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    Method and apparatus for demodulating signals in a pulse oximetry system
    1.
    发明授权
    Method and apparatus for demodulating signals in a pulse oximetry system 有权
    用于在脉搏血氧测定系统中解调信号的方法和装置

    公开(公告)号：US08185180B2

    公开(公告)日：2012-05-22

    申请号：US11842106

    申请日：2007-08-20

    申请人： Mohamed K. Diab ,  Walter M. Weber ,  Ammar Al-Ali

    发明人： Mohamed K. Diab ,  Walter M. Weber ,  Ammar Al-Ali

    IPC分类号： A61B5/1455

    CPC分类号： A61B5/7228 ,  A61B5/14551 ,  A61B5/14552 ,  A61B5/1495 ,  A61B5/7203 ,  A61B5/7217 ,  A61B5/7232 ,  A61B2560/0242 ,  A61B2562/0238 ,  H04J3/10 ,  H04J14/08

    摘要： A method and an apparatus measure blood oxygenation in a subject. A light source is activated to cause a first emission at a first wavelength and a second emission at a second wavelength. A detector detects a composite signal indicative of an attenuation of the first and second wavelengths by tissue of a patient. The composite signal is demodulated into a first intensity signal and a second intensity signal. Blood oxygenation in the subject is determined from the first and second intensity signals. In one embodiment, demodulation is based at least in part on a period when at least one of the wavelengths is not activated. In one embodiment, a modulation of the first and second wavelengths is determined in order to avoid frequencies of ambient noise. In one embodiment, the composite signal's sampling rate is reduced before and/or after demodulation.

    摘要翻译： 一种测量受试者血液氧合的方法和装置。 光源被激活以引起第一波长的第一发射和第二波长的第二发射。 检测器通过患者的组织检测指示第一和第二波长的衰减的复合信号。 复合信号被解调为第一强度信号和第二强度信号。 从第一和第二强度信号确定受试者的血氧。 在一个实施例中，解调至少部分地基于至少一个波长未被激活的周期。 在一个实施例中，确定第一和第二波长的调制以避免环境噪声的频率。 在一个实施例中，复合信号的采样率在解调之前和/或之后被减小。

    Method and apparatus for demodulating signals in a pulse oximetry system
    2.
    发明授权
    Method and apparatus for demodulating signals in a pulse oximetry system 有权
    用于在脉搏血氧测定系统中解调信号的方法和装置

    公开(公告)号：US06643530B2

    公开(公告)日：2003-11-04

    申请号：US09735960

    申请日：2000-12-13

    申请人： Mohamed K. Diab ,  Walter M. Weber ,  Ammar Al-Ali

    发明人： Mohamed K. Diab ,  Walter M. Weber ,  Ammar Al-Ali

    IPC分类号： A61B500

    CPC分类号： A61B5/7228 ,  A61B5/14551 ,  A61B5/14552 ,  A61B5/1495 ,  A61B5/7203 ,  A61B5/7217 ,  A61B5/7232 ,  A61B2560/0242 ,  A61B2562/0238 ,  H04J3/10 ,  H04J14/08

    摘要： A method and an apparatus measure blood oxygenation in a subject. A first signal source applies a first input signal during a first time interval. A second signal source applies a second input signal during a second time interval. A detector detects a first parametric signal responsive to the first input signal passing through a portion of the subject having blood therein. The detector also detects a second parametric signal responsive to the second input signal passing through the portion of the subject. The detector generates a detector output signal responsive to the first and second parametric signals. A signal processor receives the detector output signal and demodulates the detector output signal by applying a first demodulation signal to a signal responsive to the detector output signal to generate a first output signal responsive to the first parametric signal. The signal processor applies a second demodulation signal to the signal responsive to the detector output signal to generate a second output signal responsive to the second parametric signal. The first demodulation signal and the second demodulation signal both include at least a first component having a first frequency and a first amplitude and a second component having a second frequency and a second amplitude. The second frequency is a harmonic of the first frequency. The second amplitude is related to the first amplitude to minimize crosstalk from the first parametric signal to the second output signal and to minimize crosstalk from the second parametric signal to the first output signal.

