Cut off limit for deoxygenated hemoglobin for appearance of cyanosis is?
Ans. B >5gm%Ref: Ganong, 25th ed. pg. 642Cyanosis appears whenever the magnitude of reduced hemoglobin level of blood in capillaries is >5 gm%.
>4 gm%
>5 gm%
< 2 gm%
<4 gm%
Respiratory System