Staple driver and guide assembly for circular surgical stapler

Patent metadata

Field	Value
Publication number	US-12059155-B2
Application number	US-202117489877-A
Country	US
Kind code	B2
Filing date	Sep 30, 2021
Priority date	Sep 30, 2021
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A surgical stapling instrument includes an anvil defining a plurality of staple forming pockets and a stapling head assembly. The stapling head assembly includes a body, a coupling member capable of actuating the anvil relative to the body, a staple deck defining a plurality of staple openings, and a firing assembly capable of driving a plurality of staples against the staple forming pockets of the anvil. The firing assembly includes a proximal driving body and an array of discrete staple driving segments positioned distal to the proximal driving body. The proximal driving body is slidably housed within the body. The staple driving segments each have a free proximal end. The proximal driving body is capable of simultaneously actuating the array of staple driving segments to drive the plurality of staples against the staple forming pockets of the anvil.

First claim

We claim:

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 staple deck defining a plurality of staple openings, wherein the staple deck comprises a plurality of a stop surfaces, and
(iv) a firing assembly configured to drive a plurality of staples against the staple forming pockets of the anvil, wherein the firing assembly comprises:
(A) a proximal driving body slidably housed within the body, and
(B) an array of discrete staple driving segments positioned distal to the proximal driving body and each having a free proximal end, wherein the proximal driving body is configured to simultaneously actuate the array of staple driving segments to drive the plurality of staples against the staple forming pockets of the anvil; wherein each stop surface of the plurality of stop surfaces is configured to inhibit a respective staple driving segment of the array of stapling driving segments from actuating distally past the staple deck along a common distal direction and thereby inhibit each staple driving segment of the array of staple driving segments from disassociating from the staple deck; and

(c) a shaft assembly extending proximally from the stapling head assembly.

2. The surgical stapling instrument of claim 1 , wherein at least one staple driving segment of the array of staple driving segments further comprises a stop body configured to engage a respective stop surface of the plurality of stop surfaces of the staple deck.

3. The surgical stapling instrument of claim 1 , wherein each staple driving segment of the array of staple driving segments comprises a proximal surface configured to engage the proximal driving body.

4. The surgical stapling instrument of claim 3 , wherein each staple driving segment of the array of staple driving segments comprises a distal staple engagement surface configured to suitably engage a respective staple of the plurality of staples.

5. The surgical stapling instrument of claim 1 , wherein each staple driving segment of the array of staple driving segments is slidably housed within a respective staple opening.

6. The surgical stapling instrument of claim 5 , wherein each staple driving segment of the array of staple driving segments is configured to drive a respective staple out of the respective staple opening.

7. The surgical stapling instrument of claim 1 , wherein the plurality of staple openings comprises a first circumferential array of staple openings.

8. The surgical stapling instrument of claim 7 , wherein the plurality of staple openings comprises a second circumferential array of staple openings.

9. The surgical stapling instrument of claim 1 , wherein each staple driving segment of the plurality of staple driving segments comprises a retention feature configured to inhibit proximal movement of the staple driving segment.

10. The surgical stapling instrument of claim 9 , wherein the retention feature comprises a resilient nub.

11. The surgical stapling instrument of claim 10 , wherein the staple deck comprises a distally facing ledge configured to engage the resilient nub.

12. The surgical stapling instrument of claim 1 , wherein the anvil is configured to selectively attach and detach from the coupling member.

13. The surgical stapling instrument of claim 1 , further comprising a handle assembly attached to a proximal end of the shaft assembly.

14. A surgical stapling instrument, comprising:
(a) an anvil defining a plurality of staple forming pockets; and
(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 staple deck defining a plurality of staple openings, wherein each staple opening in the plurality of staple openings contains a staple, and
(iv) a firing assembly configured to drive a plurality of staples against the staple forming pockets of the anvil, wherein the firing assembly comprises:
(A) a proximal driving body slidably housed within the body, wherein the proximal driving body comprises a plurality of pushing bodies located proximal relative to the plurality of staple openings, and
(B) a plurality of staple driving bodies slidably contained within the plurality of staple openings, wherein the staple driving bodies extend proximally from the staple openings and are engaged with the pushing bodies such that the proximal driving body is configured to simultaneously fire the plurality of staple driving bodies, wherein the staple driving bodies are decoupled from one another such that the staple driving bodies are configured to be individually inserted within respective openings of the plurality of staple openings.

15. The surgical stapling instrument of claim 14 , wherein the plurality of staple driving bodies is disposed along an arched profile.

16. The surgical stapling instrument of claim 14 , wherein the plurality of staple driving bodies comprises a distal end configured to extend distally past the staple deck in response to distal actuation of the proximal driving body.

17. The surgical stapling instrument of claim 14 , wherein the coupling member comprises a trocar.

18. A surgical stapling instrument, comprising:
(a) an anvil defining a plurality of staple forming pockets; and
(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 staple deck defining a plurality of staple openings, wherein the staple deck is fixed to the body, and
(iv) a firing assembly configured to drive a plurality of staples against the staple forming pockets of the anvil, wherein the firing assembly comprises:
(A) a proximal actuating body slidably housed within the body, wherein the proximal actuating body comprises a plurality of pushing bodies terminating proximal relative to the plurality of staple openings, and
(B) an array of staple driving segments slidably contained within the plurality of staple openings, wherein the staple driving segments are decoupled from one another such that each staple driving segment of the array of staple driving segments are configured to be individually inserted into a respective opening of the plurality of staple openings, wherein the pushing bodies are configured to simultaneously actuate the staple driving segments.

Assignees

• Cilag Gmbh Int

Inventors

• Wise Austin E
• Adams Shane R
• Kimsey John S

Classifications

• A61B2017/00477

  Coupling (A61B2017/0046 takes precedence) · CPC title

• A61B17/34

  Trocars; Puncturing needles · CPC title

• A61B2090/034

  abutting on parts of the device itself · CPC title

• A61B90/03

  Automatic limiting or abutting means, e.g. for safety · CPC title

• A61B2017/00473

  Distal part, e.g. tip or head (A61B2017/00464 takes precedence) · CPC title