Spring wing assembly for photoplethysmorgraphic sensor
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United States of America Patent
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Dec 13, 2011
Grant Date -
Dec 27, 2007
app pub date -
Jun 22, 2006
filing date -
Jun 22, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A photoplethysmographic sensor designed for use on the presenting portion of a fetus during labor and delivery. The sensor has a non-deployed state in which the sensor presents a smaller footprint, or cross sectional area, for transvaginal insertion. Once the sensor is applied to the fetal tissue it is moved into the deployed state, which has a larger footprint or cross sectional area, than the sensor does in the non-deployed state. The deployed state optimizes the physical distance between the light emitter and the photodetector to maximize the photoplethysmographic measurement accuracy from the fetal tissue.
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