What causes cyanosis?

Typically oxygen deprivation, but it is common it conditions like hypothermia and hypovolemic shock, where blood is shunted away from the skin to preserve the vital organs. Another cause in neonates...

Peripheral cyanosis in the neonate is the result of sluggish tissue perfusion. The smaller baby lacking fat may use spasm of the capacitnece vessels in the limbs and blood sequestrion in the non...

Hyperbilirubinemia causes jaundice.

Congenital heart disease can cause cyanosis. So can congestive heart failure.

Decreased pulmonary blood flow alone does not cause cyanosis. It is when decreased pulmonary blood flow is associated with right to left shunting (ie Tetralogy of fallot) that it is associated with...