Regulating pressure to lower temperature in a cryotherapy balloon catheter

    公开(公告)号:US10828080B2

    公开(公告)日:2020-11-10

    申请号:US15729039

    申请日:2017-10-10

    Abstract: A cryotherapy catheter can include an elongate member and an inflatable balloon at a distal end of the elongate member, the elongate member having lumens formed therein to supply cryogenic fluid to a chamber of the balloon and to channel exhaust from the balloon chamber; and a controller programmed to control a first rate at which the cryogenic fluid is supplied to the balloon chamber and a second rate at which exhaust is channeled from the balloon chamber, wherein the controller is programmed to a) develop, during a first phase of a cryotherapy procedure, a first pressure inside the balloon chamber at a value that is greater than an ambient pressure outside and adjacent to a proximal end of the elongate member, and b) develop, during a second phase of the cryotherapy procedure, the first pressure at a value that is less than the ambient pressure.

    REGULATING PRESSURE TO LOWER TEMPERATURE IN A CYROTHERAPY BALLOON CATHETER
    5.
    发明申请
    REGULATING PRESSURE TO LOWER TEMPERATURE IN A CYROTHERAPY BALLOON CATHETER 审中-公开
    将压力调节至低温气囊导管

    公开(公告)号:US20150018811A1

    公开(公告)日:2015-01-15

    申请号:US14502813

    申请日:2014-09-30

    Abstract: A cryotherapy catheter can include an elongate member and an inflatable balloon at a distal end of the elongate member, the elongate member having lumens formed therein to supply cryogenic fluid to a chamber of the balloon and to channel exhaust from the balloon chamber; and a controller programmed to control a first rate at which the cryogenic fluid is supplied to the balloon chamber and a second rate at which exhaust is channeled from the balloon chamber, wherein the controller is programmed to a) develop, during a first phase of a cryotherapy procedure, a first pressure inside the balloon chamber at a value that is greater than an ambient pressure outside and adjacent to a proximal end of the elongate member, and b) develop, during a second phase of the cryotherapy procedure, the first pressure at a value that is less than the ambient pressure.

    Abstract translation: 冷冻治疗导管可以包括在细长构件的远端处的细长构件和可膨胀气囊,细长构件具有形成在其中的腔,以将低温流体供应到球囊的腔室并且引导气囊腔排出; 以及控制器,其被编程为控制所述低温流体被供应到所述球囊腔室的第一速率以及从所述气囊腔室引导排气的第二速率,其中所述控制器被编程为a)在第一阶段期间, 冷冻治疗程序,气囊腔内的第一压力的值大于在细长构件的近端外部和邻近的环境压力,以及b)在冷冻治疗过程的第二阶段期间,将第一压力 一个小于环境压力的值。

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