What's a low oxygen level in general?

92 % plus....: In all patients, but certainly in post op patients, we'd like to see oxygen saturation of at least 92%. Supplemental oxygen may be necessary, at least for a short time. Good pulmonary toilet and breathing exercises are also employed. Good luck.

Hypoxemia: Low oxygen level in blood is called hypoxemia.Human body needs certain level of oxygen circulating in your blood for cells and tissues.When this level falls below certain amount it is called hypoxemia and it can cause shortness of breath.It can be estimated by pulse oximeter;confirmed by arterial blood oxygen level.Normal pulse oximeter read is 95to100%, below90 is hypoxemia.Blood po2 85to10ommhg.