Increased Extravascular Lung Water in Asymptomatic Open-water Swimmers

Four chest regions for both lungs are scanned by lung ultrasound; a positive region defined by the presence of three or more B-line artifacts. Bilateral or unilateral presence of two or more positive regions define positive interstitial syndrome.

Peripheral oxygen saturation measured by non-invasive pulse oxymetry

Clinical auscultation of lungs

Body temperature measured by ear thermometer.