[The rheopneumography (author's transl)].

The rheograph electrodes, placed in three symetrical leads on the axilla lines, permit recordings to be made of respiratory curves and, during respiratory apnea, of arterial pulmonary curves. The curves were recorded on 296 subjects who were either normal or attacked by lung or pleura diseases. In pathological cases, the respiratory enlargement can be validly reduced; an arterial pulmonary curve can be flattened and show abnormalities that attest to arterial compression (more particularly in cases of lung cancer or pleurisy), to the superposition of a cardiac or systemic arterial curve. An arterial curve can be replaced by a cardiac curve in cases of back-flow or attraction by the heart, an absence of parenchyma between the heart and the paries of the thorax. Information given by this method can be compared but not super imposed with those given by isotopic scanning.