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公开(公告)号：US5226417A
公开(公告)日：1993-07-13
申请号：US667152
申请日：1991-03-11
申请人： David B. Swedlow , Robert L. Clark , Adnan I. Merchant , Deborah A. Briggs , Jessica A. Warring
发明人： David B. Swedlow , Robert L. Clark , Adnan I. Merchant , Deborah A. Briggs , Jessica A. Warring
CPC分类号： A61B5/14552 , A61B5/721
摘要： An apparatus for detecting movement in patients coupled to pulse oximeters and a method for using the signal generated by the apparatus to filter out the effects of motion from the test results generated by the pulse oximeter are disclosed. In a preferred embodiment, a piezoelectric film located in close proximity to the pulse oximeter's sensor provides a voltage signal whenever movement occurs near the sensor. This voltage signal is processed and the resulting signal is used to correct the oximeter's measurements. In addition to piezoelectric film, accelerometers and strain gauges are also usable to provide a signal indicative of motion.
摘要翻译： 公开了一种用于检测耦合到脉搏血氧仪的患者的运动的装置，以及用于使用由该装置产生的信号从脉搏血氧计产生的测试结果滤除运动的影响的方法。 在优选实施例中，位于紧邻脉搏血氧计传感器的压电薄膜每当在传感器附近发生移动时提供电压信号。 该电压信号被处理，所得信号用于校正血氧计的测量。 除了压电薄膜之外，加速度计和应变计也可用于提供指示运动的信号。
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公开(公告)号：USRE35122E
公开(公告)日：1995-12-19
申请号：US840437
申请日：1992-02-24
IPC分类号： A61B5/00
CPC分类号： A61B5/14551 , A61B5/7203 , A61B5/7207 , A61B5/7257
摘要： A method and apparatus for improving the calculation of oxygen saturation and other blood constituents by non-invasive pulse oximeters. The method and apparatus permit more accurate determination of blood flow by collecting time-measures of the absorption signal at two or more wavelengths and processing the collected time-measure to obtain composite pulsatile flow data from which artifacts have been filtered. The processing may occur in the time domain or in the frequency domain. In the preferred time domain embodiment, successive portions of periodic information are weighted and added together in synchrony to obtain the composite pulse information. In the preferred frequency domain embodiment, the time-measure is Fourier transformed into its spectral components to form the composite information. A new method and apparatus for correlating the heartbeat and optical pulse is provided whereby a product of the ECG R-wave and optical pulse signals corresponding to the same heartbeat is obtained, and one signal is time shifted relative to the other until a maximum waveform product corresponding to the heartbeat is determined.
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公开(公告)号：US4869254A
公开(公告)日：1989-09-26
申请号：US175115
申请日：1988-03-30
申请人： Robert T. Stone , Deborah A. Briggs
发明人： Robert T. Stone , Deborah A. Briggs
IPC分类号： A61B5/145 , A61B5/00 , A61B5/1455 , A61B5/1495
CPC分类号： A61B5/14551 , A61B5/7207
摘要： A method and apparatus for improving the calculation of oxygen saturation by non-invasive pulse oximeters during transient conditions. Transient conditions introduce artifactual errors into the detected optical signal because of changes in transmittance of the light with localized blood volume changes and as the average background oxygen saturation level of the patient's blood changes. The invention relates to correcting the detected optical pulses by linear interpolation and rate of change techniques or by selective frequency filtering and compensating the detected optical signal using the filtered signal to provide accurate estimates of oxygen saturation during transient conditions.
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4.发明授权Method and apparatus for calculating arterial oxygen saturation based plethysmographs including transients 失效用于计算动脉血氧饱和度的体积描记器包括瞬变的方法和装置
公开(公告)号：US5078136A
公开(公告)日：1992-01-07
申请号：US389633
申请日：1989-08-04
申请人： Robert T. Stone , Deborah A. Briggs
发明人： Robert T. Stone , Deborah A. Briggs
IPC分类号： A61B5/00 , A61B5/0295
CPC分类号： A61B5/14551 , A61B5/7207
摘要： A method and apparatus for improving the calculation of oxygen saturation by non-invasive pulse oximeters during transient conditions. Transient conditions introduce artifactual errors into the detected optical signal because of changes in transmittance of the light with localized blood volume changes and as the average background oxygen saturation level of the patient's blood changes. The invention relates to correcting the detected optical pulses by linear interpolation and rate of change techniques or by selective frequency filtering and compensating the detected optical signal using the filtered signal to provide accurate estimates of oxygen saturation during transient conditions.
