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  • Title: Influence of high frequency ventilation at different end-expiratory lung volumes on the development of lung damage during lung lavage in rabbits.
    Author: Baum M, Putz G, Mutz N, Putensen C, Klima G, Benzer H.
    Journal: Br J Anaesth; 1989; 63(7 Suppl 1):65S-70S. PubMed ID: 2611079.
    Abstract:
    The effects of high frequency ventilation in combination with sustained inflations was studied in the surfactant-deficient lungs of 18 New Zealand White rabbits (weight 1.9-2.1 kg) during anaesthesia with urethane and neuromuscular block with pancuronium. Lung damage was induced by repeated lung lavage. In nine rabbits (group I) baseline ventilator settings were maintained constant throughout the study and airway pressure was readjusted to achieve a constant tidal volume. In the other nine rabbits (group II), ventilation was reinstituted after lung lavage with one period of four sustained inflations followed immediately by high frequency ventilation. In group I there was a significant decrease in gas exchange for oxygen and deterioration in pulmonary mechanics, whereas in group II there was little change in baseline blood-gas values or pulmonary mechanics. These data suggest that, with adequate ventilatory management during the period of lung lavage, the lung damage produced by this manoeuvre may be obviated.
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