| Pulmonary distribution of lucinactant and poractant alfa and their peridosing hemodynamic effects in a preterm lamb model of respiratory distress syndrome. | |
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MedLine Citation:
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PMID: 20531255 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Tracheal instillation of surfactant to premature newborns improves their survivability but may transiently obstruct airways resulting in undesirable acute effects on cerebral blood flow (CBF) and oxygenation. The acute peridosing hemodynamic effects of surfactant administration may be avoided by minimizing the volume of surfactant administered, but smaller surfactant volumes may also result in less even distribution of surfactant throughout the lung. These experiments were undertaken to compare responses to two surfactants with different dose volumes (porcine-derived poractant alfa, 2.5 mL/kg vs peptide-based synthetic lucinactant, 5.8 mL/kg) given to newly delivered lambs at 85% gestation. Both surfactants resulted in similar improvements in blood gas values, a doubling of dynamic compliance, increases in brain tissue oxygen tension, and stable blood pressure with no significant change in CBF. Distribution of surfactant throughout the lungs was more uniform with lucinactant than poractant alfa when assessed by labeled microspheres. We conclude that improvements in lung mechanics, gas exchange, and changes in CBF are comparable for a porcine-derived and peptide-containing synthetic surfactant, despite instilled volumes differing by 2-fold. Intrapulmonary distribution of surfactant is more uniform after a larger volume is instilled. |
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Authors:
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Michael H Terry; T A Merritt; Benjamin Harding; Hobe Schroeder; Jeanette Merrill-Henry; Jan Mazela; Timothy J Gregory; Robert Segal; Gordon G Power; Arlin B Blood |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Pediatric research Volume: 68 ISSN: 1530-0447 ISO Abbreviation: Pediatr. Res. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-08-13 Completed Date: 2010-11-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0100714 Medline TA: Pediatr Res Country: United States |
Other Details:
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Languages: eng Pagination: 193-8 Citation Subset: IM |
Affiliation:
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Department of Respiratory Care, Center for Perinatal Biology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Animals Biological Products / pharmacology*, therapeutic use Blood Gas Analysis Blood Pressure / drug effects Brain / metabolism Disease Models, Animal* Dose-Response Relationship, Drug Drug Combinations Fatty Alcohols / pharmacology*, therapeutic use Humans Infant, Newborn Lung / drug effects, physiology Microspheres Oxygen / metabolism Phosphatidylglycerols / pharmacology*, therapeutic use Phospholipids / pharmacology*, therapeutic use Proteins / pharmacology*, therapeutic use Pulmonary Surfactants / pharmacology*, therapeutic use Respiratory Distress Syndrome, Newborn / drug therapy, metabolism* Sheep |
| Chemical | |
Reg. No./Substance:
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0/Biological Products; 0/Drug Combinations; 0/Fatty Alcohols; 0/Phosphatidylglycerols; 0/Phospholipids; 0/Proteins; 0/Pulmonary Surfactants; 0/lucinactant; 129069-19-8/poractant alfa; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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