Paul R Turner

US Patent:

52209270, Jun 22, 1993

Filed:

Mar 15, 1990

Appl. No.:

7/495736

Inventors:

Melvin A. Astrahan - Los Alamitos CA
Paul F. Turner - North Salt Lake UT

Assignee:

BSD Medical Corporation - Salt Lake City UT

International Classification:

A61N 502

US Classification:

128785

Abstract:

A urethral inserted applicator for prostate electromagnetic hyperthermia includes apparatus for holding and positioning at least one electromagnetic energy applicator in a urethral passage extending through a prostate gland. The apparatus includes a multi-passage or multi-tube, balloon type urinary or Foley catheter with fluid-dry passages for insertion of microwave antenna or capacitive electrode type applicators, and an electromagnetic compatible type temperature sensor for measuring the temperature of the prostate tissue. The urinary catheter provides an open fluid receiving tube enabling urine drainage from the bladder and a balloon at the tip region of the catheter for engaging the bladder neck to properly position and hold the apparatus during treatment. An electromagnetic generator supplies electromagnetic energy to the applicators. A comparator is connected to the temperature sensor and a temperature reference potentiometer for comparing the actual tissue temperature with a desired temperature and for providing output control signals to the electromagnetic generator for controlling the output of the generator to the applicators.