JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
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Evaluation of Meropenem Penetration into Cerebrospinal Fluid in Patients with Meningitis After Neurosurgery.

World Neurosurgery 2017 Februrary
OBJECTIVE: Meropenem is important for management of postneurosurgical meningitis, but the data about its penetration into cerebrospinal fluid (CSF) are inadequate. This prospective, open-label study investigated the pharmacokinetic profile of meropenem in patients with postneurosurgical meningitis, especially its CSF penetration.

METHODS: A total of 82 patients with postneurosurgical meningitis were included to receive meropenem intravenously according to a regimen of 2 g every 8 hours, 1 g every 8 hours, or 1 g every 6 hours. After infusion of 4 doses, blood and CSF samples were collected simultaneously at predefined time points. The high-performance liquid chromatography ultraviolet method was used to determine the concentration of meropenem.

RESULTS: The peak meropenem concentration in blood and CSF was 43.2 ± 5.3 and 2.4 ± 0.3 mg/L in the group who received 2 g every 8 hours; 28.9 ± 2.7 and 1.2 ± 0.2 mg/L in the group who received 1g every 8 hours; and31.5 ± 3.4 and 1.6 ± 0.2 mg/L in the group who received 1g every 6 hours. The maximal percent penetration into CSF was 17.6% ± 7.3%, 14.3% ± 1.7%, and 30.9% ± 24.2%, respectively.

CONCLUSIONS: Dosing regimens of meropenem 1 g every 6 hours and 2 g every 8 hours provided higher CSF penetration than 1 g every 8 hours. A higher dose and shorter dosing interval of meropenem may be more useful for clearance of pathogens.

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