Hurst Readiness Exam 2 Practice

Rising BUN indicates the kidneys aren’t filtering waste effectively, which is a key sign of acute kidney injury or declining renal perfusion after trauma. BUN tends to rise earlier than creatinine in acute changes to kidney function, so a gradual increase in BUN is a timely red flag that needs immediate assessment and intervention.

The other findings are less concerning in this context: creatinine being normal can occur early in kidney injury, but it doesn’t rule out evolving impairment; urine output of 150 mL/hour shows adequate urine production, suggesting perfusion is still sufficient at the moment; and a normal calcium level doesn’t point to an acute renal issue by itself.