Surgical stapling instrument having multistroke firing with...

Details Surgical stapling instrument having multistroke firing with... Surgical stapling instrument having multistroke firing with...

2003-09-29

2008-10-14

Nash, Brian D (Department: 3721)

Elongated-member-driving apparatus

Surgical stapler

With lockout

C227S019000, C227S175100, C227S178100

Reexamination Certificate

active

07434715

ABSTRACT:
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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