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.

The present disclosure relates generally to systems, medical devices, and methods for closing an opening in a target tissue using hydraulics and/or pneumatics. In some embodiments, a medical device may include an endoscopic device operable to close an opening in a target tissue, and an actuator operable with the endoscopic device, wherein the actuator includes a piston within a chamber. The piston may include a piston head engaged with an interior surface of the chamber, and a piston rod coupled to a tissue engagement component of the endoscopic device, wherein pressure from a fluid within the chamber actuates the tissue engagement component.

Aspects of the present disclosure are presented for a surgical instrument having one or more sensors at or a near an end effector and configured to aide in the detection of tissues and other materials and structures at a surgical site. The detections may then be used to aide in the placement of the end effector and to confirm which objects to operate on, or alternatively, to avoid. Examples of sensors include laser sensors used to employ Doppler shift principles to detect movement of objects at the surgical site, such as blood cells; resistance sensors to detect the presence of metal; monochromatic light sources that allow for different levels of absorption from different types of substances present at the surgical site, and near infrared spectrometers with small form factors.

Surgical instruments are disclosed that are couplable to or have an end effector or a disposable loading unit with an end effector, and at least one micro-electromechanical system (MEMS) device operatively connected to the surgical instrument for at least one of sensing a condition, measuring a parameter and controlling the condition and/or parameter.

A surgical instrument and method of manipulating tissue of a patient includes a body having a firing mechanism configured to be selectively manipulated by an operator, a shaft assembly extending distally from the body, and an end effector extending distally from the shaft assembly and configured to receive a cartridge for manipulating tissue of a patient. The end effector includes a distal end portion, a proximal end portion, a gap between the distal and proximal end portions, and a guide pin. The guide pin extends from the distal end portion to the proximal end portion and is connected thereto. Thereby, the guide pin is configured to secure the distal end portion relative to the proximal end portion and inhibit deflection of the distal end portion relative to the proximal end portion.

The present disclosure provides a surgical instrument including an end effector, a drive member movable to effectuate a motion in said end effector, a motor operable to move the drive member to effectuate the motion in the end effector and a bailout assembly operable to perform a mechanical bailout of the surgical instrument in response to a bailout error. The bailout assembly includes a bailout door, a bailout handle accessible through the bailout door. The bailout handle is operable to move the drive member to effectuate a bailout motion in the end effector. A controller includes a memory and a processor coupled to the memory. The processor is configured to detect the bailout error. The processor is programmed to stop the motor in response to the detection of the bailout error.

A surgical stapling instrument is disclosed. The stapling instrument comprises an end effector including a staple cartridge comprising a circular array of staple cavities and staples removably stored in the staple cavities and, in addition, an anvil configured to deform the staples which is movable toward the staple cartridge to clamp tissue therebetween. The anvil is movable away from the staple cartridge to release the tissue after the tissue has been stapled. The stapling instrument further comprises a lockout configured to prevent the anvil from being moved toward the staple cartridge once again until the staple cartridge has been replaced with an unfired staple cartridge.

A surgical instrument and method for indicating that a cartridge has been fired includes an end effector receiving a cartridge having at least one of a knife and a plurality of staples, a shaft assembly connected to the end effector, and a handle assembly. The handle assembly has a handle housing, a firing member configured to selectively actuate from a first position to a second position as a firing stroke, and a feedback generator operatively connected to the firing member. The firing member is configured to actuate the cartridge from an unfired cartridge position to a fired cartridge position when the firing member is actuated. The feedback generator is configured to communicate an audible sound and a visual indicia to an operator indicative of the firing member completing the firing stroke for actuating the cartridge to the fired cartridge position.

A surgical instrument. The surgical instrument includes an elongated channel, an anvil pivotably connected to the elongated channel, a closure member mechanically coupled to the anvil, an electric motor mechanically coupled to the closure member, a motor controller electrically coupled to the electric motor and a control circuit electrically connected to the motor controller. The control circuit is configured to monitor a first predefined event, monitor a second predefined event, provide a stop signal to the motor controller to stop a closing motion of at least one of the elongated channel and the anvil after an occurrence of the first predefined event, and provide a start signal to the motor controller to start the closing motion of the at least one of the elongated channel and the anvil after an occurrence of a second predefined event.

An adapter assembly includes a switch actuator, an actuation bar, and a latch. The switch actuator is movable between a proximal position, in which the switch actuator actuates a switch, and a distal position. The latch is movable between a first position, in which the latch permits proximal movement of the switch actuator, and a second position, in which the latch prevents proximal movement of the switch actuator. The latch is configured to move from the first position toward the second position in response to the actuation bar moving toward a proximal position.