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Is a Low-Cost Home Pulse Oximeter Helpful in Blood Flow Restriction Training?
Salvador Santiago-Pescador1, Juan Martín-Hernández1, José Pinto-Fraga1
1"i+HeALTH" Strategic Research Group, Miguel de Cervantes European University, Valladolid, Spain.
Journal of Sport Rehabilitation
|June 5, 2025
Summary
Low-cost home pulse oximetry (POx) is not reliable for determining arterial occlusion pressure (AOP). Blood flow does not decrease linearly with applied external pressure in limbs.
Area of Science:
- Vascular physiology
- Biomedical engineering
- Medical device validation
Background:
- Arterial occlusion pressure (AOP) is crucial for assessing vascular health.
- Low-cost home pulse oximetry (POx) devices are increasingly used for monitoring.
- The accuracy of POx for AOP estimation requires validation.
Purpose of the Study:
- To evaluate the validity of home pulse oximetry (POx) for determining arterial occlusion pressure (AOP).
- To compare blood flow (BF) responses in upper and lower limbs under varying external pressures relative to AOP.
Main Methods:
- Cross-sectional study involving 42 subjects.
- Arterial occlusion pressure (AOP) measured using pulse oximetry (POx) and high-resolution Doppler ultrasound.
- Blood flow (BF) and velocity assessed at 0%, 25%, 50%, 75%, and 90% of AOP in limbs.
Main Results:
- Significant differences (P < .001) were found between POx and Doppler ultrasound for AOP measurement.
- POx demonstrated poor accuracy in identifying AOP (ROC: 0.644 upper, 0.477 lower limb).
- Blood flow (BF) decreased non-linearly with applied pressure, with limb-specific responses.
Conclusions:
- Home pulse oximetry (POx) is not a suitable device for estimating arterial occlusion pressure (AOP).
- Blood flow (BF) reduction under external pressure is nonlinear in both upper and lower limbs.
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