Document Detail

Oximetry fails to predict acute mountain sickness or summit success during a rapid ascent to 5640 meters.
MedLine Citation:
PMID:  22656656     Owner:  NLM     Status:  In-Data-Review    
OBJECTIVE: The purpose of this study was to determine whether arterial oxygen saturation (Spo(2)) and heart rate (HR), as measured by a finger pulse oximeter on rapid arrival to 4260 m, could be predictive of acute mountain sickness (AMS) or summit success on a climb to 5640 m.
METHODS: Climbers (35.0 ± 10.1 years; 51 men, 5 women) were transported from 2650 m to the Piedra Grande hut at 4260 m on Pico de Orizaba within 2 hours. After a median time of 10 hours at the hut, they climbed toward the summit (5640 m) and returned, with a median trip time of 14 hours. The Lake Louise Self-Assessment Scale (LLSS) for AMS, HR, and Spo(2) were collected on arrival at the hut and repeated immediately before and after the climbers' summit attempts.
RESULTS: Average Spo(2) for all participants at 4260 m before their departure for the summit was 84.4% ± 3.7%. Thirty-seven of the 56 participants reached the summit, and 59% of all climbers met the criteria for AMS during the ascent. The Spo(2) was not significantly different between those who experienced AMS and those who did not (P = .82); neither was there a difference in Spo(2) between summiteers and nonsummiteers (P = .44). Climbers' HR just before the summit attempt was not related to AMS but was significantly lower for summiteers vs nonsummiteers (P = .04).
CONCLUSIONS: The Spo(2) does not appear to be predictive of AMS or summit success during rapid ascents.
Dale R Wagner; Jonathan R Knott; Jack P Fry
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Wilderness & environmental medicine     Volume:  23     ISSN:  1545-1534     ISO Abbreviation:  Wilderness Environ Med     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-06-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9505185     Medline TA:  Wilderness Environ Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  114-21     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Wilderness Medical Society. Published by Elsevier Inc. All rights reserved.
Human Movement Science Program, HPER Department, Utah State University, Logan, UT.
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