Surgical forceps with bifurcated flanged jaw components

• US 8,920,461 B2
• Filed: 05/01/2012
• Issued: 12/30/2014
• Est. Priority Date: 05/01/2012
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Unger, Jeffrey R., Allen, James D. IV, Joseph, Daniel A.
• Primary Examiner(s): Schaetzle, Kennedy
• Application Number:
  US13/461,397
• Publication Number:
  US 20130296856A1
• Time in Patent Office: 973 Days
• Field of Search: None
• US Class Current: 606/208
• CPC Class Codes: A61B 17/2816 Pivots
• CPC Class Codes: A61B 17/285 combined with cutting implements
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 18/1442 Probes having pivoting end effectors, e.g. forceps
• 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 2017/2947 Pivots
• CPC Class Codes: A61B 2018/00607 Coagulation and cutting with the same instrument
• CPC Class Codes: A61B 2018/0063 Sealing
• CPC Class Codes: A61B 2018/1455 having a moving blade for cutting tissue grasped by the jaws

Abstract

A forceps includes an end effector assembly having first and second jaw members. Each jaw member includes a bifurcated proximal flange extending therefrom defining first and second spaced-apart flange components. The first flange components are pivotably engaged to one another via a first engagement portion and the second flange components are pivotably engaged to one another via a second engagement portion. One or both of the jaw members is pivotable relative to the other about the first and second engagement portions between an open position and a closed position for grasping tissue therebetween. A guide member is configured for positioning between the proximal flanges of the jaw members. The guide member includes a tab extending transversely therefrom that is configured to operably engaged one of the first and second engagement portions to retain the jaw members in engagement with one another.

Claims

1. A forceps, comprising:

an end effector assembly including first and second jaw members, each of the jaw members including a proximal flange extending therefrom, each proximal flange defining a bifurcated configuration having first and second spaced-apart flange components, the first flange components of the jaw members configured to pivotably engage one another via a first engagement portion and the second flange components of the jaw members configured to pivotably engage one another via a second engagement portion independent of the first engagement portion, at least one of the first and second jaw members pivotable relative to the other about the first and second engagement portions between an open position and a closed position for grasping tissue therebetween; and

a guide member configured for positioning between the proximal flanges of the first and second jaw members, the guide member including at least one tab extending transversely therefrom, the tab configured to operably engage one of the first and second engagement portions to retain the jaw members in engagement with one another.

2. The forceps according to claim 1, wherein the first flange component of each of the jaw members includes an aperture defined transversely therethrough, one of the first flange components including a boss disposed about the aperture thereof, the boss configured for engagement within the aperture of the other first flange component for pivotably engaging the first flange components to one another.

3. The forceps according to claim 2, wherein the second flange component of each of the jaw members includes an aperture defined transversely therethrough, one of the second flange components including a boss disposed about the aperture thereof, the boss configured for engagement within the aperture of the other second flange component for pivotably engaging the second flange components to one another.

4. The forceps according to claim 2, wherein the tab is configured for engagement within the aperture defined within each of the first flange components.

5. The forceps according to claim 4, wherein the tab is configured to resiliently bias into engagement within the apertures defined within the first flange components.

6. The forceps according to claim 1, wherein the proximal flanges are disposed in an overlapping, offset configuration relative to one another.

7. The forceps according to claim 1, wherein the proximal flanges cooperate to define a lumen extending longitudinally therethrough.

8. The forceps according to claim 1, wherein the guide member is configured to substantially fill a volume of the lumen to inhibit lateral movement of the jaw members relative to one another.

9. The forceps according to claim 1, wherein the guide member is formed from first and second guide components.

10. The forceps according to claim 1, wherein the guide member defines a knife track extending longitudinally therethrough, the knife track configured to guide reciprocation of a knife therethrough for cutting tissue grasped between the jaw members.

11. The forceps according to claim 1, wherein the guide member defines at least one wire guide extending longitudinally therethrough, the at least one wire guide configured to route at least one wire therethrough for coupling to at least one of the jaw members.

12. The forceps according to claim 1, further comprising first and second shaft members, the first shaft member coupled to the first jaw member and the second shaft member coupled to the second jaw member such that movement of the shaft members relative to one another between a spaced-apart position and an approximated position effects movement of the jaw members between the open position and the closed position.

13. The forceps according to claim 12, wherein the first and second flange components of each of the jaw members are welded to the respective shaft member thereof.

14. The forceps according to claim 1, wherein each of the jaw members includes a plurality of individual layer components joined together.

15. A forceps, comprising:

first and second shaft members, each shaft member having a jaw member disposed at a distal end thereof, each of the jaw members including a proximal flange extending therefrom, each proximal flange defining a bifurcated configuration having first and second spaced-apart flange components, the first flange components of the jaw members pivotably engaged to one another via a first engagement portion and the second flange components of the jaw members pivotably engaged one another via a second engagement portion such that movement of the shaft members relative to one another between a spaced-apart position and an approximated position effects movement of the jaw members between an open position and a closed position for grasping tissue therebetween, the proximal flanges of the first and second jaw members defining a lumen extending longitudinally therethrough between the first and second engagement portions thereof; and

a guide member disposed within the lumen and engaged within one of the first and second engagement portions, the guide member configured to maintain the proximal flanges in engagement with one another.

16. The forceps according to claim 15, further comprising a knife assembly disposed within one of the jaw members, the knife assembly including a knife that is selectively translatable between a retracted position, wherein the knife is disposed within the jaw member, and an extended position, wherein the knife is advanced between the jaw members to cut tissue grasped therebetween.

17. The forceps according to claim 16, wherein the guide member includes a knife track defined therein, the knife track configured to guide translation of the knife between the retracted and extended positions.

18. The forceps according to claim 15, wherein the jaw members each include an electrically-conductive tissue sealing plate disposed thereon in opposed relation relative to one another, at least one of the tissue sealing plates adapted to connect to a source of electrosurgical energy for sealing tissue grasped between the jaw members.

19. The forceps according to claim 18, wherein the guide member defines at least one wire guide extending longitudinally therethrough, the at least one wire guide configured to route at least one wire therethrough for providing electrosurgical energy to the at least one tissue sealing plate.

20. The forceps according to claim 15, wherein each of the jaw members includes a plurality of individual layer components joined together.