05226417 is referenced by 222 patents and cites 7 patents.

An apparatus for detecting movement in patients coupled to pulse oximeters and a method for using the signal generated by the apparatus to filter out the effects of motion from the test results generated by the pulse oximeter are disclosed. In a preferred embodiment, a piezoelectric film located in close proximity to the pulse oximeter's sensor provides a voltage signal whenever movement occurs near the sensor. This voltage signal is processed and the resulting signal is used to correct the oximeter's measurements. In addition to piezoelectric film, accelerometers and strain gauges are also usable to provide a signal indicative of motion.

Title
Apparatus for the detection of motion transients
Application Number
7/667152
Publication Number
5226417
Application Date
March 11, 1991
Publication Date
July 13, 1993
Inventor
Jessica A Warring
Millbrae
CA, US
Deborah A Briggs
San Ramon
CA, US
Adnan I Merchant
Fremont
CA, US
Robert L Clark
Hayward
CA, US
David B Swedlow
Foster City
CA, US
Agent
Townsend and Townsend Khourie and Crew
Assignee
Nellcor
CA, US
IPC
A61B 5/00
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