The term’ end stage renal disease (ESRD)’ is considered appropriate when GFR falls to-
**Core Concept**
End-stage renal disease (ESRD) is a condition where the kidneys have lost nearly all their ability to do their job effectively, and as a result, the glomerular filtration rate (GFR) drops significantly. This decline in kidney function is irreversible and requires renal replacement therapy, such as dialysis or a kidney transplant.
**Why the Correct Answer is Right**
The GFR is a measure of the kidneys' ability to filter waste products from the blood. As the kidneys lose function, the GFR decreases. The National Kidney Foundation defines ESRD as a GFR of less than 15 mL/min/1.73 m^2. This cutoff is based on the fact that at this level, the kidneys are unable to maintain electrolyte balance, acid-base balance, and fluid status without external assistance.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a GFR of 30-60 mL/min/1.73 m^2 indicates chronic kidney disease (CKD) stage 3, not ESRD.
**Option B:** This option is incorrect because a GFR of 15-30 mL/min/1.73 m^2 indicates CKD stage 4, which is still reversible with treatment.
**Option C:** This option is incorrect because a GFR of 60-90 mL/min/1.73 m^2 indicates normal or near-normal kidney function.
**Clinical Pearl / High-Yield Fact**
It's essential to note that the GFR is a dynamic measure that can fluctuate based on various factors, such as hydration status, medication use, and underlying medical conditions. A single measurement may not accurately reflect the patient's true kidney function.
**Correct Answer:** C. 15 mL/min/1.73 m^2.