Objective To observe the effect of preoperative acute hypervolemic hemodilution(AHHD) with 6% Hydroxyethyl Starch(HES) on coagulation of patients with lung cancer during periopartive period.

• 目的用6%25羟乙基淀粉(hydroxyethyl starch,HES)溶液行急性高容血液稀释(acute hypervolemic hemodilution,AHHD),观察其对肺癌患者围手术期凝血功能的影响。