Nutritional variables such as body weight,TSH,AMC,serum albumin,transferin,serum amino acids and accumulated nitrogen balance were measured preoperatively and on 8 d after operation.

• 检测术前和术后第8天病人的体重、肱三头肌皮褶厚度、上臂肌围、血浆白蛋白、转铁蛋白、血清氨基酸谱和累计氮平衡等营养指标。