利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

9 条记录 (耗时 0.019 秒)

    Device for heating tissue in a patient's body
    5.
    发明授权
    Device for heating tissue in a patient's body 失效
    用于加热患者身体中的组织的装置

    公开(公告)号：US5191883A

    公开(公告)日：1993-03-09

    申请号：US527047

    申请日：1990-05-22

    申请人： Charles D. Lennox ,  Richard A. Noddin ,  Ronald Sahatjian

    发明人： Charles D. Lennox ,  Richard A. Noddin ,  Ronald Sahatjian

    IPC分类号： A61B17/00 ,  A61B17/22 ,  A61B18/04 ,  A61B18/08

    CPC分类号： A61B18/08 ,  A61B18/082 ,  A61B17/22 ,  A61B2017/00084 ,  A61B2017/00088 ,  A61B2017/00132 ,  A61B2017/00274 ,  A61B2017/22062 ,  A61B2018/0022 ,  A61B2018/00547 ,  A61B2018/00559 ,  A61B2018/00577 ,  A61B2018/00791 ,  A61B2018/044

    摘要： Device and method for heating tissue, the device having a catheter shaft for insertion into a patient's body, a chamber formed by a collapsible balloon mounted on the catheter shaft and filled with an electrically conductive fluid, two or more electrical contacts enclosed within the chamber, a power supply for applying an electrical potential to the contacts, and a two or more conductors for connecting each of the contacts to the power supply. The fluid is heated on the basis of I.sup.2 R losses by a radio frequency electric current flowing between the electrodes, and the fluid in turn heats the surrounding tissue by heat transfer through the wall of the chamber. According to the method, the apparatus is inserted into the patient's body, the chamber is filled with an electrically conductive fluid, and an electrical potential is applied to the contacts. The apparatus functions as a temperature source. A thermister sensor in the balloon or in contact with tissue responds to the heating effect to control the application of the current. Advantageously, by periodic sensing of temperature, and application of controlled rf power, a preset constant temperature is maintained at the selected sensing point, either at the internal body site or the liquid within the balloon. In this way carefully controlled therapy can be conducted at constant temperature.

    摘要翻译： 用于加热组织的装置和方法，所述装置具有用于插入患者体内的导管轴，由可安装在导管轴上并填充有导电流体的可折叠气囊形成的腔室，封闭在腔室内的两个或更多个电触点， 用于向触点施加电势的电源，以及用于将每个触点连接到电源的两个或更多个导体。 基于I2R损耗，通过在电极之间流动的射频电流来加热流体，并且流体又通过腔室壁的热传递来加热周围组织。 根据该方法，将该装置插入到患者体内，对该腔室填充有导电性流体，并向触点施加电位。 该装置用作温度源。 气囊中的热敏传感器或与组织接触的热敏电阻传感器响应加热效应以控制电流的施加。 有利地，通过周期性地检测温度和施加受控射频功率，在所选择的感测点处，在内部身体部位或球囊内的液体中保持预设的恒定温度。 以这种方式，可以在恒温下进行精心控制的治疗。

    Heated balloon catheters
    7.
    发明授权
    Heated balloon catheters 失效
    加热球囊导管

    公开(公告)号：US5368591A

    公开(公告)日：1994-11-29

    申请号：US981006

    申请日：1992-11-23

    申请人： Charles D. Lennox ,  Richard A. Noddin ,  Ronald Sahatjian

    发明人： Charles D. Lennox ,  Richard A. Noddin ,  Ronald Sahatjian

    IPC分类号： A61B17/00 ,  A61B17/22 ,  A61B18/04 ,  A61B18/08 ,  A61F7/12

    CPC分类号： A61B18/082 ,  A61B18/08 ,  A61B17/22 ,  A61B2017/00084 ,  A61B2017/00088 ,  A61B2017/00132 ,  A61B2017/00274 ,  A61B2017/22062 ,  A61B2018/0022 ,  A61B2018/00547 ,  A61B2018/00559 ,  A61B2018/00577 ,  A61B2018/00791 ,  A61B2018/044

