利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

29 条记录 (耗时 0.037 秒)

    Multi-purpose multi-parameter cardiac catheter
    1.
    发明授权
    Multi-purpose multi-parameter cardiac catheter 失效
    多功能多参数心脏导管

    公开(公告)号：US5611338A

    公开(公告)日：1997-03-18

    申请号：US315033

    申请日：1994-09-29

    申请人： David A. Gallup ,  John M. Sperinde ,  William A. Ambrisco ,  Timothy J. Hughes ,  Anthony J. Pantages ,  Jeffrey A. Sarge ,  Scott T. Tsuchitani

    发明人： David A. Gallup ,  John M. Sperinde ,  William A. Ambrisco ,  Timothy J. Hughes ,  Anthony J. Pantages ,  Jeffrey A. Sarge ,  Scott T. Tsuchitani

    IPC分类号： A61B5/00 ,  A61B5/028 ,  A61B5/145 ,  A61B5/1459

    CPC分类号： A61B5/028 ,  A61B5/1459

    摘要： A multi-lumen, multi-purpose cardiac catheter which incorporates optical filaments and an optical coupler for use with external apparatus for determining the oxygen concentration in the blood of a patient under critical care conditions, as well as incorporating therein a thermal element useable with a second external apparatus for measurement of continuous cardiac output. The thermal element is disposed at a necked down portion of the catheter at the distal end thereof, with at least one of the lumens of the catheter substantially compressed at the necked down portion thereof. The catheter also includes a thermistor and at least one injectate port for enabling the user to also conduct thermal dilution readings and obtain intermittent measurements of cardiac output. The combination of a thermal dilution catheter with a SVO.sub.2 catheter and a continuous cardiac output catheter gives the multi-purpose catheter above described substantial versatility as well as providing the user with a versatile cardiac catheter device which enables him to conduct multiple evaluations of disparate blood-related parameters which require the use of separate apparatus. Simply by switching from one external apparatus to the other, the user can obtain readings for different blood-related parameters useful in the treatment of the cardiac patient.

    摘要翻译： 一种多腔多用途心脏导管，其包含光纤丝和用于外部设备的光耦合器，用于确定在危重护理条件下患者血液中的氧浓度，以及在其中结合使用的热元件 用于测量连续心输出量的第二外部装置。 热元件设置在导管的远端处的颈缩部分，其中导管的至少一个腔在其颈缩部分基本上被压缩。 导管还包括热敏电阻和至少一个注射口，用于使用户能够进行热稀释读数并获得心输出量的间歇测量。 热稀释导管与SVO2导管和连续心输出导管的组合给出了多用途导管以上描述的实质性多功能性，并为使用者提供了多功能心脏导管装置，使他能够进行不同血液 - 需要使用分离设备的相关参数。 简单地通过从一个外部设备切换到另一个外部设备，用户可以获得用于治疗心脏病人的不同血液相关参数的读数。

    Multi-purpose multi-parameter cardiac catheter
    2.
    发明授权
    Multi-purpose multi-parameter cardiac catheter 失效
    多功能多参数心脏导管

    公开(公告)号：US5435308A

    公开(公告)日：1995-07-25

    申请号：US914279

    申请日：1992-07-16

    申请人： David A. Gallup ,  Timothy J. Hughes ,  John Sperinde

    发明人： David A. Gallup ,  Timothy J. Hughes ,  John Sperinde

    IPC分类号： A61B5/00 ,  A61B5/028 ,  A61B5/145 ,  A61B5/1459

    CPC分类号： A61B5/028 ,  A61B5/1459

    摘要： A multi-lumen, multi-purpose cardiac catheter which incorporates optical filaments and an optical coupler for use with external apparatus for determining the oxygen concentration in the blood of a patient under critical care conditions, as well as incorporating therein a heater coil useable with a second external apparatus for measurement of continuous cardiac output. The catheter also includes a thermistor and at least one injectate port for enabling the user to also conduct thermal dilution readings and obtain intermittent measurements of cardiac output. The combination of a thermal dilution catheter with a SVO.sub.2 catheter and a continuous cardiac output catheter gives the multi-purpose catheter above described substantial versatility as well as providing the user with a versatile cardiac catheter device which enables him to conduct multiple evaluations of disparate blood-related parameters which require the use of separate apparatus. Simply by switching from one external apparatus to the other, the user can obtain readings for different blood-related parameters useful in the treatment of the cardiac patient.

