Pneumonoconiosis presents a medicolegal problem of major importance. Many studies exist which deal with its etiology and pathogenesis and its diagnosis by roentgenograms, but so far little attention has been paid to its physiologic aspects, though their practical importance is obvious. Especially is this so in view of the growing tendency to adjust awards of workmen's compensation to the degree of disability. In order to do this properly it is essential that objective means of estimating disability be sought which will be fair alike to workman and employer. With this in mind we have carried out investigations on the respiratory function of fifty-three cases of pulmonary fibrosis of various types, not all of which were pneumonoconioses.
The function of respiration is one jointly mediated by the heart, the blood and the lungs. It was apparent at the outset that the functional examination should be complete as regards all three of
WILLIAM S. McCANN, ALBERTO HURTADO, NOLAN KALTREIDER, WALTER W. FRAY. THE ESTIMATION OF FUNCTIONAL DISABILITY IN THE PULMONARY FIBROSES. JAMA. 1934;103(11):810–815. doi:10.1001/jama.1934.02750370014004