    摘要： Device and method for heating tissue, the device having a catheter shaft for insertion into a patient's body, a chamber formed by a collapsible balloon mounted on the catheter shaft and filled with an electrically conductive fluid, two or more electrical contacts enclosed within the chamber, a power supply for applying an electrical potential to the contacts, and a two or more conductors for connecting each of the contacts to the power supply. The fluid is heated on the basis of I.sup.2 R losses by a radio frequency electric current flowing between the electrodes, and the fluid in turn heats the surrounding tissue by heat transfer through the wall of the chamber. According to the method, the apparatus is inserted into the patient's body, the chamber is filled with an electrically conductive fluid, and an electrical potential is applied to the contacts. The apparatus functions as a temperature source. A thermister sensor in the balloon or in contact with tissue responds to the heating effect to control the application of the current. Advantageously, by periodic sensing of temperature, and application of controlled rf power, a preset constant temperature is maintained at the selected sensing point, either at the internal body site or the liquid within the balloon. In this way carefully controlled therapy can be conducted at constant temperature.

    摘要翻译： 用于加热组织的装置和方法，所述装置具有用于插入患者体内的导管轴，由可安装在导管轴上并填充有导电流体的可折叠气囊形成的腔室，封闭在腔室内的两个或更多个电触点， 用于向触点施加电势的电源，以及用于将每个触点连接到电源的两个或更多个导体。 基于I2R损耗，通过在电极之间流动的射频电流来加热流体，并且流体又通过腔室壁的热传递来加热周围组织。 根据该方法，将该装置插入到患者体内，对该腔室填充有导电性流体，并向触点施加电位。 该装置用作温度源。 气囊中的热敏传感器或与组织接触的热敏电阻传感器响应加热效应以控制电流的施加。 有利地，通过周期性地检测温度和施加受控射频功率，在所选择的感测点处，在内部身体部位或球囊内的液体中保持预设的恒定温度。 这样可以在恒温下进行精心控制的治疗。

    Acoustic imaging catheter and the like
    8.
    发明授权
    Acoustic imaging catheter and the like 失效
    声像成像导管等

    公开(公告)号：US4951677A

    公开(公告)日：1990-08-28

    申请号：US171039

    申请日：1988-03-21

    申请人： Robert J. Crowley ,  Lucien A. Couvillon, Jr. ,  John E. Abele

    发明人： Robert J. Crowley ,  Lucien A. Couvillon, Jr. ,  John E. Abele

    IPC分类号： A61B8/12

    CPC分类号： A61B5/6848 ,  A61B8/12 ,  A61B8/445 ,  A61B8/4461 ,  A61B10/02 ,  A61B2018/00208 ,  A61B2018/1861

    摘要： Acoustic imaging catheters formed by a disposable liquid-confining sheath supporting a high fidelity, flexible drive shaft which carries on its end an ultrasound transducer. The shaft and transducer rotate with sufficient speed and fidelity to produce real time images on a T.V. screen. Special features that contribute to the high fidelity of the drive shaft include the particular multifilar construction of concentric, oppositely wound, interfering coils, a preloaded torque condition on the coils enhancing their interfering contact, and dynamic loading of the distal end of the probe, preferrably with viscous drag. The coil rotating in the presence of liquid in the sheath is used to produce a desirable pressure in the region of the transducer. Numerous selectable catheter sheaths are shown including a sheath with an integral acoustically-transparent window, sheaths with end extensions that aid in positioning, a liquid injection-producing sheath, a sheath having its window section under tension employing an axially loaded bearing, a sheath carrying a dilatation or positioning balloon over the transducer, a sheath carrying a distal rotating surgical tool and a sheath used in conjunction with a side-viewing trocar.

    摘要翻译： 由一次性液体限制护套形成的声学成像导管，其支撑高保真，柔性的驱动轴，其承载超声换能器。 轴和传感器以足够的速度和保真度旋转，以在T.V.屏幕上产生实时图像。 有助于驱动轴的高保真度的特殊特征包括同心的，相对缠绕的干扰线圈的特定的多相结构，线圈上的预加载的转矩条件增强了它们的干涉接触以及探针的远端的动态负载 具有粘性阻力。 在鞘内存在液体的情况下旋转的线圈用于在换能器的区域产生所需的压力。 显示了许多可选择的导管鞘，其包括具有整体透声窗口的护套，具有有助于定位的端部延伸部分的护套，液体注射产生护套，具有在轴向加载的轴承的张力下的窗口部分的护套， 在换能器上的扩张或定位球囊，携带远端旋转手术工具的护套和与侧视套管针结合使用的护套。