Apparatus and method for cryogenic inhibition of hyperplasia
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United States of America Patent
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Jun 21, 2005
Grant Date -
Feb 28, 2002
app pub date -
Oct 15, 2001
filing date -
Dec 2, 1997
priority date (Note) -
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Abstract
Post-angioplasty hyperplasia in blood vessels is treated using a cryosurgical balloon catheter. The balloon catheter is positioned at a target region within the blood vessel, and the balloon inflated by expanding a cryogenic fluid, such as liquid nitrogen, across an expansion orifice into a balloon. The balloon will be constructed so that cooling is achieved primarily in the central regions of the balloon, with the proximal and distal regions being less cold and acting to insulate adjacent regions of the blood vessel from excessive cooling.
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