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Efficacy and pharmacokinetics of tobramycin in patients with chronic urinary tract infections and various degrees of renal impairment

Wirksamkeit und Pharmakokinetik von Tobramycin bei Patienten mit chronischen Harnwegsinfektionen und unterschiedlichen Graden von Niereninsuffizienz

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Summary

The pharmacokinetics and efficacy of a new aminoglycoside, tobramycin, was investigated in the treatment of patients with chronic urinary tract infections and varying degrees of renal impairment. The dosage of tobramycin was 1.5–3 mg/kg body weight divided into three daily doses. The plasma and renal clearance of tobramycin were compared to that of creatinine. Tobramycin was excreted mainly by glomerular filtration and possibly also by tubular secretion in patients with impaired renal function. There were indications of increasing extrarenal elimination in patients with severe renal impairment. Tobramycin was well tolerated following intravenous and intramuscular injection and was effective in the eradication of urinary tract infections due to gram-negative bacteria, especially pseudomonas.

Zusammenfassung

Es wurde die Pharmakokinetik und Wirkung des neuen Aminoglycosids Tobramycin in der Behandlung von Patienten mit chronischer Harnwegsinfektion und unterschiedlichen Graden von Niereninsuffizienz untersucht. Die Tobramycin-Dosis lag zwischen 1,5–3,0 mg/kg Körpergewicht, die in drei Dosen täglich unterteilt wurden. Die Plasma- und Nierenclearance von Tobramycin wurde mit der Kreatininclearance verglichen. Tobramycin wurde hauptsächlich durch glomeruläre Filtration, möglicherweise aber auch durch tubuläre Sekretion bei Patienten mit Niereninsuffizienz ausgeschieden. Mehrere Anzeichen weisen auf eine steigende extrarenale Ausscheidung bei Patienten mit schwerer Niereninsuffizienz hin. Tobramycin wurde nach intravenöser und intramuskulärer Injektion gut vertragen und war wirksam in der Behandlung von Harnwegsinfektionen durch gram-negative Bakterien, besonders von Pseudomonas.

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Westenfelder, S.R., Welling, P.G. & Madsen, P.O. Efficacy and pharmacokinetics of tobramycin in patients with chronic urinary tract infections and various degrees of renal impairment. Infection 2, 76–79 (1974). https://doi.org/10.1007/BF01642025

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