Which parameter is most useful in differentiating hemorrhagic shock from neurogenic shock in the prehospital setting?

• A. Abdomen tenderness
• B. Blood pressure reading
• C. Neurologic status
• D. Skin findings

Answer: (D)

Skin findings reflect how blood is being distributed and how the autonomic system is functioning, which differs between hemorrhagic and neurogenic shock. In hemorrhagic shock from blood loss, the body shunts blood to core organs, causing vasoconstriction of the skin vessels and resulting in cool, clammy skin. In neurogenic shock, loss of sympathetic tone leads to widespread vasodilation and warm, dry skin. This contrast makes skin observations the most useful clue in the field to distinguish between the two. Abdominal tenderness can point to bleeding but doesn’t reliably differentiate the shock type; blood pressure can be low in both, and neurologic status may be affected by injury but isn’t a specific discriminator.