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Tobramycin concentrations during peritoneal dialysis.

A J Weinstein, A W Karchmer, R C Moellering

    Antimicrobial Agents and Chemotherapy
    |October 1, 1973
    PubMed
    Summary
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    Peritoneal dialysis did not effectively remove tobramycin in a patient with renal failure. However, urine tobramycin levels remained sufficient for treating gram-negative infections despite poor kidney function.

    Area of Science:

    • Nephrology
    • Pharmacology
    • Infectious Diseases

    Background:

    • Severe renal failure necessitates dialysis and careful drug management.
    • Aminoglycosides like tobramycin require dose adjustment in renal impairment.
    • Peritoneal dialysis is a treatment option for end-stage renal disease.

    Purpose of the Study:

    • To assess tobramycin removal efficiency during peritoneal dialysis in a patient with severe renal failure.
    • To evaluate tobramycin serum and urine concentrations in this clinical scenario.

    Main Methods:

    • Case report of a patient with severe renal failure on peritoneal dialysis.
    • Therapeutic drug monitoring of serum and peritoneal dialysis effluent tobramycin levels.
    • Analysis of urine tobramycin concentrations.

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    Main Results:

    • Peritoneal dialysis demonstrated limited efficacy in clearing serum tobramycin.
    • Tobramycin concentrations in the dialysis effluent were low.
    • Despite oliguric renal failure, urine tobramycin concentrations were adequate for treating common gram-negative urinary tract infections.

    Conclusions:

    • Standard peritoneal dialysis may be insufficient for tobramycin removal in severe renal failure.
    • Urine tobramycin levels can remain therapeutically relevant even with impaired renal function and during peritoneal dialysis.
    • This case highlights the importance of considering drug excretion pathways beyond serum clearance in patients with renal failure.