Related Experiment Video
Updated: Jul 11, 2025

Assessment of Kidney Function in Mouse Models of Glomerular Disease
Published on: June 30, 2018
Evaluation of eGFRs to Calculate Kidney Function in Adults with Severe Motor and Intellectual Disabilities
Osamu Uemura1, Yuka Hasegawa2, Hideaki Nakashima2
1Department of Pediatrics, Ichinomiya Medical Treatment & Habilitation Center, Ichinomiya, Japan.
Introduction:
The gold standard for evaluating kidney function is kidney inulin clearance (Cin). However, this procedure is difficult to perform in patients with neuromuscular disabilities and/or bladder dysfunction. We aimed to develop a simpler method for determining the estimated glomerular filtration rate (eGFR) using equations and values for three biomarkers: serum creatinine (sCr), serum cystatin C (cysC), and serum beta-2 microglobulin (β2MG). This study evaluated three eGFR equations in patients with severe motor and intellectual disabilities (SMID).
Methods:
We evaluated the equations using data of 18 adult SMID patients with a clinical need for creatinine clearance (Ccr). We compared the results of each equation with Ccr-based eGFR instead of Cin using mean error (ME), root mean square error (RMSE), and P30.
Results:
Based on eGFR, the ME values of Cr, cysC, β2MG, and Ccr were 74.5, 2.3, and 6.5 mL/min/1.73 m2, RMSE values, 92.3, 25.7, and 33.4 mL/min/1.73 m2; and P30, 16.7%, 77.8%, and 72.2%, respectively.
Conclusions:
eGFR-Cr cannot be used to reliably assess kidney function in adult SMID patients. It is better to use eGFR-cysC to evaluate kidney function in this patient population.
Related Concept Videos
Factors Affecting Renal Clearance: Renal Impairment
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
Chronic Kidney Disease III: Interprofessional Care
Serum Studies: Renal Function Tests
Renal Failure: Dose Adjustments
Reduced renal clearance and elimination rate are common outcomes of renal impairment. These alterations lead to a prolonged elimination half-life and an altered apparent volume of distribution for drugs. As a result, dosage adjustments are typically necessary to maintain optimal drug levels in the body.
However, dosage adjustments...
Chronic Kidney Disease I: Introduction
Acute Kidney Injury IV: Diagnostic Studies and Prevention