    摘要翻译： 一种多腔多用途心脏导管，其包含光纤丝和用于外部设备的光学耦合器，用于确定在危重护理条件下患者的血液中的氧浓度，以及其中结合有可用于 用于测量连续心输出量的第二外部装置。 导管还包括热敏电阻和至少一个注射口，用于使用户能够进行热稀释读数并获得心输出量的间歇测量。 热稀释导管与SVO2导管和连续心输出导管的组合给出了多用途导管以上描述的实质性多功能性，并为使用者提供了多功能心脏导管装置，使他能够进行不同血液 - 需要使用分离设备的相关参数。 简单地通过从一个外部设备切换到另一个外部设备，用户可以获得用于治疗心脏病人的不同血液相关参数的读数。

    Multi-purpose multi-parameter cardiac catheter
    3.
    发明授权
    Multi-purpose multi-parameter cardiac catheter 失效
    多功能多参数心脏导管

    公开(公告)号：US5634720A

    公开(公告)日：1997-06-03

    申请号：US300272

    申请日：1994-09-02

    申请人： David A. Gallup ,  Timothy J. Hughes

    发明人： David A. Gallup ,  Timothy J. Hughes

    IPC分类号： A61B5/00 ,  A61B5/028 ,  A61B5/145 ,  A61B5/1459 ,  G01K7/16

    CPC分类号： A61B5/028 ,  A61B5/1459

    摘要： A multi-lumen, multi-purpose cardiac catheter which incorporates optical filaments and an optical coupler for use with external apparatus for determining the oxygen concentration in the blood of a patient under critical care conditions, as well as incorporating therein a thermal element useable with a second external apparatus for measurement of continuous cardiac output. A thermal plug provides an interface between a temperature control apparatus and the thermal element to simply and accurately monitor and control the temperature of the thermal element. A temperature monitoring circuit in the thermal plug facilitates temperature measurement at the thermal element. The catheter also includes a thermistor and at least one injectate port for enabling the user to also conduct thermal dilution readings and obtain intermittent measurements of cardiac output. The combination of a thermal dilution catheter with a SV0.sub.2 catheter and a continuous cardiac output catheter gives the multi-purpose catheter above described substantial versatility as well as providing the user with a versatile cardiac catheter device which enables him to conduct multiple evaluations of disparate blood-related parameters which require the use of separate apparatus. Simply by switching from one external apparatus to the other, the user can obtain readings for different blood-related parameters useful in the treatment of the cardiac patient.

    摘要翻译： 一种多腔多用途心脏导管，其包括光纤丝和用于外部设备的光耦合器，用于确定在危重护理条件下患者血液中的氧浓度，以及在其中结合使用的热元件 用于测量连续心输出量的第二外部装置。 热插头提供温度控制装置和热元件之间的界面，以简单且精确地监测和控制热元件的温度。 热插头中的温度监控电路有利于温度测量。 导管还包括热敏电阻和至少一个注射口，用于使用户能够进行热稀释读数并获得心输出量的间歇测量。 热稀释导管与SV02导管和连续心输出导管的组合给出了上述多功能导管的多用途导管，并为使用者提供了多功能的心脏导管装置，使他能够进行不同血液 - 需要使用分离设备的相关参数。 简单地通过从一个外部设备切换到另一个外部设备，用户可以获得用于治疗心脏病人的不同血液相关参数的读数。

    COMMUNICATION SCHEDULING OF NETWORK NODES USING FAIR ACCESS AND WEIGHTING TECHNIQUES
    5.
    发明申请
    COMMUNICATION SCHEDULING OF NETWORK NODES USING FAIR ACCESS AND WEIGHTING TECHNIQUES 有权
    使用公平访问和加权技术的网络节点的通信调度

    公开(公告)号：US20090086752A1

    公开(公告)日：2009-04-02

    申请号：US11947928

    申请日：2007-11-30

    申请人： Arthur E. Anderson ,  Wendell Y. Kishaba ,  Timothy J. Hughes

    发明人： Arthur E. Anderson ,  Wendell Y. Kishaba ,  Timothy J. Hughes

    IPC分类号： H04B7/212

    CPC分类号： H04W72/1257 ,  H04L45/00 ,  H04W72/1278

    摘要： In one aspect, a method to schedule network communications in a network having nodes connected by links includes sending a bandwidth value of a first node for each link connected to the first node to neighbors of the first node, receiving bandwidth values from the neighbors of the first node; and determining node weight values of the first node and the neighbors of the first node based on the bandwidth values received from the neighbors of the first node and the bandwidth value of the first node. The method also includes sending the node weight values of the first node to the neighbors of the first node, receiving the node weight values from the neighbors of the first node, determining access values for each node based on a fair access technique and determining network scheduling based on the access values and the node weight values.

