Which finding best indicates hypovolemic shock in a patient with spinal cord injury?

Which finding best indicates hypovolemic shock in a patient with spinal cord injury?

• A. Blood pooling in the extremities
• B. Increase in the release of cortisol
• C. Alpha 1 stimulation
• D. Associated closed head trauma

Answer: (A)

The key idea is that hypovolemic shock comes from a loss of intravascular volume, which reduces the amount of blood returning to the heart and central organs. When blood pools in the extremities, a large portion is effectively kept away from the central circulation, signaling this reduced circulating volume. In a patient with spinal cord injury, autonomic control can be disrupted, but the presence of peripheral venous pooling still points toward hypovolemia as the driver of shock rather than a primary loss of tone from neurogenic causes. The other options aren’t direct indicators of low circulating volume: a generalized rise in cortisol is a nonspecific stress response; alpha-1 stimulation would cause vasoconstriction and is a compensatory mechanism rather than a sign of volume loss; associated head trauma is a separate injury, not a marker of the body's volume status.

The key idea is that hypovolemic shock comes from a loss of intravascular volume, which reduces the amount of blood returning to the heart and central organs. When blood pools in the extremities, a large portion is effectively kept away from the central circulation, signaling this reduced circulating volume. In a patient with spinal cord injury, autonomic control can be disrupted, but the presence of peripheral venous pooling still points toward hypovolemia as the driver of shock rather than a primary loss of tone from neurogenic causes. The other options aren’t direct indicators of low circulating volume: a generalized rise in cortisol is a nonspecific stress response; alpha-1 stimulation would cause vasoconstriction and is a compensatory mechanism rather than a sign of volume loss; associated head trauma is a separate injury, not a marker of the body's volume status.