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    • 1. 发明授权
    • Apparatus and method for assessing vascular health
    • 用于评估血管健康的装置和方法
    • US08452388B2
    • 2013-05-28
    • US12464640
    • 2009-05-12
    • Joseph R. FeldkampJeffrey Robert Heller
    • Joseph R. FeldkampJeffrey Robert Heller
    • A61M25/00
    • A61B5/053A61B5/0522A61B5/6824A61B2560/0431A61B2560/0462
    • Apparatus and methods for utilizing conductivity measurements to assess vascular health or to diagnose vascular conditions are disclosed. An exemplary method includes performing a first conductivity measurement of an extremity at a first elevation; elevating the extremity to a second elevation; performing a second conductivity measurement at the second elevation; and comparing the first conductivity measurement and the second conductivity measurement to determine a conductivity displacement Δσ. Another exemplary method includes maintaining a conductivity sensor adjacent to an individual for a period of time; performing a series of conductivity measurements; using the series of conductivity measurements to determine the transient behavior of the conductivity over the period of time; and using the transient behavior of the conductivity to assess the vascular health of the individual. A conductivity sensor and platform unit for performing conductivity measurements are also disclosed.
    • 公开了用于利用电导率测量来评估血管健康或诊断血管病症的装置和方法。 示例性方法包括在第一高度处执行末端的第一电导率测量; 将肢体升高到第二高度; 在第二高度处执行第二电导率测量; 并且比较第一电导率测量和第二电导率测量以确定电导率位移Deltasigma。 另一示例性方法包括在一段时间内保持与个体相邻的电导率传感器; 进行一系列电导率测量; 使用一系列电导率测量来确定电导率在一段时间内的瞬态行为; 并使用电导率的瞬态行为来评估个体的血管健康。 还公开了用于执行电导率测量的电导率传感器和平台单元。
    • 4. 发明申请
    • Resonant coil for measuring specimen condition
    • 用于测量样品状态的谐振线圈
    • US20080048786A1
    • 2008-02-28
    • US11464284
    • 2006-08-14
    • Joseph R. FeldkampJeffrey R. HellerShawn J. Sullivan
    • Joseph R. FeldkampJeffrey R. HellerShawn J. Sullivan
    • H03L7/00
    • G01H13/00A61B5/053A61B5/0537A61B5/4872
    • An oscillator provides a reference signal having a phase. A tunable reactive circuit, including an induction coil, is driven by the fixed frequency reference signal of the oscillator with coil adapted to be positioned adjacent the specimen to generate an oscillating signal corresponding to the condition of the specimen. The tunable reactive circuit provides an output signal having a parameter indicative of the condition of the specimen. A resonant control circuit compares the reference signal to the oscillating signal and provides to the tunable reactive circuit a resonance control signal representative of the comparison. The resonance control signal tunes the tunable reactive circuit, which may be a series RLC circuit, so that the frequency of the oscillating signal is substantially constant.
    • 振荡器提供具有相位的参考信号。 包括感应线圈的可调谐无功电路由具有线圈的振荡器的固定频率参考信号驱动,其适于与样本相邻定位,以产生对应于样本条件的振荡信号。 可调谐无功电路提供具有指示样本条件的参数的输出信号。 谐振控制电路将参考信号与振荡信号进行比较,并向可调谐无功电路提供表示比较的谐振控制信号。 谐振控制信号调谐可调谐无功电路,其可以是串联RLC电路,使得振荡信号的频率基本上是恒定的。
    • 5. 发明授权
    • Resonant coil for measuring specimen condition
    • 用于测量样品状态的谐振线圈
    • US08725245B2
    • 2014-05-13
    • US11464284
    • 2006-08-14
    • Joseph R. FeldkampJeffrey R. HellerShawn J. Sullivan
    • Joseph R. FeldkampJeffrey R. HellerShawn J. Sullivan
    • A61B5/05G01R27/08
    • G01H13/00A61B5/053A61B5/0537A61B5/4872
    • An oscillator provides a reference signal having a phase. A tunable reactive circuit, including an induction coil, is driven by the fixed frequency reference signal of the oscillator with coil adapted to be positioned adjacent the specimen to generate an oscillating signal corresponding to the condition of the specimen. The tunable reactive circuit provides an output signal having a parameter indicative of the condition of the specimen. A resonant control circuit compares the reference signal to the oscillating signal and provides to the tunable reactive circuit a resonance control signal representative of the comparison. The resonance control signal tunes the tunable reactive circuit, which may be a series RLC circuit, so that the frequency of the oscillating signal is substantially constant.
