Surgery – Body protecting or restraining devices for patients or infants – Drapes
Patent
1995-05-19
1999-05-11
Dawson, Glenn K.
Surgery
Body protecting or restraining devices for patients or infants
Drapes
128849, 606 22, A61B19/08;17/36
Patent
active
059017074
ABSTRACT:
A cryosurgery mask permits the continuous application of coolant during cryosurgery. Cryosurgery employs the application of a coolant, such as liquid nitrogen (LN), to a target tissue to effect the removal thereof. The target tissue normally includes diseased tissue, along with a safety margin of adjacent tissue. The cryosurgery mask includes a flexible sheet having a non-adhesive upper surface and a lower skin-facing surface of a silicone gel composition which remains adherent to skin at cryosurgery temperature. A release film is releasably affixed to the skin-facing surface to protect against contamination. In operation, a hole, dimensioned to encircle both the diseased tissue and a safety margin of adjacent normal tissue, is removed from the sheet. The release film is removed and the hole is positioned over the target tissue. The gel layer adjacent to and surrounding the hole is pressed against the skin. A constant spray of LN may then be applied to the target tissue to effect freezing. The gel surface adheres to the skin forming a barrier and preventing LN from freezing non-target tissue. The mask permits the rapid cooling of diseased tissue to a desired depth, while minimizing damage to non-target tissue.
REFERENCES:
patent: 3658066 (1972-04-01), Saidi et al.
patent: 4601286 (1986-07-01), Kaufman
Dawson Glenn K.
HPL Biomedical, Inc.
Petit Michael G.
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