Therapeutic drug monitoring of beta-lactam antibiotics: influence of sample stability on the analysis of piperacillin, meropenem, ceftazidime and flucloxacillin by HPLC-UV
Introduction Therapeutic drug monitoring (TDM) is a useful tool to optimize antibiotic therapy. Increasing interest in alternative dosing strategies of beta-lactam antibiotics, e.g. continuous or prolonged infusion, require a feasible analytical method for quantification of these antimicrobial agent...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
22 May 2017
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| In: |
Journal of pharmaceutical and biomedical analysis
Year: 2017, Jahrgang: 143, Pages: 86-93 |
| ISSN: | 1873-264X |
| DOI: | 10.1016/j.jpba.2017.05.037 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1016/j.jpba.2017.05.037 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0731708517302741 
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| Verfasserangaben: | Nadine Pinder, Thorsten Brenner, Stefanie Swoboda, Markus A. Weigand, Torsten Hoppe-Tichy |
MARC
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| 245 | 1 | 0 | |a Therapeutic drug monitoring of beta-lactam antibiotics |b influence of sample stability on the analysis of piperacillin, meropenem, ceftazidime and flucloxacillin by HPLC-UV |c Nadine Pinder, Thorsten Brenner, Stefanie Swoboda, Markus A. Weigand, Torsten Hoppe-Tichy |
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| 520 | |a Introduction Therapeutic drug monitoring (TDM) is a useful tool to optimize antibiotic therapy. Increasing interest in alternative dosing strategies of beta-lactam antibiotics, e.g. continuous or prolonged infusion, require a feasible analytical method for quantification of these antimicrobial agents. However, pre-analytical issues including sample handling and stability are to be considered to provide valuable analytical results. Methods for the simultaneous determination of piperacillin, meropenem, ceftazidime and flucloxacillin, a high performance liquid chromatography (HPLC) method including protein precipitation was established utilizing ertapenem as internal standard. Long-term stability of stock solutions and plasma samples were monitored. Furthermore, whole blood stability of the analytes in heparinized blood tubes was investigated comparing storage under ambient conditions and 2-8°C. Results A calibration range of 5-200μg/ml (piperacillin, ceftazidime, flucloxacillin) and 2-200μg/ml (meropenem) was linear with r2>0.999, precision and inaccuracy were <9% and <11%, respectively. The successfully validated HPLC assay was applied to clinical samples and stability investigations. At −80°C, plasma samples were stable for 9 months (piperacillin, meropenem) or 13 months (ceftazidime, flucloxacillin). Concentrations of the four beta-lactam antibiotics in whole blood tubes were found to remain within specifications for 8h when stored at 2-8°C but not at room temperature. Conclusions The presented method is a rapid and simple option for routine TDM of piperacillin, meropenem, ceftazidime and flucloxacillin. Whereas long-term storage of beta-lactam samples at −80°C is possible for at least 9 months, whole blood tubes are recommended to be kept refrigerated until analysis. | ||
| 650 | 4 | |a Continuous infusion | |
| 650 | 4 | |a High performance liquid chromatography | |
| 650 | 4 | |a Plasma concentrations | |
| 650 | 4 | |a Pre-analytical stability | |
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| 650 | 4 | |a Whole blood | |
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