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Elimination of fluconazole during continuous renal replacement therapy. An in vitro assessment.
International Journal of Artificial Organs 2020 November 22
INTRODUCTION: Continuous renal replacement therapy (CRRT) efficiently eliminates fluconazole. However, the routes of elimination were not clarified. Adsorption of fluconazole by filters is a pending question. We studied the elimination of fluconazole in a model mimicking a session of CRRT in humans using the NeckEpur® model. Two filters were studied.
METHODS: The AV1000® -polysulfone filter with the Multifiltrate Pro. Fresenius and the ST150® -polyacrylonitrile filter with the Prismaflex. Baxter-Gambro were studied. Continuous filtration used a flowrate of 2.5 L/h in post-dilution only. Session were made in duplicate. Routes of elimination were assessed using the NeckEpur® model.
RESULTS: The mean measured initial fluconazole concentration (mean ± SD) for the four sessions in the central compartment (CC) was 14.9 ± 0.2 mg/L. The amount eliminated from the CC at the end of 6 h-session at a 2.5 L/h filtration flowrate for the AV1000® -polysulfone and the ST150® -polyacrylonitrile filters were 90%-93% and 96%-94%, respectively; the clearances from the central compartment (CC) were 2.5-2.6 and 2.4-2.3 L/h, respectively. The means of the instantaneous sieving coefficient were 0.94%-0.91% and 0.99%-0.91%, respectively. The percentages of the amount eliminated from the CC by filtration/adsorption were 100/0%-95/5% and 100/0%-100/0%, respectively.
CONCLUSION: Neither the ST150® -polyacrylonitrile nor the AV1000® -polysulfone filters result in any significant adsorption of fluconazole.
METHODS: The AV1000® -polysulfone filter with the Multifiltrate Pro. Fresenius and the ST150® -polyacrylonitrile filter with the Prismaflex. Baxter-Gambro were studied. Continuous filtration used a flowrate of 2.5 L/h in post-dilution only. Session were made in duplicate. Routes of elimination were assessed using the NeckEpur® model.
RESULTS: The mean measured initial fluconazole concentration (mean ± SD) for the four sessions in the central compartment (CC) was 14.9 ± 0.2 mg/L. The amount eliminated from the CC at the end of 6 h-session at a 2.5 L/h filtration flowrate for the AV1000® -polysulfone and the ST150® -polyacrylonitrile filters were 90%-93% and 96%-94%, respectively; the clearances from the central compartment (CC) were 2.5-2.6 and 2.4-2.3 L/h, respectively. The means of the instantaneous sieving coefficient were 0.94%-0.91% and 0.99%-0.91%, respectively. The percentages of the amount eliminated from the CC by filtration/adsorption were 100/0%-95/5% and 100/0%-100/0%, respectively.
CONCLUSION: Neither the ST150® -polyacrylonitrile nor the AV1000® -polysulfone filters result in any significant adsorption of fluconazole.
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