Prevalence of Long COVID is not well know however, A study in the United Kingdom found that approximately 10% of individuals who had COVID-19 experienced ongoing symptoms for at least 12 weeks after the initial infection.
Other studies have suggested that the prevalence may be even higher, with some estimates as high as 40%.
Pulse oximetry is the non-invasive measurement of a person’s oxygen saturation, the value expressed is SpO2. The most common forms of SpO2 testing is with a sensor attached to the finger, earlobe (pediatric application is often on the child’s toe), or forehead (reflectance testing). It is important to understand that perfusion, skin pigmentation and thickness, ambient light sources and nail polish and acrylic nails all will affect the acuity of pulse oximetry or SpO2 testing.
