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  • Title: Anti-Pseudomonas activity in bronchial secretions of patients receiving amikacin or tobramycin as a continuous infusion.
    Author: Mombelli G, Coppens L, Thys JP, Klastersky J.
    Journal: Antimicrob Agents Chemother; 1981 Jan; 19(1):72-5. PubMed ID: 7247362.
    Abstract:
    The penetration of amikacin and tobramycin into bronchial secretions and the resulting anti-Pseudomonas activity were assessed in two groups of tracheostomized or intubated patients with tracheobronchial infection and purulent bronchial secretions. The aminoglycosides were administered as continuous, high-dose intravenous infusions. The mean drug concentrations in serum and bronchial secretions were 12.8 and 2.0 microgram/ml for amikacin and 3.6 and 0.7 microgram/ml for tobramycin. The bronchial secretion/serum ratios varied over a wide range: from 9.6 to 22.8% (average, 14.9%) for amikacin and from 3 to 39.3% (average, 17.5%) for tobramycin. Sustained anti-Pseudomonas activities in bronchial secretions were achieved only in patients with very high aminoglycoside levels in serum. In most patients, however, no anti-Pseudomonas activity could be detected within bronchial secretions despite therapeutic levels of amikacin and tobramycin and adequate bactericidal activities in serum.
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