Laboratory Test Reference Guide

Laboratory Information

Test Name

Glomerular Filtration Rate (Estimated)

Synonyms

GFR
EGFR
eGFR

Specimen Collection

Adult Specimen

Heparin (light green), SST(gold)"T-" labs SST (gold)

Paediatric Specimen

0.2ml Heparin (light green) or Plain(red).

Test Information

Department

Biochemistry

Test Availability

Mon - Sun, 24hrs

Laboratory Turnaround Time

3 hrs

Method

CKD-EPI calculation

Unit of measurement

mL/min/1.73m2

Reference interval

The glomerular filtration rate is >80 mL/min/1.73m2 in most healthy people less than 50 years of age. However, higher eGFR values as calculated by the CDK-EPI formula are reported as >90 mL/min, as the calculation is inaccurate above this value.

In children, height is required to calculate an eGFR. An online calculator is available:

https://www.niddk.nih.gov/health-information/communication-programs/nkdep/laboratory-evaluation/glomerular-filtration-rate-calculators/children-si-units

Minimum Volume

0.1 mL heparin plasma or serum.

Electronic Information

Registration Code

EGFR

HL7 mapping code

$EGFR