Document Detail


Acute severe asthma: performance of ventilator at simulated altitude.
MedLine Citation:
PMID:  20679899     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
OBJECTIVE: Exacerbation of asthma can be seen during air transport. Severe patients, not responding to conventional therapy, require ventilator support. We evaluated the performance of two transport ventilators, built with turbine technology, the T-birdVSO2 and the LTV-1000, for use during aeromedical evacuation of acute severe asthma. We have assessed the ability of both the ventilators to deliver to an acute severe asthma model a tidal volume (Vt) set at different simulated altitudes, by changing the ambient air pressure.
METHODS: The simulated cabin altitudes were 1500, 2500, and 3000 m (decompression chamber). Vt was set at 700 and 400 ml in an acute severe asthma lung model. Comparisons of the preset with the actual measured values were accomplished using a t-test.
RESULTS: Comparisons between the actual delivered Vt and set Vt showed a significant difference starting at 1500 m for both the ventilators. The T-birdVSO2 showed a decrease in the volume delivered, with a negative variation of more than 10% compared with the Vt set. The LTV-1000 showed mostly an increase in the volume delivered. The delivered Vt remained within 10% of the set Vt.
CONCLUSION: The accuracy of Vt delivery was superior with the LTV-1000 than with the T-birdVSO2, but the higher delivered Vt of the LTV-1000 are likely to be more harmful than lower delivered Vt of the T-birdVSO2.
Authors:
Jean-Pierre Tourtier; Emma Forsans; Thomas Leclerc; Nicolas Libert; Solange Ramsang; Karim Tazarourte; Michel Man; Marc Borne
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European journal of emergency medicine : official journal of the European Society for Emergency Medicine     Volume:  18     ISSN:  1473-5695     ISO Abbreviation:  Eur J Emerg Med     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-03-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9442482     Medline TA:  Eur J Emerg Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  77-80     Citation Subset:  IM    
Affiliation:
aDepartment of Anesthesia and Intensive Care, Military Hospital Val-de-Grace, Paris bSAMU, Hospital Marc-Jacquet, Melun, France.
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