A nurse is collecting data for a middle aged client who has pyelonephritis. Which of the following finding should the nurse expect?

A. Pyelonephritis is an infection of the renal pelvis and kidney tissue, which commonly causes flank pain or tenderness, often on the affected side. This pain may be sharp, dull, or colicky and is often accompanied by systemic signs of infection such as fever, chills, and malaise. B. While severe infections or sepsis can eventually lead to hypotension, middle-aged clients with uncomplicated pyelonephritis usually maintain normal blood pressure. Hypotension is not an expected early finding of pyelonephritis. C. Confusion is more commonly seen in older adults with urinary tract infections due to altered mental status from age-related brain changes or systemic infection. A middle-aged client is less likely to present with confusion as a primary symptom. D. Weight gain is not associated with pyelonephritis. Fluid retention or weight changes may occur in chronic kidney disease or nephrotic syndrome, but acute kidney infections generally do not cause weight gain.