A client with chronic renal failure asks the nurse about the purpose of the glomerular filtration rate (GFR) test. What is the nurse's best response?
"The GFR test measures the volume of urine produced in 24 hours."
"This test helps assess the client's blood glucose levels."
"The GFR test evaluates how well your kidneys are filtering waste and fluids from the blood."
"It measures the client's ability to excrete potassium and sodium in the urine."
The Correct Answer is C
A. Incorrect. The volume of urine produced in 24 hours is measured through a different test called the 24-hour urine collection, not the GFR test.
B. Incorrect. The GFR test does not assess blood glucose levels; it is primarily used to evaluate kidney function.
C. Correct. The GFR test measures how well the kidneys are filtering waste and fluids from the blood. It is an important indicator of kidney function and is commonly used to stage chronic renal failure.
D. Incorrect. The GFR test does not specifically measure the excretion of potassium and sodium in the urine; instead, it focuses on overall kidney function and filtration rate.
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Related Questions
Correct Answer is D
Explanation
A. Incorrect. Converting the creatinine level to micromoles per liter is not necessary for the GFR calculation.
B. Incorrect. While a 24-hour urine sample can be used to measure creatinine clearance, it is not required for the GFR calculation, which can be estimated using formulas.
C. Incorrect. Calculating the body surface area is not necessary for the GFR calculation.
D. Correct. The GFR can be estimated using formulas that include the serum creatinine level, such as the Modification of Diet in Renal Disease (MDRD. formula or the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation.
Correct Answer is B
Explanation
A. Incorrect. Pruritus (itching) is a common symptom of chronic renal failure and is related to the buildup of waste products and toxins in the blood, leading to skin irritation.
B. Correct. Pruritus is a common and distressing symptom of chronic renal failure, caused by the retention of uremic toxins in the blood. These toxins can irritate the skin and lead to itching.
C. Incorrect. While medications can sometimes cause pruritus as a side effect, it is not the primary cause of itching in clients with chronic renal failure.
D. Incorrect. Persistent pruritus in a client with chronic renal failure is not necessarily indicative of an allergic reaction to medications. It is more likely related to the buildup of waste products in the blood.
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