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    • 10. 发明授权
    • Method for obtaining blood pressure data from optical sensor
    • 从光学传感器获得血压数据的方法
    • US06475153B1
    • 2002-11-05
    • US09568781
    • 2000-05-10
    • Mohammad KhairSalvador LopezRichard NgSanjar GhaemWilliam Olson
    • Mohammad KhairSalvador LopezRichard NgSanjar GhaemWilliam Olson
    • A61B502
    • A61B5/6843A61B5/02007A61B5/021A61B5/02416A61B5/0261A61B5/681A61B5/7285A61B2562/0233A61B2562/046
    • An optical sensor generates blood pressure data by obtaining two dimensional images of the surface of the patient's body, such as in the vicinity of the radial artery in the wrist area. Blood flow in the patient causes light to be reflected off a flexible reflective surface applied against the patient with a hold down pressure, and the scattering of light is sensed with a two-dimensional array of photo-detectors. The output of the photo-detectors during systolic and diastolic events is calibrated against known blood pressure measurements taken with a conventional air-cuff sphygmomanometer. Linear calibration relationships between output signal and blood pressure are obtained during calibration for some set of the photo-detectors. When blood pressure data is obtained from the patient, the linear calibration relationship between output signals and blood pressure is applied to the output signals from the set of photo-detectors, resulting in blood pressure data. The method provides for compensation for changes in hold down pressure and translation or rotation of the optical sensor relative to the patient. A preferred optical sensor arrangement for use in performing the method is also described.
    • 光学传感器通过获得患者身体的表面的二维图像,例如在手腕区域中的桡动脉附近来产生血压数据。 患者的血液流动导致光被从按压压力施加到患者上的柔性反射表面反射出来,并且用二维光电检测器阵列感测光的散射。 收缩期和舒张期事件期间光电探测器的输出是用常规气袖血压计测量的已知血压进行校准。 在一些光电检测器的校准期间,可以获得输出信号与血压之间的线性校准关系。 当从患者获得血压数据时,输出信号和血压之间的线性校准关系被施加到来自该组光电检测器的输出信号,从而产生血压数据。 该方法提供补偿压力压力和光学传感器相对于患者的平移或旋转的变化。 还描述了用于执行该方法的优选光学传感器装置。