My understanding is that blood O2 drops when you have, say, pneumonia and your lungs aren't functioning correctly. When my boss's infant daughter had a nasty virus 2 years ago, her blood O2 was 84. It should normally be in the high 90s; somewhat lower for smokers. So they put her on an oxygen tube for a few days while the lungs cleared out.
(Other factors also lower it--when they knocked PoC out last summer to reset his shoulder in the ER, they had someone watching his blood O2 because the anaesthetic slows ALL body functions. When it dropped to the low 90's they hooked up a tube. )
no subject
(Other factors also lower it--when they knocked PoC out last summer to reset his shoulder in the ER, they had someone watching his blood O2 because the anaesthetic slows ALL body functions. When it dropped to the low 90's they hooked up a tube. )
Feel better soon!