Bias from pulse oximeters remains even if corrected by race, study finds wustl
oximeters can give biased readings for patients with dark skin, a team of researchers at Washington University in St. Louis is reporting that suggested raced-based adjustments to hypoxemia thresholds are insufficient; instead, researchers report, the oximeter itself must be fixed. Doctors have suggested"race corrected" pulse oximeter measurements by calculating a race-based"value" to subtract from the device's reading before using it to detect hypoxemia.
A pulse oximeter works by transmitting light through the body, typically through the fingertip. Oxygen is measured by how much of the light is absorbed by hemoglobin, a protein in the blood. But higher levels of skin pigmentation can lead to false oxygenation readings.
Correct readings are important because blood oxygenation percentage determines Medicare reimbursement and eligibility for drug treatment therapies in most hospitals.
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