Estimation of Cystatin C as a Marker of Renal Function to Predict Serum Trough Concentrations of Vancomycin / 医药导报

ABSTRACT

Objective To investigate the clinical efficiency of serum cystatin C as a marker of renal function to predict serum trough concentrations of vancomycin. Methods Data on trough concentrations of vancomycin(Cmea ),serum creatinine (Scr)concentrations,cystatin C( Cys C) concentrations were collected from 81 hospitalized patients who received vancomycin therapy. Predicted vancomycin trough concentrations(Cpre )were calculated based on Scr or Cys C concentrations associating with Bayesian forecasting method through NONMEM software. Finally,the correlations and distinctions between Cpre and Cmea were comparatively analyzed. Results There were both correlation between Cpre and Cmea in relation to Scr or Cys C(r = 0. 678,P<0. 01;r=0. 727,P<0. 01). Besides,the errors of mean predictive error(ME),mean absolute error(MAE)and root-mean-square error(RMSE)for Scr was - 5. 79,6. 86,9. 86 μg · mL-1 , respectively, where as the errors for Cys C was - 0. 82,5. 42, 7. 74 μg·mL-1 ,respectively. Conclusion Cystatin C is a good marker of renal function available for predicting serum vancomycin concentrations.