Which finding is most consistent with early poor perfusion in trauma?

• A. Decreased urine output
• B. Warm, flushed skin
• C. Altered mental status
• D. Rapid capillary refill

Answer: (C)

Early in trauma-related poor perfusion, the brain is especially sensitive to reduced blood flow, so changes in mental status are among the first reliable indicators of hypoperfusion. As perfusion to the brain decreases, you’ll often see confusion, agitation, anxiety, or altered responsiveness even before other organs show obvious signs. Decreased urine output signals that renal perfusion is dropping, but this tends to occur later as shock progresses. Warm, flushed skin suggests vasodilation such as in distributive shock, not the cold, clammy skin typical of hypovolemia from trauma. Capillary refill can be a sign of poor perfusion, but it is less reliable in adults and can be influenced by temperature and other factors, so it’s not as specific for early cerebral hypoperfusion.