To detect moderate to severe obstructive sleep apnoea (OSA) in children, nocturnal pulse oximetry (NPO) may be a reasonable alternative to cardiorespiratory polygraphy if the latter is not accessible.

Dr. Takuo Aoyagi, a Japanese bioengineer, was the first to invent pulse oximetry in 1974. 2 The pulse oximeter is based on the light absorption characteristics of hemoglobin at different wavelengths.

A portable device used to detect blood oxygen levels revolutionized the medical field 50 years ago and is now receiving essential updates Efforts to improve the accuracy of pulse oximetry readings for ...