Abstract
Purpose
Data on the anti-Xa efficacy of fondaparinux in dialysis-dependent chronic kidney disease (DD-CKD) patients are scarce. This study characterizes the pharmacokinetics (PK) and pharmacodynamics (PD) of fondaparinux in DD-CKD patients undergoing renal replacement therapy (RRT), to assess dosing strategies.
Methods
A retrospective, observational study was conducted using data on anti-Xa activity (112 samples) from 12 (3 male and 9 female) DD-CKD patients (median (IQR) age 71 years (63–88), weight 73 kg (59–98.5)). Eleven patients underwent high-flux or low-flux hemodialysis (HD) and one patient underwent peritoneal dialysis. Three patients were also treated with therapeutic plasma exchange (TPE). A non-linear mixed effects analysis was performed using NONMEM 7.3.0.
Results
The lab-specific slope of the relationship between fondaparinux concentration and anti-Xa levels was 1.18 IU/µg. In a one-compartment model, clearance (CL) and volume of distribution (Vd) were 0.05289 L/h and 5.55 L, respectively. High-flux HD was found to increase the CL of fondaparinux 2.26 times. TPE also considerably increased CL, but the fold-change could not be accurately estimated. Low-flux HD and peritoneal dialysis did not impact PK parameters.
Conclusions
Model-based simulations showed that standard dosing (2.5 mg three times weekly before HD) results in a median anti-Xa activity of 0.55 IU/mL and 0.98 IU/mL, pre- and post-low-flux HD, respectively. In patients undergoing high-flux HD, these values are approximately 27% lower. Additional caution is warranted with TPE, as this treatment can reduce anti-Xa activity even further.
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Code availability
The data are not available in any public repository. The model codes will be made available through the model repository of DDMoRe available through: http://repository.ddmore.foundation/.
Change history
16 September 2021
A Correction to this paper has been published: https://doi.org/10.1007/s00228-021-03220-y
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This work was supported by the Charles University Project Progress Q25 and grant No. SVV 260 523.
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The study was conceived and designed by J.M.H., D.M, and E.H.J.K.; Data were collected and retreived by J.M.H. Z.H., V.B., B.S., V.P., V.T.and; A.M. E.H.J.K. supervised the data analysisAll authors contributed to writing the manuscript.
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The study was approved by ethical comittee of General University Hoaspital in Prague under reference number 114/21 S-IV.
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At admission, the patients signed an informed consent wherein they agree, inter alia, that anonymous data can be used for research and publication of the research results.
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Michaličková, D., Hartinger, J.M., Hladinová, Z. et al. Population pharmacokinetics-pharmacodynamics of fondaparinux in dialysis-dependent chronic kidney disease patients undergoing chronic renal replacement therapy. Eur J Clin Pharmacol 78, 89–98 (2022). https://doi.org/10.1007/s00228-021-03201-1
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DOI: https://doi.org/10.1007/s00228-021-03201-1