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Effective gas exchange in paralyzed juvenile rabbits using simple, inexpensive respiratory support devices.
MedLine Citation:
PMID:  20814347     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We have developed two devices: a high-amplitude bubble continuous positive airway pressure (HAB-CPAP) and an inexpensive bubble intermittent mandatory ventilator (B-IMV) to test the hypotheses that simple, inexpensive devices can provide gas exchange similar to that of bubble CPAP (B-CPAP) and conventional mechanical ventilation (CMV). Twelve paralyzed juvenile rabbits were intubated, stabilized on CMV, and then switched to CPAP. On identical mean airway pressures (MAPs), animals were unable to maintain pulse oximeter oxygen saturation (SpO2) >80% on conventional B-CPAP, but all animals oxygenated well (97.3 ± 2.1%) on HAB-CPAP. In fact, arterial partial pressures of O2 (Pao2) were higher during HAB-CPAP than during CMV (p = 0.01). After repeated lung lavages, arterial partial pressures of CO2 (Paco2) were lower with B-IMV than with CMV (p < 0.0001), despite identical ventilator settings. In lavaged animals, when HAB-CPAP was compared with CMV at the same MAP and 100% O2, no differences were observed in Pao2, but Paco2 levels were higher with HAB-CPAP (70 ± 7 versus 50 ± 5 mm Hg; p < 0.05). Arterial blood pressures were not impaired by HAB-CPAP or B-IMV. The results confirm that simple inexpensive devices can provide respiratory support in the face of severe lung disease and could extend the use of respiratory support for preterm infants into severely resource-limited settings. ABBREVIATIONS::
Authors:
Robert M Diblasi; Jay C Zignego; Charles V Smith; Thomas N Hansen; C Peter Richardson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pediatric research     Volume:  68     ISSN:  1530-0447     ISO Abbreviation:  Pediatr. Res.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2011-07-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0100714     Medline TA:  Pediatr Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  526-30     Citation Subset:  IM    
Affiliation:
Center for Developmental Therapeutics, Seattle Children's Research Institute, Seattle, Washington; Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington, 98101.
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