Pulse oximetry
    41.
    发明授权
    Pulse oximetry 失效
    脉搏血氧饱和度

    公开(公告)号:US5431159A

    公开(公告)日:1995-07-11

    申请号:US732332

    申请日:1991-06-17

    IPC分类号: A61B5/145 A61B5/00 A61B5/1455

    CPC分类号: A61B5/14551

    摘要: Non-invasive oximetry wherein red and infrared light from light sources energized at different frequencies is applied to arterial blood-containing tissue of a living subject. The red and infrared light coming from this tissue is sensed in order to obtain frequency-muliplexed information as to the absorption of said light by said tissue, the information being processed in order to derive therefrom a measure of percent oxygen saturation of said blood. The processing includes filtering for separating information represented by red light absorption from information represented by infrared light absorption. In particular, both notch and bandpass filters are used, and AM detectors provide for further separating such information into DC and AC components.

    摘要翻译: 非侵入性血氧定量法,其中来自以不同频率通电的光源的红色和红外光被施加到活体受试者的动脉血液组织。 感测来自该组织的红色和红外光,以获得关于所述组织对所述光的吸收的频率复合信息,所述信息被处理以便从其中导出所述血液的氧饱和度百分比的量度。 该处理包括从由红外光吸收表示的信息中分离由红光吸收表示的信息的滤波。 特别地,使用陷波和带通滤波器,并且AM检测器用于将这些信息进一步分离成DC和AC分量。