This monograph, written in Danish with an English summary, presents studies in preoperative and postoperative lung volumes and composition of alveolar air on patients with pulmonary tuberculosis subjected to thoracoplasty. The first of three chapters deals with the effect of thoracoplasty on lung volume in 51 subjects. Vital capacity was determined spirometrically and compared with results derived from West's formula. Residual air was determined by the hydrogen dilution method. Patients with tuberculosis usually had lowered total capacities and often relatively high residual fractions preoperatively. Postoperatively, the vital capacity was further reduced, but in 24 per cent the residual air was increased. He found patients to be dyspneic on exertion if vital capacity was less than half of the calculated normal amount. Incidentally, the use of roentgenologic planimetry in estimation of lung volume was found unreliable because of wide individual variation.
The second chapter gives the extremely variable results of testing