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    • 8. 发明授权
    • Blood oxygen saturation measuring apparatus
    • 血氧饱和度测量仪
    • US08565846B2
    • 2013-10-22
    • US12710339
    • 2010-02-22
    • Yoshinobu OnoTakeshi KojimaJun Motogi
    • Yoshinobu OnoTakeshi KojimaJun Motogi
    • A61B5/00
    • A61B5/14551A61B5/0816A61B5/4818
    • A blood oxygen saturation measuring apparatus includes: a light emitter adapted to emit, to living tissue of a subject, at least two light beams which have different wavelengths from each other; a light receiver adapted to receive the light beams which are transmitted through or reflected from the living tissue, the light receiver which converts the received light beams to electric signals corresponding to receiving intensities of the light beams, respectively; an extractor which extracts frequency components corresponding to changes of the receiving intensities according to a variation of a blood volume of a vein in the living tissue due to respiration of the subject, from the electric signals, respectively; an attenuation ratio calculator which calculates a first attenuation ratio based on amplitudes of the extracted frequency components; and an oxygen saturation calculator which calculates a first blood oxygen saturation in the vein based on the first attenuation ratio.
    • 血氧饱和度测量装置包括:适于向对象的生物体组织发射彼此具有不同波长的至少两个光束的光发射器; 光接收器,其适于接收透射通过活体组织或从生物体组织反射的光束,所述光接收器分别将接收到的光束转换成对应于光束的接收强度的电信号; 提取器,分别从电信号中分别根据受试者的呼吸而根据活体组织中的静脉血容量的变化来提取对应于接收强度的变化的频率成分; 衰减比计算器,其基于所提取的频率分量的振幅来计算第一衰减比; 以及氧饱和度计算器,其基于所述第一衰减比计算静脉中的第一血氧饱和度。