摘要翻译： 一种用于在瞬态条件下改善非侵入脉搏血氧仪计算氧饱和度的方法和装置。 由于随着局部血容量变化的光的透射率变化以及患者血液的平均背景氧饱和度水平改变，瞬态条件将人为误差引入检测到的光信号。 本发明涉及通过线性内插和变化率技术来校正检测到的光脉冲，或者通过选择性频率滤波来校正检测到的光脉冲，并且使用滤波信号来补偿检测到的光信号，从而在瞬态条件下提供准确的氧饱和度估
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公开(公告)号：US4934372A
公开(公告)日：1990-06-19
申请号：US334694
申请日：1989-04-05
IPC分类号： A61B5/00 , A61B5/024 , A61B5/0245 , A61B5/0428
CPC分类号： A61B5/04282 , A61B5/02416 , A61B5/0245 , A61B5/1455 , A61B5/7207 , A61B5/7225 , A61B5/7257
摘要： A method and apparatus for improving the calculation of oxygen saturation and other blood constituents by non-invasive pulse oximeters. The method and apparatus permit more accurate determination of blood flow by collecting time-measures of the absorption signal at two or more wavelengths and processing the collected time-measure to obtain composite pulsatile flow data from which artifacts have been filtered. The processing may occur in the time domain or in the frequency domain. In the preferred time domain embodiment, successive portions of periodic information are weighted and added together in synchrony to obtain the composite pulse information. In the preferred frequency domain embodiment, the time-measure in Fourier transformed into its spectral components to form the composite information. A new method and apparatus for correlating the heartbeat and optical pulse is provided whereby a product of the ECG R-wave and optical pulse signals corresponding to the same heartbeat is obtained, and one signal is time shifted relative to the other until a maximum waveform product corresponding to the heartbeat is determined.
摘要翻译： 一种用于通过非侵入式脉搏血氧计改善氧饱和度和其他血液成分计算的方法和装置。 所述方法和装置允许通过收集在两个或更多个波长处的吸收信号的时间测量值来对血流进行更准确的确定，并且处理所采集的时间量度以获得从其中过滤伪影的复合脉冲流数据。 该处理可以在时域或频域中发生。 在优选的时域实施例中，周期信息的连续部分被加权并且被同时加在一起以获得复合脉冲信息。 在优选频域实施例中，傅里叶变换成其频谱分量的时间测量以形成复合信息。 提供了一种用于使心跳和光脉冲相关的新方法和装置，由此获得对应于相同心跳的ECG R波和光脉冲信号的乘积，并且一个信号相对于另一个信号被时移，直到最大波形积 对应心跳确定。
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公开(公告)号：US4911167A
公开(公告)日：1990-03-27
申请号：US175152
申请日：1988-03-30
IPC分类号： A61B5/026 , A61B5/00 , A61B5/024 , A61B5/0245 , A61B5/0402 , A61B5/0428 , A61B5/145 , A61B5/1455 , A61B5/1464
CPC分类号： A61B5/14551 , A61B5/02416 , A61B5/0245 , A61B5/04282 , A61B5/7207 , A61B5/7225 , A61B5/7257
摘要： A method and apparatus for improving the calculation of oxygen saturation and other blood constituents by non-invasive pulse oximeters. The method and apparatus permit more accurate determination of blood flow by collecting time-measures of the absorption signal at two or more wavelengths and processing the collected time-measure to obtain composite pulsatile flow data from which artifacts have been filtered. The processing may occur in the time domain or in the frequency domain. In the preferred time domain embodiment, successive portions of periodic information are weighted and added together in synchrony to obtain the composite pulse information. In the preferred frequency domain embodiment, the time-measure is Fourier transformed into its spectral components to form the composite information. A new method and apparatus for correlating the heartbeat and optical pulse is provided whereby a product of the ECG R-wave and optical pulse signals corresponding to the same heartbeat is obtained, and one signal is time shifted relative to the other until a maximum waveform product corresponding to the heartbeat is determined.
摘要翻译： 一种用于通过非侵入式脉搏血氧计改善氧饱和度和其他血液成分计算的方法和装置。 所述方法和装置允许通过收集在两个或更多个波长处的吸收信号的时间测量值来对血流进行更准确的确定，并且处理所采集的时间量度以获得从其中过滤伪影的复合脉冲流数据。 该处理可以在时域或频域中发生。 在优选的时域实施例中，周期信息的连续部分被加权并且被同时加在一起以获得复合脉冲信息。 在优选频域实施例中，时间测量被傅里叶变换成其频谱分量以形成复合信息。 提供了一种用于使心跳和光脉冲相关的新方法和装置，由此获得对应于相同心跳的ECG R波和光脉冲信号的乘积，并且一个信号相对于另一个信号被时移，直到最大波形积 对应心跳确定。
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