Thermal seed for treatment of tumors

Details Thermal seed for treatment of tumors Thermal seed for treatment of tumors

1989-11-29

1992-07-28

Cohen, Lee S.

Surgery

Instruments

Heat application

128401, A61B 1738

Patent

active

051337100

ABSTRACT:
A heater (seed) and system for subjecting body tissue to closely controlled hyperthermia or higher temperatures includes a core of ferromagnetic material having a high resistivity or resistivity of a non-conductor enclosed with a bio-compatible non-magnetic conductive sheath and excited by a coil positioned to establish a magnetic field coupled to the seed. The core is dimensioned so as to reduce demagnetizing effects to acceptable levels. The thickness of the conductive sheath is optimized to maximize heat generation to achieve a heat generating capacity which is considerably greater than that of the bare ferromagnetic material.

REFERENCES:
patent: 1807105 (1931-05-01), Schliephaka
patent: 3653385 (1972-04-01), Burton
patent: 4545368 (1985-10-01), Rand et al.
patent: 4701587 (1987-10-01), Carter et al.
patent: 4807620 (1989-02-01), Strul et al.
Brezovich et al, "Effect of Catheters . . . Thermoseeds", IEEE, 9th Ann. Conf of the Engine Med. & Biol. Soc., 1987, vol. 3, pp. 1629-1630.
Lilly et al, "Hypertherma induction . . . implants", Radiology, vol. 154, No. 1, p. 243, Jan. 1985.
Leonard et al, "Thermoelectric Power . . . films", 1976.
Thackray et al, "Indirect heating Source . . . " Electrocomponent Sc & Tech., vol. 1, No. 2, pp. 91-96, Dec. 1974.

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