A) Anemia - Patient has nl PaO2 and decreased O2 content. Also patient is hyperventilating and CO2 is thus low.
B) Drug-induced alveolar hypoventilation - Arterial PO2 would be low&CO2 high
C) Residence at a high altitude - Arterial PO2 would be low
D) Severe regional mismatching of alveolar ventilation and pulmonary capillary perfusion - Pulmonary Embolus would cause a decrease in arterial PO2
E) Voluntary hyperventilation - Arterial O2% content would be nl
Anemia causes hypoxia without hypoxemia. Meaning low O2 delivery to tissues but not low O2 saturation of the blood. The lungs can adequately deliver O2 to the arterials so PaO2 is normal. Anemia causes low O2 content because you have relatively low amounts of Hb to carry oxygen.
submitted by โlola915(57)
Mixed venous O2 content 8 vol% (N=10%โ16%)
A) Anemia - Patient has nl PaO2 and decreased O2 content. Also patient is hyperventilating and CO2 is thus low.
Anemia causes hypoxia without hypoxemia. Meaning low O2 delivery to tissues but not low O2 saturation of the blood. The lungs can adequately deliver O2 to the arterials so PaO2 is normal. Anemia causes low O2 content because you have relatively low amounts of Hb to carry oxygen.
O2 content = (1.34 ร Hb ร Sao2) + (0.003 ร Pao2)