The term end-stage renal disease (ESRD) is considered appropriate when GFR falls to
**Core Concept**
The term end-stage renal disease (ESRD) refers to the final stage of chronic kidney disease (CKD), where the kidneys have lost nearly all their ability to function and perform their vital roles in the body. The glomerular filtration rate (GFR) is a key measure of kidney function, and a significant decline in GFR is a hallmark of ESRD.
**Why the Correct Answer is Right**
A GFR of less than 15 mL/min/1.73 m^2 is generally considered the threshold for ESRD. This is because the kidneys are no longer able to effectively filter waste products and excess fluids from the blood, leading to a buildup of toxins and electrolyte imbalances. The kidneys' ability to regulate blood pressure, maintain acid-base balance, and produce essential hormones also becomes severely impaired at this stage.
**Why Each Wrong Option is Incorrect**
**Option A:** A GFR of 30-60 mL/min/1.73 m^2 may indicate stage 3 or 4 CKD, but it is not sufficient to classify a patient as having ESRD.
**Option B:** A GFR of 10-15 mL/min/1.73 m^2 may be seen in patients with severe CKD, but it is still not considered ESRD, as some kidney function may still be preserved.
**Option C:** A GFR of 5-10 mL/min/1.73 m^2 is not a commonly used threshold for ESRD, and it may not accurately reflect the severity of kidney dysfunction in some patients.
**Clinical Pearl / High-Yield Fact**
It's essential to note that the GFR is not the only factor in determining ESRD. Other clinical indicators, such as the presence of uremic symptoms, electrolyte imbalances, and anemia, should also be considered when making a diagnosis.
**Correct Answer: D. 15**