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Effects of Perfluorochemicals for Intrapulmonary Vancomycin Administration and Partial Liquid Ventilation in an Animal Model of Meconium-Injured Lungs

以胎便吸入性肺損傷之動物模式探討使用氟碳化合物來進行肺內給藥(萬古黴素)與部份液體通氣術之效果

摘要


Background: Acute lung injury, such as meconium aspiration syndrome in neonates, may present with exacerbated ventilation and perfusion abnormalities. This can impair the efficacy of intravenous antibiotic therapy in treating pulmonary infection. Intrapulmonary administration via perfluorochemical as a vehicle may adequately deliver drugs, such as the poorly pulmonary-penetrative antibiotic vancomycin, to affect lung regions while maintaining gas exchange and non-toxic serum level. Methods: Twelve newborn piglets were injured with intra-tracheally installed human meconium, and randomly grouped into intravenous group (intravenous injection with vancomycin 15mg/kg, followed by conventional gas ventilation) or intrapulmonary group (intrapulmonary instilled with vancomycin 15mg/kg and perfluorochemical emulsion, followed by partial liquid ventilation). Blood samples were obtained to check vancomycin serum concentrations (0-240 mins). Lung tissues were tested for vancomycin contents. Results: Intrapulmonary group animals had signicantly lower vancomycin serum levels than the intravenous group, but vancomycin contents (198.9±72.5μg/g dry tissue) in lung tissues was significantly higher than in the intravenous group (134.9±39.1μg/g dry tissue) (p<0.05). Gas exchange and lung compliance in the intrapulmonary group were also significantly better than in the intravenous group. Conclusions: Ferjluorochemical is a good vehicle to deliver vancomycin and maintains gas exchange in severe meconium-injured lungs.

並列摘要


Background: Acute lung injury, such as meconium aspiration syndrome in neonates, may present with exacerbated ventilation and perfusion abnormalities. This can impair the efficacy of intravenous antibiotic therapy in treating pulmonary infection. Intrapulmonary administration via perfluorochemical as a vehicle may adequately deliver drugs, such as the poorly pulmonary-penetrative antibiotic vancomycin, to affect lung regions while maintaining gas exchange and non-toxic serum level. Methods: Twelve newborn piglets were injured with intra-tracheally installed human meconium, and randomly grouped into intravenous group (intravenous injection with vancomycin 15mg/kg, followed by conventional gas ventilation) or intrapulmonary group (intrapulmonary instilled with vancomycin 15mg/kg and perfluorochemical emulsion, followed by partial liquid ventilation). Blood samples were obtained to check vancomycin serum concentrations (0-240 mins). Lung tissues were tested for vancomycin contents. Results: Intrapulmonary group animals had signicantly lower vancomycin serum levels than the intravenous group, but vancomycin contents (198.9±72.5μg/g dry tissue) in lung tissues was significantly higher than in the intravenous group (134.9±39.1μg/g dry tissue) (p<0.05). Gas exchange and lung compliance in the intrapulmonary group were also significantly better than in the intravenous group. Conclusions: Ferjluorochemical is a good vehicle to deliver vancomycin and maintains gas exchange in severe meconium-injured lungs.

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