[The effectiveness of intratracheal antibiotic administration. Clinical, microbiologic and pharmacologic results].

In 199 artificially ventilated patients of an internal intensive care unit clinical, bacteriological and pharmacological effects of endotracheally administered gentamicin were investigated. The dose schedule was 2-4 x 40 mg gentamicin/day. The incidence of secondary achieved pneumonia was reduced from 70% to 18%. The endotracheal colonization of pathogenic microorganisms reached 29.6% concerning bacterial microorganisms and 61% concerning fungi, 51.8% of all specimen were sterile. During 4 years of investigation there were found 19 secondary resistances of different bacteria, 12 persisted. Serum concentrations of gentamicin under endotracheal administration of 40 mg in 6-h-intervals didn't reach therapeutic values. In case of renal disorder the dose interval should be prolonged to twelve hours.