Cryosurgical probe having insulating and heated sheaths

Details Cryosurgical probe having insulating and heated sheaths Cryosurgical probe having insulating and heated sheaths

1997-09-19

1999-05-25

Cohen, Lee

Surgery

Instruments

Cyrogenic application

606 21, 606 23, A61B 1736

Patent

active

059066121

ABSTRACT:
A cryosurgical probe and method for treating cancer by cryosurgically destroying cancer cells by way of an ice ball formed at the distal end of the cryosurgical probe being located in proximity to the cancerous tissue to be treated. The probe is surrounded by a thermally insulating sheath. By varying the length and thickness of the thermally insulating sheath as well as the length of the unsheathed distal tip of the probe, the size and shape of the ice ball produced by the cryosurgical probe can be controllably tailored to correspond to the size, shape and location of the cancerous tissue so as to localize the cryogenic effect. Alternatively, the size and shape of the ice ball can be controlled by surrounding the cryosurgical probe with a heated sheath having a heating element and a temperature sensor to detect the temperature to which the sheath is heated.

REFERENCES:
patent: 3911924 (1975-10-01), Zimmer
patent: 3948269 (1976-04-01), Zimmer
patent: 3971383 (1976-07-01), Van Gerven
patent: 4202336 (1980-05-01), Van Gerven
patent: 5520682 (1996-05-01), Baust et al.
patent: 5733280 (1998-03-01), Avitall

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