Transthoracic sonographic assessment of B-line scores during ascent to altitude among healthy trekkers.

Autor: Lim R; Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada. Electronic address: Rachel.lim@ahs.ca., Ma IWY; Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada., Brutsaert TD; Department of Exercise Science and Anthropology, Syracuse University, New York, USA., Nysten HE; Red Deer Hospital, Red Deer, Alberta, Canada., Nysten CN; Department of Biology, Faculty of Science and Technology, Mount Royal University, Calgary, Alberta, Canada., Sherpa MT; Kunde Hospital, Khunde, Solukhumbu, Nepal., Day TA; Department of Biology, Faculty of Science and Technology, Mount Royal University, Calgary, Alberta, Canada.
Jazyk: angličtina
Zdroj: Respiratory physiology & neurobiology [Respir Physiol Neurobiol] 2019 May; Vol. 263, pp. 14-19. Date of Electronic Publication: 2019 Feb 19.
DOI: 10.1016/j.resp.2019.02.005
Abstrakt: Sonographic B-lines can indicate pulmonary interstitial edema. We sought to determine the incidence of subclinical pulmonary edema measured by sonographic B-lines among lowland trekkers ascending to high altitude in the Nepal Himalaya. Twenty healthy trekkers underwent portable sonographic examinations and arterial blood draws during ascent to 5160 m over ten days. B-lines were identified in twelve participants and more frequent at 4240 m and 5160 m compared to lower altitudes (P < 0.03). There was a strong negative correlation between arterial oxygen saturation and the number of B-lines at 5160 m (ρ = -0.75, P = 0.008). Our study contributes to the growing body of literature demonstrating the development of asymptomatic pulmonary edema during ascent to high altitude. Portable lung sonography may have utility in fieldwork contexts such as trekking at altitude, but further research is needed in order to clarify its potential clinical applicability.
(Copyright © 2019 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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