A nurse is assessing a client at risk for postrenal acute renal failure. What condition should the nurse prioritize in the client's assessment?

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.

A. Incorrect. Elevated blood pressure is not typically an initial assessment finding in acute renal failure. In fact, it is more common to see low blood pressure (hypotension) due to decreased blood flow to the kidneys.

B. Correct. One of the hallmark manifestations of acute renal failure is decreased urine output (oliguriA. or even no urine output (anuriA. . This is often accompanied by low blood pressure as a result of decreased kidney function.

C. Incorrect. Acute renal failure usually leads to changes in blood pressure and urine output. Stable blood pressure and urine output are not typical initial assessment findings in this condition.

D. Incorrect. High blood sugar levels and frequent urination are not directly related to acute renal failure. These symptoms are more characteristic of diabetes mellitus.