Progressive Care Nursing Certification (PCCN) Practice Exam

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What is the approximate normal value for glomerular filtration rate (GFR)?

  1. About 180 liters/day

  2. About 80 mL/minute

  3. About 150 mL/minute

  4. About 125 mL/minute

The correct answer is: About 125 mL/minute

The approximate normal value for glomerular filtration rate (GFR) is about 125 mL/minute. This value is crucial for assessing kidney function, reflecting the rate at which the kidneys filter blood. A normal GFR indicates adequate kidney performance in removing waste and excess substances from the bloodstream. This figure stands out as it aligns with the widely accepted reference range for healthy adults, which generally falls between 90 to 120 mL/minute but can be considered consistently around 125 mL/minute for effective clinical assessment. While other options reflect various measures, they do not represent the typical GFR in adults. The values that are significantly above or below this established normal range could indicate either an overestimation (as in liters per day) or underperformance in kidney function if they are expressed in mL/minute inappropriately. Understanding GFR's significance in the context of kidney health can aid healthcare professionals in diagnosing potential renal impairments swiftly.