Cooling system

• US 6,730,115 B1
• Filed: 11/16/1998
• Issued: 05/04/2004
• Est. Priority Date: 05/16/1996
• Status: Expired due to Fees

• Current Assignee: Huntleigh Technology, Inc.
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Heaton, Keith Patrick
• Primary Examiner(s): ROLLINS, ROSILAND STACIE
• Application Number:
  US09/193,071
• Time in Patent Office: 1,996 Days
• Field of Search: 607/96, 607/104, 607/107, 607/108, 607/112, 542/1, 542/3, 548/2, 594/1, 570/6, 571/0
• US Class Current: 607/104
• CPC Class Codes: A47C 21/044 with active means, e.g. by using air blowers or liquid pumps
• CPC Class Codes: A61F 2007/0064 of gas
• CPC Class Codes: A61F 2007/0086 with a thermostat
• CPC Class Codes: A61F 2007/0091 inflatable
• CPC Class Codes: A61F 2007/0095 with a temperature indicator
• CPC Class Codes: A61F 7/0097 Blankets with active heating or cooling sources warming mats A61F7/08
• CPC Class Codes: A61F 7/10 Cooling bags, e.g. ice-bags
• CPC Class Codes: Y10S 5/941 Blanket with forced air flow

Abstract

A cooling system for cooling a person in a supine position as part of a clinical treatment includes an air blower, a heat exchanger, an inflatable mattress and a cooling jacket or overlay. Air from the blower is cooled by contact with the heat exchanger, passed through the jacket or overlay and through the mattress in order to rapidly cool the person so as to achieve mild hypothermia.

Claims

1. A therapeutic combination for cooling a person'"'"'s body while supporting the person in a supine position, said therapeutic combination comprising:

an inflatable mattress system for supporting a person in a supine position;

an inflatable cooling layer adapted to overlay the person while the person is supported upon said inflatable mattress system;

a source of pressurized fluid in communication with said inflatable mattress system and said inflatable cooling layer, said source being adapted to inflate said inflatable mattress system and to provide cooling fluid to said inflatable mattress system and said inflatable cooling layer; and

said therapeutic combination being adapted to cool the person'"'"'s core body temperature to a temperature of about 32 to 34°

C.

2. The therapeutic combination as recited in claim 1, wherein said inflatable mattress system comprises a mattress overlay.

3. The therapeutic combination as recited in claim 1, wherein said inflatable cooling layer is adapted to cover at least the torso portion of the patient.

4. The therapeutic combination as recited in claim 3, wherein said inflatable cooling layer comprises a cooling jacket.

5. The therapeutic combination as recited in claim 4, wherein said cooling jacket comprises a plurality of apertures, said apertures being adapted to allow the passage of fluid from within to without said cooling jacket and thereby further cooling the patient'"'"'s body.

6. The therapeutic combination as recited in claim 3, wherein said inflatable cooling layer comprises a cooling blanket.

7. The therapeutic combination as recited in claim 4, wherein said cooling blanket comprises a plurality of apertures, said apertures being adapted to allow the passage of fluid from within to without said cooling blanket and thereby further cooling the patient'"'"'s body.

8. The therapeutic combination as recited in claim 1, wherein said inflatable mattress system comprises a plurality of compartments.

9. The therapeutic combination as recited in claim 8, wherein each said compartment is a sac in a low air loss mattress system.

10. The therapeutic combination as recited in claim 8, wherein each said compartment is separately inflatable.

11. The therapeutic combination as recited in claim 10, said therapeutic combination further comprising at least one valve interposed between said source of pressurized fluid and said inflatable mattress system.

12. The therapeutic combination as recited in claim 11, wherein said valve is adapted to control the inflation pressure of the fluid delivered from said source to said mattress system.

13. The therapeutic combination as recited in claim 12, wherein said valve is further adapted to control the temperature at the surface of said mattress system.

14. The therapeutic combination as recited in claim 13, said therapeutic combination further comprising a plurality of valves interposed between said source and said mattress system.

15. The therapeutic combination as recited in claim 14, wherein at least one said valve is interposed between said source and each said compartment.

16. The therapeutic combination as recited in claim 11, wherein said source of pressurized fluid is adapted to achieve a temperature of less than about 10°

C. at the surface of said inflatable mattress system.

17. The therapeutic combination as recited in claim 1, said therapeutic combination further comprising:

a refrigeration circuit for producing a cooled media; and

a heat exchanger, said heat exchanger being adapted to cool the fluid from said source of pressurized fluid by association with said cooled media produced by said refrigeration circuit.

18. The therapeutic combination as recited in claim 17, said therapeutic combination further comprising:

a temperature sensor associated with the surface of said inflatable mattress system for measuring the surface temperature of said mattress system; and

a controller associated with said heat exchanger and said temperature sensor, said controller being adapted to adjust the temperature of the pressurized fluid passed through said heat exchanger in response to the temperature measured at the surface of said mattress system.

19. The therapeutic combination as recited in claim 18, wherein said temperature sensor comprises a thermistor positioned at an outlet from said heat exchanger.

20. The therapeutic combination as recited in claim 1, said therapeutic combination further comprising a confining system adapted to restrain the person on said inflatable mattress system during the provision of cooling therapy.

21. A therapeutic combination for cooling a person'"'"'s body while supporting the person in a supine position, said therapeutic combination comprising:

an inflatable mattress system for supporting a person in a supine position;

a layer adapted to overlay and form an enclosure over the person while the person is supported upon said inflatable mattress system;

a source of pressurized fluid in communication with said inflatable mattress system, said source being adapted to inflate said inflatable mattress system and to provide cooling fluid to said inflatable mattress system and said enclosure; and

said therapeutic combination being adapted to cool the person'"'"'s core body temperature to a temperature of about 32 to 34°

C.

22. A therapeutic combination for cooling a person'"'"'s body while supporting the person in a supine position, said therapeutic combination comprising:

an inflatable mattress system for supporting a person in a supine position;

an inflatable cooling layer adapted to overlay the person while the person is supported upon said inflatable-mattress system;

a source of pressurized and refrigerated air in communication with said inflatable mattress system and said inflatable cooling layer, said source being adapted to inflate said inflatable mattress system and to provide a flow of refrigerated air through said inflatable mattress system and through said inflatable cooling layer; and

whereby said therapeutic combination is adapted to cool the person'"'"'s core body temperature to a temperature of about 32 to 34°

C.

23. The therapeutic combination as recited in claim 22, wherein said refrigerated air is cooled to a temperature of less than about 3°

C.