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    Ultrasonic sensors for monitoring the condition of a vascular graft
    2.
    发明授权
    Ultrasonic sensors for monitoring the condition of a vascular graft 失效
    用于监测血管移植物状况的超声波传感器

    公开(公告)号：US5967989A

    公开(公告)日：1999-10-19

    申请号：US79818

    申请日：1998-05-15

    申请人： George E. Cimochowski ,  George W. Keilman

    发明人： George E. Cimochowski ,  George W. Keilman

    IPC分类号： A61B5/00 ,  A61B8/04 ,  A61B8/06 ,  A61F2/02 ,  A61M1/36 ,  A61B8/00

    CPC分类号： A61B5/6876 ,  A61B5/0031 ,  A61B5/6862 ,  A61B8/06 ,  A61B8/56 ,  A61M1/3656 ,  A61B2560/0219 ,  A61B8/04 ,  A61B8/12 ,  A61F2250/0001 ,  Y10S128/903

    摘要： A parameter indicative of the status of fluid flow is remotely monitored in a vessel, a natural graft, or a synthetic graft. One or more transducers are provided either in a wall of a synthetic graft or adjacent to a vessel or natural graft to monitor the parameter. A conformal array transducer or a tilted element is used to monitor fluid flow or velocity through the graft or vessel based on the effect of the fluid on ultrasonic waves produced by the transducers. The conformal array transducer comprises a plurality of elements that curve around the graft or vessel and are excited with an input signal provided by an implantable electronics circuit, producing ultrasonic waves that propagate into the fluid flowing within the graft or vessel. Transit time or Doppler measurements are made using an appropriate number of these transducer to determine either fluid flow or velocity. Various implantable electronic circuits are provided that enable a selected transducer to be driven and to receive an ultrasonic signal or a pressure signal indicative of the status of fluid flow monitored by the transducer. The implanted electronic circuit is connected to an implanted radio frequency (RF) coil. An external coil that is connected to a power supply and monitoring console is coupled to the implanted RF coil to convey power and receive data signals from the transducer that are indicative of the parameter being monitored.

    摘要翻译： 在血管，天然移植物或合成移植物中远程监测指示流体流动状态的参数。 一个或多个换能器提供在合成移植物的壁中或邻近血管或天然移植物以监测参数。 基于流体对由换能器产生的超声波的影响，共形阵列换能器或倾斜元件用于监测通过移植物或血管的流体流动或速度。 保形阵列换能器包括在移植物或血管周围弯曲的多个元件，并且由可植入电子电路提供的输入信号激发，产生传播到在移植物或血管内流动的流体的超声波。 使用适当数量的这些传感器进行运输时间或多普勒测量，以确定流体流速或速度。 提供了各种可植入的电子电路，其使得能够驱动所选择的换能器并且接收指示由换能器监测的流体流动的状态的超声波信号或压力信号。 植入的电子电路连接到植入式射频（RF）线圈。 连接到电源和监视控制台的外部线圈耦合到植入的RF线圈以传送功率并从传感器接收指示被监视参数的数据信号。

    Endoluminal implant with fluid flow sensing capability
    4.
    发明授权
    Endoluminal implant with fluid flow sensing capability 失效
    腔内植入物具有流体流量检测能力

    公开(公告)号：US5967986A

    公开(公告)日：1999-10-19

    申请号：US978038

    申请日：1997-11-25

    申请人： George E. Cimochowski ,  George W. Keilman

    发明人： George E. Cimochowski ,  George W. Keilman

    IPC分类号： A61B5/00 ,  A61F2/02 ,  A61F2/82 ,  A61B5/02 ,  A61B8/04

    CPC分类号： A61B5/6876 ,  A61B5/0031 ,  A61B5/6862 ,  A61F2/82 ,  A61F2250/0002

    摘要： A stent or graft stent energized from an external power source is provided with one or more sensors to sense a parameter, producing a signal that is transmitted outside a vessel in which the stent is implanted. At least a portion of a body of the stent or an insulated electrical conductor comprises a plurality of turns that serve as an RF antenna. An expandable mesh or helical coils that form the stent body may serve as the antenna or it may comprise a separate insulated conductor. The RF antenna receives energy electromagnetically coupled to the antenna from an external (or implanted) coil and conveys a data signal corresponding to the parameter sensed by the sensor(s) on the stent or stent graft to a monitor disposed outside the patient's body. In one form of the invention, a plurality of conformal array transducers are used to produce and sense ultrasonic waves that are affected by a fluid flowing through a lumen of the stent. This transducer determines fluid flow or fluid velocity. In other embodiments, one or more integrated circuit (IC) sensors are used to sense other physical or biological parameters in the proximity of the stent, producing signals that are multiplexed by an electronics circuit and transmitted to the external monitor/power supply.

