Optimizing Portable Pulse Oximeter Measurement Accuracy and Consistency During Exercise

Authors:
  • JLJonas LaPier
    Jonas LaPier
  • MCMegan Chatellier
    Megan Chatellier
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Abstract
Monitoring oxygen saturation (SpO2) in some patient populations during exercise is vital. The objectives of this study were to determine whether under conditions of artificial hypoperfusion pulse oximeter performance during exercise was influenced by sensor type, attachment clip reinforcement, or a low pressure arm cuff. Six different portable oximeter models were tested on study participants at rest with a control (normothermic) and experimental (hypothermic) hand. Oximeters were then tested during treadmill walking at 1 and 2 mph with the experimental hand remaining hypothermic. Electrocardiographic measurements of heart rate were also taken simultaneously. There were differences in SpO2 values between oximeter pairs following cold exposure at rest for most models (5 out of 6) but during walking for only 1 model. There were also differences between oximeter and electrocardiographic heart rate measurements for some models when study participants walked on a treadmill at 1 mph (1 out of 6) and 2 mph (3 out of 6). Results suggest that oximeter performance is better when measuring SpO2 than heart rate. Cold-induced hypoperfusion caused inaccuracies in SpO2 measurements, which were greater at rest than during exercise. Study results also suggest that some pulse oximeters perform better when the oximeter sensor attachment clip is reinforced with an elastic band.

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