    摘要翻译： 一种测量受试者血液氧合的方法和装置。 第一信号源在第一时间间隔期间施加第一输入信号。 第二信号源在第二时间间隔期间施加第二输入信号。 检测器检测第一参数信号，其响应于第一输入信号通过其中具有血液的被摄体的一部分。 检测器还检测响应于穿过被摄体的该部分的第二输入信号的第二参数信号。 检测器响应于第一和第二参数信号产生检测器输出信号。 信号处理器接收检测器输出信号并通过将响应于检测器输出信号的第一解调信号施加到信号来解调检测器输出信号，以响应于第一参数信号产生第一输出信号。 信号处理器响应于检测器输出信号向该信号施加第二解调信号，以响应于第二参数信号产生第二输出信号。 第一解调信号和第二解调信号都至少包括具有第一频率和第一振幅的第一分量和具有第二频率和第二振幅的第二分量。 第二频率是第一频率的谐波。 第二幅度与第一幅度相关，以使从第一参数信号到第二输出信号的串扰最小化，并使从第二参数信号到第一输出信号的串扰最小化。

    Method and apparatus for demodulating signals in a pulse oximetry system
    5.
    发明授权
    Method and apparatus for demodulating signals in a pulse oximetry system 有权
    用于在脉搏血氧测定系统中解调信号的方法和装置

    公开(公告)号：US07221971B2

    公开(公告)日：2007-05-22

    申请号：US11311213

    申请日：2005-12-19

    申请人： Mohamed K. Diab ,  Walter M. Weber ,  Ammar Al-Ali

    发明人： Mohamed K. Diab ,  Walter M. Weber ,  Ammar Al-Ali

    IPC分类号： A61B5/00

    CPC分类号： A61B5/7228 ,  A61B5/14551 ,  A61B5/14552 ,  A61B5/1495 ,  A61B5/7203 ,  A61B5/7217 ,  A61B5/7232 ,  A61B2560/0242 ,  A61B2562/0238 ,  H04J3/10 ,  H04J14/08

    摘要： A method and an apparatus measure blood oxygenation in a subject. A first signal source applies a first input signal during a first time interval. A second signal source applies a second input signal during a second time interval. A detector detects a first parametric signal responsive to the first input signal passing through a portion of the subject having blood therein. The detector also detects a second parametric signal responsive to the second input signal passing through the portion of the subject. The detector generates a detector output signal responsive to the first and second parametric signals. A signal processor receives the detector output signal and demodulates the detector output signal by applying a first demodulation signal to a signal responsive to the detector output signal to generate a first output signal responsive to the first parametric signal. The signal processor applies a second demodulation signal to the signal responsive to the detector output signal to generate a second output signal responsive to the second parametric signal. The first demodulation signal and the second demodulation signal both include at least a first component having a first frequency and a first amplitude and a second component having a second frequency and a second amplitude. The second frequency is a harmonic of the first frequency. The second amplitude is related to the first amplitude to minimize crosstalk from the first parametric signal to the second output signal and to minimize crosstalk from the second parametric signal to the first output signal.

    摘要翻译： 一种测量受试者血液氧合的方法和装置。 第一信号源在第一时间间隔期间施加第一输入信号。 第二信号源在第二时间间隔期间施加第二输入信号。 检测器检测第一参数信号，其响应于第一输入信号通过其中具有血液的被摄体的一部分。 检测器还检测响应于穿过被摄体的该部分的第二输入信号的第二参数信号。 检测器响应于第一和第二参数信号产生检测器输出信号。 信号处理器接收检测器输出信号并通过将响应于检测器输出信号的第一解调信号施加到信号来解调检测器输出信号，以响应于第一参数信号产生第一输出信号。 信号处理器响应于检测器输出信号向该信号施加第二解调信号，以响应于第二参数信号产生第二输出信号。 第一解调信号和第二解调信号都至少包括具有第一频率和第一振幅的第一分量和具有第二频率和第二振幅的第二分量。 第二频率是第一频率的谐波。 第二幅度与第一幅度相关，以使从第一参数信号到第二输出信号的串扰最小化，并使从第二参数信号到第一输出信号的串扰最小化。

    Method and apparatus for demodulating signals in a pulse oximetry system
    6.
    发明授权
    Method and apparatus for demodulating signals in a pulse oximetry system 失效

    公开(公告)号：US06229856B1

    公开(公告)日：2001-05-08

    申请号：US09058799

    申请日：1998-04-10

    申请人： Mohamed K. Diab ,  Walter M. Weber ,  Ammar Al-Ali

    发明人： Mohamed K. Diab ,  Walter M. Weber ,  Ammar Al-Ali

    IPC分类号： H03K900

    CPC分类号： A61B5/7228 ,  A61B5/14551 ,  A61B5/14552 ,  A61B5/1495 ,  A61B5/7203 ,  A61B5/7217 ,  A61B5/7232 ,  A61B2560/0242 ,  A61B2562/0238 ,  H04J3/10 ,  H04J14/08

