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
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Photo size: 18.0 Mpixels (51.6 MB uncompressed) - 5200x3466 pixels (17.3x11.5 in / 44.0x29.3 cm at 300 ppi)