CAMRT Radiography Practice Exam

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

1. 90 to 120 mL/min

2. 0.05 to 1.2 mg/dL

3. 10 to 20 mg/dL

4. 110-115 mL/min

The correct answer is: 90 to 120 mL/min

The normal range for glomerular filtration rate (GFR) is indeed generally accepted to be between 90 to 120 mL/min. This range indicates the kidneys' efficiency in filtering blood and is critical for assessing kidney function. GFR reflects how well the kidneys are working to filter waste from the bloodstream, expelling it through urine. A value within this normal range suggests that the kidneys are performing adequately without significant impairment. Lower values can indicate varying degrees of kidney dysfunction or disease, necessitating further investigation. Other options provided relate to different laboratory values that are indicative of kidney health but do not measure GFR directly. For example, concentrations of creatinine in the blood and urea levels are important to monitor kidney function as well; however, they serve to provide context rather than measure the filtration capacity directly. Understanding GFR is pivotal in diagnosing and managing renal conditions effectively.