Doctor insights on:
Causes Of Low Blood Oxygen Levels
Low blood oxygen levels, at what number would be low enough to cause a person to fall to the floor and have a blackout?
Depends: Its the rate of fall thats more important than the actual number. When the partial pressure of oxygen falls below 55 or 88% hemoglobin saturation the delivery of oxygen to our organs begins to decrease. If your organs, like the heart , is already damaged this drop can be very dangerous. If the organs are healthy they can tolerate this drop in oxygen levels for several minutes, sometimes even longe. ...Read moreSee 1 more doctor answer
When does low blood oxygen levels result in a coma? (I know it is under 74 because I was still sort of awake then although I suspect not much under.)
Well this varies: This varies a bit from person to person, so there is not really a number. It sounds like you are talking about the pulse oximetry reading, right? This is not used to generate concern about a coma. The pulse ox reading varies and is somewhat inaccurate. For most people, having insufficient oxygen for over 5 minutes results in brain damage, which may cause a coma. ...Read more
Iscrmic small blood vessel disease found on my brain mri, could this be connected to me having low blood oxygen levels, with passing out?
What is normal levels of oxygen in the blood? What is considered low and what is considered dangerous? Is levels in the 80s ok?
Oxygen level....: The oxygen saturation, or pulse oximetry, should be in the 90's normally. Any value of less than 88% on room air qualifies a patient for supplemental oxygen therapy. So, an oxygen saturation in the 80s is not normal. Your doctor will need to find out why your oxygen level is low and provide treatment. ...Read moreSee 2 more doctor answers
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