万古霉素在重症急性胰腺炎患者中的药动学研究(英文)
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摘要
目的:对重症急性胰腺炎(SAP)患者使用万古霉素后的血药浓度及其药代动力学进行研究,并对万古霉素血药浓度的影响因素进行分析。方法:收集SAP患者使用万古霉素的稳态谷浓度测定数据(SAP组);根据万古霉素的用药时间不同,将其谷浓度数据进一步分组,SAP发病21天内测得的浓度(早期组),发病22-28天内测得的浓度(中期组)以及发病28天以上的浓度(晚期组)。结果:共收集到33例患者共计80例次万古霉素谷浓度数据。与万古霉素标准治疗浓度(15mg/L)相比,SAP组浓度显著降低(8.3mg/L,p<0.001),Bayesian法估算的万古霉素表观分布容积为70.3L,清除率为7.6L/h;早期组和中期组的浓度较晚期组的浓度显著降低(p<0.001),表观分布容积和清除率显著增加(p<0.01)。回归分析显示,万古霉素谷浓度不仅与患者的血清肌酐清除率,平均日剂量相关,而且与万古霉素的用药时间显著相关。结论:SAP患者的万古霉素谷浓度显著降低,且万古霉素的用药时间越早,浓度越低。在SAP治疗早期,应给与较高剂量的万古霉素以保证临床治疗效果,减少细菌耐药。
Objective To evaluate the pharmacokinetics of vancomycin in patients with severe acute pancreatitis(SAP).Methods 67 patients with SAP were included.The FPIA method was used to measure vancomycin serum trough concentrations,and the pharmacokinetic parameters were calculated using the Bayesian estimator.Comparisons of mean values were analyzed using SPSS 11.0.Results The average daily dose of vancomycin was 15.0 ±3.7mg/kg(ql2h).67 trough concentrations were collected.Compared with the recommended standard vancomycin trough concentration(15 mg/L),SAP patients had significantly lower vancomycin trough concentrations(6.1 ±3.0mg/L;p<0.0001),while the Vd and CL of vancomycin were significantly increased.Multiple regression analysis revealed that vancomycin trough concentration was strongly correlated not only with age,albumin,but also with the duration from SAP onset to vancomycin therapy(p < 0.0001).Stepwise regression analysis revealed that the duration was the most important variable for vancomycin trough concentration(r~2 = 0.456).The relationships between vancomycin trough concentrations and the duration were further evaluated after the 67 patients were stratified into two groups according to the duration from SAP onset to vancomycin TDM within or over 4 weeks.Early group had much lower trough concentrations compared with late group and the CL was also significantly increased in early group.Of these 67 patients,24 patients made vancomycin dosage adjustment(increased to 18.5 ± 3.9mg/kg,q12h),the average trough concentrations increased to 12.6±3.8 mg/L.Conclusions The serum trough concentration of vancomycin was significantly reduced in SAP patients.Higher dosage regimen was needed to ensure the clinical effect,reduce the bacterial resistance.
引文
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