Tubing set to interconnect heating/cooling system and indwelling heat exchange catheter

• US 8,790,304 B2
• Filed: 09/04/2012
• Issued: 07/29/2014
• Est. Priority Date: 09/25/2001
• Status: Expired due to Fees

• Current Assignee: Zoll Circulation Incorporated (Asahi Kasei Corporation)
• Original Assignee: Zoll Circulation Incorporated (Asahi Kasei Corporation)
• Inventors: Noda, Wayne A., Stelea, Stelica
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): CHANDER, DIVA KAKAR
• Application Number:
  US13/602,790
• Publication Number:
  US 20120325426A1
• Time in Patent Office: 693 Days
• Field of Search: 604/113
• US Class Current: 604/113
• CPC Class Codes: A61F 2007/0054 with a closed fluid circuit, e.g. hot water
• CPC Class Codes: A61F 2007/0093 programmed
• CPC Class Codes: A61F 2007/0096 with a thermometer
• CPC Class Codes: A61F 2007/126 for invasive application, e.g. for introducing into blood vessels
• CPC Class Codes: A61F 7/0085 Devices for generating hot or cold treatment fluids
• CPC Class Codes: A61F 7/12 Devices for heating or cooling internal body cavities
• CPC Class Codes: F04C 15/0069 Magnetic couplings
• CPC Class Codes: F04C 2/18 with similar tooth forms F04C2/16 takes precedence
• CPC Class Codes: F04C 29/0064 Magnetic couplings
• CPC Class Codes: F04D 13/024 a magnetic coupling
• CPC Class Codes: F04D 29/606 Mounting in cavities
• CPC Class Codes: F25B 2400/01 Heaters
• CPC Class Codes: F25B 2600/0253 with variable speed
• CPC Class Codes: F25B 2700/1351 of the cooled fluid upstream or downstream of the evaporator
• CPC Class Codes: F25D 17/02 for circulating liquids, e.g. brine

Abstract

A cooling system for an indwelling heat exchange catheter includes a heat exchange bath that is configured to receive a conduit that carries saline to and from the catheter. A heating/cooling fluid is in the bath and exchanges heat with the saline. The heating/cooling fluid flows through a heat exchanger that includes a refrigerant and two variable speed DC compressor for removing heat from the refrigerant. A gear pump circulates the working fluid to and from the catheter and is removably engaged with a pump support platform.

Claims

1. A heat exchange system for an indwelling closed loop heat exchange catheter, comprising:

a conduit configured to carry working fluid to and from the catheter; and

a flow detector in communication with the conduit for detecting when working fluid is flowing through the conduit, wherein the flow detector comprises;

a clear housing; and

a paddle wheel rotatably disposed therein.

2. The system of claim 1 comprising at least three infrared transmitter/receiver light emitting diode pairs, each infrared transmitter/receiver light emitting diode pair establishing a signal path through the housing.

3. The system of claim 2, wherein at least one of the infrared transmitter/receiver light emitting diode pairs outputs a signal representing motion of the paddle wheel.

4. The system of claim 1, wherein the peddle wheel comprises:

at least three paddles.

5. The system of claim 4, wherein the three paddles are arranged such that one of the signal paths established by the infrared transmitter/receiver light emitting diode pairs is always unblocked by the paddles.

6. The system of claim 2, wherein the infrared transmitter/receiver light emitting diode pairs are arranged relative to the paddle wheel such that one of the signal paths established by the infrared transmitter/receiver light emitting diode pairs is always unblocked by the paddle wheel.

7. The system of claim 2, further comprising:

a processor connected to the infrared transmitter/receiver light emitting diode pairs, the processor including a program for detecting when fluid is flowing through the flow detector based on signals from the infrared transmitter/receiver light emitting diode pairs.

8. The system of claim 4, wherein the paddles are positioned around a hub one hundred and twenty degrees (120°

) from each other.

9. The system of claim 1, wherein the conduit includes a coil.

10. The system of claim 1, comprising a plastic saline housing in fluid communication with the conduit, the plastic saline housing not being an IV bag.

11. The system of claim 10, wherein the plastic saline housing is part of a saline level detector.

12. The system of claim 8, wherein the conduit includes a coil.