单选题 A client who has sustained a head injury is to receive mannitol (Osmitrol) by IV push. In evaluating the effectiveness of the drug, the nurse should expect to find
A. increased lung expansion.
B. decreased cerebral edema.
C. decreased cardiac workload.
D. increased cerebral circulation.

【正确答案】 B

【答案解析】Mannitol, an osmotic diuretic, is used to decrease cerebral edema in clients with head injuries. Increased lung expansion, decreased cardiac workload, and increased cerebral circulation aren't effects of mannitol.