Patent ID: 6556852
Filing Date: 2003-04-29
Classification: A61B

Abstract:
A configuration of sensors in a non-invasive emplacable device for continuously measuring and monitoring multiple physiological variables from a single site, comprising:an earpiece having a curve; a pulse oximetry sensor having a miniaturized set of LEDs and photosensors configured for pulse oximetry measurements in the reflectance mode and located in said earpiece so as to position said pulse oximetry sensor against a rear wall of an ear canal upon earpiece insertion to reduce noise from motion artifacts; a thermopile of no larger than 7 mm. in diameter located on said earpiece beyond said curve in said earpiece so as to position said thermopile past a second turn of an external auditory meatus of said ear canal upon insertion so as to view a tympanic membrane, said thermopile further including a reference temperature sensor attached to a base portion of said thermopile for ambient temperature compensation; and a shield positioned within said earpiece to block stray light and electromagnetic interference.