Insulating mechanically-interfaced boot and jaws for electrosurgical forceps

• US 9,023,043 B2
• Filed: 09/23/2008
• Issued: 05/05/2015
• Est. Priority Date: 09/28/2007
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Hushka, Dylan, Dumbauld, Patrick L., Guerra, Paul, Wagner, Robert S.
• Primary Examiner(s): Peffley, Michael
• Assistant Examiner(s): GIULIANI, THOMAS ANTHONY
• Application Number:
  US12/235,779
• Publication Number:
  US 20090088746A1
• Time in Patent Office: 2,415 Days
• Field of Search: 606/32, 606/51, 606/52, 607/98, 607/100, 607/115
• US Class Current: 606/52
• 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 2018/00083 low, i.e. electrically insulating
• CPC Class Codes: A61B 2018/00345 Vascular system
• CPC Class Codes: A61B 2018/00404 Blood vessels other than those in or around the heart
• CPC Class Codes: A61B 2018/00619 Welding
• CPC Class Codes: A61B 2018/0063 Sealing

Abstract

An electrosurgical forceps includes a shaft having a pair of jaw members at a distal end movable about a pivot from a first position disposed in spaced relation relative to one another to a second position wherein the jaw members are closer to one another for grasping tissue. A movable handle actuates a drive assembly to move the jaw members relative to one another. One (or both) of the jaw members is adapted to connect to a source of electrosurgical energy such that the jaw members are capable of conducting electrical energy to tissue held therebetween. A flexible insulating boot is disposed on an exterior surface of one or both jaw members and about the pivot and at least one retention element is configured to operably couple to both a proximal end of the jaw members and a distal end of the flexible insulating boot.

Claims

1. An electrosurgical forceps, comprising:

a shaft having a pair of jaw members at a distal end thereof, the jaw members being movable about a pivot from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members are closer to one another for grasping tissue;

a movable handle that actuates a drive assembly to move the jaw members relative to one another;

at least one of the jaw members being adapted to connect to a source of electrical energy such that the at least one jaw member is capable of conducting energy to tissue held between the pair of jaw members;

a flexible insulating boot disposed on at least a portion of an exterior surface of at least one jaw member and disposed circumferentially around at least a portion of the pivot, the flexible insulating boot defining an exterior surface and an inner peripheral surface; and

at least one retention element configured to directly couple to both a proximal end of the jaw members and a distal end of the shaft,

wherein the at least one retention element includes a pair of hook-like mechanical interfaces that engage the jaw members at the proximal end thereof and that engage the shaft at the distal end thereof.

2. An electrosurgical forceps according to claim 1 wherein the flexible insulating boot is overmolded over a proximal end of each jaw member and the retention element is dimensioned to operably engage the flexible insulating boot.

3. An electrosurgical forceps according to claim 1 wherein the flexible insulating boot includes a pair of slots defined in the exterior surface thereof which are dimensioned to receive the corresponding hook-like mechanical interfaces therealong.

4. An electrosurgical forceps according to claim 1 wherein the flexible insulating boot includes a plurality of electrically conductive leads disposed along the inner peripheral surface of the flexible insulating boot to provide electrical continuity to the pair of jaw members.