BREATHING, SPIROMETRY ELDERLY P. BREATHING, SPIROMETRY ELDERLY P. Photo essay at La Louvière clinic, France. Pneumology department. Pulmonary function test. Study and measurement of the pulmonary volume of the patients. Installed in a cabin, the patient must blow in a duct that permits to measure his respiratory output (spirometry). Different phases go with this examination : open cabin to measure the diffusion of carbon monoxide allowing to control the pulmonary membrane or closed cabin i