Specialized perfusion protocol for whole-body hyperthermia

• US 5,354,277 A
• Filed: 09/04/1992
• Issued: 10/11/1994
• Est. Priority Date: 09/04/1992
• Status: Expired due to Term

• Current Assignee: Thermasolutions
• Original Assignee: Biocontrol Technology Inc. (Touchpoint Group Holdings, Inc.)
• Inventors: Cosio, Miguel P., Guzman, Joseph A.
• Primary Examiner(s): Hafer, Robert A.
• Assistant Examiner(s): RIMELL, SAMUEL G
• Application Number:
  US07/940,546
• Time in Patent Office: 767 Days
• Field of Search: 604/4, 604/5, 604/6, 604/113, 604/114, 604/19, 604/27, 604/28
• US Class Current: 604/113
• CPC Class Codes: A61F 7/12 Devices for heating or cooling internal body cavities
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1696 with dialysate regeneration
• CPC Class Codes: A61M 1/3486 Biological, chemical treatment, e.g. chemical precipitation; treatment by absorbents
• CPC Class Codes: A61M 1/3493 using treatment agents in suspension
• CPC Class Codes: A61M 1/369 Temperature treatment
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 2205/366 by liquid heat exchangers

Abstract

A method for extracorporeal blood treatment which utilizes a hemodialysis machine capable of heating the dialysis fluids to 48° C., a hollow-fiber, high efficiency hemodialyzer, and a tubular heat exchanger--in addition to various probes and catheters and heated anterior and posterior blankets for the patient--to effect extracorporeal treatment without adverse effect on blood physiology and without the need for general anesthesia.

Claims

1. A method for the extracorporeal heating of blood in a human in which extracorporeal hyperthermia is indicated, comprising the steps of:

catheterizing a blood vessel of a patient and creating an extracorporeal blood circuit;

heating at least some of the blood in the extracorporeal blood circuit; and

subjecting at least some of the blood in the extracoporeal blood circuit to hemodialysis, wherein said heating step further comprises heating at least some of the blood in the extracorporeal blood circuit by elevating the temperature of a dialyzing solution used in the hemodialysis step to about 48°

C.

2. The method according to claim 1 wherein said heating step further comprises heating all of the blood in the extracorporeal blood circuit so as to raise the core temperature of said patient to approximately 41.5°

-42°

C.

3. The method according to claim 2 wherein said extracorporeal blood circuit includes a tubular heat exchanger.

4. The method according to claim 3 wherein said extracorporeal blood circuit includes a stopcock.

5. The method according to claim 4 wherein said hemodialysis is effected by means of a hollow-fiber, high flux dialyzer.

6. The method according to claim 5 wherein said heating step further includes heating the body of said patient with a heated mattress.

7. The method according to claim 6 wherein said heating step further includes heating the body of said patient with a heated blanket.

8. The method according to claim 7 wherein said extracorporeal blood circuit is pumped by means of a pump upstream of a hemodialysis machine and its associated dialyzer.

9. The method according to claim 8 wherein an air filter is positioned in line with said dialyzer and said air filter removes any air emboli which may be circulating in the system.

10. A method for the extracorporeal heating of blood in an animal in which extracorporeal hyperthermia is indicated, comprising the steps of:

catheterizing a blood vessel of an animal and creating an extracorporeal blood circuit;

heating at least some of the blood in the extracorporeal blood circuit; and

subjecting at least some of the blood in the extracorporeal blood circuit to hemodialysis, wherein said heating step further comprises heating at least some of the blood in the extracorporeal blood circuit by elevating the temperature of a dialyzing solution used in the hemodialysis step to about 48°

C.

11. The method according to claim 10 wherein said heating step further comprises heating all of the blood in the extracorporeal blood circuit so as to raise the core temperature of said animal to approximately 41.5°

-42°

C.

12. The method according to claim 11 wherein said extracorporeal blood circuit includes a tubular heat exchanger.

13. The method according to claim 12 wherein said extracorporeal blood circuit includes a stopcock.

14. The method according to claim 13 wherein said hemodialysis is effected by means of a hollow-fiber, high flux dialyzer.

15. The method according to claim 14 wherein said heating step further includes heating the body of said animal with a heated mattress.

16. The method according to claim 15 wherein said heating step further includes heating the body of said animal with a heated blanket.

17. The method according to claim 16 wherein said extracorporeal blood circuit is pumped by means of a pump upstream of a hemodialysis machine and its associated dialyzer.

18. The method according to claim 17 wherein an air filter is positioned in line with said dialyzer and said air filter removes any air emboli which may be circulating in the system.