Oximeter with motion detection for alarm modification

Details Oximeter with motion detection for alarm modification Oximeter with motion detection for alarm modification

1996-01-29

1997-09-02

Sykes, Angela D.

Surgery

Truss

Pad

356 41, A61B 500

Patent

active

056621060

ABSTRACT:
A pulse oximeter which modifies the alarm condition when motion is detected. Basically, if the lack of a pulse is determined to be as a result of motion artifact, the generation of an alarm is postponed. In addition, the display indicates that motion is present and that the last reading is questionable due to the presence of motion. The invention also determines if motion artifact is present from the pulse oximeter detector signal itself. The ratio of the positive and negative peaks of the derivative of the pulse signal are compared to a motion/blood pulse threshold.

REFERENCES:
patent: 4381788 (1983-05-01), Douglas
patent: 4824242 (1989-04-01), Frick et al.
patent: 5025791 (1991-06-01), Niwa
patent: 5206807 (1993-04-01), Hatke et al.
patent: 5225672 (1993-07-01), Jones
patent: 5368026 (1994-11-01), Swedlow et al.

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