Ling et al developed an equation for estimating glomerular filtration rate (GFR) in a patient after liver transplantation using serum cystatin C. Other equations for estimating GFR from cystatin C tend to underestimate the true GFR in this population. The authors are from Zhejiang University in Hangzhou, China.


Patient selection: adult during the first week after liver transplantation


Method for measuring GFR: 99mTc-DTPA clearance


Method for measuring cystatin C: N Latex CysC kit (Dade Behring)



(1) serum cystatin C


predicted GFR in mL per minute per 1.73 square meter BSA =

= (96.21 * (1 / (serum cystatin C))) + 19.12



• The accuracy of the estimated GFR was significantly higher than other cystatin C equations.


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