Abstract
For treatment of severe neonatal meconium aspiration syndrome (MAS), lung-protective mechanical ventilation is essential. This study compared short-term effects of small-volume conventional mechanical ventilation and high-frequency oscillatory ventilation on lung function in experimentally-induced MAS. In conventionally-ventilated rabbits, MAS was induced by intratracheal instillation of meconium suspension (4 ml/kg, 25 mg/ml). Then, animals were ventilated conventionally with small-volume (f-50/min; VT-6 ml/kg) or with high frequency ventilation (f-10/s) for 4 h, with the evaluation of blood gases, ventilatory pressures, and pulmonary shunts. After sacrifice, left lung was saline-lavaged and cells in bronchoalveolar lavage fluid (BALF) were determined. Right lung was used for the estimation of lung edema formation (wet/dry weight ratio). Thiobarbituric acid-reactive substances (TBARS), oxidative damage markers, were detected in lung tissue and plasma. Meconium instillation worsened gas exchange, and induced inflammation and lung edema. Within 4 h of ventilation, high frequency ventilation improved arterial pH and CO2 elimination compared with conventional ventilation. However, no other significant differences in oxygenation, ventilatory pressures, shunts, BALF cell counts, TBARS concentrations, or edema formation were observed between the two kinds of ventilation. We conclude that high frequency ventilation has only a slight advantage over small-volume conventional ventilation in the model of meconium aspiration syndrome in that it improves CO2 elimination.
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Acknowledgements
Authors thank D. Kuliskova, Z. Remisova, M. Petraskova, and M. Hutko for technical assistance. In addition, we would like to thank for support to projects APVV-0435-11, VEGA 1/0305/14, and BioMed (ITMS 26220220187).
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The authors declare no conflict of interest in relation to this article.
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Mikusiakova, L.T., Pistekova, H., Kosutova, P., Mikolka, P., Calkovska, A., Mokra, D. (2015). Effects on Lung Function of Small-Volume Conventional Ventilation and High-Frequency Oscillatory Ventilation in a Model of Meconium Aspiration Syndrome. In: Pokorski, M. (eds) Noncommunicable Diseases. Advances in Experimental Medicine and Biology(), vol 866. Springer, Cham. https://doi.org/10.1007/5584_2015_138
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DOI: https://doi.org/10.1007/5584_2015_138
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