GFR is calculated from gender, race, age and serum creatinine according to the Chronic Kidney Disease Epidemiology (CKD-EPI) algorithm as recommended by the National Kidney Foundation (NKF). It is more accurate than the Modification of Diet in Renal Disease (MDRD) Study equation, particularly in people with higher levels of GFR.
Besides, ACR is calculated by dividing albumin concentration by creatinine concentration.
Please note ACR is the first method of preference to detect elevated amounts of urine protein (a routine dipstick is not sensitive enough to detect small amounts of urine protein).
The recommended method to evaluate albuminuria (the increased excretion of urinary albumin and a marker of kidney damage), is to measure urinary ACR in a spot urine sample.
Although the 24-hour collection has been the gold standard, alternative methods for detecting protein excretion such as urinary ACR correct for variations in urinary concentration due to hydration as well as provide more convenience than timed urine collections. The spot specimen correlates well with 24-hour collections in adults.
Both GFR and ACR are included in Kidney Disease Improving Global Outcomes (KDIGO) Guidelines.
- 9.0 MB
- Release Date:
- Blueberry Diagnostics SL
Safe to Download