axis in response to a rotational motion of the rotatable drive member.

The present disclosure includes apparatuses for a surgical handle assembly. An example apparatus includes a reloadable cartridge assembly and a surgical handle assembly including an articulation assembly configured to maintain the reloadable cartridge assembly in a first operation position, the articulation assembly comprising a knob in a first position, a lock core coupled to the knob, a housing, a first roller and a second roller, and a first spring, wherein the first roller is positioned on a first end of the first spring and the second roller is positioned on a second end of the first spring, and wherein the first spring is configured to bias the first roller and the second roller between the lock core and the housing to maintain the knob in the first position.

A powered handle assembly includes a motor assembly, a rack, a spur gear, and a manual retract mechanism. The spur gear is movable from a position engaged with the motor assembly and the rack to a positioned disengaged from the motor assembly and engaged with the rack to facilitate manual retraction of the rack.

An apparatus comprises a shaft, an end effector, an articulation joint, and an articulation drive assembly. The shaft has a longitudinal axis. The end effector is operable to staple tissue. The articulation joint couples the shaft with the end effector. The end effector is pivotable at the articulation joint to selectively deflect the end effector away from the longitudinal axis of the shaft. The articulation drive assembly is operable to pivot the end effector at the articulation joint. The articulation drive assembly comprises a first link and a second link. The first link is longitudinally translatable relative to the shaft assembly. The distal end of the first link is pivotably coupled with the proximal end of the second link. The distal end of the second link is pivotably coupled with the end effector. The articulation drive assembly articulates the end effector in response to longitudinal translation of the first link.

Surgical stapler systems can include lockout mechanisms to restrict further movement of a jaw assembly and provide different functionality when a jaw assembly is empty and when a partially or fully fired reload cartridge is present in the jaw assembly. When the jaw assembly is empty, the empty jaw assembly lockout mechanism can arrest an open-close stroke of the jaw assembly. When an at least partially fired reload is present in the jaw assembly, a fired reload lockout mechanism can allow operation of the jaw assembly through a substantial portion of an open-close stroke, but restrict actuation of the jaw assembly in a firing stroke. The separate lockout mechanisms can be embodied in a single lockout lever actuatable by lockout actuators to three distinct positions or by two independently-operable lockout levers.