公开(公告)号：US4714341A

公开(公告)日：1987-12-22

申请号：US704772

申请日：1985-02-21

Applicant: Kenji Hamaguri ,  Takao Sakai

Inventor： Kenji Hamaguri ,  Takao Sakai

IPC: A61B5/00 ,  G01J1/16 ,  G01N21/31 ,  G01N33/16

CPC classification number: A61B5/14551 ,  G01N21/314 ,  A61B5/7232 ,  G01J2001/1668 ,  G01N2021/3144 ,  G01N2021/3148 ,  G01N2021/3166 ,  G01N2201/1241

Abstract: An oximeter for measuring oxygen saturation in arterial blood includes a light source for projecting light to a body member to be measured, a light responsive circuit for receiving the light which has transmitted through said body member and for generating at least first, second and third signals at three different wavelengths, and a calculator for calculating at least first SaO.sub.2 data using first and second signals and second SaO.sub.2 data using first and third signals. It is detected whether or not a difference between the first and second SaO.sub.2 data is within a predetermined level. When the difference is within the predetermined level, it is assumed that the first and/or second SaO.sub.2 data are valid, but if not, they are assumed as invalid.

Abstract translation: 用于测量动脉血液中的氧饱和度的血氧计包括用于将光投射到待测量的身体构件的光源，用于接收透过所述本体构件的光并用于产生至少第一，第二和第三信号的光响应电路 在三个不同的波长处，以及计算器，用于使用第一和第二信号和使用第一和第三信号的第二SaO2数据来计算至少第一SaO2数据。 检测第一和第二SaO2数据之间的差是否在预定水平内。 当该差在预定水平之内时，假设第一和/或第二SaO2数据是有效的，但如果不是，则假设它们是无效的。

公开(公告)号：US4586513A

公开(公告)日：1986-05-06

申请号：US467431

申请日：1983-02-17

Applicant: Kenji Hamaguri

Inventor： Kenji Hamaguri

IPC: A61B5/00 ,  A61B5/145 ,  A61B5/1455 ,  G01J1/16 ,  G01N21/31 ,  G01N33/72 ,  A61B6/00

CPC classification number: A61B5/14551 ,  G01N21/314 ,  G01J1/1626 ,  G01J2001/161 ,  G01N2201/1245

Abstract: A noninvasive device for photoelectrically measuring a property of arterial blood is provided. Light that contacts living tissue with arterial blood is converted into a pair of electrical signals. The electrical signals are processed to provide information of the amplitude of the measured signals and are further processed to produce a final output signal that is substantially a square function of a ratio between the electrical signals representative of the amplitudes.