Kaplan says: Mannitol is used in anuric states
First Aid says: Mannitol is contraindicated in anuria
Which is right? They're both right. Huh? It depends on the cause of anuria. Here is what the ultimate encyclopedia of medicine (wikipedia) says:
"Mannitol is a medicine that is used to increase the amount of water removed from the blood and thus improve the blood flow to the kidneys. However, mannitol is contraindicated in anuria secondary to renal disease, severe dehydration, intracranial bleeding (unless during craniotomy), severe pulmonary congestion, or pulmonary edema."