用PEEP治疗单侧肺水肿,血气值可能无改变甚至更恶化。这可能是由于潮气量(V_T)分布不均,病肺顺应性不良仅小部分V_T能进入病肺所致。结果是正常肺过度通气并过分膨胀,而病肺的静脉掺杂却增加。解决的办法是进行选择性通气。但操作困难,也不可能常规应用。文献报道病人侧卧,病肺 With PEEP treatment of unilateral pulmonary edema, blood gas values ​​may not change or even worse. This may be due to uneven distribution of tidal volume (V_T), pulmonary compliance poor only a small part of V_T can enter the diseased lung. The result is hyperventilation of normal lungs and excessive expansion, and increased pulmonary vein doping. The solution is to carry out selective ventilation. However, the operation is difficult, it is impossible to conventional applications. Reported in the literature side of the patient, diseased lung