Apparatus for connecting a heat exchanger with a fluid temperature regulation device

• US 6,257,265 B1
• Filed: 10/26/1999
• Issued: 07/10/2001
• Est. Priority Date: 10/26/1999
• Status: Expired due to Term

• Current Assignee: Smiths Medical ASD, Inc. (Smiths Group International Holdings Ltd.)
• Original Assignee: Sims Level 1 Inc. (Smiths Group International Holdings Ltd.)
• Inventors: Plaisted, Richard, MacDougall, Peter, Brunner, Charles
• Primary Examiner(s): CHAMBERS, A MICHAEL
• Application Number:
  US09/426,752
• Time in Patent Office: 623 Days
• Field of Search: 604/113, 604/118, 137/551, 137/552, 137/557, 137/340, 137/1, 251/149.5
• US Class Current: 137/1
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/366 by liquid heat exchangers
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 39/10 Tube connectors; Tube couplings A61M39/02 takes precedence; connecting needles to syringes or hubs A61M5/34; connecting catheter tubes to hubs A61M25/0014
• CPC Class Codes: A61M 5/44 having means for cooling or heating the devices or media
• CPC Class Codes: G05D 23/1931 to control the temperature of one space
• CPC Class Codes: G05D 23/24 the sensing element having a resistance varying with temperature, e.g. a thermistor
• CPC Class Codes: Y10T 137/0318 Processes
• CPC Class Codes: Y10T 137/6579 Circulating fluid in heat exchange relationship
• CPC Class Codes: Y10T 137/8175 Plural
• CPC Class Codes: Y10T 137/8326 Fluid pressure responsive indicator, recorder or alarm

Abstract

The temperature regulating device of the instant invention accurately regulates the temperature of a fluid to be sent through a conduit for either warming or cooling an infusate that is to be provided to a patient. The heater/cooler that is used for regulating the temperature of the fluid, and the fluid itself, are continuously monitored by a number of sensors, which provide feedback signals to a processor controller, to ensure that the temperature of the fluid is maintained at a desired temperature. The fluid is circulated by a pump which operation is also continuously monitored. A special connector assembly provides the inlet/outlet connection between the device and the fluid conduit. The connector assembly is constructed such that the system would operate only when the connector of the fluid conduit is correctly mated thereto. A calibration device, shaped substantially the same as the connector for the fluid conduit, when mated to the connector assembly, initiates a sequence that include the calibration and testing of various temperature sensitive components in the device.

Claims

1. A method of establishing a fluid path between a fluid temperature regulation unit whereby the temperature of a fluid is regulated and a heat exchange conduit wherethrough the temperature regulated fluid is circulated and eventually returned to said temperature regulation unit, comprising the steps of:

mounting an interface means to a given location at a wall of said temperature regulation unit for establishing a path whereby said fluid can traverse from and to said unit;

mating a connector having attached thereto said heat exchange conduit to said interface means for establishing a closed circuit for the flow of said fluid between said temperature regulation unit and said heat exchange conduit by

superposing said connector over said interface means,

engaging said connector to said interface means, and

rotating said connector coplanarly with said interface means to sealingly mate said connector to said interface means.

2. Method of claim 1, wherein said connector comprises a base having one and other ports, further comprising the steps of:

routing said fluid from said fluid temperature regulation unit to said heat exchange conduit via said one port; and

guiding said fluid from said heat exchange conduit back to said fluid temperature regulation unit via said other port.

3. Method of claim 1, wherein said rotating step further comprises the step of rotating said connector relative to said plate until a predetermined position is reached.

4. Method of claim 1, further comprising the step of:

interposing a gasket means between said interface means and said connector to prevent said fluid from leaking out of said closed circuit.

5. Method of claim 1, further comprising the step of:

activating a switch positioned relative to said interface means for enabling said fluid temperature regulation to be energized when said connector is positioned correctly relative to said interface means.

6. Method of claim 1, further comprising the steps of:

providing a sensor means relative to said interface means; and

initiating calibration and temperature tests for various components in said temperature regulation unit when said sensor means senses a temperature checking connector having been properly mated to said interface means.

11. Connector assembly of claim 4, wherein said connector comprises a base having two wings each for mating with a corresponding one of said raised portions of said housing plate, each of said wings being rotatably guided into its corresponding raised portion by the rotation of said base coplanarly relative to said housing plate, said base being properly mated with said housing plate when said base can no longer be rotated relative to said housing plate.

12. Connector assembly of claim 1, further comprising:

switch means positioned relative to said mounting means for preventing said fluid temperature regulation unit from being energized when said connector is not positioned to said predetermined location relative to said mounting means.

13. Connector assembly of claim 1, further comprising:

gasket means interposed between said mounting means and said connector to prevent leaks from said ports to thereby sealingly confine said fluid to said communications path.

