| Spirometry and Broncho-spirometry in Lateral Decubitus Position |
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Pyoung Ki Kim |
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Department of Chest Medicine, National Medical Center, Seoul, Korea |
| 측와위에 있어서의 Spirometry 및 Bronchospirometry |
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| Abstract |
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Spirometry and broncho-spirometry were performed on 49 cases of chest diseases for pre-operative examination. Among which 40 were pulmonary tuberculosis, 5 were unspecific broncho-pulmonary infection and 4 had empyema. Most of the cases(45 out of 49) had the illness more than 1 year of duration. Timed vital capacity decreased in 1 second value in considerable number of cases but 3 second value was in normal limit in majority cases. However, only about 20% of the cases decreased in their V.C. and M.B.C. significantly, and all of them belonged to the group of long standing illness. Inspite of decrease of those V.C. and M.B.C., there were only two cases who showed Air Velocity Index below 0.8. Decrease in V.C. from sitting to supine was not so significant but was significant from spirometry to broncho-spirometry.(13.7% decrease in average) Vital capacity was slightly decreased in lateral decubitus position than in supine position. Vital capacity was bigger in left lateral decubitus position or with the main lesion downward M.V. in broncho-spirometry was decreased 26% in average compare to spirometry. The side with bigger V.C. had bigger O2 consumption but the O2 consumption was not corresponding to the value of M.V. as it is with V.C. Oxygen consumption has decreased (20%) in broncho-spirometry than in spirometry. The elevation of baseline was bigger in case the side of bigger V.C. and bigger O2 consumption was placed in the upper position. When the baseline elevation was same, the V.C. was bigger in case the main lesion was underlying. Inspiratory reserve volume was bigger apparently in spirometry when better functioning lung was underlying, and it was more prominent in broncho-spirometry. Expiratory reserve volume was markedly bigger in upper lying lung, especially when it is better functioning side. Elevation of baseline was applied not only for checking the position of tube but was also useful in estimation of the unilateral function together with diaparam movement and x-ray findings. |
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