Spirometer test for asthma
Asthmatic man breathes heavily into a spirometer, which measures the total air exhaled, under supervision of a doctor. The test is alternatively called a lung function test.
Copyright © James King-Holmes
Model Release: Yes
Photo size: 17.5 Mpixels (50 MB uncompressed) - 5130x3408 pixels (17.1x11.3 in / 43.4x28.9 cm at 300 ppi)