7. A connector assembly for coupling a heat exchange conduit to a fluid temperature regulation unit, comprising:

means mounting to said fluid temperature regulation unit at a given location at said fluid temperature regulation unit to provide a communications path for a fluid which temperature is regulated by said unit to traverse out of and into said unit; and

a connector having coupled thereto said heat exchange conduit matable with said mounting means, said connector having one port for receiving and routing said fluid from said fluid temperature regulation unit to said heat exchange conduit and an other port for returning said fluid from said heat exchange conduit to said fluid temperature regulation unit, said one and other ports being configured in said connector to complete said communications path provided by said mounting means when said connector is demountably engaged to said mounting means, said connector being sealingly mated to said mounting means at said given location when said connector is rotated to a predetermined location coplanarly with respect to said mounting means.

8. Connector assembly of claim 7, wherein said mounting means comprises a plate mounted to an outside surface of said fluid temperature regulation unit, said plate including a pair of oppositely located raised portions each with a lead in groove, an indent being formed at the inner wall of each of said grooves;

and

wherein said connector comprises a base having two wings each for mating with a corresponding one of said raised portions, each of said wings having an extension that fits into the indent of said corresponding one raised portion so that as said base is rotated coplanarly along the plane of said plate, each of said wings is guided into its corresponding raised portion along its lead in groove, said base being determined to be properly mated with said plate when said respective extensions of said wings are mated with the indents of their corresponding raised portions.

9. Connector assembly of claim 7, wherein said connector comprises a body and said one port comprises a tubular bore internal of said body, said other port being formed by the space internal of said body surrounding said tubular bore.

10. Connector assembly of claim 7, wherein said fluid temperature regulation unit includes a housing;

and

wherein said mounting means further comprises

a back plate mounted to the interior surface of said housing, said back plate including a circular portion mating with a hole formed on said housing whereabout said back plate is mounted, a first conduit extending through said circular portion to provide a path for said fluid which temperature is regulated by said fluid temperature regulation unit to output from said unit and a second conduit extending through said base of said circular portion to provide a path for said fluid to be returned to said fluid temperature regulation unit; and

a housing plate mounted to the exterior surface of said housing and superposingly secured to said back plate, said housing plate including a pair of oppositely located raised portions each with a lead in groove.

14. Connector assembly of claim 7, further comprising:

a second gasket means positioned at the outer circumferential periphery of said connector means for preventing said fluid from escaping outside said connector assembly.

15. Connector assembly of claim 7, further comprising:

sensor means positioned relative to said mounting means for informing said temperature regulation unit that calibration and temperature tests of various components therein are to take place.

16. Connector assembly of claim 7, wherein said temperature regulation unit comprises a heat generator unit and said fluid comprises water being heated or cooled by said unit.

17. In a system having a temperature regulation unit whereby the temperature of a fluid is regulated and a heat exchange conduit wherethrough the temperature regulated fluid is routed out of and returned to said temperature regulation unit, a connector assembly for coupling said heat exchange conduit to said temperature regulation unit, comprising:

interface means mounted to a given location at a wall of said temperature regulation unit for establishing a path whereby said fluid can traverse out of and into said unit; and

a connector having attached thereto said heat exchange conduit, said connector mating with said interface means for establishing a closed circuit for the flow of said fluid between said temperature regulation unit and said heat exchange conduit, said connector having one port for receiving and routing said fluid from said fluid temperature regulation unit to said heat exchange conduit and an other port for returning said fluid from said heat exchange conduit to said fluid temperature regulation unit, said connector being sealingly mated to said interface means when said connector is rotatably positioned to a predetermined location relative to and in contact with said interface means.

18. Connector assembly of claim 17, wherein said interface means comprises a back plate mounted to the back of said wall about an opening thereat and a front plate mounted to the front of said wall about said opening, said front and back plates being coupled to each other, said back plate providing one and other passages wherethrough said fluid traverses out of and into said unit, said front plate having a pair of oppositely located raised portions each with a lead in groove, an indent being formed at the inner wall of each of said grooves;

and

wherein said connector comprises a base having two wings each for mating with a corresponding one of said raised portions of said front plate, each of said wings having an extension that fits into the indent of said corresponding one raised portion so that as said base is rotated relative to said front plate, each of said wings is guided into its corresponding raised portion along the lead in groove of said corresponding raised portion, said base being properly mated with said plate when said respective extensions of said wings are mated with the corresponding indents of said raised portions.

19. Connector assembly of claim 17, wherein said connector comprises a base and an upright extending from said base;

and

wherein said one port comprises a tubular bore internal of said base extending to the interior of said upright, and said other port comprises the space internal of said base surrounding said tubular bore and leading to the interior of said upright.

20. Connector assembly of claim 17, further comprising:

switch means positioned relative to said mounting means for preventing energization of said fluid temperature regulation unit when said connector is not positioned to said predetermined location relative to said interface means.

21. Connector assembly of claim 17, further comprising:

gasket means interposed between said interface means and said connector to maintain the flow of said fluid within said port means and to prevent leaks from said connector assembly to the environment.