营养支持总原则严重应激后机体代谢率明显增高,出现一系列代谢紊乱,体重丢失平均0.5~1.0kg/d。机体营养状况迅速下降及发生营养不良(体重丢失≥10%)是危重症患者普遍存在的现象。对危重症患者来说,维持机体水、电解质平衡为第一需要。在复苏早期、血流动力学尚未稳定或存在严重的代谢性酸中毒阶段,均不是开始营养支持的安全时机。只有在内环境相对稳定后 The general principles of nutritional support after severe stress metabolic rate was significantly increased, a series of metabolic disorders, weight loss average 0.5 ~ 1.0kg / d. Rapid decline in body nutrition and malnutrition (weight loss ≥ 10%) is a common phenomenon in critically ill patients. For critically ill patients, maintaining the body’s water, electrolyte balance is the first need. In the early stages of recovery hemodynamics are not yet stable or there is a serious metabolic acidosis stage, are not safe to start nutritional support. Only after the internal environment is relatively stable