    摘要翻译： 从外部电源供电的支架或移植支架设置有一个或多个传感器以感测参数，产生在其中植入支架的血管外部传输的信号。 支架的主体或绝缘电导体的至少一部分包括用作RF天线的多个匝。 形成支架主体的可膨胀网状物或螺旋线圈可以用作天线，或者它可以包括单独的绝缘导体。 RF天线从外部（或植入的）线圈接收与天线电磁耦合的能量，并将对应于传感器检测到的参数的数据信号传送到支架或支架移植物上，并将其传送到设置在患者身体外部的监视器。 在本发明的一种形式中，使用多个共形阵列换能器来产生和感测受流过支架内腔的流体影响的超声波。 该传感器确定流体流动或流体速度。 在其他实施例中，使用一个或多个集成电路（IC）传感器来感测在支架附近的其他物理或生物参数，产生由电子电路多路复用并传输到外部监视器/电源的信号。

    Ultrasonic sensors for monitoring the condition of a vascular graft
    5.
    发明授权
    Ultrasonic sensors for monitoring the condition of a vascular graft 失效

    公开(公告)号：US5807258A

    公开(公告)日：1998-09-15

    申请号：US949413

    申请日：1997-10-14

    申请人： George E. Cimochowski ,  George W. Keilman

    发明人： George E. Cimochowski ,  George W. Keilman

    IPC分类号： A61B5/00 ,  A61B8/04 ,  A61B8/06 ,  A61F2/02 ,  A61M1/36 ,  A61B5/02

    CPC分类号： A61B5/6876 ,  A61B5/0031 ,  A61B5/6862 ,  A61B8/06 ,  A61B8/56 ,  A61M1/3656 ,  A61B2560/0219 ,  A61B8/04 ,  A61B8/12 ,  A61F2250/0001 ,  Y10S128/903

    摘要： A parameter indicative of the status of fluid flow is remotely monitored in a vessel, a natural graft, or a synthetic graft. One or more transducers are provided either in a wall of a synthetic graft or adjacent to a vessel or natural graft to monitor the parameter. A conformal array transducer or a tilted element is used to monitor fluid flow or velocity through the graft or vessel based on the effect of the fluid on ultrasonic waves produced by the transducers. The conformal array transducer comprises a plurality of elements that curve around the graft or vessel and are excited with an input signal provided by an implantable electronics circuit, producing ultrasonic waves that propagate into the fluid flowing within the graft or vessel. Transit time or Doppler measurements are made using an appropriate number of these transducer to determine either fluid flow or velocity. Various implantable electronic circuits are provided that enable a selected transducer to be driven and to receive an ultrasonic signal or a pressure signal indicative of the status of fluid flow monitored by the transducer. The implanted electronic circuit is connected to an implanted radio frequency (RF) coil. An external coil that is connected to a power supply and monitoring console is coupled to the implanted RF coil to convey power and receive data signals from the transducer that are indicative of the parameter being monitored.

    Ultrasonic sensors for monitoring the condition of flow through a cardiac valve
    6.
    发明授权
    Ultrasonic sensors for monitoring the condition of flow through a cardiac valve 失效
    超声波传感器用于监测通过心脏瓣膜的流量状况

    公开(公告)号：US06398734B1

    公开(公告)日：2002-06-04

    申请号：US09373445

    申请日：1999-08-12

    申请人： George E. Cimochowski ,  George W. Keilman

    发明人： George E. Cimochowski ,  George W. Keilman

    IPC分类号： A61B812

    CPC分类号： A61B8/06 ,  A61B5/0031 ,  A61B5/6876 ,  A61B5/6884 ,  A61B8/04 ,  A61B8/12 ,  A61B8/4227 ,  A61B8/4472 ,  A61B8/56 ,  A61B2560/0219 ,  A61M1/3656

    摘要： A parameter indicative of the condition of a cardiac valve is determined by monitoring blood flow and/or velocity in a vessel that is coupled to the cardiac valve or in a chamber adjacent to an artificial cardiac valve. One or more ultrasonic transducers are provided either in a wall or a cuff disposed about a cardiac vessel to monitor the parameter in regard to a natural or artificial cardiac valve, or in a support sewing ring of an artificial cardiac valve. A conformal array transducer or a tilted element is used to monitor fluid flow or velocity based on the effect of the blood on ultrasonic waves produced by the transducers. The conformal array transducer comprises a plurality of elements that are excited with an input signal provided by an implantable electronics circuit, producing ultrasonic waves. Transit time or Doppler measurements are made using an appropriate number of these transducers to determine either blood volumetric flow or velocity. Various implantable electronic circuits are disclosed that enable a transducer to be driven and to receive an ultrasonic signal indicative of the status of blood flow and thus, the condition of the cardiac valve. A radio frequency (RF) coil is coupled to an external coil. The external coil is connected to a power supply and monitoring console, conveying power to the ultrasonic transducers and receiving data signals that enable the condition of the cardiac valve to be determined.

    摘要翻译： 通过监测联接到心脏瓣膜或邻近人造心脏瓣膜的腔室的血管中的血流和/或速度来确定指示心脏瓣膜状况的参数。 一个或多个超声波换能器设置在围绕心脏血管设置的壁或袖带中，以监测关于天然或人造心脏瓣膜的参数，或在人造心脏瓣膜的支撑缝合环中。 根据血液对由换能器产生的超声波的影响，使用保形阵列换能器或倾斜元件来监测流体流动或速度。 共形阵列换能器包括由可植入电子电路提供的输入信号激励的多个元件，产生超声波。 使用适当数量的这些传感器进行运输时间或多普勒测量，以确定血液体积流量或速度。 公开了各种可植入的电子电路，其能够驱动换能器并接收指示血流状态的超声波信号，并因此接收心脏瓣膜的状况。 射频（RF）线圈耦合到外部线圈。 外部线圈连接到电源和监视控制台，向超声波换能器输送功率，并接收能够确定心脏瓣膜状态的数据信号。