Method and apparatus for determining physiological characteristics

Patent 6594511 Issued on July 15, 2003. Estimated Expiration Date:

March 23, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Application

No. 815827 filed on 03/23/2001

US Classes:

600/324, And other cardiovascular parameters600/322, Determining blood constituent600/336Detects constituents while excluding components (e.g., noise)

Examiners

Primary: Winakur, Eric F.
Assistant: Kremer, Matthew

Attorney, Agent or Firm

Francis Law Group

International Class

A61B 005/00

Abstract

A method for determining physiological characteristics comprising the steps of (a) acquiring a first blood oxygen signal from a subject, the blood oxygen signal having an undesirable artifact signal component; (b) acquiring an additional physiological signal 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 and the physiological signal 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; and (e) processing the reference waveform and the physiological signal to provide a second blood oxygen saturation signal corresponding to the blood oxygen saturation level of said subject.