Surgical instruments and end effectors therefor

• US 9,456,864 B2
• Filed: 02/03/2014
• Issued: 10/04/2016
• Est. Priority Date: 05/17/2010
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery LLC (Johnson & Johnson)
• Inventors: Bernath, Steve G., Witt, David A., Huang, Zhifan F., Dietz, Timothy G., Banks, Raymond M., Aldridge, Jeffrey L., Norvell, David K., Weizman, Patrick A., Harris, Jason L.
• Primary Examiner(s): PEFFLEY, MICHAEL F
• Application Number:
  US14/171,035
• Publication Number:
  US 20140148806A1
• Time in Patent Office: 974 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/295 combined with cutting implements
• CPC Class Codes: A61B 17/32 Surgical cutting instruments A61B18/042 takes precedence; suture cutters A61B17/0467; instruments for ligaturing or cutting A61B17/128; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133
• CPC Class Codes: A61B 17/3209 Incision instruments
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 18/148 having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
• CPC Class Codes: A61B 18/1485 having a short rigid shaft for accessing the inner body through natural openings
• CPC Class Codes: A61B 2017/003 Steerable
• CPC Class Codes: A61B 2017/00738 part of the tool being offset with respect to a main axis, e.g. for better view for the surgeon
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/2926 Details of heads or jaws
• CPC Class Codes: A61B 2017/2933 camming or guiding means
• CPC Class Codes: A61B 2017/2934 arcuate shaped guiding means
• CPC Class Codes: A61B 2017/2945 Curved jaws
• CPC Class Codes: A61B 2017/320044 Blunt dissectors blunt suture needles A61B2017/06085
• CPC Class Codes: A61B 2018/0063 Sealing
• CPC Class Codes: A61B 2018/126 bipolar
• CPC Class Codes: A61B 2018/1412 Blade
• CPC Class Codes: A61B 2018/1432 curved
• CPC Class Codes: A61B 2018/1455 having a moving blade for cutting tissue grasped by the jaws
• CPC Class Codes: A61B 2018/1465 Deformable electrodes

Abstract

An end effector for use with a surgical instrument is disclosed. The end effector comprises a first jaw, a second jaw, wherein the first jaw is movable relative to the second jaw to transition the end effector between an open configuration and an approximated configuration to clamp tissue between the first jaw and the second jaw, and a camming assembly. The camming assembly comprises a first camming member comprising a first distal camming portion, a first proximal camming portion, and a first flexible portion extending between the first distal camming portion and the first proximal camming portion. The camming assembly further comprises a second camming member and a connector at least partially disposed between the first camming member and the second camming member, wherein the camming assembly is movable relative to the end effector to transition the end effector to the approximated configuration.

Claims

1. A surgical instrument, comprising:

an elongate shaft;

an end effector extending from said elongate shaft, said end effector comprising;

a first member; and

a second member, wherein said first member is movable relative to said second member to transition said end effector between an open configuration and an approximated configuration to clamp tissue between said first member and said second member; and

a camming assembly movable along a curved path, said camming assembly comprising;

a first camming member, wherein said first camming member comprises;

a first distal camming portion;

a first proximal camming portion; and

a first flexible portion extending between said first distal camming portion and said first proximal camming portion;

a second camming member, wherein said second camming member comprises;

a second distal camming portion;

a second proximal camming portion; and

a second flexible portion extending between said second distal camming portion and said second proximal camming portion; and

a connector at least partially disposed between said first camming member and said second camming member, wherein said connector comprises a cutting member at a distal portion thereof, and wherein said camming assembly is movable relative to said end effector to exert a camming force against said first member and said second member to transition said end effector to said approximated configuration.

2. The surgical instrument of claim 1, wherein at least one of said first flexible portion and said second flexible portion is fabricated from an elastic alloy.

3. The surgical instrument of claim 1, wherein said elongate shaft comprises a flexible portion.

4. The surgical instrument of claim 1, wherein at least one of said first member and said second member comprises an electrode.

5. The surgical instrument of claim 1, wherein at least one of said first camming member and said second camming member defines a plane intersected by said cutting member.

6. The surgical instrument of claim 1, wherein said first member comprises a first channel configured to receive at least a portion of said first camming member.

7. The surgical instrument of claim 6, wherein said second member comprises a second channel configured to receive at least a portion of said second camming member.

8. The surgical instrument of claim 1, wherein at least one of said first flexible portion and said second flexible portion comprises a plurality of cutout portions.

9. The surgical instrument of claim 8, wherein each said cutout portion comprises a first region and a second region, wherein said first region is narrower than said second region, and wherein said second region is further away from said connector than said first region.

10. The surgical instrument of claim 1, wherein said first flexible portion comprises a first plurality of cutout portions, wherein said second flexible portion comprises a second plurality of cutout portions, and wherein at least one of said first plurality of cutout portions is aligned with at least one of said second plurality of cutout portions.

11. The surgical instrument of claim 1, wherein said camming assembly is formed in the shape of an I-beam.

12. A surgical instrument, comprising:

an elongate shaft;

an end effector extending from said elongate shaft, said end effector comprising;

a first jaw; and

a second jaw, wherein said first jaw is movable relative to said second jaw to transition said end effector between an open configuration and an approximated configuration to clamp tissue between said first jaw and said second jaw; and

a bendable firing member movable along a non-linear path, said bendable firing member comprising;

a first bendable portion defining a first plane, said first bendable portion comprising a first camming surface at a distal portion thereof;

a second bendable portion defining a second plane, said second bendable portion comprising a second camming surface at a distal portion thereof; and

a connector defining a third plane intersecting said first plane and said second plane, wherein said connector comprises a cutting member at a distal portion thereof, and wherein said first camming surface and said second camming surface are configured to engage said first jaw and said second jaw respectively to transition said end effector to said approximated configuration.

13. The surgical instrument of claim 12, wherein at least one of said first bendable portion and said second bendable portion is fabricated from an elastic alloy.

14. The surgical instrument of claim 12, wherein said elongate shaft comprises a bendable portion.

15. The surgical instrument of claim 12, wherein at least one of said first jaw and said second jaw comprises an electrode.

16. The surgical instrument of claim 12, wherein said first jaw comprises a first channel configured to receive said first camming surface.

17. The surgical instrument of claim 16, wherein said second jaw comprises a second channel configured to receive said second camming surface.

18. The surgical instrument of claim 12, wherein at least one of said first bendable portion and said second bendable portion comprises a plurality of cutout portions.

19. The surgical instrument of claim 18, wherein each said cutout portion comprises a first region and a second region, wherein said first region is narrower than said second region, and wherein said second region is further away from said connector than said first region.

20. An end effector for use with a surgical instrument, said end effector comprising:

a first jaw;

a second jaw, wherein said first jaw is movable relative to said second jaw to transition said end effector between an open configuration and an approximated configuration to clamp tissue between said first jaw and said second jaw; and

a camming assembly movable along a curved path, said camming assembly comprising;

a first camming member, wherein said first camming member comprises;

a first distal camming portion;

a first proximal camming portion; and

a first flexible portion extending between said first distal camming portion and said first proximal camming portion;

a second camming member; and

a connector at least partially disposed between said first camming member and said second camming member, wherein said connector comprises a cutting member at a distal portion thereof, and wherein said camming assembly is movable relative to said end effector to exert a camming force against said first jaw and said second jaw to transition said end effector to said approximated configuration.

21. The surgical instrument of claim 20, wherein said first flexible portion comprises a plurality of recesses.