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  • Title: [Measurements of vancomycin concentrations in the blood - a method of personalization the antibiotic therapy in patients with chronic kidney disease].
    Author: Pondel J, Krajewski P, Królikowska N, Tobiasz A, Augustyniak-Bartosik H, Hurkacz M.
    Journal: Pol Merkur Lekarski; 2017 Apr 21; 42(250):145-150. PubMed ID: 28530212.
    Abstract:
    UNLABELLED: Therapeutic Drug Monitoring is a recognized method of personalizing treatment, having particular application in patients with chronic kidney disease who have frequent infections, requiring administration of vancomycin. International guidelines indicate the need to adjust the dose of the drug to the state of renal function. The recommended therapeutic ranges of minimum and maximum levels should be achieved in order to increase the effectiveness and safety of treatment. AIM: The aim of this study was to evaluate the usefulness of measuring the concentration of vancomycin in patients with chronic kidney disease due to bacterial infection. MATERIALS AND METHODS: The study included 96 adult patients with chronic kidney disease of varying severity treated with vancomycin Patients were divided into 3 groups: treated by haemodialysis (hd), after renal transplantations (ktx), do not require renal replacement therapy (nef). In subjects were examined the minimum and maximum concentrations of vancomycin in steady-state and were compared with recommended therapeutic ranges. RESULTS: Statistically significant decrease of inflammatory markers was observed only in patients treated with dialysis. In the other groups not significant changes in values of inflammatory parameters were confirmed. Trough concentrations of vancomycin marked in patients were consistent with the recommendation of EUCAST, but exceeded the value recommended by the manufacturers of the drug. Considering absolute values of the minimum concentrations, only about 50% of patients achieved the therapeutic range (58% for recommendation EUCAST and 36% for the manufacturer's instructions). Peak concentration values indicated in dialyzed patients were below the prescribed range of 20-50 mg/l and averaged 17.7 mg / l. In the other subgroups they were correct. The rating of the absolute values of the peak concentrations of vancomycin also showed that only 46% (64% in the ktx, 30% - hd and 53% - nef) was within the recommended range, while 50% were classified as concentrations of sub-therapeutic (36% in the ktx, 42% of the nef group and 65% in hd). CONCLUSIONS: Vancomycin concentrations measured in patients with chronic kidney disease, both minimum and maximum, were not fully comply with the recommended therapeutic ranges, despite the use of doses determined based on a calculation of glomerular filtration rate. This points to the need for particularly careful monitoring of therapy and analysis of antibiotic concentrations to improve the effectiveness and reduce the incidence of undesirable consequences of treatment.
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