Oryotherapy apparatus

Details Oryotherapy apparatus Oryotherapy apparatus

1979-06-07

1981-07-28

Michell, Robert W.

Surgery

Truss

Pad

62 52, 62514R, A61B 1738

Patent

active

042804990

ABSTRACT:
Cryotherapy apparatus for effecting localised cooling of body tissue comprises an intensively cooled hollow probe extending from a handle. Cooling of the probe is effected by refrigerant passed through a capillary tube in the probe to expand and evaporate in a chamber near the probe tip. Passages in the probe and handle serve to supply and exhaust refrigerant from the capillary tube and chamber respectively. In order to prevent excessive cooling of the handle, automatic means are provided which upon the handle temperature falling below a threshold value are arranged to energise a pressure reducing valve to restrict refrigerant flow to the probe and simultaneously energise heating elements provided at the entry of the valve and in the handle.

REFERENCES:
patent: 1476699 (1923-12-01), Fabret
patent: 3393679 (1968-07-01), Crump et al.
patent: 3439680 (1969-04-01), Thomas
patent: 3507283 (1970-04-01), Thomas
De Boo et al., Integrated Circuits & Semiconductor Devices pp. 117 and FIG. 7-21 (1977). TK 7871.85 D43.

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