Method and apparatus for extracorporeal blood treatment

• US 5,104,373 A
• Filed: 07/19/1990
• Issued: 04/14/1992
• Est. Priority Date: 09/22/1988
• Status: Expired due to Term

• Current Assignee: Hemavation LLC
• Original Assignee: American Immuno Tech, Inc.
• Inventors: Lechtman, Max D., Roohk, Henry V., Davidner, Alan A.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Owens, Kerry
• Application Number:
  US07/555,097
• Time in Patent Office: 635 Days
• Field of Search: 604/4-6
• US Class Current: 604/6.08
• CPC Class Codes: A61M 1/36 Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
• CPC Class Codes: A61M 1/3603 in the same direction
• CPC Class Codes: A61M 1/3681 by irradiation
• CPC Class Codes: A61M 1/369 Temperature treatment

Abstract

Disclosed is a multimodal method and apparatus for extracorporeally treating certain blood borne infections, such as the infection of T-lymphocytes with the Human Immunodeficiency Virus. The method and apparatus of the invention includes (a) hyperthermic, (b) mechanical shear inducing, and (c) irradiation treatment modalities. These three treatment modalities may be carried out separately, in any order, or simultaneously, in any combination. The irradiation treatment mode preferably includes methods and means for subjecting at least a fraction of the blood to ultraviolet and/or x-ray and/or laser radiation. Before the blood is withdrawn from the human subject a chemical agent such as heparin may be administered to the subject for purposes of inducing lymphocyte migration from the lymph system into the circulatory system. Following extraction of a desired maximal volume of blood from the human subject, volume extenders may be mixed with the blood, thereby adjusting the extracorporeal blood volume as required or desired. Following completion of the extracorporeal treatment(s) the treated blood is returned to the patient.

Claims

1. A method for extracorporeal hyperthermic treatment of blood, said method comprising the steps of:

withdrawing a quantity of blood from a human subject;

extracorporeally adjusting the temperature of said quantity of blood to 41.0°

-42.5°

C.;

extracorporeally adjusting the pH of said quantity of blood to 7.2+/-0.1 at 41.0°

-42.5°

C.;

maintaining said quantity of blood at the adjusted temperature of 41.0°

-42.5°

C. and at the adjusted pH of 7.2+/-0.1 under low flow conditions for a period of time sufficient to accomplish the desired therapeutic effect; and

reinfusing said quantity of blood into the human subject.

2. The method of claim 1 further comprising the step of administering at least one chemical agent operative to cause migration of lymphocytes into the circulatory system of the human subject prior to said withdrawal of a quantity of blood therefrom.

3. The method of claim 2 wherein the chemical agent comprises a pharmaceutically acceptable preparation of heparin.

4. The method of claim 2 further comprising the addition of at least one volume extending agent to adjust the extracorporeal blood volume following withdrawal thereof from the human subject.