What is the typical normal range for glomerular filtration rate (GFR) in adults?

What is the typical normal range for glomerular filtration rate (GFR) in adults?

• A. 60 to 90 mL/min/1.73 m²
• B. 90 to 120 mL/min/1.73 m²
• C. 120 to 180 mL/min/1.73 m²
• D. 30 to 60 mL/min/1.73 m²

Answer: (B)

Normal GFR in adults is about 90 to 120 mL per minute per 1.73 m^2. This range reflects the kidneys’ filtration capacity standardized to body surface area, making it easier to compare people. Values around 90 are still considered normal, while a persistent drop below about 60 signals potential kidney disease. The upper limit of 120 mL/min/1.73 m^2 is the typical point beyond which filtration is not usually increased in healthy individuals, though brief higher values can occur in certain conditions. Keep in mind that GFR tends to decline with age, so what’s normal can shift a bit for older adults.

Normal GFR in adults is about 90 to 120 mL per minute per 1.73 m^2. This range reflects the kidneys’ filtration capacity standardized to body surface area, making it easier to compare people. Values around 90 are still considered normal, while a persistent drop below about 60 signals potential kidney disease. The upper limit of 120 mL/min/1.73 m^2 is the typical point beyond which filtration is not usually increased in healthy individuals, though brief higher values can occur in certain conditions. Keep in mind that GFR tends to decline with age, so what’s normal can shift a bit for older adults.