Despite the wide use of pulse oximetry as a clinical monitoring device for non-invasive measurement of hemoglobin oxygen saturation and heart rate, reports have shown its high sensitivity to motion artifact, rendering the device less accurate and reliable during field applications such as in military environments or ambulatory transport. This paper investigates the effects of sensor weight, localized heating and locally applied pressure on measurement accuracy of a prototype forehead pulse oximeter during a simulated military transport environment. The results yielded that increased sensor weight led to measurement errors and more severe signal corruption, while increased heat (up to 42oC) and pressure (up to 60mmHg) decreased errors and improved signal fidelity.
Worcester Polytechnic Institute
Major Qualifying Project
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