Development of a smartphone-based pulse oximeter with adaptive SNR/power balancing

Millions worldwide suffer from diseases that exhibit early warnings signs that can be detected by standard clinical-grade diagnostic tools. Unfortunately, such tools are often prohibitively expensive to the developing world leading to inadequate healthcare and high mortality rates. To address this p...

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Bibliographic Details
Main Authors: Phelps, Tom, Haowei Jiang, Hall, Drew A.
Format: Conference Proceeding
Language:English
Subjects:
Heart rate
Lifting equipment
Light emitting diodes
Signal to noise ratio
Smart phones
Online Access:Get full text
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Summary:Millions worldwide suffer from diseases that exhibit early warnings signs that can be detected by standard clinical-grade diagnostic tools. Unfortunately, such tools are often prohibitively expensive to the developing world leading to inadequate healthcare and high mortality rates. To address this problem, a smartphone-based pulse oximeter is presented that interfaces with the phone through the audio jack, enabling point-of-care measurements of heart rate (HR) and oxygen saturation (SpO 2 ). The device is designed to utilize existing phone resources (e.g., the processor, battery, and memory) resulting in a more portable and inexpensive diagnostic tool than standalone equivalents. By adaptively tuning the LED driving signal, the device is less dependent on phone-specific audio jack properties than prior audio jack-based work making it universally compatible with all smartphones. We demonstrate that the pulse oximeter can adaptively optimize the signal-to-noise ratio (SNR) within the power constraints of a mobile phone (
ISSN:1557-170X
2694-0604
DOI:10.1109/EMBC.2017.8037561