Efficient controlled cryogenic fluid delivery into a balloon catheter and other treatment devices
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United States of America Patent
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Oct 20, 2009
Grant Date -
Jun 15, 2006
app pub date -
Dec 15, 2004
filing date -
Dec 15, 2004
priority date (Note) -
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Abstract
Devices, systems, and methods efficiently dilate and/or cool blood vessels and other body tissues. Controlled cooling with balloon catheters and other probes may be effected by a change in phase of a cryogenic fluid, often after measuring a minimum pulse width for actuating an individual solenoid valve along the cooling fluid path, with the measured pulse width allowing gradual inflation of a balloon without excessive venting of cooling fluid.
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