A.術(shù)前用降壓藥 B.術(shù)前不用降壓藥 C.術(shù)中用降壓藥 D.術(shù)后不用降壓藥 E.術(shù)前術(shù)后均用降壓藥
A.減少術(shù)后感染 B.防止術(shù)后腹脹 C.防止吻合口瘺 D.防止術(shù)后傷口裂開(kāi) E.防止麻醉或手術(shù)中嘔吐