Intravascular heat exchange catheter with temperature sensor

• US 20050010273A1
• Filed: 08/06/2004
• Published: 01/13/2005
• Est. Priority Date: 04/21/1998
• Status: Active Grant

• Current Assignee: Zoll Circulation Incorporated (Asahi Kasei Corporation)
• Original Assignee: Alsius Corporation (Asahi Kasei Corporation)
• Inventors: Barker, Peter, Walker, Blair D., Shimada, Lynn Miyeko, Huezo, Xochitl, Pompa, Hortensia
• Granted Patent: US 7,255,709 B2
• Time in Patent Office: Days
• US Class Current: 607/105
• CPC Class Codes: A61B 17/3415 for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06
• CPC Class Codes: A61B 2017/00084 Temperature
• CPC Class Codes: A61B 2018/00011 with fluids
• CPC Class Codes: A61B 2018/00023 closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61F 2007/126 for invasive application, e.g. for introducing into blood vessels
• CPC Class Codes: A61F 7/10 Cooling bags, e.g. ice-bags
• CPC Class Codes: A61F 7/12 Devices for heating or cooling internal body cavities
• CPC Class Codes: A61F 7/123 using a flexible balloon containing the thermal element
• CPC Class Codes: A61M 1/369 Temperature treatment
• CPC Class Codes: A61M 2025/0036 with more than four lumina
• CPC Class Codes: A61M 2025/1013 with concentrically mounted balloons, e.g. being independently inflatable
• CPC Class Codes: A61M 2205/36 related to heating or cooling
• CPC Class Codes: A61M 25/00 Catheters; Hollow probes dilators A61M29/00; peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00 ; for measuring or testing A61B; materials for catheters A61L29/00
• CPC Class Codes: A61M 25/0032 characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters
• CPC Class Codes: A61M 5/44 having means for cooling or heating the devices or media

Abstract

An indwelling heat exchange catheter with integrated temperature sensor includes a catheter tube. A closed loop heat exchanger extends from the catheter tube. A temperature sensor can be integrally formed with the catheter tube such that it is insulated from the closed loop heat exchanger. The indwelling heat exchange catheter can further include a guide-wire tube that extends from the catheter tube and in such a case, the temperature sensor can be affixed to the guide-wire tube. Alternatively, a wire can extend through the catheter tube and the temperature sensor can be affixed to the wire.

Claims

1. An indwelling heat exchange catheter, comprising:

at least one catheter tube;

at least one closed loop heat exchanger extending from the catheter tube; and

at least one temperature sensor integrally formed with the catheter tube, the temperature sensor being insulated from the closed loop heat exchanger.

2. The catheter of claim 1, further comprising:

at least one guide-wire tube extending from the catheter tube, the temperature sensor being affixed to the guide-wire tube.

3. The catheter of claim 2, further comprising:

a wire extending through the catheter tube, the temperature sensor being affixed to the wire.

4. The catheter of claim 3, wherein the wire is extended through the guide-wire tube.

5. The catheter of claim 3, wherein the wire comprises:

a curved end, the temperature sensor being affixed to the wire slightly spaced from the curved end of the wire.

6. The catheter of claim 1, wherein the temperature sensor is one of the following:

a thermistor or a thermocouple.

7. The catheter of claim 2, wherein the guide-wire tube establishes a depression in which the temperature sensor is installed.

8. The catheter of claim 7, further comprising:

an insulating layer disposed within the depression, the temperature sensor being affixed to the insulating layer.

9. The catheter of claim 8, further comprising:

a conductive layer disposed over the temperature sensor.

10. The catheter of claim 9, further comprising:

a non-porous layer disposed within the depression between the insulating layer and the temperature sensor.

11. An indwelling heat exchange catheter, comprising:

at least one working tube;

at least one closed loop heat exchanger;

at least one heat exchange portion established by the closed loop heat exchanger, the heat exchange portion being distanced from the working tube;

at least one temperature sensor integrally formed with the working tube; and

wherein when the heat exchange catheter is installed in a patient having blood, the blood flows between the heat exchange portion of the closed loop heat exchanger and the working tube.

12. The catheter of claim 11, further comprising:

at least one guide-wire tube, the temperature sensor being affixed to an outer wall of the guide-wire tube.

13. The catheter of claim 12, wherein the temperature sensor is one of the following:

a thermistor or a thermocouple.

14. The catheter of claim 12, further comprising:

a wire extended through the catheter, the temperature sensor being affixed to the wire.

15. The catheter of claim 14, wherein the wire is extended through the guide-wire tube.

16. The catheter of claim 14, wherein the wire comprises:

a curved end, the temperature sensor being affixed to the wire slightly spaced from the curved end of the wire.

17. The catheter of claim 12, wherein the guide-wire tube establishes a depression in which the temperature sensor is installed.

18. The catheter of claim 17, further comprising:

an insulating layer disposed within the depression, the temperature sensor being affixed to the insulating layer.

19. The catheter of claim 18, further comprising:

a conductive layer disposed over the temperature sensor.

20. The catheter of claim 19, further comprising:

a non-porous layer disposed within the depression between the insulating layer and the temperature sensor.