JPH0318742A - Instrument for measuring saturation degree of oxygen - Google Patents

Instrument for measuring saturation degree of oxygen

Info

Publication number
JPH0318742A
JPH0318742A JP15211589A JP15211589A JPH0318742A JP H0318742 A JPH0318742 A JP H0318742A JP 15211589 A JP15211589 A JP 15211589A JP 15211589 A JP15211589 A JP 15211589A JP H0318742 A JPH0318742 A JP H0318742A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
oxygen
reflected light
saturation degree
inputting
inputted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15211589A
Inventor
Hiromasa Kono
Original Assignee
Terumo Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To exactly obtain the saturation degree of oxygen without being affected by hematocrit even in a region where the saturation degree of oxygen is low by determining the ratios of the reflected light intensity to the respective wavelengths which are logarithmically converted by a converting device and calculating the saturation degree of oxygen.
CONSTITUTION: A measurement is started by a measurement start instruction from an operation section 23 and plural reflected light intensities to the light corresponding to 660nm and 800nm wavelengths of LEDs 141 and 142 to which signal transmission is executed by an optical fiber 105 and signal reception by an optical fiber 106 are inputted. This inputting is executed by inputting the digital signal from an A/D converter 22 in synchronization with the timing signal for inputting of the timing signals 33 and 34 outputted form a pulse timing circuit 12 when these timing signals are inputted. The plural reflected light intensities to the respective wavelengths are inputted in this way and are stored in a RAM 25. The average value of the reflected light intensities thereof is then determined. The ratio of the values of the two wavelengths of the calculated intensities of the reflected light is obtd. and normalized and is further logarithmically converted. The saturation degree of oxygen is calculated and displayed 27.
COPYRIGHT: (C)1991,JPO&Japio
JP15211589A 1989-06-16 1989-06-16 Instrument for measuring saturation degree of oxygen Pending JPH0318742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15211589A JPH0318742A (en) 1989-06-16 1989-06-16 Instrument for measuring saturation degree of oxygen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15211589A JPH0318742A (en) 1989-06-16 1989-06-16 Instrument for measuring saturation degree of oxygen

Publications (1)

Publication Number Publication Date
JPH0318742A true true JPH0318742A (en) 1991-01-28

Family

ID=15533387

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15211589A Pending JPH0318742A (en) 1989-06-16 1989-06-16 Instrument for measuring saturation degree of oxygen

Country Status (1)

Country Link
JP (1) JPH0318742A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04312448A (en) * 1991-02-15 1992-11-04 Cobe Lab Inc Medical apparatus for connection to optical fiber probe
US5339375A (en) * 1991-10-03 1994-08-16 Medtronic, Inc. Connector for coupling a multiple channel cable to a cuvette
WO2007105805A1 (en) * 2006-03-10 2007-09-20 Kawasumi Laboratories, Inc. Blood characteristics measuring probe, cardiovascular system artificial organ and artificial lung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04312448A (en) * 1991-02-15 1992-11-04 Cobe Lab Inc Medical apparatus for connection to optical fiber probe
US5339375A (en) * 1991-10-03 1994-08-16 Medtronic, Inc. Connector for coupling a multiple channel cable to a cuvette
WO2007105805A1 (en) * 2006-03-10 2007-09-20 Kawasumi Laboratories, Inc. Blood characteristics measuring probe, cardiovascular system artificial organ and artificial lung
JP4944093B2 (en) * 2006-03-10 2012-05-30 川澄化学工業株式会社 Blood characteristic measurement probe, cardiovascular artificial organs and artificial lungs

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