知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

12 条记录 (耗时 0.016 秒)

    Flow measurement system
    1.
    发明授权
    Flow measurement system 失效
    流量测量系统

    公开(公告)号：US4781525A

    公开(公告)日：1988-11-01

    申请号：US74549

    申请日：1987-07-17

    申请人： Lloyd C. Hubbard ,  Earl W. Clausen

    发明人： Lloyd C. Hubbard ,  Earl W. Clausen

    IPC分类号： A61M1/10 ,  A61M1/36 ,  G01F1/80 ,  G01N11/14 ,  F01D17/02

    CPC分类号： G01N11/14 ,  A61M1/101 ,  A61M1/3663 ,  G01F1/80

    摘要： Blood flow rate in a motor driven centrifugal blood pump is measured indirectly and non-invasively by sensing a first parameter representative of pump RPM and a second parameter representative of motor torque. The blood flow rate is computed as a function of the first and second parameters. By measuring the second parameter in a zero flow condition while the motor is being driven at a known RPM, a viscosity calibration factor is determined which is used, together with the first and second parameters in the calculation of flow rate.

    摘要翻译： 通过感测代表泵RPM的第一参数和表示电机转矩的第二参数，间接和非侵入性地测量马达驱动的离心血泵中的血流速率。 血液流量计算为第一和第二参数的函数。 通过在以已知RPM驱动电动机的情况下在零流量条件下测量第二参数，确定所使用的粘度校准因子以及流量计算中的第一和第二参数。

    Shaft driven disposable centrifugal pump
    6.
    发明授权
    Shaft driven disposable centrifugal pump 失效
    轴驱动一次性离心泵

    公开(公告)号：US4898518A

    公开(公告)日：1990-02-06

    申请号：US239526

    申请日：1988-08-31

    申请人： Lloyd C. Hubbard ,  Earl W. Clausen

    发明人： Lloyd C. Hubbard ,  Earl W. Clausen

    IPC分类号： A61M1/10 ,  F04D29/08 ,  F04D29/12 ,  F04D29/62

    CPC分类号： A61M1/101 ,  A61M1/1025 ,  F04D29/086 ,  F04D29/126 ,  F04D29/628 ,  F05B2260/303 ,  Y10S415/90

    摘要： A disposble centrifugal pump has two parts. One part includes a blood pumping chamber and a driven impeller, while the second part includes an impeller drive to which the impeller is coupled by mechanical shaft couplings. Two seals are provided to limit exposure of the fluid being pumped to possible contaminants. The first seal provides an effective shaft seal around the impeller shaft as it leaves the pumping chamber. The second seal provides an effective seal about all outer portions of the shaft when the shaft is coupled to the impeller drive to limit migration of possible contaminants along the shaft and into the pumping chamber.

    摘要翻译： 一次性离心泵有两部分。 一部分包括血液泵腔和从动叶轮，而第二部分包括叶轮驱动器，叶轮通过机械轴联接器联接到叶轮驱动器。 提供两个密封件以限制被泵送的流体暴露于可能的污染物。 当离开泵送室时，第一密封件在叶轮轴周围提供有效的轴密封。 当轴联接到叶轮驱动器时，第二密封件围绕轴的所有外部部分提供有效的密封，以限制可能的污染物沿轴并进入泵送室的迁移。

    Doppler system for measurement of blood flow during cardiopulmonary bypass and ventricular assist
    7.
    发明授权
    Doppler system for measurement of blood flow during cardiopulmonary bypass and ventricular assist 失效
    用于测量体外循环和心室辅助期间血流量的多普勒测量系统

    公开(公告)号：US4690002A

    公开(公告)日：1987-09-01

    申请号：US863128

    申请日：1986-05-14

    申请人： Lloyd C. Hubbard ,  Earl W. Clausen

    发明人： Lloyd C. Hubbard ,  Earl W. Clausen

    IPC分类号： A61B8/06 ,  G01F1/66

    CPC分类号： G01F1/663

    摘要： An ultrasonic Doppler flow measurement system for measuring blood flow in a polymer conduit includes an ultrasonic transmitter transducer, an ultrasonic receiver transducer, an amplifier/detector circuit for producing a Doppler signal which varies in frequency as a function of blood velocity, a clipping circuit, an automatic gain control circuit, and a frequency-to-voltage converter which produces an output signal having a voltage which is a function of flow velocity. The automatic gain control circuit accomodates variations in Doppler signal strength due to varying red blood cell concentration. The clipping circuit prevents an inordinate reduction of gain by the automatic gain control circuit due to extremely large, occasional gas bubbles or fat globules in the blood.

    摘要翻译： 一种用于测量聚合物导管中的血流的超声波多普勒流测量系统包括超声波发射器换能器，超声波接收器换能器，用于产生作为血液速度的函数频率变化的多普勒信号的放大器/检测器电路，限幅电路， 一个自动增益控制电路和一个产生具有作为流速函数的电压的输出信号的频率 - 电压转换器。 自动增益控制电路由于红细胞浓度的变化而适应多普勒信号强度的变化。 削波电路可防止由于血液中极大的偶尔的气泡或脂肪球引起的自动增益控制电路的增益的过度降低。

