Portable pulse oximeters demonstrated better performance measuring SpO2 than heart rate, though cold-induced hypoperfusion caused SpO2 inaccuracies that were greater at rest than during exercise.
Observational
Does artificial hypoperfusion, sensor type, or attachment clip reinforcement affect the accuracy of portable pulse oximeters for measuring SpO2 and heart rate during exercise?
Cold-induced hypoperfusion causes inaccuracies in pulse oximeter SpO2 measurements, particularly at rest, and heart rate measurements are less accurate than SpO2 during exercise.
Purpose: Monitoring oxygen saturation (SpO 2 ) 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. Methods: 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. Results: There were differences in SpO 2 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). Conclusions: Results suggest that oximeter performance is better when measuring SpO 2 than heart rate. Cold-induced hypoperfusion caused inaccuracies in SpO 2 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.
LaPier et al. (Fri,) reported a observational. Portable pulse oximeters vs. Normothermic hand and electrocardiographic measurements was evaluated on SpO2 and heart rate measurement accuracy. Portable pulse oximeters demonstrated better performance measuring SpO2 than heart rate, though cold-induced hypoperfusion caused SpO2 inaccuracies that were greater at rest than during exercise.
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