A client with acute renal failure is undergoing a computed tomography (CT) scan with contrast dye. What precaution should the nurse take before the procedure?
Withhold all food and drink for 24 hours.
Assess the client's allergies, especially to iodine and shellfish.
Administer intravenous fluids to prevent dehydration.
Have the client remove all jewelry and metallic objects.
The Correct Answer is B
A. Incorrect. Withholding food and drink for 24 hours is not necessary for a CT scan with contrast dye.
B. Correct. Before a CT scan with contrast dye, it is essential to assess the client for allergies, especially to iodine and shellfish. Contrast dyes used in CT scans contain iodine, and clients with allergies to iodine or shellfish may have an allergic reaction to the contrast dye.
C. Incorrect. While administering intravenous fluids may be beneficial in certain situations, it is not a specific precaution for a CT scan with contrast dye.
D. Incorrect. Removing jewelry and metallic objects is a standard precaution for all imaging procedures, but it is not specific to a CT scan with contrast dye.
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Related Questions
Correct Answer is C
Explanation
A. Incorrect. Increased glomerular filtration rate (GFR) would lead to increased urine output, not decreased urine output.
B. Incorrect. Obstruction of the urethra would cause postrenal acute renal failure and may lead to urinary retention, but it would not cause decreased urine output in prerenal or intrinsic acute renal failure.
C. Correct. In prerenal and intrinsic acute renal failure, impaired blood flow to the kidneys reduces the perfusion of nephrons, leading to decreased urine output.
D. Incorrect. Excessive fluid intake may contribute to fluid overload and decreased urine output in prerenal acute renal failure, but it is not the primary pathophysiological process that leads to decreased urine output.
Correct Answer is A
Explanation
A. Correct. A renal ultrasound is an imaging test that uses sound waves to create images of the kidneys. It can help identify kidney stones, obstructions, and other structural abnormalities in the urinary tract.
B. Incorrect. The renal ultrasound does not directly measure the glomerular filtration rate (GFR), which is typically assessed through blood tests.
C. Incorrect. A renal ultrasound does not provide information about the number and types of blood cells in the bloodstream.
D. Incorrect. While a renal ultrasound can visualize the blood vessels in the kidneys, its primary purpose is to assess kidney structure, not blood flow.
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