Document Detail

Ventilator modes and settings during non-invasive ventilation: effects on respiratory events and implications for their identification.
MedLine Citation:
PMID:  20947891     Owner:  NLM     Status:  MEDLINE    
Compared with invasive ventilation, non-invasive ventilation (NIV) has two unique characteristics: the non-hermetic nature of the system and the fact that the ventilator-lung assembly cannot be considered as a single-compartment model because of the presence of variable resistance represented by the upper airway. When NIV is initiated, the ventilator settings are determined empirically based on a clinical evaluation and diurnal blood gas variations. However, NIV is predominantly applied during sleep. Consequently, to assess overnight patient-machine 'agreement' and efficacy of ventilation, more specific and sophisticated monitoring is needed. The effectiveness of NIV might therefore be more correctly assessed by sleep studies than by daytime assessment. The most available and simple monitoring can be done from flow and pressure curves from the mask or the ventilator circuit. Examination of these tracings can give useful information to evaluate if the settings chosen by the operator were the right ones for that patient. However, as NIV allows a large range of ventilatory parameters and settings, it is mandatory to have information about this to better understand patient-ventilator interaction. Ventilatory modality, mode of triggering, pressurisation slope, use or not of positive end expiratory pressure and type of exhalation as well as ventilator performances may all have physiological consequences. Leaks and upper airway resistance variations may, in turn, modify these patterns. This article discusses the equipment available for NIV, analyses the effect of different ventilator modes and settings and of exhalation and connecting circuits on ventilatory traces and gives the background necessary to understand their impact on nocturnal monitoring of NIV.
Claudio Rabec; Daniel Rodenstein; Patrick Leger; Sylvie Rouault; Christophe Perrin; Jésus Gonzalez-Bermejo;
Publication Detail:
Type:  Journal Article; Review     Date:  2010-10-14
Journal Detail:
Title:  Thorax     Volume:  66     ISSN:  1468-3296     ISO Abbreviation:  Thorax     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-01-24     Completed Date:  2011-03-02     Revised Date:  2014-01-27    
Medline Journal Info:
Nlm Unique ID:  0417353     Medline TA:  Thorax     Country:  England    
Other Details:
Languages:  eng     Pagination:  170-8     Citation Subset:  IM    
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MeSH Terms
Equipment Design
Monitoring, Physiologic / methods
Respiration, Artificial / methods*
Respiratory Insufficiency / therapy
Terminology as Topic
Ventilators, Mechanical*
Republished in:
Rev Mal Respir. 2013 Dec;30(10):818-31   [PMID:  24314706 ]

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

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