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目的：观察重复利用氦气的循环式氦－氧混合气辅助呼吸装置对哮喘患者的作用。方法：选择８例重症支气管哮喘急性发作患者，通过重复利用氦气的循环式氦－氧混合气辅助呼吸装置呼吸氦－氧混合气（７９％Ｈｅ），观察肺功能及血气的变化。结果：氦－氧混合气可以降低气负荷，促进氧合，增大呼气流速；起效迅速，但后续效应短暂。结论：循环式氦－氧混合气辅助呼吸装置设计思路比较理想，可以节省氦气的消耗，取得了较好的临床疗效
OBJECTIVE: To observe the effect of helium-recycle Helium-Oxygen-Assisted breathing apparatus on asthma patients. Methods: Eight patients with severe acute asthma were selected and their helium - oxygen mixture (79% He) was inhaled by repeated helium - oxygen assisted breathing apparatus. The changes of pulmonary function and blood gas were observed. Results: The helium-oxygen mixture can reduce the gas load, promote oxygenation and increase the expiratory flow rate. The onset of action is rapid but the follow-up effect is transient. CONCLUSIONS: The design idea of a helium-oxygen hybrid assisted breathing apparatus is ideal, which can save the consumption of helium and achieve better clinical efficacy