Title:
METHOD AND APPARATUS FOR DETERMINING PHYSIOLOGICAL CHARACTERISTICS
Document Type and Number:
WIPO Patent Application WO2001073394
Kind Code:
A3
Abstract:
A method for determining physiological characteristics comprising the steps of (a) acquiring a first blood oxygen signal (S3 & S4) from a subject, the blood oxygen signal (S3 & S4) having an undesirable artifact signal component; (b) acquiring an additional physiological signal (S2) having a heart rate component using an acquisition technique that is different and independent from the first acquiring step; (c) processing the first blood oxygen signal (S3 & S4) and the physiological signal (S2) to provide a first waveform having a reduced level of the artifact signal component therein; (d) processing the first waveform and the physiological signal to provide a reference waveform (R); and (e) processing the reference waveform (R) and the physiological signal to provide a second blood oxygen saturation signal (S5) corresponding to the blood oxygen saturation level of the subject.
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Inventors:
STONE ROBERT T (US)
MILLS ALEXANDER K (US)
MILLS ALEXANDER K (US)
Application Number:
PCT/US2001/009565
Publication Date:
March 14, 2002
Filing Date:
March 23, 2001
Export Citation:
Assignee:
KINDERLIFE INSTR INC (US)
STONE ROBERT T (US)
MILLS ALEXANDER K (US)
STONE ROBERT T (US)
MILLS ALEXANDER K (US)
International Classes:
A61B5/00; A61B5/0245; A61B5/352; (IPC1-7): A61B5/00
Foreign References:
| US4960126A | 1990-10-02 | |||
| US4275744A | 1981-06-30 | |||
| US5685299A | 1997-11-11 | |||
| US4981141A | 1991-01-01 | |||
| US5971930A | 1999-10-26 | |||
| US4911167A | 1990-03-27 |
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