CRYOTREATMENT DEVICE USING A SUPERCRITICAL GAS

申请公布号：

WO2011026215(A1)

申请号：

WO2010CA01251

申请日期：

2010.08.16

申请公布日期：

2011.03.10

申请人：

MEDTRONIC CRYOCATH LP

发明人：

LALONDE, JEAN-PIERRE

分类号：

A61F7/00;A61B1/12;A61F7/12;A61M5/44;C09K5/04

主分类号：

A61F7/00

摘要：

A method of cryogenically treating a tissue region is provided, including positioning a treatment region of a medical device proximate the tissue region; transferring coolant in a substantially liquid phase from a coolant reservoir to a subcooler; transitioning the coolant from the liquid phase into a supercritical state; transferring the supercritical coolant to the treatment region; changing the coolant from the supercritical state to at least one of a liquid phase and a gaseous phase at the treatment region; ablating the tissue region; and evacuating coolant from the treatment region of the medical device.