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    • 5. 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。
    • 7. 发明授权
    • Heart pulse wave detecting device using iterative base point detection
    • 心脏脉搏波检测装置采用迭代基点检测
    • US5584299A
    • 1996-12-17
    • US507142
    • 1995-07-26
    • Yoshio SakaiJun MotogiSunao Takeda
    • Yoshio SakaiJun MotogiSunao Takeda
    • A61B5/022A61B5/021
    • A61B5/6826A61B5/022A61B5/6838A61B5/7239A61B5/6824
    • A CPU of a control unit receives a blood pressure pulse wave signal, through an AC amplifier and an A/D convertor. The CPU differentiates, for the smoothing of the waveform, the heart pulse wave signal every step of decreasing the pressure in the cuff, thereby detecting a descending zero-cross point m of the differential wave. Further, the CPU detects a slope peak point P' while tracing back from the descending zero-cross point m. The CPU determines the peak points of the pulse wave by using the heart pulse wave signal that is not differentiated. Thereafter, the CPU determines the base points of the pulse wave tracing back from the maximum-slope point, determines the peak value of the heart pulse wave signal in all the steps of decreasing the pressure in the cuff, and finally computes a systolic blood pressure and a diastolic blood pressure.
    • 控制单元的CPU通过AC放大器和A / D转换器接收血压脉搏波信号。 为了平滑波形,CPU对每一步减小袖带压力的心搏波信号进行微分,从而检测差动波的下降零交叉点m。 此外,CPU从下降的零交叉点m追溯回检测斜率峰值点P'。 CPU通过使用不区分的心脏脉搏波信号来确定脉搏波的峰值点。 此后,CPU从最大斜坡点确定脉搏波跟踪的基点,在减小袖带压力的所有步骤中确定心脏脉搏波信号的峰值,并最终计算收缩压 和舒张压。