    摘要： A method and an apparatus measure blood oxygenation in a subject. A first signal source applies a first input signal during a first time interval. A second signal source applies a second input signal during a second time interval. A detector detects a first parametric signal responsive to the first input signal passing through a portion of the subject having blood therein. The detector also detects a second parametric signal responsive to the second input signal passing through the portion of the subject. The detector generates a detector output signal responsive to the first and second parametric signals. A signal processor receives the detector output signal and demodulates the detector output signal by applying a first demodulation signal to a signal responsive to the detector output signal to generate a first output signal responsive to the first parametric signal. The signal processor applies a second demodulation signal to the signal responsive to the detector output signal to generate a second output signal responsive to the second parametric signal. The first demodulation signal and the second demodulation signal both include at least a first component having a first frequency and a first amplitude and a second component having a second frequency and a second amplitude. The second frequency is a harmonic of the first frequency. The second amplitude is related to the first amplitude to minimize crosstalk from the first parametric signal to the second output signal and to minimize crosstalk from the second parametric signal to the first output signal.

    Method and apparatus for demodulating signals in a pulse oximetry system
    8.
    发明授权
    Method and apparatus for demodulating signals in a pulse oximetry system 有权

    公开(公告)号：US07003339B2

    公开(公告)日：2006-02-21

    申请号：US10700324

    申请日：2003-11-03

    申请人： Mohamed K. Diab ,  Walter M. Weber ,  Ammar Al-Ali

    发明人： Mohamed K. Diab ,  Walter M. Weber ,  Ammar Al-Ali

    IPC分类号： A61B5/00

    CPC分类号： A61B5/7228 ,  A61B5/14551 ,  A61B5/14552 ,  A61B5/1495 ,  A61B5/7203 ,  A61B5/7217 ,  A61B5/7232 ,  A61B2560/0242 ,  A61B2562/0238 ,  H04J3/10 ,  H04J14/08

    摘要： A method and an apparatus measure blood oxygenation in a subject. A first signal source applies a first input signal during a first time interval. A second signal source applies a second input signal during a second time interval. A detector detects a first parametric signal responsive to the first input signal passing through a portion of the subject having blood therein. The detector also detects a second parametric signal responsive to the second input signal passing through the portion of the subject. The detector generates a detector output signal responsive to the first and second parametric signals. A signal processor receives the detector output signal and demodulates the detector output signal by applying a first demodulation signal to a signal responsive to the detector output signal to generate a first output signal responsive to the first parametric signal. The signal processor applies a second demodulation signal to the signal responsive to the detector output signal to generate a second output signal responsive to the second parametric signal. The first demodulation signal and the second demodulation signal both include at least a first component having a first frequency and a first amplitude and a second component having a second frequency and a second amplitude. The second frequency is a harmonic of the first frequency. The second amplitude is related to the first amplitude to minimize crosstalk from the first parametric signal to the second output signal and to minimize crosstalk from the second parametric signal to the first output signal.

    VARIABLE INDICATION ESTIMATOR
    10.
    发明申请
    VARIABLE INDICATION ESTIMATOR 有权
    可变指示估计器

    公开(公告)号：US20110112799A1

    公开(公告)日：2011-05-12

    申请号：US13007109

    申请日：2011-01-14

    申请人： Walter M. Weber ,  Ammar Al-Ali ,  Lorenzo Cazzoli

    发明人： Walter M. Weber ,  Ammar Al-Ali ,  Lorenzo Cazzoli

    IPC分类号： G06F19/00

    CPC分类号： A61B5/7271 ,  A61B5/0002 ,  A61B5/021 ,  A61B5/1455 ,  A61B5/14551 ,  A61B5/6826 ,  A61B5/6829 ,  A61B5/6838 ,  A61B5/72 ,  A61B5/7207 ,  A61B5/7239 ,  G06K9/0051

    摘要： A variable indication estimator which determines an output value representative of a set of input data. For example, the estimator can reduce input data to estimates of a desired signal, select a time, and determine an output value from the estimates and the time. In one embodiment, the time is selected using one or more adjustable signal confidence parameters determine where along the estimates the output value will be computed. By varying the parameters, the characteristics of the output value are variable. For example, when input signal confidence is low, the parameters are adjusted so that the output value is a smoothed representation of the input signal. When input signal confidence is high, the parameters are adjusted so that the output value has a faster and more accurate response to the input signal.

    摘要翻译： 可变指示估计器，其确定代表一组输入数据的输出值。 例如，估计器可以将输入数据减少到期望信号的估计，选择时间，并从估计和时间确定输出值。 在一个实施例中，使用一个或多个可调信号置信参数来选择时间，确定沿着估计将在哪里计算输出值。 通过改变参数，输出值的特性是可变的。 例如，当输入信号置信度低时，调整参数，使得输出值是输入信号的平滑表示。 当输入信号置信度高时，调整参数，使得输出值对输入信号的响应更快更准确。