In various embodiments, a layer of material can comprise a body, a proximal end portion, and a distal end portion. The proximal end portion can be releasably secured to a staple cartridge of a surgical end effector, and the distal end portion can be releasably secured to an anvil of the surgical end effector. The layer of material can comprise a tissue thickness compensator.

A surgical staple driver configured for use with a surgical staple cartridge that operably interfaces with a surgical instrument camming member that is axially movable along a first cam axis. A driver body is slidably supportable within the surgical staple cartridge. A camming surface is provided on the driver body that is oriented for camming engagement with the camming member along the first cam axis. The driver further includes a staple supporting portion that is configured to operably support at least one surgical staple thereon relative to the camming surface such that when the camming member engages the camming surface, the camming member passes transversely under a portion of a staple crown of at least one surgical staple supported on the staple supporting portion.

A loading unit including double pushers and double retention cavities is disclosed. At least one double pusher includes a first body portion having a first upper surface configured to engage a portion of a first fastener, a second body portion having a second upper surface configured to engage a portion of a second fastener, and a bridge interconnecting the first body portion and the second body portion. Each of the first upper surface and the second upper surface defining an acute angle with respect to a longitudinal axis. At least one double retention cavity includes a first retention guiding surface configured to engage a proximal pusher guiding surface of the first body portion of the double pusher retained therein, and a second retention guiding surface configured to engage a distal pusher guiding surface of the first body portion of the double pusher retained therein.

A surgical instrument that includes a shaft assembly that defines a shaft axis and includes a proximal articulation joint that defines a first articulation axis that is transverse to the shaft axis and a distal articulation joint that defines a second articulation axis that is transverse to the shaft axis and the first articulation axis. The instrument further includes an anvil that is non-removably attached to the shaft assembly and a channel that is removably attachable to the shaft assembly and configured to operably support a surgical staple cartridge.

Stapling assemblies for use with a surgical stapler are provided. In one exemplary embodiment, the stapling assembly includes a cartridge having a plurality of staples disposed therein and a non-fibrous adjunct formed of at least one fused bioabsorbable polymer and configured to be releasably retained on the cartridge. Adjunct systems for use with a surgical stapler are also provided. Surgical end effectors using the stapling assemblies are also provided. Methods for manufacturing stapling assemblies and using the same are also provided.

A surgical stapling system comprising an end effector, a firing member, a motor, and a control system is disclosed. The end effector comprises an elongate channel, a staple cartridge, and an anvil. The staple cartridge comprises staples removably stored therein. The elongate channel and the anvil are configurable in a closed configuration to capture tissue therebetween. The anvil comprises an impedance sensor configured to sense an impedance of the tissue. The firing member is moveable between a starting position and an ending position. The staples are deployable from the staple cartridge based on the firing member moving toward the ending position. The motor is configured to drive the firing member toward the ending position. The control system comprises a multiplexer configured to control the impedance sensor. The control system is configured to interrogate the impedance sensor to determine the impedance and control the motor based on the determined impedance.

Surgical instruments are disclosed comprising a firing assembly including a fuse having a plurality of operating states.

A staple cartridge comprising a tissue thickness compensator is disclosed. The tissue thickness compensator comprises an external layer and tubular elements. The tubular elements are interconnected and positioned within the external layer. The tubular elements comprise apertures defined therein and the tubular elements are configured to collapse as pressure is applied to the tissue thickness compensator by tissue during the firing motion. The apertures enable fluids from the tissue to permeate the tissue thickness compensator.

A surgical instrument comprising a firing drive and a bailout retraction system is disclosed.

A surgical cutting and fastening instrument comprises an end effector, a shaft connected to the end effector, and a handle connected to the shaft. The handle comprises an electric, DC motor connected to a drive train for powering the drive train and a plurality of series-connected DC power source connected to the motor for supplying electrical power to the motor. The handle also comprises a power source selection switch for connecting, when in a first state, all of the DC power sources to the motor, and, when in a second state, a subset of the DC power sources to the motor. Also disclosed are control systems for actuating a RF electrode in the end effector and for indicating actuation of the RF electrode.