Cooling element for electrosurgery

Abstract

A cooling member for a cautery surgical instrument such as a surgical forceps including a pair of elongate arms joined at an end so as to provide for resilient compressible movement of the arms between a normally open position and a squeezed closed position. The cooling member provides for conduction of heat away from an electrode tip and includes a first portion having a first diameter and a second portion spaced away from the first portion that transitions from the first diameter to at least one smaller diameter section. A socket is disposed within each arm of the forceps. The socket includes a longitudinal blind hole that is sized so as to releasably receive the smaller diameter section of the second portion, and a catch for engaging a portion of the arm.

1 . A surgical device comprising:
 a forceps portion comprising a pair of elongate, resiliently biased, arms, each arm having a free end and an opposite joined end for engaging the joined end of the opposite arm, wherein the arms are joined so as to provide for resilient movement of the arms between a normally open position in which the arms are disposed in spaced-apart relation and a squeezed closed position, wherein said free ends are disposed in a substantially abutting relationship, each arm further including a receptacle disposed between the free end and joined end;   a cautery member associated with each arm, each cautery member comprising:   (i) an electrode tip portion,   (ii) a cooling member portion, and   (iii) a socket portion,   wherein each electrode tip portion is configured to supply energy to tissue, and each cooling member portion is configured for conducting heat away from the respective electrode tip portion, wherein said cooling member portion further comprises a first portion associated with said electrode tip portion and a second portion associated with a portion of the respective forceps arm that is spaced a first distance from the free end and having a second diameter, the first portion and second portions having first and second diameters, respectively; and wherein the socket portion has an outer diameter substantially equal to the first diameter, the portion further having at one end a socket sized to receive said second portion of said cooling member and at an opposite end an arm engaging portion sized to be received within the receptacle of a respective arm.   
     
     
         2 . The surgical device of  claim 1 , wherein the cooling member comprises a cylindrical rod. 
     
     
         3 . The surgical device of  claim 2 , wherein the cooling member comprises copper. 
     
     
         4 . The surgical device of  claim 1 , wherein the cooling member comprises a hollow cylindrical member that is substantially filled with a fluid. 
     
     
         5 . The surgical device of  claim 4 , wherein the fluid is water. 
     
     
         6 . The surgical device of  claim 1 , wherein the cooling member comprises a hollow cylindrical member that is substantially filled with a phase change material. 
     
     
         7 . The surgical device of  claim 6 , wherein the phase change material is paraffin wax. 
     
     
         8 . The surgical device of  claim 6 , wherein the cooling member is operatively connected to a reservoir containing phase change material. 
     
     
         9 . The surgical device of  claim 1 , wherein the cooling member comprises a heat pipe having an internal wick, the wick having a phase change material encapsulated therein. 
     
     
         10 . The surgical device of  claim 1 , wherein the cooling member comprises a solid rod having a plurality of conductive filaments. 
     
     
         11 . The surgical device of  claim 10 , wherein the solid rod comprises copper and the plurality of conductive filaments comprise graphite. 
     
     
         12 . A surgical device comprising:
 a surgical forceps including a pair of opposing elongate arms, each arm:   (i) having a first end for supporting an electrode tip for applying energy to tissue, and   (ii) having an opposite second end joined to the opposing arm to allow resilient movement of said arms between a first position in which the arms are disposed in spaced-apart relation and a second position in which the electrode tips are disposed in a substantially abutting relationship, said arms each further including a recess disposed between the first and second ends;   a cauterizing member comprising the electrode tip portion, a cooling member portion and a socket member portion, the cooling member portion configured for conducting heat away from said electrode tip portion, said cooling member portion comprising a first end associated with the electrode tip and a second end associated with the socket member portion, and wherein the socket member portion has an outer diameter substantially equal to the first diameter of the cooling member, the socket member portion further having at one end a socket sized to receive the second end of the cooling member and at an opposite end an arm engaging portion sized to be received within the receptacle of a respective forceps arm.   
     
     
         13 . The surgical device of  claim 12 , wherein the cooling member comprises a cylindrical rod. 
     
     
         14 . The surgical device of  claim 13 , wherein the cooling member comprises copper. 
     
     
         15 . The surgical device of  claim 12 , wherein the cooling member comprises a hollow cylindrical member that is substantially filled with a fluid. 
     
     
         16 . The surgical device of  claim 15 , wherein the fluid is water. 
     
     
         17 . The surgical device of  claim 12 , wherein the cooling member comprises a hollow cylindrical member that is substantially filled with a phase change material. 
     
     
         18 . The surgical device of  claim 17 , wherein the phase change material is paraffin wax. 
     
     
         19 . The surgical device of  claim 17 , wherein the cooling member is operatively connected to a reservoir comprising phase change material. 
     
     
         20 . The surgical device of  claim 12 , wherein the cooling member comprises a heat pipe having an internal wick, the wick having a phase change material encapsulated therein.