Étude in vitro de la cinétique d’élution et de l’activité biologique de la pipéracilline/tazobactam et de la gentamicine dans du ciment osseux acrylique - 25/11/22
In-vitro study of elution kinetics and biological activity of piperacillin/tazobactam and gentamicin in acrylic bone cement
Abstract |
Background |
Antibiotics differ in their elution characteristics from bone cement. But no such data is available on piperacillin and tazobactam. Therefore, we performed an in vitro observational study to examine: (1) in-vitro elution characteristics of piperacillin and tazobactam from bone cement, (2) their biological activity using minimum inhibitory concentration and (3) elution characteristics and biological activity when combined with gentamicin in bone cement.
Hypothesis |
The null hypothesis was that piperacillin and tazobactam after elution from bone cement can achieve concentrations higher than minimum inhibitory concentration.
Material and methods |
Forty milligrams bone cement was mixed with the following combination of antibiotics: without any antibiotic (Sample A, Control), 4g/0.50g piperacillin/tazobactam (Sample B), 6g/0.75g piperacillin/tazobactam (Sample C), 8g/1.0g piperacillin/tazobactam (Sample D) and 4g/0.50g piperacillin/tazobactam and 400mg gentamicin (Sample E). Samples were analysed on reverse-phase ultra-high-performance liquid chromatography. Antibacterial activity in the elute were tested against standard ATCC (American Type Culture Collection) strains.
Results |
Detectable drug elution for piperacillin and tazobactam was seen till 21 days. Peak drug levels for all formulations were seen at 48hours (140.8 and 297.5μg/ml for Samples B of piperacillin and tazobactam respectively). About 0.83–1.24% of piperacillin and 23.17-29.17% of tazobactam were released from the samples. Gentamicin improved elution of piperacillin and tazobactam: 140.8 vs 919.9μg/ml (p = 0.000) for Samples B and E of piperacillin respectively and 297.5 and 1138.4μg/ml (p = 0.001) for Samples B and E of tazobactam respectively at 2 days. Sample E showed complete inhibition of tested microorganisms, while B sample was microbiologically less active compared to E on day 5.
Conclusions |
Piperacillin and tazobactam eluted successfully from bone cement and also retained antimicrobial activity after elution. Maximum elution was seen up to day 2 after which it reduced drastically. Antimicrobial action was seen up to 7 days.
Level of evidence |
III; comparative study.
Le texte complet de cet article est disponible en PDF.Keywords : Elution kinetics, Gentamicin, Bone cement, Piperacillin, Tazobactam, High pressure liquid chromatography
☆ | Cet article peut être consulté in extenso dans la version anglaise de la revue Orthopaedics & Traumatology: Surgery & Research sur Science Direct (sciencedirect.com) en utilisant le DOI ci-dessus. |
Vol 108 - N° 8
P. 1039 - décembre 2022 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
Déjà abonné à cette revue ?