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. Hypotension and tachycardia are more commonly associated with fluid depletion, not fluid overload.

B. Incorrect. Dry mucous membranes and decreased skin turgor are signs of dehydration, which is not indicative of fluid overload.

C. Correct. Fluid overload in acute renal failure can lead to pulmonary congestion and edema in the extremities. Crackles in the lungs (rales) are auscultated when there is fluid accumulation in the lung tissue, and edema in the extremities is visible swelling caused by excessive fluid retention.

D. Incorrect. Hypoactive bowel sounds and constipation are not directly related to fluid overload in acute renal failure.

A. Incorrect. Unlike computed tomography (CT) scans, MRI scans do not typically require the ingestion of a contrast solution.

B. Incorrect. The MRI scan does not directly measure the glomerular filtration rate (GFR), which is typically assessed through blood tests.

C. Incorrect. A renal biopsy involves inserting a needle through the back to obtain a tissue sample from the kidneys, not an MRI scan.

D. Correct. Before an MRI scan, clients need to remove all metal objects and devices, including jewelry, piercings, hearing aids, and certain medical implants. Metal can interfere with the MRI's magnetic field and cause safety concerns during the procedure.