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    CRYOSURGICAL PROBE WITH DISPOSABLE SHEATH
    1.
    发明公开
    CRYOSURGICAL PROBE WITH DISPOSABLE SHEATH 失效
    一次性盖冷冻治疗探头

    公开(公告)号：EP0981292A4

    公开(公告)日：2000-04-19

    申请号：EP97954809

    申请日：1997-12-19

    申请人： CRYOGEN INC

    发明人： DOBAK JOHN D III ,  GHAERZADEH KAMBIZ ,  YU XIAOYU

    IPC分类号： A61B19/02 ,  A61B17/00 ,  A61B17/42 ,  A61B18/00 ,  A61B18/02 ,  A61B18/24 ,  A61B19/00 ,  A61B1/00

    CPC分类号： A61B18/02 ,  A61B17/42 ,  A61B18/0206 ,  A61B18/24 ,  A61B2017/00084 ,  A61B2017/0023 ,  A61B2017/00336 ,  A61B2018/00041 ,  A61B2018/00095 ,  A61B2018/00101 ,  A61B2018/00166 ,  A61B2018/0212 ,  A61B2018/0262 ,  A61B2090/306 ,  A61B2090/378 ,  A61B2218/002

    摘要： This invention is a disposable, sterilized sheath (20) for use on a closed loop Joule-Thomson cryosurgical probe (10), the combination of the disposable sheath (20), and the probe (10). The sheath (20) is slipped over the probe (10), thereby separating the probe (10) from the environment. The sheath has a grip (22) which fits over the handle (12) of the probe (10), and an extendible shroud (23) that can be longitudinally extended to cover tubing (18) which is attached to the handle (12). The sheath (20) has a hollow multi-lumen catheter (24) shaped and sized to fit snugly over the cannula (14) of the probe (10). The catheter (24) is not thermally conductive, preventing transfer of heat from the ambient to the gas mixture, and preventing the freezing of tissues at undesired locations. A thermally conductive cap or tip (26) fits snugly over the cold tip (16) on the probe (12) and it efficiently transfers heat from the target tissue to the cold tip (16), which in turn transfers heat to the expanded gas mixture. Various forms of auxiliary instrumentation can be mounted on the catheter (24) or conductive tip (16), such as a temperature sensor, a heater, an ultrasonic transducer, or an optical element of a viewing illumination or laser system. Connections between the instrumentation near the distal end of the catheter (24) and the probe (10) are made via a plurality of lumens passing longitudinally through the wall of the catheter (24).

    PRECOOLING SYSTEM FOR JOULE-THOMSON PROBE
    2.
    发明公开
    PRECOOLING SYSTEM FOR JOULE-THOMSON PROBE 失效
    VORKÜHLANLAGEFÜRJOULE-THOMSON SONDE

    公开(公告)号：EP0929779A4

    公开(公告)日：2000-01-19

    申请号：EP97910818

    申请日：1997-10-07

    申请人： CRYOGEN INC

    发明人： DOBAK JOHN D III ,  BROWN TERRY L ,  GHAERZADEH KAMBIZ ,  YU XIAOYU

    IPC分类号： F25D3/10 ,  A61B18/02 ,  C09K5/04 ,  F25B7/00 ,  F25B9/00 ,  F25B9/02 ,  F25B19/02 ,  A61B17/36 ,  F25D3/00

    CPC分类号： F25B9/006 ,  A61B18/02 ,  A61B2018/0212 ,  A61B2018/0275 ,  A61B2018/0281 ,  C09K5/045 ,  C09K2205/12 ,  C09K2205/122 ,  C09K2205/13 ,  C09K2205/132 ,  F25B7/00 ,  F25B9/02 ,  F25B2309/003 ,  F25B2309/021 ,  F25B2309/022 ,  F25B2309/023 ,  F25B2400/12

    摘要： A miniature mixed gas refrigeration system and method is disclosed. A selected gas mixture is compressed to less than 420 psia for safety reasons. The compressed gas mixture is passed through a primary heat exchanger (140) and a primary/secondary heat exchanger (240) to precool the gas mixture. The secondary side of the primary/secondary heat exchanger is cooled by a secondary Joule-Thomson refrigeration system (200). Flow restrictions in the primary side of the primary/secondary heat exchanger (240) can solidify and trap liquid contaminants. The gas mixture exiting the primary outlet of the primary/secondary heat exchanger (240) passes to a primary expansion element (150) to expand isenthalpically to a to 183K or below to cool a heat transfer element. Return gas through the primary heat exchanger (140) precools the incoming high pressure gas mixture. A distal primary heat exchanger (160) can be added between the primary/secondary heat exchanger (240) and the primary expansion element (150).

    摘要翻译： 公开了一种微型混合气体制冷系统和方法。 出于安全原因，选定的气体混合物被压缩到小于420psia。 压缩的气体混合物通过主换热器（140）和主/次换热器（240）以预冷气体混合物。 主/辅热交换器的二次侧由二级焦耳 - 汤姆逊制冷系统（200）冷却。 初级/次级热交换器（240）的初级侧的流量限制可固化并截留液体污染物。 离开主/辅热交换器（240）的主出口的气体混合物传送至主膨胀元件（150），以等焓膨胀至183K或更低以冷却热传递元件。 通过主换热器（140）的返回气体预冷进入的高压气体混合物。 可以在主/辅热交换器（240）和主膨胀元件（150）之间添加远端主热交换器（160）。