    • 振荡器提供具有相位的参考信号。 包括感应线圈的可调谐无功电路由具有线圈的振荡器的固定频率参考信号驱动,其适于与样本相邻定位,以产生对应于样本条件的振荡信号。 可调谐无功电路提供具有指示样本条件的参数的输出信号。 谐振控制电路将参考信号与振荡信号进行比较,并向可调谐无功电路提供表示比较的谐振控制信号。 谐振控制信号调谐可调谐无功电路,其可以是串联RLC电路,使得振荡信号的频率基本上是恒定的。
    • 6. 发明授权
    • Conductivity sensor
    • 电导率传感器
    • US08384378B2
    • 2013-02-26
    • US12464431
    • 2009-05-12
    • Joseph R. FeldkampJeffrey Robert HellerDouglas Glenn Laudenslager
    • Joseph R. FeldkampJeffrey Robert HellerDouglas Glenn Laudenslager
    • G01N27/72
    • G01R27/2611A61B5/053A61B5/0537A61B5/681A61B5/6824A61B5/6887A61B5/7282A61B2560/0431A61B2560/0462A61B2562/0223H01F5/003
    • A conductivity sensor is disclosed. The conductivity sensor includes an oscillator for providing an input signal and a reactive circuit having an induction coil, a capacitive element, and a resistive element connected in parallel. The induction coil is adapted to be placed adjacent to a specimen. The conductivity sensor further includes a control circuit for driving the reactive circuit to resonance when the induction coil is placed adjacent to the specimen. The reactive coil is configured to provide an output signal having a parameter representative of the conductivity of the specimen when the reactive circuit is at resonance. The induction coil may include a first conductive element that spirals outward to an external perimeter and a second conductive element operably connected to the first conductive element. The second conductive element spirals inward from the external perimeter staggered relative to the first conductive element.
    • 公开了电导率传感器。 电导率传感器包括用于提供输入信号的振荡器和具有并联连接的感应线圈,电容元件和电阻元件的无功电路。 感应线圈适于放置在与样本相邻的位置。 电导率传感器还包括控制电路,用于当感应线圈与样本相邻放置时,驱动无功电路进行谐振。 反应线圈被配置为当无功电路处于共振时提供具有表示样品的导电性的参数的输出信号。 感应线圈可以包括向外螺旋到外部周边的第一导电元件和可操作地连接到第一导电元件的第二导电元件。 第二导电元件相对于第一导电元件从外部周边向内螺旋地交错设置。
    • 7. 发明申请
    • Apparatus and Method For Assessing Vascular Health
    • 用于评估血管健康的装置和方法
    • US20100222696A1
    • 2010-09-02
    • US12464640
    • 2009-05-12
    • Joseph R. FeldkampJeffrey Robert Heller
    • Joseph R. FeldkampJeffrey Robert Heller
    • A61B5/053
    • A61B5/053A61B5/0522A61B5/6824A61B2560/0431A61B2560/0462
    • Apparatus and methods for utilizing conductivity measurements to assess vascular health or to diagnose vascular conditions are disclosed. An exemplary method includes performing a first conductivity measurement of an extremity at a first elevation; elevating the extremity to a second elevation; performing a second conductivity measurement at the second elevation; and comparing the first conductivity measurement and the second conductivity measurement to determine a conductivity displacement Δσ. Another exemplary method includes maintaining a conductivity sensor adjacent to an individual for a period of time; performing a series of conductivity measurements; using the series of conductivity measurements to determine the transient behavior of the conductivity over the period of time; and using the transient behavior of the conductivity to assess the vascular health of the individual. A conductivity sensor and platform unit for performing conductivity measurements are also disclosed.
    • 公开了用于利用电导率测量来评估血管健康或诊断血管病症的装置和方法。 示例性方法包括在第一高度处执行末端的第一电导率测量; 将肢体升高到第二高度; 在第二高度处执行第二电导率测量; 并且比较第一电导率测量和第二电导率测量以确定电导率位移&Dgr。 另一示例性方法包括在一段时间内保持与个体相邻的电导率传感器; 进行一系列电导率测量; 使用一系列电导率测量来确定电导率在一段时间内的瞬态行为; 并使用电导率的瞬态行为来评估个体的血管健康。 还公开了用于执行电导率测量的电导率传感器和平台单元。