Document Detail


Bench evaluation of flow limitation detection by automated continuous positive airway pressure devices.
MedLine Citation:
PMID:  16899831     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
STUDY OBJECTIVE: Automatic continuous positive airway pressure (CPAP) devices that adjust the pressure delivered to the patient are now available to treat sleep-disordered breathing. Sophisticated auto-CPAP devices can detect and correct flattened inspiratory flow contours (FIFCs) associated with subtle upper airway obstruction. However, evaluations of their performance are made difficult by differences across patients and devices. We performed a bench study of five commercially available auto-CPAP devices using a breath waveform simulator to evaluate sensitivity for detecting flattened inspiratory flow. DESIGN: Five degrees of FIFC were simulated. In addition, normal and abnormal flow contours from patients published in the literature were evaluated. MEASUREMENTS AND RESULTS: One device showed autotriggering leading to CPAP increases, and another device varied the CPAP level independently from the presence of an FIFC. The three remaining devices differed regarding the detection of FIFCs and the means used to increase CPAP. CONCLUSION: Based on the characteristics of each patient, physicians must choose among devices with different thresholds of FIFC detection and different pressure responses to detection. Therefore, physicians need details on the algorithms used in auto-CPAP devices. Manufacturers should supply detailed algorithms.
Authors:
Frédéric Lofaso; Gilbert Desmarais; Karl Leroux; Vincent Zalc; Redouane Fodil; Daniel Isabey; Bruno Louis
Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Chest     Volume:  130     ISSN:  0012-3692     ISO Abbreviation:  Chest     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-08-10     Completed Date:  2006-09-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0231335     Medline TA:  Chest     Country:  United States    
Other Details:
Languages:  eng     Pagination:  343-9     Citation Subset:  AIM; IM    
Affiliation:
National Institute for Health and Medical Research (Institut National de la Santé et de la Recherche Médicale), Unit 651, Henri Mondor Teaching Hospital, Créteil, France. f.lofaso@rpc.ap-hop-paris.fr
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MeSH Terms
Descriptor/Qualifier:
Continuous Positive Airway Pressure / instrumentation*,  standards
Equipment Design
Humans
Reference Standards
Signal Processing, Computer-Assisted / instrumentation*
Sleep Apnea Syndromes / therapy
Comments/Corrections
Comment In:
Chest. 2006 Aug;130(2):312-4   [PMID:  16899825 ]

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


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