my pulse ox drops upon standing...why? I am 86 and am having spells when I stand I get weak and fall down. I also see bright lights when this happens. I feel good otherwise and have had everything from head to toe checked all normal except my pulse ox drops when I stand.
Hello, The term is orthostatic hypotension. Reasons are many among which most common is age related (10% to 30% of older people have this). Others are certain Chat Doctor.  The physiology behind this is the inability of your body to cope up with the standing position in regard to the blood circulation because more blood is pulled by the gravity in trunk, legs, pulse, BP