Learn why researchers aren't sold on pulse oximeters for monitoring COVID severity at home.

Pulse oximetry is a noninvasive test that looks at the oxygen saturation level in your blood, which is an important indicator of your overall health.

Learn about one of the most common initial screening tests for oxygen levels and sleep apnea called overnight oximetry.

Blood oxygen measurements and signs like skin discoloration are not as accurate in Black patients with COVID-19 as in White patients.

Oxygen saturation measures how much oxygen is carried by the hemoglobin in your blood. Learn causes of low blood oxygen levels and how to raise them.

Diagnosing COPD may involve tests such as spirometry, pulse oximetry, arterial blood gases, chest X-ray, CT scan, a CBC, and genetic screening.

If you don’t have a primary care physician during the pandemic, experts recommend self-monitoring COVID-19 symptoms, if you're experiencing a mild case.

Diagnosing carbon monoxide poisoning is difficult because of the nature of the condition. Doctors have to use history, tests, and examination.