Certified Nephrology Nurse Certification (CNN) Practice Exam 2025 – Comprehensive All-in-One Study Guide for Exam Success!

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

70 to 90 mL/min

90 to 120 mL/min

The normal range of glomerular filtration rate (GFR) in healthy adults is typically between 90 to 120 mL/min. GFR is a crucial indicator of kidney function, reflecting how well the kidneys are filtering blood. Values within this range indicate that the kidneys are functioning effectively and efficiently.

A GFR significantly above or below this normal range can signify various health issues. For instance, a GFR below 60 mL/min is generally concerning and may indicate chronic kidney disease, while abnormally high levels might suggest hyperfiltration, often seen in conditions like diabetes.

Understanding the normal GFR range is essential in clinical practice, as it aids healthcare providers in evaluating kidney function and making informed decisions regarding patient care and potential interventions.

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120 to 150 mL/min

150 to 180 mL/min

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