A nurse is assessing a 7-year-old who has been diagnosed with acute pyelonephritis, what assessment finding requires immediate action by the nurse?

A. Hypertension (blood pressure of 136/92 mm Hg) in a child with acute pyelonephritis can indicate a severe condition that may lead to renal damage or worsening kidney function. Immediate intervention is necessary to manage high blood pressure and prevent complications. B. A heart rate of 100 bpm is within normal limits for a 7-year-old and does not require immediate action. C. Decreased urine output is concerning and needs monitoring, but hypertension is the more urgent issue. D. Tea-colored urine suggests hematuria or concentrated urine, which is important but not as immediately life-threatening as high blood pressure.