A nurse is caring for a client who has a gastrointestinal (GI) bleed. Which of the following findings is the priority for the nurse to report to the provider?

A. Urine output of 50 mL in 2 hr: This indicates possible hypovolemia or early shock from blood loss. Low urine output is a sign of impaired perfusion and requires immediate intervention to prevent organ failure. B. BUN 21 mg/Dl: Elevated BUN can indicate dehydration or GI bleeding, but it is not as immediately critical as a clinical sign of shock. Monitoring trends is important, but it is not the first priority. C. Positive fecal occult blood test: This confirms the presence of blood in the stool but is not an acute change; it is diagnostic rather than an emergency sign. D. 75 mL coffee ground emesis: Indicates slow upper GI bleeding; while concerning, hemodynamic instability (like low urine output) takes priority over volume or appearance of vomitus.