Document Detail


Simulated shuttle egress: comparison of two Space Shuttle protective garments.
MedLine Citation:
PMID:  11211038     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: In a previous study from our laboratory, we observed carbon dioxide (CO2) accumulation in the helmet of the NASA Launch and Entry Suit (LES) during a simulated emergency egress from the Space Shuttle. Of 12 subjects, 8 were unable to complete the egress simulation with a G-suit inflation pressure of 1.5 psi. The purpose of this report was to compare CO2 accumulation and egress walking time in the new Advanced Crew Escape Suit (ACES) with that in the LES. METHODS: Four male subjects who previously were unable to complete the egress in the LES performed a simulated egress while wearing the ACES with the G-suit inflated to 1.5 psi. The egress simulation consisted of 6 min of seated rest, 2 min of standing, and 5 min of walking on a treadmill at 1.56 m x s(-1) (3.5 mph) and 0% grade. The helmet visor was closed with the subjects receiving 100% oxygen throughout the simulation. Inspired CO2 and walking time were measured. RESULTS: The rate of CO2 accumulation was significantly less (ACES: 0.53 +/- 0.03, LES: 1.07 +/- 0.15 %CO2 x min(-1); p = 0.05) and walk time was greater in the ACES (ACES: 5.0 +/- 0.0, LES: 2.7 +/- 0.2 min; p = 0.002). CONCLUSIONS: Changes in the design of the ACES from the LES resulted in a decreased rate of CO2 accumulation and an improved egress walking time compared with the LES.
Authors:
S M Lee; P A Bishop; S M Schneider; M C Greenisen
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Aviation, space, and environmental medicine     Volume:  72     ISSN:  0095-6562     ISO Abbreviation:  Aviat Space Environ Med     Publication Date:  2001 Feb 
Date Detail:
Created Date:  2001-02-08     Completed Date:  2001-04-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7501714     Medline TA:  Aviat Space Environ Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  110-4     Citation Subset:  IM; S    
Affiliation:
Wyle Laboratories, Life Sciences Systems and Services Division, Houston, TX, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Carbon Monoxide / analysis*
Equipment Design
Equipment Failure
Gravity Suits*
Humans
Hypergravity
Male
Space Flight*
Task Performance and Analysis
Chemical
Reg. No./Substance:
630-08-0/Carbon Monoxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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