    摘要翻译： 在一个方面，一种在具有由链路连接的节点的网络中调度网络通信的方法包括向连接到第一节点的每个链路向第一节点的邻居发送第一节点的带宽值，从第一节点的邻居接收带宽值 第一节点 以及基于从所述第一节点的邻居接收的带宽值和所述第一节点的带宽值来确定所述第一节点和所述第一节点的邻居的节点权重值。 该方法还包括将第一节点的节点加权值发送到第一节点的邻居，从第一节点的邻居接收节点加权值，基于公平接入技术确定每个节点的接入值，并确定网络调度 基于访问值和节点权重值。

    Heated catheter for monitoring cardiac output
    7.
    发明授权
    Heated catheter for monitoring cardiac output 失效
    加热导管监测心输出量

    公开(公告)号：US5277191A

    公开(公告)日：1994-01-11

    申请号：US717549

    申请日：1991-06-19

    申请人： Timothy J. Hughes

    发明人： Timothy J. Hughes

    IPC分类号： A61B5/028 ,  A61B5/029

    CPC分类号： A61B5/028 ,  A61B5/029

    摘要： A heated catheter for monitoring cardiac output. Displaced from a distal end of a heated catheter (30) is a resistive heater (32) that heats blood flowing within a heart muscle (10). The resistive heater is mounted on the catheter so that when the catheter is inserted into the heart, the resistive heater is disposed in the right ventricle. A temperature sensor (34) is disposed downstream of the resistive heater, in or proximate the pulmonary artery during use. A differential amplifier (40, 70) provides an electrical current to the resistive heater that varies as a function of the difference between the temperature of the resistive heater, measured by a temperature sensor (35), and a predetermined temperature. In another embodiment of the invention, a resistive heater (90) has a resistance that varies with temperature. The resistive heater comprises one arm of a bridge circuit (85). A differential amplifier (110) provides an electrical current to the bridge circuit in response to the voltage developed across the bridge circuit. In yet another embodiment, a constant power dissipation is maintained in a resistive heater (60 ), so long as its temperature does not exceed a predetermined maximum. Should that occur, a power control block (80) incrementally reduces the power dissipated in the resistive heater, thereby insuring that the temperature of the resistive heater does not damage blood cells, yet is sufficient to provide a good signal-to-noise ratio in respect to a signal indicative of the temperature rise in blood flowing from the heart.

    摘要翻译： 用于监测心输出量的加热导管。 从加热的导管（30）的远端排出的是加热在心脏肌肉（10）内流动的血液的电阻加热器（32）。 电阻加热器安装在导管上，使得当导管插入心脏时，电阻加热器设置在右心室中。 在使用期间，温度传感器（34）设置在电阻加热器的下游，在肺动脉中或其附近。 差分放大器（40,70）向电阻加热器提供电流，其根据由温度传感器（35）测量的电阻加热器的温度与预定温度之间的差异而变化。 在本发明的另一个实施例中，电阻加热器（90）具有随温度变化的电阻。 电阻加热器包括桥接电路（85）的一个臂。 差分放大器（110）响应于桥式电路上产生的电压而向桥式电路提供电流。 在另一个实施例中，只要其温度不超过预定的最大值，则在电阻加热器（60）中保持恒定的功率消耗。 如果发生这种情况，功率控制块（80）逐渐减小电阻加热器中消耗的功率，从而确保电阻加热器的温度不会损伤血细胞，但足以提供良好的信噪比 相对于指示从心脏流出的血液的温度升高的信号。

    Method for continuously monitoring cardiac output
    9.
    发明授权
    Method for continuously monitoring cardiac output 失效
    连续监测心输出量的方法

    公开(公告)号：US5285796A

    公开(公告)日：1994-02-15

    申请号：US28992

    申请日：1993-03-10

    申请人： Timothy J. Hughes

    发明人： Timothy J. Hughes

    IPC分类号： A61B5/028 ,  A61B5/02 ,  A61B5/00 ,  A61B19/00

    CPC分类号： A61B5/028

    摘要： A method and apparatus for continuously monitoring cardiac output based upon the phase shift between an input signal and a temperature signal indicative of the change in temperature of blood leaving the heart. In a first preferred embodiment of a cardiac output monitoring system (10), a catheter (14) is provided with an electrical resistance heater (22). An electrical current having a sinusoidal wave form with a period of from 30 to 60 seconds is applied to the heater, causing power to be dissipated into the blood within a patient's heart (12). A temperature sensor (24) disposed near a distal end of the catheter produces a signal indicative of the temperature of blood leaving the heart. The temperature signal and the signal corresponding to the electrical power dissipated in the heater (an input signal) are filtered at a frequency .omega. corresponding to the frequency of the applied electrical current, i.e., the frequency of the input signal. The amplitude of the input power, the amplitude of the temperature signal, and their phase difference are used in calculating cardiac output. In another embodiment, a temperature conditioned saline solution (84 ) is circulated through a catheter (14') in a closed loop, so that it flows through a heat exchanger (60) disposed within the heart. The fluid is circulated through the catheter on a periodic basis, providing a periodic input signal. The temperature signal produced by the temperature sensor on the catheter distal end and power dissipated to or absorbed from the blood by the heat exchanger comprise the two signals from which the cardiac output is determined as described above. The determination of cardiac output is also corrected for the time constant of the catheter/heater (or heat exchanger) and of the temperature sensor.

