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  • Title: Effects of tracheal instillation of natural surfactant in premature lambs. I. Clinical and autopsy findings.
    Author: Adams FH, Towers B, Osher AB, Ikegami M, Fujiwara T, Nozaki M.
    Journal: Pediatr Res; 1978 Aug; 12(8):841-8. PubMed ID: 581094.
    Abstract:
    Ten pairs of twin lambs 118--122 days of gestation were given either natural surfactant or diluent endotracheally before the first breath. By using the premature twin lamb model, we have been able to show that instillation of natural surfactant produced 100% survival for the duration of the study period (2 hr); stable blood gases on room air; lungs that became increasingly compliant while on the respirator; generally well aerated lungs at autopsy; good lung pressure-volume relationships; normal lung surface tension measurements; and histologic evidence of good alveolar expansion with large amounts of free intraluminal phospholipid, no epithelial damage, and no hyaline membranes. It is concluded that tracheal instillation of natural surfactant into the premature lamb protects the lungs from developing many features characteristic of the respiratory distress syndrome.
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