可采用较低氦浓度的氦氧混合气体对慢阻肺患者进行氧疗或康复治疗。
It is suggested that helium-oxygen mixture with lower helium concentration can be used in oxygen therapy or rehabilitation therapy in COPD patients and decrease its clinical costs.
比较含80%氦和含60%氦的氦氧混合气体对肺活量及其相关指标的影响。
To compare the effect of helium-oxygen mixtures containing 80%helium or 60%helium on vital capacity(VC) and related index.
目的：比较含80%氦和含60%氦的氦氧混合气体对肺活量及其相关指标的影响。
AIM: To compare the effect of helium-oxygen mixtures containing 80% helium or 60% helium on vital capacity (VC) and related index.
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