临床静脉营养支持(ＰＮ)是20世纪临床医学四大进展之一。其在临床上的广泛应用,挽救了众多危重患者的生命。特别是在外科围手术期的应用,由于可大大降低大手术的死亡率,已为多数外科医生所共识。但对于ＰＮ对免疫功能的影响尚有争议:部分学者认为,ＰＮ支持不会影响机体的?.. Clinical vein nutrition support (PN) is one of the four major advances in clinical medicine in the 20th century. Its extensive clinical application has saved the lives of many critically ill patients. Especially in the surgical perioperative application, it has been agreed by most surgeons that the mortality of major operations can be greatly reduced. However, there are controversies about the effect of PN on immune function: Some scholars believe that PN support will not affect the body?