Objective:To investigate the clinical effects of acute hypervolemic hemodilution (AHH) with 6% hydroxyethyl starch (HAES) , gelofusine, and polygeline during operation.

• 目的:观察6%25贺斯(HAES)、血定安、菲克雪浓三种胶体液用于手术麻醉中的临床效果。