Multi-stroke mechanism with automatic end of stroke retraction

Details Multi-stroke mechanism with automatic end of stroke retraction Multi-stroke mechanism with automatic end of stroke retraction

A - Human Necessities

61

B

A61B 17/00 (2006.01) A61B 17/068 (2006.01) A61B 17/285 (2006.01) A61B 17/295 (2006.01)

Patent

CA 2535224

A surgical stapling and severing instrument particularly suited to endoscopic procedures incorporates a handle that produces separate closing and firing motions to actuate an end effector. In particular, the handle produces multiple firing strokes in order to reduce the required amount of force required to fire (i.e., staple and sever) the end effector. A linked transmission reduces the required handle longitudinal length, yet achieves a rigid, strong configuration when straightened for firing. A traction biased firing mechanism avoids binding in driving this straightened linked rack in cooperation with an anti-backup mechanism, with a lockout mechanism that prevents releasing the closure trigger during firing. Furthermore, an external indicator gives feedback to the surgeon as to how far firing has progressed, as well as providing a manual retraction capability.

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