05271543 is referenced by 605 patents and cites 2 patents.

A surgical stapling instrument for performing a circular anastomosis stapling operation is provided. The surgical instrument includes a stapling head assembly mounted by a flexible support shaft to an actuator handle assembly. The support shaft is capable of bending in any radial direction relative to its centerline into a curved configuration suitable for insertion into a patient. The flexible support shaft includes a dual coil structure which is adapted to support itself in any curved configuration and to resist deflection upon insertion into the patient and actuation of the stapling head assembly. The stapling head assembly includes a driver assembly which is operable in multiple stages to separate the staple forming and tissue cutting actions to reduce the peak force required to operate the instrument. The actuator handle assembly includes a staple actuating lever and a cam follower assembly which operate in two stages with different mechanical advantages to facilitate the operation of the instrument by a surgeon. The actuator handle assembly includes a thumb wheel for opening and closing the anvil and an adjusting knob for adjusting the anvil gap. A control lever is provided for pivoting the stapling head assembly relative to the flexible support shaft.

Title
Surgical anastomosis stapling instrument with flexible support shaft and anvil adjusting mechanism
Application Number
7/832299
Publication Number
5271543
Application Date
February 7, 1992
Publication Date
December 21, 1993
Inventor
W Thompson Lawrence
Lexington
MA, US
Philip J Churchill
North Potomac
MD, US
Michael Lang
Cincinnati
OH, US
Richard L Grant
Cincinnati
OH, US
Agent
Charles P Boukus
Paul A Coletti
Assignee
Ethicon
NJ, US
IPC
A61B 17/115
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