Least (A-V )O2 difference is seen in
Hypoxic hypoxia
Anemic hypoxia
Stagnant hypoxia
Histotoxic hypoxia
Histotoxic hypoxia Cause Decreased ability of cell to use O2 Examples Cyanide poisoning PaO2 Normal Hb content Normal Aerial O2 content or %O2 saturation Normal A-V PO2 difference Decreased Peripheral chemoreceptor stimulation Present (toxin prevents chemoreceptor to use oxygen) Cyanosis Present
Respiratory System Pa 3