    Blood reservoir/pump
    8.
    发明授权
    Blood reservoir/pump 失效
    血库/泵

    公开(公告)号：US4936759A

    公开(公告)日：1990-06-26

    申请号：US300265

    申请日：1989-01-23

    申请人： Earl W. Clausen ,  Lloyd C. Hubbard

    发明人： Earl W. Clausen ,  Lloyd C. Hubbard

    IPC分类号： A61M1/10 ,  A61M1/36 ,  F04D13/16 ,  F04D29/04 ,  F04D29/043 ,  F04D29/046 ,  F04D29/047 ,  F04D29/42 ,  F04D29/62

    CPC分类号： F04D29/047 ,  A61M1/1006 ,  A61M1/101 ,  A61M1/3627 ,  F04D13/16 ,  F04D29/043 ,  F04D29/0467 ,  F04D29/426 ,  F04D29/628 ,  A61M2209/082 ,  Y10S128/03

    摘要： A combined blood reservoir/pump for heart/lung bypass surgery includes a chamber having an upper reservoir chamber and a lower pump chamber with a passage connecting the reservoir chamber and the pump chamber. An inlet positioned adjacent an upper end of the housing supplies blood to the reservoir. An impeller is positioned in the pump chamber and is driven by a shaft which has its lower end connected to the impeller and an upper end connected to a drive motor which is mounted near the top end of the housing. An outlet is connected to the pump chamber for supplying blood from the combination blood reservoir/pump.

    摘要翻译： 用于心/肺旁路手术的组合储血器/泵包括具有上储存室的腔室和具有连接储存室和泵室的通道的下泵室。 位于壳体上端附近的入口将血液供应到储存器。 叶轮定位在泵室中并且由其下端连接到叶轮的轴驱动，并且上端连接到安装在壳体顶端附近的驱动马达。 出口连接到泵室，用于从组合血液储存器/泵供应血液。

    Centrifugal blood pump with backflow detection
    9.
    发明授权
    Centrifugal blood pump with backflow detection 失效
    离心泵具有回流检测功能

    公开(公告)号：US4778445A

    公开(公告)日：1988-10-18

    申请号：US936975

    申请日：1986-11-28

    申请人： Lloyd C. Hubbard ,  Earl W. Clausen

    发明人： Lloyd C. Hubbard ,  Earl W. Clausen

    IPC分类号： A61M1/10 ,  A61M1/36 ,  A61M1/03 ,  F04B49/00

    CPC分类号： A61M1/101 ,  A61M1/3663

    摘要： A heart/lung bypass system having a centrifugal blood pump driven by a motor detects reverse flow conditions in which blood is flowing from the load to the pump outlet. An alarm control provides an alarm signal based upon a flow magnitude signal, a pump speed (rpm) signal, and a torque signal. When the pump is at a desired initial speed and an arterial flow line from the pump is unclamped, a decrease in torque requirements indicates a reverse flow condition, and an alarm is initiated. Reverse flow conditions are also indicated by an increase in rpm followed by a decrease in flow magnitude, and by a decrease in rpm coupled with an increase in flow magnitude. In addition, when the pump is running at a constant rpm, an increase in flow magnitude followed by a decrease in torque indicates a reverse flow condition, and an alarm is sounded.

    摘要翻译： 具有由电动机驱动的离心血液泵的心/肺旁路系统检测血液从负载流向泵出口的逆流状态。 报警控制根据流量幅度信号，泵速（rpm）信号和转矩信号提供报警信号。 当泵处于期望的初始速度并且来自泵的动脉流线松开时，扭矩要求的降低表示反向流动状态，并且起动报警。 反向流动条件还通过转速的增加表示，随后流量幅度的减小，以及随着流量幅度的增加而减小的转速。 另外，当泵以恒定的转速运转时，流量大幅度的增加，随之而来的是扭矩的下降，表示反向流动状态，并发出警报。

    Centrifugal blood pump with tapered shaft seal
    10.
    发明授权
    Centrifugal blood pump with tapered shaft seal 失效
    离心式血泵带锥形轴封

    公开(公告)号：US4606698A

    公开(公告)日：1986-08-19

    申请号：US628727

    申请日：1984-07-09

    申请人： Earl W. Clausen ,  Lloyd C. Hubbard

    发明人： Earl W. Clausen ,  Lloyd C. Hubbard

    IPC分类号： A61M1/10 ,  F04D13/02 ,  F04D29/12 ,  F04D29/22 ,  F16J15/38

    CPC分类号： A61M1/101 ,  A61M1/1025 ,  A61M1/1036 ,  F04D13/027 ,  F04D29/126 ,  F04D29/2205 ,  Y10S415/90

    摘要： A centrifugal blood pump has a tapered seal between a pump housing wall and a hub of an impeller which provides a fluid tight seal interface surrounding a drive shaft which is connected to the impeller and which extends through the pump housing wall. The tapered seal has a maximum radial dimension adjacent to the wall and a minimum radial dimension adjacent the hub so that air bubbles (which seek the smallest shaft diameter) will not insulate the seal interface edges from fluid flow. The seal interface, which is perpendicular to the drive shaft axis, is located in a high flow area between the wall and the hub to increase cooling effects.

    摘要翻译： 离心式血泵在泵外壳壁和叶轮的轮毂之间具有锥形密封，其提供围绕连接到叶轮并且延伸穿过泵壳体壁的驱动轴的流体密封密封接口。 锥形密封件具有邻近壁的最大径向尺寸和邻近轮毂的最小径向尺寸，使得气泡（其寻求最小轴直径）将不使密封界面边缘与流体流动绝缘。 垂直于驱动轴轴线的密封接口位于壁和轮毂之间的高流动区域，以增加冷却效果。