AMELIE-BENOIST / BSIP / SCIENCE PHOTO LIBRARY AMELIE-BENOIST / BSIP / SCIENCE PHOTO LIBRARY
Reportage at CENAS, a Swiss sleep centre. A patient undergoes a polysomnography wearing a continuous positive airway pressure mask for sleep apnoea. Polysomnography is a test that records a complete night's sleep. The test involves monitoring various physiological variables in order to quantify and qualify sleep disorders.
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