A stapling assembly comprising an anvil, a staple cartridge, and a tissue cutting knife is disclosed. The staple cartridge comprises a longitudinal slot, a first group of staple cavities, a second group of staple cavities, staple drivers, and staples. The staples comprise a first group of staples positioned in the first group of staple cavities, and a second group of staples positioned in the second group of staple cavities. The first group of staples are deformed against the anvil to a first formed height by the staple drivers during a staple firing stroke. The second group of staples are deformed against the anvil to a second formed height by the staple drivers during the staple firing stroke. The second formed height is different than the first formed height. The tissue cutting knife is movable longitudinally within the longitudinal slot to drive the staple drivers during the staple firing stroke.

A circular stapling device includes an anvil assembly and an adaptor assembly including a shell assembly. The adaptor assembly includes an anvil retainer including an asymmetric tip. The anvil assembly has a center rod, an anvil head supported on the center rod, and an alignment member. The center rod has a proximal portion and a distal portion and defines a channel that extends from the proximal portion to the distal portion. The alignment member is positioned within the channel and is configured to engage the asymmetric trocar tip of the anvil retainer of the adaptor when the anvil assembly is attached to the anvil retainer to properly align the anvil assembly with the shell assembly.

According to one embodiment of the present disclosure, a surgical device is disclosed. The surgical device includes a motor and a transmission assembly movable by the motor. The surgical device also includes a force sensor configured to measure force imparted on the transmission assembly. The device may also include a controller configured to: control the motor to move the transmission assembly to a starting position, interrogate the force sensor to receive a sensor signal, compare the sensor signal to a threshold, and determine whether the force sensor is faulty based on the comparison of the sensor signal to the threshold.

A surgical kit includes a stapling device and a securing ring. The stapling device includes a reload including a trocar member and an anvil assembly including an anvil and an anvil shaft detachably couplable to the trocar member of the reload for unitary movement. The securing ring is selectively securable about the anvil shaft. The securing ring has an annular profile defining an aperture. The securing ring includes first and second portions and an intermediate portion. The first and second portions adjustably overlap each other. The first portion includes a first tab. The second portion includes a hook. The intermediate portion includes a second tab and defines slots to receive the hook of the second portion. When the first and second tabs are displaced relative to each other, the aperture is transitionable from a first state having a first diameter to a second state having a second diameter.

A surgical device includes a motor and a reload having a plurality of staples. The surgical device also includes an anvil assembly movable relative to the reload by the motor to clamp tissue therebetween. The device further includes a force sensor configured to measure force imparted on the anvil assembly. The device additionally includes a controller configured to compare the measured force to a target force, determine a distance at which the measured force matches the target force, and output the distance and the target force.

A surgical stapling device includes an end effector configured to accommodate prolapsed tissue to perform an anastomosis externally of a body cavity. The surgical stapling device has an anvil assembly and a shell assembly. The anvil assembly includes an anvil plate and anvil rods that extend proximally from the anvil shaft and are positioned about the shell assembly. The anvil plate has a proximally facing surface that defines staple forming pockets. The shell assembly includes a shell housing that defines a cavity, an annular pusher that is movable within the cavity from a retracted position to an advanced position, an annular staple cartridge, and an annular knife blade. The staple cartridge includes staple receiving pockets that receive staples, and the knife blade is secured to the pusher radially outwardly of the staple receiving pockets.

A surgical stapling apparatus includes an end effector and an electronics assembly, the end effector having an anvil assembly and a cartridge assembly. The anvil and cartridge assemblies are positionable between an open position and a closed position to selectively grasp tissue therebetween. The electronics assembly is supported in the end effector and configured to determine a condition of the grasped tissue based on an amount of current in an electrical circuit defined by the anvil and cartridge assemblies.

A loading unit includes a shell assembly and a locking collar. The shell assembly has an annular ring that defines a locking slot and a proximal opening. The proximal opening configured to receive a distal end portion of the surgical instrument. The locking collar is rotatably disposed about the annular ring. The locking collar has a body including a flexible tab that has an inwardly extending lock. The locking collar is moveable about the annular ring between a locked and unlocked configuration. In the locked configuration, the lock passes through the locking slot and into the proximal opening of the annular ring. In the unlocked configuration, the body of the locking collar is rotated about the annular ring from the locked configuration to move the lock from within the proximal opening.

An end effector including an elongate shaft with a lumen has an adapter at one end for coupling with a handle assembly of a surgical instrument. A support member has opposed openings defining a passage. The support member is positionable within the lumen. A trocar assembly has a sleeve and a trocar member. The trocar assembly is insertable into the passage. The sleeve includes an orifice extending through a wall of the sleeve. A pin is disposed in the elongate shaft and is slidable in a direction that is transverse to a longitudinal axis of the elongate shaft. The pin is insertable into the orifice for retaining the trocar assembly longitudinally stationary relative to the elongate shaft that defines an inserted position of the pin. The support member includes a proximal ramp that is engageable with a head of the pin to maintain the pin in the orifice of the sleeve.

A circular stapling device includes an elongate body having a flexible outer tube that supports a reload assembly, a flexible inner cable that supports an anvil assembly, and a flexible central tube that is supported about the inner cable and within the outer tube. The stapling device is configured to access body cavities which cannot be easily accessed by a circular stapling device having a rigid shaft.