Question 1 · Medium
On the first day after a spinal cord injury at T2, a man has a blood pressure of 78/40 mmHg, a heart rate of 48 per minute and warm, dry skin below the lesion. Which condition explains this?
- ASpinal shock alone, with no circulatory effect
- BHypovolaemic shock from bleeding
- CNeurogenic shock
- DAutonomic dysreflexia
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Answer: C · Neurogenic shock
Injury above about T6 can cut sympathetic outflow, so vascular tone falls and the unopposed vagus slows the heart. The result is hypotension with bradycardia and warm, vasodilated skin. Haemorrhagic shock, by contrast, causes tachycardia and cold, pale skin. Spinal shock describes the temporary loss of reflexes below the lesion.
- A: Spinal shock is loss of reflexes; it does not explain the circulatory picture.
- B: Bleeding causes a fast heart rate and cold, pale skin.
- D: Autonomic dysreflexia causes severe hypertension, not hypotension.
Remember this
Neurogenic shock: hypotension with bradycardia and warm skin after a high cord injury.