CALCULATION OF THE RATIO OF THE CAPACITIES OF THE TWO LUNGS BASED ON CHEST-POLISOGRAPHY USING A GRID

Abstract

An examination of the function of each lung is necessary for deciding the surgical treatment of pulmonary tuberculosis. The examination, however, requires expensive and special bronchospirometry and often is impossible to apply. Various methods of examination have been reported, most of which are very complicated and worth little. Therefore, the author, aiming at a simplification of the examination, devised a grid with lattices one centi-meter intervals ; using this grid, he studied various methods of chest-polisography in deep inspiration and deep expiration. From these roentgenograms, he could easily calculate the ratio of the capacities of the two lungs. The methods of polisography and calculation are described in this paper.