Incorporating rapid cooling in tissue fusion heating processes

• US 7,708,735 B2
• Filed: 07/19/2005
• Issued: 05/04/2010
• Est. Priority Date: 05/01/2003
• Status: Active Grant

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Covidien AG (Medtronic Plc)
• Inventors: Hammill, Curt D., Chapman, Troy J., Podhajsky, Ronald J., Shields, Chelsea, Schechter, David A.
• Primary Examiner(s): PEFFLEY, MICHAEL F
• Application Number:
  US11/184,338
• Publication Number:
  US 20060052778A1
• Time in Patent Office: 1,750 Days
• Field of Search: 606 48- 52
• US Class Current: 606/51
• 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 2018/00023 closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61B 2018/00047 using Peltier effect
• CPC Class Codes: A61B 2018/0063 Sealing
• CPC Class Codes: A61B 2018/146 Scissors

Abstract

An electrode sealing assembly for use with an electrosurgical instrument for sealing tissue includes first and second jaw members which are movable from a first position in spaced relation relative to one another to at least one second position for grasping tissue. The jaw members include electrically conductive sealing plates designed to selectively transmit electrosurgical energy to tissue disposed between the sealing plates. The jaw members also include a thermoelectric cooling plate having a first surface in direct contact with an outer surface of the sealing plate. The thermoelectric cooling plate includes first and second electrical connections on opposite sides of the jaw member. The first connection is configured to selectively transmit a first electrical potential and the second connection is configured to selectively transmit a second electrical potential such that heat generated by the sealing plates is transferred away from the tissue via the thermoelectric cooling plate.

Claims

1. An electrode sealing assembly designed for use with an electrosurgical instrument for sealing tissue, comprising:

first and second jaw members being movable from a first position in spaced relation relative to one another to at least one second position for grasping tissue therebetween, the jaw members including;

electrically conductive sealing plates disposed in opposing relation to one another, at least one jaw member including;

a thermoelectric cooling plate having a first surface in direct contact with an outer surface of the sealing plate, said thermoelectric cooling plate including first and second electrical connections disposed on opposite sides of the thermoelectric cooling plate, said first connection being configured to selectively transmit a first electrical potential and said second connection being configured to selectively transmit a second electrical potential such that heat generated by the sealing plates is transferred away from the tissue via the thermoelectric cooling plate,

wherein the at least one jaw member further includes a heat sink disposed in direct contact with a second surface of the thermoelectric cooling plate, and

wherein the heat sink is made from a thermally conductive, electrically insulative cool polymer.

2. An electrode sealing assembly according to claim 1, wherein the heat sink is configured to be coupled to a second heat sink for transferring heat at least one of to and from the jaw member.

3. An electrode sealing assembly according to claim 2, wherein the second heat sink is made from a thermally conductive, electrically insulative cool polymer.

4. An electrode sealing assembly according to claim 1, wherein the heat sink includes a coolant line disposed therethrough.

5. An electrode sealing assembly according to claim 4, wherein the coolant line is configured to receive a coolant to transfer heat from the thermoelectric cooling plate.

6. An electrode sealing assembly according to claim 5, wherein the coolant is a thermally conductive, non-electrically conductive fluid.

7. An electrode sealing assembly according to claim 6, wherein the non-electrically conductive fluid is one of the group consisting of air, nitrogen and carbon dioxide.

8. An electrode sealing assembly according to claim 5, wherein the coolant is a medicinal fluid.