What value defines normal kidney function in terms of eGFR?

What value defines normal kidney function in terms of eGFR?

• A. ≥60 mL/min/1.73 m².
• B. ≥75 mL/min/1.73 m².
• C. ≥90 mL/min/1.73 m².
• D. ≥120 mL/min/1.73 m².

Answer: (C)

eGFR measures how well the kidneys are filtering the blood, expressed as milliliters per minute per 1.73 square meters of body surface. Normal kidney function is defined as an eGFR of at least 90 mL/min/1.73 m². Values at or above this threshold indicate normal filtration capacity. When eGFR falls below 90, it signals some reduction in filtering, but mild decreases (60–89) can occur with aging and may not indicate disease unless there’s evidence of kidney damage or the reduction persists for several months. An eGFR below 60 is the range where CKD is typically considered present, with increasing severity as the value declines. The other numerical thresholds aren’t used as the standard cutoff for normal function.

eGFR measures how well the kidneys are filtering the blood, expressed as milliliters per minute per 1.73 square meters of body surface. Normal kidney function is defined as an eGFR of at least 90 mL/min/1.73 m². Values at or above this threshold indicate normal filtration capacity. When eGFR falls below 90, it signals some reduction in filtering, but mild decreases (60–89) can occur with aging and may not indicate disease unless there’s evidence of kidney damage or the reduction persists for several months. An eGFR below 60 is the range where CKD is typically considered present, with increasing severity as the value declines. The other numerical thresholds aren’t used as the standard cutoff for normal function.