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Usefulness of serum cystatin C to determine the dose of vancomycin in neonate

 Jeong Eun Shin  ;  Soon Min Lee  ;  Ho Seon Eun  ;  Min Soo Park  ;  Kook In Park  ;  Ran Namgung 
 Korean Journal of Pediatrics, Vol.58(11) : 421-426, 2015 
Journal Title
Korean Journal of Pediatrics
Issue Date
Clearance ; Cystatin C ; Vancomycin
PURPOSE: The vancomycin dosage regimen is regularly modified according to the patient's glomerular filtration rate (GFR). In the present study, we aimed to assess the usefulness of serum cystatin C (Cys-C) concentration, compared with serum creatinine (SCr) concentration, for predicting vancomycin clearance (CLvcm) in neonates.

METHODS: We retrospectively analyzed the laboratory data of 50 term neonates who were admitted to the neonatal intensive care unit and received intravenous vancomycin, and assessed the pharmacokinetic profiles. Creatinine clearance (CLcr) and GFR based on Cys-C (GFRcys-c) were estimated using the Schwartz and Larsson formulas, respectively.

RESULTS: The mean CLvcm (±standard deviation) was 74.52±31.17 L/hr, the volume of distribution of vancomycin was 0.67±0.14 L, and vancomycin half-life was 9.16±17.42 hours. The SCr was 0.46±0.25 mg/dL and serum Cys-C was 1.43±0.34 mg/L. The peak and trough concentrations of vancomycin were 24.65±14.84 and 8.10±5.35 mcg/mL, respectively. The calculated GFR based on serum creatinine concentration (GFR-Cr) and GFRcys-c were 70.2±9.45 and 63.6±30.18 mL/min, respectively. The correlation constant for CLvcm and the reciprocal of Cys-C (0.479, P=0.001) was significantly higher than that for CLvcm and the reciprocal of SCr (0.286, P=0.044). GFRcys-c was strongly correlated with CLvcm (P=0.001), and the correlation constant was significantly higher than that for CLvcm and CLcr (0.496, P=0.001). Linear regression analysis showed that only GFRcys-c was independently and positively correlated with CLvcm (F=41.9, P<0.001).

CONCLUSION: The use of serum Cys-C as a marker of CLvcm could be beneficial for more reliable predictions of serum vancomycin concentrations, particularly in neonates.
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1. College of Medicine (의과대학) > Dept. of Pediatrics (소아과학교실) > 1. Journal Papers
Yonsei Authors
Namgung, Ran(남궁란) ORCID logo https://orcid.org/0000-0001-7182-9535
Park, Kook In(박국인) ORCID logo https://orcid.org/0000-0001-8499-9293
Park, Min Soo(박민수) ORCID logo https://orcid.org/0000-0002-4395-9938
Shin, Jeong Eun(신정은) ORCID logo https://orcid.org/0000-0002-4376-8541
Eun, Ho Seon(은호선) ORCID logo https://orcid.org/0000-0001-7212-0341
Lee, Soon Min(이순민) ORCID logo https://orcid.org/0000-0003-0174-1065
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