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Poster Walks: Poster Walk 3: Sleep/Breathing |

P157 Effect of repeated altitude exposure on nocturnal breathing disturbances in lowlanders.

M. Furian; S.E. Hartmann; L. Muralt; M. Lichtblau; P.R. Bader; J.M. Rawling; S. Ulrich; M.J. Poulin; K.E. Bloch
Author and Funding Information

1Pulmonary Division and Sleep Disorders Center, University Hospital Zurich, Zurich, Switzerland

2University of Calgary

3Dept of Family Medicine, University of Calgary, Calgary, Canada


Copyright 2017, American College of Chest Physicians and Swiss Respiratory Society SGP. All Rights Reserved.


Chest. 2017;151(5_S):A55. doi:10.1016/j.chest.2017.04.059
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Objective: To evaluate the effect of acute exposure, acclimatization and re-exposure to very high altitude on nocturnal breathing and subjective sleep quality in lowlanders.

Methods: 21 healthy lowlanders, aged 18-30y, underwent two 6-day sojourns at the ALMA observatory, Chile (6hrs/day spent at 5050m, nights at 2900m), separated by a 1-week recovery period at 520m. Subjective sleep quality (SSQ, visual analog scale 0-100 with increasing quality) and respiratory sleep studies were assessed at 520m before ascent (LA1) and in the recovery period (LA2), and at 2900m during the first and second sojourn, on days 1 and 6 (sojourn 1: 1-HA1 and 1-HA6; sojourn 2: 2-HA1 and 2-HA6). www.ClinicalTrials.gov NCT02730143

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