Tissue fusion jaw angle improvement

• US 8,784,417 B2
• Filed: 08/28/2008
• Issued: 07/22/2014
• Est. Priority Date: 08/28/2008
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Hanna, D. Alan
• Primary Examiner(s): Vu, Quynh-Nhu H
• Assistant Examiner(s): Zhang, Jenna
• Application Number:
  US12/200,246
• Publication Number:
  US 20100057082A1
• Time in Patent Office: 2,154 Days
• Field of Search: 606/51
• US Class Current: 606/51
• 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 2018/145 wherein the effectors remain parallel during closing and opening

Abstract

A bipolar forceps for sealing tissue includes an end effector assembly having opposing first and second jaw members having a proximal end and a distal end. The jaw members are moveable relative to one another from a first spaced apart position to a second position in which the jaw members cooperate to grasp tissue. Each of the jaw members includes an electrode having an electrically conductive tissue sealing surface. An electrical energy source may be connected to the tissue sealing surfaces so that the sealing surfaces can conduct energy to tissue. Each electrode may be pivotably connected on a distal end to the respective jaw member to promote parallel closure of the sealing surfaces against tissue between the jaw members. Each electrode may be connected to its respective jaw member on a proximal end via a resilient member to bias the electrode against tissue disposed between the jaw members.

Claims

1. A bipolar forceps, comprising:

an end effector assembly including;

opposing first and second jaw members configured for selective movement relative to one another from a first spaced apart position to a second position wherein the jaw members cooperate to grasp tissue therebetween;

an electrode associated with each of the first and second jaw members, the electrode associated with each jaw member having an electrically conductive tissue sealing surface adapted to connect to an electrical energy source such that the electrically conductive tissue sealing surface is capable of conducting energy to tissue disposed between the first and second jaw members, the electrode associated with the first jaw member being connected to the first jaw member via a pivot disposed on a distal end of the electrode and via a resilient member disposed on a proximal end of the electrode, the pivot including a pivot pin and the electrode associated with the first jaw member being rotatable about the pivot pin, the pivot and the resilient member providing parallel alignment of the electrically conductive tissue sealing surfaces when the electrically conductive tissue sealing surfaces engage tissue disposed between the jaw members.

2. The bipolar forceps of claim 1, wherein the resilient member is a spring.

3. The bipolar forceps of claim 1, wherein the resilient member is disposed proximal of the pivot of the electrode of the first jaw member.

4. The bipolar forceps of claim 1, wherein the electrode associated with the second jaw member is pivotally connected to the second jaw member by a second pivot disposed at a distal end of the electrode associated with the second jaw member, the second pivot providing parallel alignment of the electrically conductive tissue sealing surfaces of the first and second electrodes when the electrically conductive tissue sealing surfaces engage tissue disposed between the jaw members.

5. The bipolar forceps of claim 1, wherein at least one of the electrically conductive tissue sealing surfaces includes at least one insulating member disposed along a length thereof to prevent unintended shorting between the electrically conductive tissue sealing surfaces when the jaw members are in the second position.

6. The bipolar forceps of claim 5, wherein the at least one insulating member is configured as an insulating ridge disposed along a length of electrically conductive tissue sealing surface to prevent unintended shorting between the electrically conductive tissue sealing surfaces when the jaw members are in the second position.

7. The bipolar forceps of claim 1, wherein the electrode of the first jaw member is disposed on an inner facing surface of the first jaw member.

8. The bipolar forceps of claim 1, wherein the electrode of the first jaw member is disposed in a recess defined in the first jaw member.