Document Detail


Disparity between tidal and static volumes of immature lungs treated with reconstituted surfactants.
MedLine Citation:
PMID:  8847333     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We biologically assessed functions of several reconstituted surfactants with the same minimum surface tension (2-3 mN/m) as "complete" porcine pulmonary surfactant (natural surfactant) but with longer surface adsorption times. Administration of natural surfactant (adsorption time 0.29 s) into the lungs of surfactant-deficient immature rabbits brought a tidal volume of 16.1 +/- 4.4 (SD) ml/kg during mechanical ventilation with 40 breaths/min and 20 cmH2O insufflation pressure. In static pressure-volume recordings, these animals showed a lung volume of 62.4 +/- 9.7 ml/kg at 30 cmH2O airway pressure and maintained 55% of this volume when the pressure decreased to 5 cmH2O. With two reconstituted surfactants consisting of synthetic lipids or isolated lipids from porcine lungs plus surfactant-associated hydrophobic proteins (adsorption times 0.57 and 0.78 s, respectively), tidal volumes were < 38% of that with natural surfactant (P < 0.05), but static pressure-volume recordings were not different. Care is therefore needed in estimating the in vivo function of surfactant preparations from minimum surface tension or static pressure-volume measurements.
Authors:
T Kobayashi; W Z Li; K Tashiro; R Takahashi; Y Waseda; K Yamamoto; Y Suzuki
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  80     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1996 Jan 
Date Detail:
Created Date:  1996-10-24     Completed Date:  1996-10-24     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  62-8     Citation Subset:  IM    
Affiliation:
Department of Anesthesiology and Intensive Care Medicine, School of Medicine, Kanazawa University, Japan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Animals, Newborn
Body Weight / drug effects,  physiology
Lipid Metabolism
Lung / drug effects*,  growth & development
Lung Volume Measurements*
Organ Size / drug effects
Pulmonary Surfactants / pharmacology*
Surface Tension
Swine
Therapeutic Irrigation
Tidal Volume*
Chemical
Reg. No./Substance:
0/Pulmonary Surfactants

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


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