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    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：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。

    VARIABLE INDICATION ESTIMATOR
    3.
    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。

    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：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。

    Variable mode averager
    6.
    发明授权
    Variable mode averager 有权
    可变模式平均器

    公开(公告)号：US06430525B1

    公开(公告)日：2002-08-06

    申请号：US09586845

    申请日：2000-06-05

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

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

    IPC分类号： H03H1700

    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 signal processor generates an estimate of a block of weighted input values. An adjustable mode parameter determines a time point relative to the input values at which the estimate is computed. By varying the mode parameter, the output characteristics of the processor are variable between that of a smoother, a filter and a forward predictor of the input values. When input signal confidence is low, the mode parameter is adjusted so that the processor smoothes the input signal. When input signal confidence is high, the mode parameter is adjusted so that the processor output has a faster and more accurate response to the input signal. The variable mode averager is particular applicable to the monitoring of critical physiological parameters in patient-care settings. When applied to pulse oximeter oxygen saturation measurements, the mode parameter can be varied in real-time to achieve a tradeoff between the suppression of false alarms and signal artifacts and the immediate detection of life threatening oxygen desaturation events.

    摘要翻译： 信号处理器产生加权输入值块的估计。 可调模式参数确定相对于计算估计的输入值的时间点。 通过改变模式参数，处理器的输出特性可以在平滑器，滤波器和输入值的前向预测器之间变化。 当输入信号置信度低时，调整模式参数，使处理器平滑输入信号。 当输入信号置信度高时，调整模式参数，使得处理器输出对输入信号的响应更快更准确。 可变模式平均器特别适用于在患者护理环境中监测关键生理参数。 当应用于脉搏血氧饱和度氧饱和度测量时，可以实时地改变模式参数，以实现抑制假警报和信号伪影之间的折衷，并立即检测危及生命的氧饱和度事件。

    Multi-wavelength physiological monitor
    9.
    发明授权
    Multi-wavelength physiological monitor 有权
    多波长生理监护仪

    公开(公告)号：US08423106B2

    公开(公告)日：2013-04-16

    申请号：US12045309

    申请日：2008-03-10

    申请人： Marcelo M. Lamego ,  Mohamed Diab ,  Walter M. Weber ,  Ammar Al-Ali ,  Joe Kiani

    发明人： Marcelo M. Lamego ,  Mohamed Diab ,  Walter M. Weber ,  Ammar Al-Ali ,  Joe Kiani

    IPC分类号： A61B5/1455

    CPC分类号： A61B5/14552 ,  A61B5/0205 ,  A61B5/02416 ,  A61B5/14551 ,  A61B5/1495 ,  A61B5/6826 ,  A61B5/6838 ,  A61B5/72 ,  G01N21/314 ,  G01N21/35 ,  G01N21/359 ,  G01N2201/0627 ,  G01N2201/129

    摘要： A physiological monitor for determining blood oxygen saturation of a medical patient includes a sensor, a signal processor and a display. The sensor includes at least three light emitting diodes. Each light emitting diode is adapted to emit light of a different wavelength. The sensor also includes a detector, where the detector is adapted to receive light from the three light emitting diodes after being attenuated by tissue. The detector generates an output signal based at least in part upon the received light. The signal processor determines blood oxygen saturation based at least upon the output signal, and the display provides an indication of the blood oxygen saturation.

    摘要翻译： 用于确定医疗患者的血氧饱和度的生理监测器包括传感器，信号处理器和显示器。 传感器包括至少三个发光二极管。 每个发光二极管适于发射不同波长的光。 传感器还包括检测器，其中检测器适于在被组织衰减之后接收来自三个发光二极管的光。 检测器至少部分地基于所接收的光产生输出信号。 信号处理器至少基于输出信号确定血氧饱和度，并且显示器提供血氧饱和度的指示。

    Patient monitor having context-based sensitivity adjustments
    10.
    发明授权
    Patient monitor having context-based sensitivity adjustments 有权
    患者监护仪具有基于上下文的灵敏度调整

    公开(公告)号：US08337403B2

    公开(公告)日：2012-12-25

    申请号：US12254748

    申请日：2008-10-20

    申请人： Ammar Al-Ali ,  Massi E. Kiani ,  Walter M. Weber

    发明人： Ammar Al-Ali ,  Massi E. Kiani ,  Walter M. Weber

    IPC分类号： A61B5/00

    CPC分类号： A61B5/14551 ,  A61B2505/01 ,  A61B2560/02 ,  A61B2560/0487 ,  A61B2562/08 ,  G06F3/002 ,  G16H40/40 ,  G16H40/63

    摘要： An application identification sensor comprises a plurality of emitters configured to transmit light into a tissue site and a detector configured to receive the light after tissue absorption. The detector generates a signal responsive to the intensity of the light and communicates the signal to a monitor. An information element is readable by the monitor so as to identify a sensor application. The monitor presets at least one user-selectable operational parameter in response to the information element.

    摘要翻译： 应用识别传感器包括被配置为将光透射到组织部位中的多个发射器和构造成在组织吸收之后接收光的检测器。 检测器产生响应于光的强度的信号并将信号传送到监视器。 信息元素可由监视器读取，以识别传感器应用。 监视器响应于信息元素预设至少一个用户可选择的操作参数。