Adaptive Pulse Width Control and Sampling for Low Power Pulse Oximetry

Gubbi, Sagar Venkatesh and Amrutur, Bharadwaj (2015) Adaptive Pulse Width Control and Sampling for Low Power Pulse Oximetry. In: IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, 9 (2, SI). pp. 272-283.

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Abstract

Remote sensing of physiological parameters could be a cost effective approach to improving health care, and low-power sensors are essential for remote sensing because these sensors are often energy constrained. This paper presents a power optimized photoplethysmographic sensor interface to sense arterial oxygen saturation, a technique to dynamically trade off SNR for power during sensor operation, and a simple algorithm to choose when to acquire samples in photoplethysmography. A prototype of the proposed pulse oximeter built using commercial-off-the-shelf (COTS) components is tested on 10 adults. The dynamic adaptation techniques described reduce power consumption considerably compared to our reference implementation, and our approach is competitive to state-of-the-art implementations. The techniques presented in this paper may be applied to low-power sensor interface designs where acquiring samples is expensive in terms of power as epitomized by pulse oximetry.

Item Type:	Journal Article
Publication:	IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Additional Information:	Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Keywords:	Design-space analysis; low-power; pulse oximetry; SpO2; tracking-loop
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	15 Jun 2015 07:22
Last Modified:	15 Jun 2015 07:22
URI:	http://eprints.iisc.ac.in/id/eprint/51655

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