ABSTRACT
Objective To investigate the target achievement of serum trough concentration of vancomycin in elderly patients routinely treated with vancomycin,and to analyze the influencing factors for vancomycin-associated acute kidney injury(VA-AKI).Methods A single-center retrospective study was conducted by collecting clinical data of elderly inpatients from January 2016 to July 2017 who received intravenous vancomycin therapy and serum vancomycin trough concentration test.Logistic regression was used to analyze the risk factors for VA-AKI.Results A total of 141 patients were enrolled,including 74 males (52.5 ％) and 67 females (47.5 ％).The median (interquartile range)age was 77.0(13.5) years old.Patients with serum vancomycin trough concentrations within 10～ 20 mg/L accounted for 48.9 ％ (69 cases),while those lower than the target value accounted for 23.4 ％ (33 cases),and those higher than the target value accounted for 27.7％ (39 cases).Patients were divided into three groups according to the vancomycin serum trough concentration:＜10 mg/L group,10～20 mg/L group,and ＞20 mg/L group.There were statistically significant differences among the three groups in median(interquartile range) age[74.0 (14.0) years old,76.0 (11.5) years old vs.80.0 (14.0) years old,H =9.506,P =0.009] and the median (interquartile range) vancomycin daily dose [1.5(0.5) g/d,1.5 (0.8) g/d vs.1.5 (0.5) g/d,H =6.131,P =0.047].VA-AKI occurred in 23 patients(16.3 ％).Logistic regression analysis showed that the baseline serum creatinine levels (OR =1.022,95 ％CI:1.001 ～ 1.042,P =0.035)and vancomycin trough concentration(OR =1.058,95 ％CI:1.011～1.106,P=0.015)were influencing factors for VA-AKI.Conclusions The elderly patients with infection who received clinical vancomycin therapy have a low target achievement rate of serum trough concentration.Baseline serum creatinine level and serum vancomycin trough concentration are influencing factors for VA-AKI.