Medically reviewed by Steffini Stalos, DO Key Takeaways The oxygen desaturation index (ODI) measures how often and how much your blood oxygen level drops while you sleep.A normal ODI is fewer than ...

Respiratory desaturation, known as hypoxemia in medical terms, is when you have low blood oxygen saturation. Your blood oxygen saturation is a measure of how much oxygen is in your blood. A normal ...

Lindsay Modglin is a nurse and professional writer who regularly writes about complex medical topics, as well as travel and the great outdoors. She holds a professional certificate in scientific ...

At altitudes over 2,400 metres, lack of oxygen — a condition called hypoxia — can cause acute mountain sickness. Incidence ...