分葉別肺胞気ガス組成に関する研究

Lobar Alneolar gas concentration: Effect of body position

緒言

　肺胞気のガス組成が正常肺においても，換気又は拡散の変動によつて異つて来る事実は多くの研究者の注目するところである。

　Martinらは1953年にこの事実に注目し，正常人の肺上葉および下葉の肺胞気を同時に採取し，そのガス組成の体位による変動を検討し報告している。

We studied differences of pulmonary lober alveolar gas concentration by the exchange of body position.

Body position affects lobar gas concentrations in the following manner : a) When upright, the end-expiratory oxygen is higher and carbon dioxide is lower in the right upper lobe than in the right lower lobe.

b) When supine, the end-expiratory oxygen is higher and the carbon dioxide concentration is lower in the right lower lobe than in the right upper robe.

c) We recieved the same results in the left upper lobe and lower lobe.

d) When right lateral position, the end-expiratory oxygen is higher and carbon dioxide is lower in the left lower lobe than in the right lower lobe.

e) When left lateral position, the end-expiratory oxygen is higher and carbon dioxide is lower in the right lower lobe than in the left lower lobe.