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Spinal-cord injury level and neurogenic shock

Essential points for quick revision.

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Cord injury with respiratory or circulatory failure

High cervical injury can cause ventilatory collapse, while loss of sympathetic tone causes hypotension and bradycardia; occult haemorrhage remains common and must not be missed.

Action: Run ABCDE with spinal protection, support ventilation early, control and exclude bleeding, document motor, sensory and sacral findings, obtain CT then urgent MRI for cord neurology, and use specialist critical-care vasopressor support only after adequate volume and haemorrhage management.

Synopsis

Localise acute spinal-cord injury, distinguish neurogenic from haemorrhagic shock, protect respiratory and cord perfusion, and communicate a reproducible neurological level and completeness assessment.

  • Protect alignment while prioritising airway and breathing; high cervical injury can retain a normal early saturation despite falling ventilation and ineffective cough.
  • Document a structured motor and sensory examination, including perianal sensation, deep anal pressure and voluntary anal contraction when clinically appropriate to determine sacral sparing.
  • The neurological level is the most caudal segment with normal sensory and antigravity motor function under the ISNCSCI method; do not infer it from one weak limb.

Key red flags

Diaphragmatic breathing, weak cough, falling vital capacity, hypercapnia or high cervical weakness requires early anaesthetic and critical-care support before oxygen saturation falls.

Investigation priorities

01
First-line structured neurological examinationFirst stepFirst line

Localise level, completeness and change over time.

02
Preferred CT spinePreferred

Define fracture, translation, canal bone and alignment rapidly.

Management branches

ImmediateProtect cord and ventilation

Trauma produces weakness, sensory level, sacral change or high-risk spinal pain.

  1. Run ABCDE with coordinated spinal protection, give oxygen when required and call anaesthetic support for weak cough, hypoventilation or high cervical injury.
  2. Document a structured motor, sensory and sacral examination before and after transfers or reduction whenever feasible.

Key medicines

Noradrenaline infusion for selected neurogenic shockStart only in a monitored critical-care setting after adequate volume and haemorrhage control, using the local standard concentration and titrating the intravenous infusion to the spinal-team perfusion target; there is no single safe fixed trauma dose.
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Sources and review status3 sources · checked 27 Aug 2026 · clinical review pending
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 27 Aug 2026; clinical approval remains outstanding.

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom