Catheter with coaxial thermocouple

Patent metadata

Field	Value
Publication number	US-10285754-B2
Application number	US-201514714904-A
Country	US
Kind code	B2
Filing date	May 18, 2015
Priority date	May 18, 2015
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

An improved thermocouple includes a drawn coaxial thermocouple wire pair having a more precise “hot” junction at which a first and second metallic material electrically connect with each other for measuring temperature. Adapted for use with an electrophysiologic catheter, the improved thermocouple comprising an elongated body having a proximal end and a distal end. The body includes a core of a first metallic material, a first coaxial layer of ceramic material, and a second coaxial layer of a second metallic material. The thermocouple further includes a solder cap on the distal end, the solder cap electrically connecting the core and the second layer at the distal end. A method of manufacturing includes drawing the body through a die, and applying solder on a distal end of the body to electrically connect the two metallic materials at the distal end.

First claim

What is claimed is:

1. A method of manufacturing a coaxial thermocouple wire pair member adapted for use with an electrophysiologic catheter, comprising:
providing a core of a first metallic material defining a longitudinal axis;
coaxially surrounding the core with a solid annular member formed from an insulating ceramic material;
coaxially surrounding the insulating material with a second metallic material different from the first metallic material;
repeatedly drawing the member through a die until the solid annual member is crushed to a powder; and
applying solder on a distal end of the member to electrically connect the core and the metallic layer at the distal end.

2. The method of claim 1 , further comprising:
forming an electrically non-conductive layer on the outside of the drawn thermocouple wire pair member by a film cast method.

3. The method of claim 1 , further comprising:
trimming the distal end to expose the core and the layer after drawing the member through a die and before applying solder on the distal end.

4. The method of claim 1 , where one of the first metallic material and the second metallic material is copper and the other of the first metallic material and the second metallic material is constantan.

Assignees

• Biosense Webster Israel Ltd

Inventors

• Beeckler Christopher Thomas

Classifications

• B21C1/00

  Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing · CPC title

• A61B2018/00077

  high, i.e. electrically conducting · CPC title

• A61B2018/00821

  measured by a thermocouple · CPC title

• H01B1/026

  Alloys based on copper · CPC title

• A61B2018/00351

  Heart · CPC title