Method for treating benign and malignant tumors utilizing radio frequency, electromagnetic radiation

• US 3,991,770 A
• Filed: 12/23/1975
• Issued: 11/16/1976
• Est. Priority Date: 01/24/1974
• Status: Expired

• Current Assignee: Harry H. Leveen
• Original Assignee: Harry H. Leveen
• Inventors: LeVeen, Harry H.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Cohen, Lee S.
• Application Number:
  US05/643,661
• Time in Patent Office: 329 Days
• Field of Search: 128/413, 128/404, 128/405, 128/419 R, 128/422, 128/399, 128/1.3-1.5
• US Class Current: 607/99
• CPC Class Codes: A61N 1/06 for high-frequency therapy
• CPC Class Codes: A61N 1/403 for thermotherapy, e.g. hyperthermia

Abstract

A method of treating tumors, both benign and malignant, such as carcinoma, sarcoma, cysts and avascular lesions, in animals, such as humans, by radio frequency heating at the location of the tumor in the host with intensity and duration sufficient to cause necrosis of the tumor tissue. Substantial damage to the surrounding normal tissue is avoided, as the surrounding normal tissue is cooled by blood flow which carries the heat away to dissipate such heat in those portions of the body not being subjected to heating.

Claims

1. A method of treating a naturally occurring tumor in a human which comprises placing the portion of the body of the human in which the tumor is located in a radio frequency electromagnetic field thereby to heat the tumor tissue in said portion of said body by absorption of energy from said radio frequency electromagnetic field for a period of time and with intensity sufficient to cause necrosis of said tumor, but insufficient to cause significant damage to the adjacent normal tissue in said field.

2. The method of claim 1 in which the body portion is placed in a radio frequency field by positioning insulated, conductive metal plates in intimate contact with the portion of the body containing the tumor such that the tumor lies between the conductive metal plates, and applying radio frequency electrical power across said plates.

3. The method according to claim 2 in which the power level of radio frequency electrical power applied across said conductive metal plates is between 50 and 250 watts, in which the time of application is between 10 and 20 minutes and in which said plates are from 2 to 4 inches in diameter.

4. The method according to claim 1 in which thetemperature of said tumor is raised above 46°

C and in which the temperature of the normal tissue adjacent the tumor is kept below 40°

C.