    摘要翻译： 一种用于基于输入信号和指示离开心脏的血液温度变化的温度信号之间的相移来连续监测心输出量的方法和装置。 在心输出量监测系统（10）的第一优选实施例中，导管（14）设置有电阻加热器（22）。 将具有30至60秒周期的正弦波形的电流施加到加热器，使得电力消散到患者心脏（12）内的血液中。 设置在导管的远端附近的温度传感器（24）产生指示离开心脏的血液的温度的信号。 对应于在加热器（输入信号）中消耗的电功率的温度信号和信号以与所施加的电流的频率即输入信号的频率相对应的频率（ω）进行滤波。 输入功率的幅度，温度信号的幅度及其相位差用于计算心输出量。 在另一个实施例中，温度调节的盐水溶液（84）在闭合回路中循环通过导管（14'），使得其流过设置在心脏内的热交换器（60）。 流体周期性地循环通过导管，提供周期性的输入信号。 由温度传感器在导管远端产生的温度信号和由热交换器消耗或从血液吸收的功率包括如上所述确定心输出量的两个信号。 导管/加热器（或热交换器）和温度传感器的时间常数也校正心输出量的确定。

    Apparatus and method for continuously monitoring cardiac output
    10.
    发明授权
    Apparatus and method for continuously monitoring cardiac output 失效
    用于连续监测心输出量的装置和方法

    公开(公告)号：US5217019A

    公开(公告)日：1993-06-08

    申请号：US815068

    申请日：1991-12-27

    申请人： Timothy J. Hughes

    发明人： Timothy J. Hughes

    IPC分类号： A61B5/028

    CPC分类号： A61B5/028

    摘要： A method and apparatus for continuously monitoring cardiac output based upon the phase shift between an in put signal and a temperature signal indicative of the change in temperature of blood leaving the heart. In a first preferred embodiment of a cardiac output monitoring system (10), a catheter (14) is provided with an electrical resistance heater (22). An electrical current having a sinusoidal wave form with a period of from 30 to 60 seconds is applied to the heater, causing power to be dissipated into the blood within a patient's heart (12). A temperature sensor (24) disposed near a distal end of the catheter produces a signal indicative of the temperature of blood leaving the heart. The temperature signal and the signal corresponding to the electrical power dissipated in the heater (an input signal) are filtered at a frequency .omega. corresponding to the frequency of the applied electrical current, i.e., the frequency of the input signal. The amplitude of the input power, the amplitude of the temperature signal, and their phase difference are used in calculating cardiac output. In another embodiment, a temperature conditioned saline solution ( 84) is circulated through catheter (14') in a closed loop, so that it flows through a heat exchanger (60) disposed within the heart. The fluid is circulated through the catheter on a periodic basis, providing a periodic input signal. The temperature signal produced by the temperature sensor on the catheter distal end and power dissipated to or absorbed from the blood by the heat exchanger comprise the two signals from which the cardiac output is determined as described above. The determination of cardiac output is also corrected for the time constant of the catheter/heater (or heat exchanger) and of the temperature sensor.

    摘要翻译： 一种用于基于输入信号和指示离开心脏的血液温度变化的温度信号之间的相移来连续监测心输出量的方法和装置。 在心输出量监测系统（10）的第一优选实施例中，导管（14）设置有电阻加热器（22）。 将具有30至60秒周期的正弦波形的电流施加到加热器，使得电力消散到患者心脏（12）内的血液中。 设置在导管的远端附近的温度传感器（24）产生指示离开心脏的血液的温度的信号。 温度信号和对应于在加热器（输入信号）中消耗的电功率的信号以与所施加的电流的频率即输入信号的频率相对应的频率ω1被滤波。 输入功率的幅度，温度信号的幅度及其相位差用于计算心输出量。 在另一个实施例中，温度调节的盐水溶液（84）在闭合回路中循环通过导管（14'），使得其流过设置在心脏内的热交换器（60）。 流体周期性地循环通过导管，提供周期性的输入信号。 由温度传感器在导管远端产生的温度信号和由热交换器消耗或从血液吸收的功率包括如上所述确定心输出量的两个信号。 导管/加热器（或热交换器）和温度传感器的时间常数也校正心输出量的确定。