partial pressure of oxygen in arterial blood(redirected from PaO 2)
partial pressure of oxygen in arterial blood (PaO2)
the portion of total blood gas pressure exerted by oxygen. It is lower than normal in patients with asthma, obstructive lung disease, or certain blood diseases and in healthy individuals during vigorous exercise. The normal PaO2 in arterial blood is 95-100 mm Hg.