Method and device for treatment of aneurysms
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United States of America Patent
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-
May 18, 2004
Grant Date -
Mar 27, 2003
app pub date -
Sep 26, 2001
filing date -
Sep 26, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is disclosed for treating an aneurysm by cooling a target tissue region of the aneurysm to a temperature below temperature for a preselected time period. The method entails thickening, strengthening, or increasing the density of a blood vessel wall by cooling the blood vessel wall with a cryogenically cooled device. In particular, a device having a heat conductive cooling chamber is disposed proximate to the aneurysm site; and a cryogenic fluid coolant is directed to flow inside the chamber to create endothermic cooling relative to the aneurysm. The method also promotes the growth of collagen and elastin in vascular tissue. Tissue cooling temperatures range from +20 to -20 degrees Celsius. The duration of treatment by application of cooling ranges from 15 seconds to up to 20 minutes or more. The method includes treating the aneurysm both from inside and outside the blood vessel wall forming the aneurysm.
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