Imperial Collage Healthcare

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Estimated glomerular filtration rate (eGFR)


Lab Code : GFR


Test Background
Calculation of the MDRD formula-derived eGFR is performed automatically on all creatinine requests as a screening test for kidney disease. It is invalidated by: acute renal failure, pregnancy, oedematous states, muscle-wasting disorders, in amputees and the malnourished. eGFR only correlates to CKD stage in the presence of other clinical indicators such as haematuria/ proteinuria.


Clinical Indications
Suspected and monitoring of established chronic renal failure.


Reference Range
Stage 1      >90 mL/min/1.73 m2
Stage 2      60-89 mL/min/1.73 m2 
Stage 3      30-59 mL/min/1.73 m2
Stage 4     15-29 mL/min/1.73 m2 
Stage 5     <15 mL/min/1.73 m2


Sample Required
SST (gold top)


Sample Volume
0.5 mL


Turnaround Time
1 day


Notes

If patient is of black African origin, multiply eGFR by 1.2

We do not calculate eGFR below 18 years


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