Skip to main content

Daptomycin elimination by continuous venovenous hemofiltration: in vitro evaluation of factors influencing sieving and membrane adsorption

The present in vitro study set out to determine for the first time the continuous venovenous hemofiltration (CVVH) clearance of the novel lipopetide antibiotic, daptomycin, from human whole blood. Factors influencing daptomycin sieving and membrane adsorption were investigated in an in vitro setting. A recirculation model was established and daptomycin was added to the simulated blood circuit at different concentrations and in different solvent systems. The concentration of daptomycin over time in the modelled blood compartment and in ultrafiltrate was measured by HPLC. Mean sieving coefficients (SCs) of daptomycin over time were 1 ± 0.05, 0.3 ± 0.02 and 0.4 ± 0.03 in Ringer lactate, Ringer lactate containing human albumin and plasma, respectively. The CVVH clearance of daptomycin from whole blood exceeded the physiological clearance in an individual with normal renal function. Adsorption of daptomycin to synthetic surfaces proved moderate, resulting in loss of around 20% of the initial dose at 1 hour after the start of CVVH. Since mean SCs of daptomycin in protein-containing media were higher than the free fraction in plasma, our results suggest that besides protein binding, unknown factors such as intracellular drug partitioning influence sieving of daptomycin during hemofiltration. Due to the high in vitro CVVH clearance of daptomycin we determined from human whole blood, we recommend monitoring of daptomycin concentrations in patients undergoing hemofiltration.

Author information

Affiliations

Authors

Corresponding author

Correspondence to Markus Zeitlinger.

Rights and permissions

Open Access This article is published under license to BioMed Central Ltd. This is an Open Access article is distributed under the terms of the Creative Commons Attribution License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and Permissions

About this article

Cite this article

Wagner, C., Steiner, I. & Zeitlinger, M. Daptomycin elimination by continuous venovenous hemofiltration: in vitro evaluation of factors influencing sieving and membrane adsorption. BMC Pharmacol 7, A21 (2007). https://doi.org/10.1186/1471-2210-7-S2-A21

Download citation

  • Published:

  • DOI: https://doi.org/10.1186/1471-2210-7-S2-A21

Keywords

  • Solvent System
  • Initial Dose
  • Normal Renal Function
  • Daptomycin
  • Unknown Factor