Reading the injury level
Many spinal cord injury questions can be answered simply by knowing what function is preserved at a given level. The higher the injury, the more function is lost, and the exam expects you to translate a level into practical implications for breathing, self-care and safety.
The critical respiratory landmark is the phrenic nerve, which arises from C3 to C5 and supplies the diaphragm. Injuries at or above C4 typically require mechanical ventilation, which is why a stem describing a C3 injury and an option about airway support is almost always the priority. Injuries at C6 to C7 preserve enough arm and wrist function for many self-care activities with adaptive devices. Thoracic injuries preserve arm function entirely and produce paraplegia; lumbar and sacral injuries affect hips, legs, bladder and bowel to varying degrees.
Complete versus incomplete matters too. A complete injury means no motor or sensory function below the level; an incomplete injury preserves some. Exam stems often specify this because it changes rehabilitation goals and the realistic expectations you should reinforce in client teaching.
| Level | Key implication |
|---|---|
| C1–C3 | Ventilator dependent, needs total care |
| C4 | Diaphragm marginal, often requires ventilatory support |
| C5 | Can flex elbows, needs assistance with most self-care |
| C6–C7 | Wrist and some hand function, largely independent with devices |
| T1–T6 | Full arm function, paraplegia, dysreflexia risk |
| T6 and below | Improving trunk control; below T6 dysreflexia risk falls sharply |
| L1–S5 | Variable leg, bladder and bowel involvement |
Spinal shock versus neurogenic shock
These two terms describe different phenomena that often occur together, and exam items exploit the confusion. Spinal shock is a neurological event: immediately after injury, all reflex activity below the level of the lesion is temporarily lost, producing flaccid paralysis, absent reflexes and loss of sensation. It can last days to weeks, and its resolution is signalled by the return of reflexes, often as spasticity.
Neurogenic shock is a circulatory event caused by loss of sympathetic tone, usually with injuries at T6 or above. Vasodilation drops blood pressure while unopposed vagal tone slows the heart, producing the distinctive combination of hypotension with bradycardia and warm, dry, flushed skin. This is the opposite of hypovolaemic shock, where the client is tachycardic with cool, clammy skin — a discrimination the NCLEX tests directly.
Management of neurogenic shock centres on cautious fluid resuscitation, vasopressors to restore vascular tone, and atropine for symptomatic bradycardia. Flooding the client with fluids alone risks pulmonary oedema because the problem is distribution, not volume.
- •Hypotension + bradycardia + warm dry skin = neurogenic shock
- •Hypotension + tachycardia + cool clammy skin = hypovolaemic shock
- •Flaccid paralysis with absent reflexes early after injury = spinal shock
- •Return of reflexes and spasticity = spinal shock resolving
Autonomic dysreflexia: the emergency item
Autonomic dysreflexia is the most frequently tested spinal cord injury emergency, and the question almost always asks for the first nursing action. It occurs in clients with injuries at T6 or above, after spinal shock has resolved, when a noxious stimulus below the level of injury triggers an unopposed sympathetic surge.
The presentation is characteristic: sudden severe hypertension, a pounding headache, bradycardia, flushing and profuse sweating above the level of injury, with pale, cool, goose-fleshed skin below it, plus nasal congestion and blurred vision. Untreated, the hypertension can cause seizures, stroke or death, which is why this is an act-first scenario rather than an assess-first one.
The correct sequence begins with sitting the client upright or raising the head of the bed to use gravity to lower blood pressure, then loosening constrictive clothing and devices, then identifying and removing the trigger. Check the urinary catheter for kinks or check for bladder distension first because a full bladder causes the majority of episodes; faecal impaction is the second most common cause. Antihypertensive medication is given if the pressure remains dangerously high after the trigger is removed, and blood pressure is monitored every few minutes throughout.
- •1. Raise the head of the bed / sit the client upright
- •2. Loosen tight clothing, binders and leg bags
- •3. Check for bladder distension or a kinked catheter
- •4. Check for faecal impaction, using anaesthetic lubricant if disimpacting
- •5. Give prescribed antihypertensive if pressure stays elevated
- •6. Monitor blood pressure every 2–5 minutes and document
Long-term management and teaching
Beyond the acute phase, spinal cord injury questions focus on prevention. Skin breakdown is prevented by pressure redistribution surfaces, repositioning schedules, and teaching clients who use wheelchairs to perform pressure lifts every 15 to 30 minutes. Deep vein thrombosis prophylaxis is standard because immobility and loss of muscle pump increase risk. Orthostatic hypotension is managed by changing position gradually, using abdominal binders and compression stockings.
Bladder programmes usually involve intermittent catheterization on a schedule, which both prevents distension and reduces infection risk compared with indwelling catheters. Bowel programmes rely on a consistent time each day, adequate fibre and fluids, stool softeners and suppositories or digital stimulation. Both programmes double as dysreflexia prevention, and teaching that connection is a favourite exam point.
Psychosocial content is examinable too. Grief, altered body image, changes in sexual function and role adjustment are expected, and correct answers acknowledge feelings and involve rehabilitation and peer support rather than offering false reassurance.