Abstract
In order to study pulmonary function of the infant with pulmonary tuberculosis 128 cases for gas phase, 70 cases for blood phase and 10 cases of healthy children were investigated.
Results
1) Vital capacity / Total capacity, Expiratory reserve volume / Total capacity decreased according to the extent of lesion.
2) Residual volume / Total capacity and intrapulmonary gas mixing index increased according to the extent of lesion.
3) Vital capacity % pred., Maximal breathing capacity % pred. was small in advanced cases.
4) Air velocity index was slightly large in extensive lesions.
5) No correlation was found between the hematocrit or pH or extent of lesion.
6) Arterial O2 saturation and partial pressure decreased in advanced cases.
7) No definite correlation was found between arterial CO2 partial pressure or whole blood buffer base and the extent of the lesion.
8) RV/TC correlated with VC%, MBC%, AVI, N2%, SO2, PO2, (BB+)b; no correlation was found between RV/TC and Vc or pH.
9) Several cases of the influence of pulmonary tuberculosis on the development of pulmonary function in childhood were discussed.
