The nurse plans to assess an adult client's kidneys for tenderness. The nurse should assess the area at the

Assessment of renal inflammation involves percussing the costovertebral angle (CVA) to elicit response from the renal capsule. Tenderness in this region, known as Murphy's punch sign, typically indicates pyelonephritis or nephrolithiasis. The kidneys are retroperitoneal organs located between T12 and L3 vertebrae. Rationale: A. The right upper quadrant primarily contains the liver, gallbladder, and duodenum. While the upper pole of the right kidney resides deep within this region, standard assessment for renal tenderness is performed posteriorly to avoid interference from overlying peritoneum and thick abdominal musculature. B. The external oblique angle refers to the lateral abdominal muscles rather than a specific anatomical landmark for organ palpation. Assessing this area would not provide direct access to the retroperitoneal space where renal parenchyma and the surrounding capsule are situated for physical examination. C. The left upper quadrant houses the stomach, spleen, and pancreas. Although the left kidney is located in this general vicinity, anterior palpation is often obscured by the splenic flexure of the colon. Posterior percussion is the standardized clinical method to identify localized renal distress. D. The costovertebral angle is formed by the intersection of the 12th rib and the vertebral column. Blunt percussion here transmits vibration directly to the renal capsule. Sharp pain upon percussion in this specific landmark is a classic diagnostic finding for acute inflammatory renal conditions.