为探索吸入一氧化氮治疗高原肺水肿的效果，对快速进入海拔５４００ｍ第３天出现急性高原反应的３２名青年，进行了低浓度ＮＯ的吸入治疗，检测血流动力学指标及拍摄胸部正位Ｘ线片。结果：急进海拔５４００ｍ第３天血流为高排低阻性改变，由于心脏排出增高及肺部淤血使两肺明显缩小，１４例有间质性肺水肿的点片状阴影；吸入ＮＯ后即刻血流指标明显改善，３ｈ后肺部间质性水肿征象消失。说明吸入低浓度ＮＯ对急性高原肺水肿有治疗和防止进一步发展的作用 In order to explore the effect of inhaled nitric oxide in treatment of high altitude pulmonary edema, 32 young people who had acute altitude sickness on the third day after the altitude 5400m were treated with inhaled NO at a low concentration. The hemodynamic indexes and the chest anteroposterior position X-ray film. Results: On the third day after 5400 m altitude, the blood flow changed to high-row and low-resistance. The lungs were significantly reduced due to the increased cardiac output and pulmonary congestion, and 14 cases had patchy shadows of interstitial pulmonary edema. Blood flow indicators improved significantly, 3h after pulmonary interstitial edema disappeared. Description of inhaled low concentrations of NO on the treatment of acute high altitude pulmonary edema and prevent the further development of the role