US 12,064,116 B2
Circular surgical stapler with anastomosis release feature
Austin E. Wise, Cincinnati, OH (US); and Shane R. Adams, Lebanon, OH (US)
Assigned to Cilag GmbH International, Zug (CH)
Filed by Cilag GmbH International, Zug (CH)
Filed on Sep. 30, 2021, as Appl. No. 17/489,871.
Prior Publication US 2023/0102965 A1, Mar. 30, 2023
Int. Cl. A61B 17/115 (2006.01); A61B 17/00 (2006.01); A61B 17/072 (2006.01); A61B 90/00 (2016.01)
CPC A61B 17/1155 (2013.01) [A61B 2017/00398 (2013.01); A61B 2017/07264 (2013.01); A61B 2017/07285 (2013.01); A61B 2090/061 (2016.02)] 18 Claims
OG exemplary drawing
 
1. A surgical stapling instrument, comprising:
(a) an anvil defining a plurality of staple forming pockets;
(b) a stapling head assembly comprising:
(i) a body,
(ii) a coupling member configured to actuate relative to the body to thereby actuate the anvil relative to the body,
(iii) a deck surface, wherein the anvil and the deck surface are configured to cooperatively grasp tissue,
(iv) a staple driver assembly configured to actuate distally and proximally through a first firing stroke to drive a plurality of staples against the staple forming pockets of the anvil, wherein the staple driver assembly is configured to actuate distally and proximally through a second firing stroke such that a portion of the staple driver assembly actuates distally past the deck surface, and
(v) a knife member comprising a cylindrical knife and a cutting edge configured to actuate with the staple driver during the first firing stroke to sever tissue, wherein the knife member is configured to remain in a retracted position relative to the staple driver assembly such that the cutting edge remains proximal relative to the deck surface throughout the second firing stroke; and
(c) a retracting assembly configured to drive the knife member into the retracted position during the first firing stroke.