Document Detail


Changes in Lung Volume and Ventilation during Lung Recruitment in High-Frequency Ventilated Preterm Infants with Respiratory Distress Syndrome.
MedLine Citation:
PMID:  21414632     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVES: To assess global and regional changes in lung volume and ventilation during lung recruitment in preterm infants with respiratory distress syndrome. STUDY DESIGN: Using electrical impedance tomography, changes in lung volume and ventilation were measured in 15 high-frequency oscillatory ventilated preterm infants during oxygenation-guided recruitment maneuvers. The inflation and deflation limbs were mapped, and the lower and upper inflection points were calculated using both oxygenation and impedance data. The impedance data were also used to determine recruitment-related changes in oscillation volume and distribution. RESULTS: During inflation, lower and upper inflection points were identified in the majority of infants. The deflation limb showed clear lung hysteresis in all infants. The upper inflection point was significantly lower when comparing the pressure/oxygenation and pressure/impedance curves. Lung volume changes differed between the ventral and dorsal regions, but did not show a consistent pattern. Optimal recruitment increased the oscillation volume, but the distribution of ventilation was relatively homogeneous along the ventral-dorsal axis. CONCLUSIONS: Lung hysteresis is present in preterm infants with respiratory distress syndrome. Regional differences in lung volume changes and ventilation during high-frequency oscillatory ventilation with lung recruitment are relatively modest and do not follow a gravity-dependent distribution.
Authors:
Martijn Miedema; Frans H de Jongh; Inez Frerichs; Mariëtte B van Veenendaal; Anton H van Kaam
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-15
Journal Detail:
Title:  The Journal of pediatrics     Volume:  -     ISSN:  1097-6833     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375410     Medline TA:  J Pediatr     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Mosby, Inc. All rights reserved.
Affiliation:
Department of Neonatology, Emma Children's Hospital, Academic Medical Center, Amsterdam, The Netherlands.
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