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Controllable pressure cryogenic balloon treatment system and method

  • US 8,177,779 B2
  • Filed: 12/02/2005
  • Issued: 05/15/2012
  • Est. Priority Date: 06/02/2004
  • Status: Active Grant
First Claim
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1. A method for treating a region of a blood vessel, the method comprising:

  • positioning a balloon within the blood vessel and adjacent the region while the balloon is in a first configuration;

    inflating the balloon from the first configuration to the second configuration by cycling delivery valve and a vent valve, the vent valve disposed along a cooling fluid path upstream of the balloon, the inflating between the first configuration and the second configuration extending over a period of time from about 0.25 seconds to 10 seconds; and

    cooling the region to a treatment temperature with the balloon in a second configuration at a treatment pressure by changing a cooling fluid from a liquid phase to a gas phase within the balloon so as to urge the balloon radially outwardly and treat the vessel.

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