Pulmonary Edema Clinical Trial
Official title:
Interstitial Pulmonary Edema After Rapid Ascent to High Altitude (Margherita Hut, 4559 m)
Based on the findings of decreased vital capacity, decreased FEV1 and increased closing volume after ascent to high altitude, some investigators suggest the presence of a subclinical high altitude pulmonary edema (HAPE). Since these parameters are only indirect measures of pulmonary interstitial fluid accumulation, the aim of this study is to examine the effects of broncho-constriction on the increase of closing volume by extensive lung function testing in healthy mountaineers at low altitude and on the Margherita Hut (4559 m). As has been done in earlier studies, conventional thorax radiographs are used for verification of HAPE. In this study, the determination of the thoracic fluid quantity will be completed by measurements of thoracic impedance. In addition markers of pulmonary endothelial function will be assessed to get further insight into the regulation of pulmonary vascular tone at altitude and in particular into the pathophysiology of HAPE.
n/a
Intervention Model: Single Group Assignment, Masking: Open Label
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