Heating/cooling system for indwelling heat exchange catheter

• US 8,317,491 B2
• Filed: 06/20/2007
• Issued: 11/27/2012
• Est. Priority Date: 04/21/1998
• Status: Expired due to Fees

• Current Assignee: Zoll Circulation Incorporated (Asahi Kasei Corporation)
• Original Assignee: Zoll Circulation Incorporated (Asahi Kasei Corporation)
• Inventors: Noda, Wayne, Stelea, Stelica
• Primary Examiner(s): Kramer, Devon
• Assistant Examiner(s): COMLEY, ALEXANDER BRYANT
• Application Number:
  US11/765,564
• Publication Number:
  US 20070240447A1
• Time in Patent Office: 1,987 Days
• Field of Search: 624/34, 604/131, 604/151, 417/319, 417/360, 417/363, 417/477.2, 248/222.52, 403/349
• US Class Current: 417/360
• 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 fluid pump assembly, comprising:

a pump support platform supporting a motor; and

a pump removably engaged with the pump support platform, the pump pumping working fluid to and from an intravascular catheter, the motor being removably coupled to the pump to provide power to the pump when the pump is engaged with the pump support platform, wherein the pump support platform includes a quick-release locking arm that prevents the pump from being disengaged with the pump support platform unless the locking arm is rotated to release the pump, wherein the pump support platform is formed with a generally cylindrical pump locking bore formed with a first slot, a second slot, and a third slot, each slot terminating in a respective bay, the pump including a housing supporting first, second, and third legs alignable with the respective bays such that the pump can be moved toward the pump support platform until the legs are within their respective bays, the pump being then rotatable by hand until each leg of the pump reaches a respective end of each slot, wherein during installation of the pump on the pump support platform, at least one leg of the pump rides against and then past the quick-release locking arm until the quick-release locking arm clears the leg and snaps under spring bias to a position to prevent the pump from being removed from the pump support platform.

2. The pump assembly of claim 1, wherein the pump locking bore removably engages the pump.

3. The system of claim 1, wherein the pump is a diaphragm pump.

4. The system of claim 1, wherein the pump support platform includes an overflow bore through which any saline that may leak from the pump can flow.