Document Detail


Evaluation of lung function changes before and after surfactant application during artificial ventilation in newborn rats with congenital diaphragmatic hernia.
MedLine Citation:
PMID:  8078029     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Patients with congenital diaphragmatic hernia (CDH) have unilateral or bilateral hypoplasia of the lungs including delayed maturation of the terminal air sacs. Because these lungs are highly susceptible to barotrauma and oxygen toxicity, even in full-term newborns, continued research into optimal ventilatory regimen is essential to improve survival rate and to prevent ongoing lung damage. Against this background, the effect of exogenous surfactant application is evaluated. In newborn rats, CDH was induced after a single dose of 2,4 dichloro-4'-nitrophenyl (Nitrofen) (400 mg/kg) on day 10 of gestation. The newborn rats were intubated immediately after hysterotomy, transferred to a heated multichambered body plethysmograph, and artificially ventilated. Inspiratory peak pressures were initially set at 17 cm H2O, with positive end-expiratory pressure at 0 cm H2O and FIO2 at 1.0. The pressure was raised in steps of 5 cm H2O, from 5 to 30 cm H2O, to obtain pressure-volume diagrams at 0, 1, and 6 hours of artificial ventilation. These measurements were obtained in controls and in CDH rats with and without endotracheal installation of bovine surfactant (n = 4 to 10 in each group). Significant differences in lung volume between CDH and control rats were observed at all time-points. Surfactant application had a positive effect on lung volume, especially in control rats at t = 1 hour. No significant differences were observed between the CDH groups at t = 1 or t = 6 hours. In this animal model, the effect of artificial ventilation as well as the beneficial short-term effect of exogenous surfactant application have been evaluated. A continued positive effect on lung volume in CDH lungs could not be determined. Routine administration of exogenous surfactant in human CDH patients is not supported by these experimental results.
Authors:
E C Scheffers; H IJsselstijn; R Tenbrinck; B Lachmann; J C de Jongste; J C Molenaar; D Tibboel
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of pediatric surgery     Volume:  29     ISSN:  0022-3468     ISO Abbreviation:  J. Pediatr. Surg.     Publication Date:  1994 Jun 
Date Detail:
Created Date:  1994-10-06     Completed Date:  1994-10-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0052631     Medline TA:  J Pediatr Surg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  820-4     Citation Subset:  IM    
Affiliation:
Department of Paediatric Surgery, Sophia Children's Hospital, Rotterdam, The Netherlands.
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MeSH Terms
Descriptor/Qualifier:
Animals
Animals, Newborn
Fetal Organ Maturity / drug effects
Hernia, Diaphragmatic / congenital*,  physiopathology*,  therapy
Lung / abnormalities,  embryology
Pulmonary Surfactants / administration & dosage*
Rats
Rats, Sprague-Dawley
Respiration, Artificial*
Respiratory Mechanics*
Chemical
Reg. No./Substance:
0/Pulmonary Surfactants

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


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