Method of controlling the temperature of gasses passing through a Joule-Thomson orifice
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United States of America Patent
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Apr 8, 2008
Grant Date -
Nov 3, 2005
app pub date -
Apr 4, 2005
filing date -
Sep 27, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to apparatus, systems, and methods utilizing cryogenic cooling in an angioplasty balloon catheter for treatment of arterial stenosis and prevention of restenosis. More particularly, the present invention relates to an angioplasty balloon catheter utilizing expansion of compressed gas to effect Joule-Thomson cooling of an angioplasty balloon, and optionally further incorporating external temperature sensors utilizable to identify a locus for treatment of arterial stenosis. The present invention further relates to angioplasty treatment systems incorporating such a catheter, and to cryogenic angioplasty methods for treating arterial stenosis and discouraging restenosis.
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