Methods and apparatus of applying intra-lesional cryotherapy

Details Methods and apparatus of applying intra-lesional cryotherapy Methods and apparatus of applying intra-lesional cryotherapy

1987-06-22

1989-02-07

Hindenburg, Max

Surgery

Truss

Pad

128DIG27, A61B 1736

Patent

active

048024759

ABSTRACT:
There is described a method of performing intra-lesional cryosurgery utilizing a specifically shaped tubular needle having a front piercing surface coextensive with an opening. The needle is introduced into the skin from one point and runs through deeper tissues based on the surface orientation of the needle. The piercing surface of the needle is directed through a second point where it emerges from the skin. The needle as indicated is a hollow tubular member and has one end which is adapted to receive a source of a cryrogen gas. The gas is passed through the needle and produces a lowering of the needle temperature. This low temperature is directed to the surrounding tissues to form an ice cylinder about the imbedded part of the needle in the deeper tissues. This ice cylinder affords to selectively freeze the tissue and thereby destroys the lesion being treated. A plurality of different shaped needles are shown to accommodate different types and different depth lesions. Some needles are also selectively insulated at various portions to cause the uninsulated portion of the needle to selectively apply freezing temperatures to tissues in selective directions.

REFERENCES:
patent: 3434477 (1969-03-01), Thomas
patent: 3608539 (1971-09-01), Miller
patent: 3712306 (1973-01-01), Bryne
patent: 3889618 (1975-06-01), Waller et al.
patent: 4275734 (1981-06-01), Mitchiner
patent: 4306568 (1981-12-01), Torre

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