The nurse is performing an admission assessment for a client with pyelonephritis who has urgency and burning while urinating. Which finding indicates an expected response when the nurse percusses the costovertebral angle?

Choice A Reason: Audible thud without pain is incorrect. An audible thud without pain would not be an expected response when percussing the costovertebral angle (CVA) in a client with pyelonephritis. Pyelonephritis typically presents with tenderness upon percussion of the CVA due to inflammation or infection of the kidneys. The absence of pain in this scenario would not be consistent with the expected response. Choice B Reason: Rigidity and firmness are incorrect. Rigidity and firmness upon percussion of the costovertebral angle (CVA) may suggest muscle tension or guarding, rather than the tenderness typically associated with kidney inflammation or infection such as pyelonephritis. While guarding can occur in response to pain, it is not the expected response when assessing for kidney tenderness. Choice C Reason: Rebound tenderness is incorrect. Rebound tenderness refers to the exacerbation of pain upon release of pressure, typically observed in conditions such as peritonitis. While rebound tenderness may be present in some abdominal conditions, it is not the expected response when percussing the costovertebral angle (CVA) to assess for kidney tenderness in pyelonephritis. In pyelonephritis, tenderness upon initial percussion is more indicative of the condition. Choice D Reason: Sharp, severe pain is correct. Sharp, severe pain upon percussing the CVA suggests tenderness, which can be indicative of kidney inflammation or infection, such as pyelonephritis. This finding would support the diagnosis and help guide further assessment and treatment.