Document Detail


Calibration of seven ICU ventilators for mechanical ventilation with helium-oxygen mixtures.
MedLine Citation:
PMID:  10390375     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The study evaluated seven intensive care unit (ICU) ventilators (Veolar FT, Galileo, Evita 2, Evita 4, Servo 900C, Servo 300, Nellcor Puritan Bennett 7200 Series) with helium-oxygen (HeO2), using a lung model, to develop correction factors for the safe use of HeO2. A 70:28 helium-O2 mixture (heliox) replaced air and combined with O2 (HeO2). Theoretical impact of HeO2 on inspiratory valves and gas mixing was computed. True fraction of inspired oxygen (FIO2del) was compared with fraction of inspired oxygen (FIO2) set on the ventilator (FIO2set). True tidal volume (VTdel) was compared with VT set on the ventilator (VTset) in volume control and with control VTdel at FIO2 1.0 in pressure control. FIO2del minimally exceeded FIO2set (</= 5%) except with the 7200 Series (FIO2del > FIO2set by 125%). In volume control, with the Veolar FT, Galileo, Evita 2, and Servo 900C, VTdel > VTset, with the 7200 Series VTdel < VTset (linear relationship, magnitude of discrepancy inversely related to FIO2set). With the Evita 4, VTdel > VTset (nonlinear relationship), whereas with the Servo 300 VTdel = VTset. In pressure control, VTdel was identical to control measurements, except with the 7200 Series (ventilator malfunction). Correction factors were developed that can be applied to most ventilators.
Authors:
D Tassaux; P Jolliet; J M Thouret; J Roeseler; R Dorne; J C Chevrolet
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of respiratory and critical care medicine     Volume:  160     ISSN:  1073-449X     ISO Abbreviation:  Am. J. Respir. Crit. Care Med.     Publication Date:  1999 Jul 
Date Detail:
Created Date:  1999-08-11     Completed Date:  1999-08-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9421642     Medline TA:  Am J Respir Crit Care Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  22-32     Citation Subset:  AIM; IM    
Affiliation:
Medical Intensive Care Division, University Hospital, Geneva, Switzerland.
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MeSH Terms
Descriptor/Qualifier:
Calibration
Equipment Design
Equipment Failure Analysis
Equipment Safety
Helium*
Humans
Intensive Care Units*
Oxygen*
Positive-Pressure Respiration
Tidal Volume
Ventilators, Mechanical*
Chemical
Reg. No./Substance:
7440-59-7/Helium; 7782-44-7/Oxygen

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


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