肺換気機能,特に中下葉換気機能に及ぼす体位変換の影響について
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概要
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Respiratory capacity of each lung and the (middle) lower lobe was measured, and diaphragmatic movement was examined with X-rays in 26 patients with pulmonary tuberculosis. Similar tests were carried out in 10 normal, healthy subjects, and the results for each group were compared with each other. 1. In normal persons, changes in respiratory capacity due to variation in posture were nearly the same for cach lung as for the (middle) lower lobe. The minute volume and oxygen consumption were higher in the lower lung in lateral decubitus than in dorsal decubitus, and were lower in the upper lung in lateral decubitus than in dorsal decubitus. The same was true of the tidal volume and inspiratory reserve volume. The reverse was case with the expiratory reserve volume. Therefore, the vital capacity, which is the sum of the tidal volume, inspiratory reserve volume and expiratory reserve volume, did not manifest a definite tendency. The minute volume, oxygen consumption, tidal volume and expiratory reserve volume were higher, and the inspiratory reserve volume was lower, in dordal decubitus that in sitting position. 2. Changes in respiratory capacity of each lung and the (middle) lower lobe due to variation in posture were nearly the same in patients with a lesion confined to the upper lung field of one lung as in normal persons. 3. In normal persons, diaphragmatic movement was more active on both sides in all other positions than in dorsal decubitus. In lateral decubitus, the increase in the movement of the lower side was more matked than that of the upper side. Nearly the same observation was made in patients with pulomnary tuberculosis.
- 千葉大学の論文