AimsIt is unknown whether subclinical high-altitude pulmonary oedema reduces spontaneously after prolonged altitude exposure. Continuous positive airway pressure (CPAP) removes extravascular lung fluids and improves haemoglobin oxygen saturation in acute cardiogenic oedema. We evaluated the presence of pulmonary extravascular fluid increase by assessing CPAP effects on haemoglobin oxygen saturation under acute and prolonged altitude exposure.Methods and resultsWe applied 7 cm H2O CPAP for 30 min to healthy individuals after acute (Capanna Margherita, CM, 4559 m, 2 days permanence, and 2-sat increase suggesting a reduction in alveolar fluids.
- Arterial blood oxygen saturation
- High altitude pulmonary oedema
- Hypobaric hypoxia at altitude
- Positive pressure ventilation
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine