Guide — Neurology
Spinal Cord Injury & Autonomic Dysreflexia Nursing Care
A spinal cord injury severs the line between brain and body below the level of damage — and the higher the injury, the more it takes, all the way up to the breath. The signature emergency, autonomic dysreflexia, turns a full bladder into a stroke-level blood pressure: recognizing it in seconds is the skill that saves lives.
10 min read · Neurology
Educational use only. Acute SCI management (immobilization, surgical decompression, hemodynamic targets) follows trauma and spine-service protocols. Autonomic dysreflexia is a true emergency — act on the steps below and escalate immediately. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
Overview
Spinal cord injury (SCI) disrupts motor, sensory, and autonomic signals below the level of the lesion. The level and completeness of the injury predict function: cervical injuries affect all four limbs (tetraplegia/quadriplegia), thoracic and below affect the trunk and legs (paraplegia). The higher the cervical level, the more is lost — and injuries above roughly C3–C5 (“C3, 4, 5 keep the diaphragm alive”) threaten the ability to breathe.
Two early autonomic problems and one chronic one dominate nursing care: spinal shock and neurogenic shock in the acute phase, and autonomic dysreflexia once the cord stabilizes in higher injuries.
Key Concepts
Level predicts function
Higher cervical injuries mean ventilator dependence and minimal limb function; mid/low cervical preserves more arm function; thoracic injuries spare the arms; lumbar injuries affect the legs and bowel/bladder. Knowing the level tells you what to protect, what to rehabilitate, and what complications to expect (e.g., respiratory in cervical, autonomic dysreflexia at/above T6).
Spinal shock vs neurogenic shock
Spinal shock is a temporary, total loss of function below the injury — flaccid paralysis, absent reflexes, no sensation — that can last days to weeks; its resolution (return of reflexes) lets true function be assessed. Neurogenic shock is a distributive shock from loss of sympathetic tone in injuries (typically above T6): the classic triad is hypotension, bradycardia, and warm/dry skin — the opposite of hypovolemic shock’s fast, clamped-down response. Treat with fluids, vasopressors, and atropine for bradycardia as ordered.
Autonomic dysreflexia — the emergency
In injuries at or above T6, after spinal shock resolves, a noxious stimulus below the injury triggers a massive unopposed sympathetic surge: sudden severe hypertension, pounding headache, flushing and sweating ABOVE the injury, and bradycardia, with pallor/goosebumps below. Untreated, the blood pressure can cause seizures, stroke, or death. It is one of nursing’s true bedside emergencies.
The dysreflexia triggers — almost always below the injury
The classic cause is a full bladder (kinked catheter, blocked drainage, distension), followed by bowel impaction, then skin issues (pressure injury, tight clothing, ingrown nail) and other noxious stimuli. Find and remove the trigger and the crisis resolves.
Assessment Findings
Acute SCI: airway and breathing first (cervical injuries), then motor/sensory level (and changes — ascending deficit is an emergency), and the shock picture (distinguish neurogenic from hemorrhagic in trauma). Maintain immobilization until cleared. Ongoing: respiratory status and secretion clearance, skin over every pressure point, bowel and bladder programs, VTE and orthostatic risk, spasticity, and psychological state. For autonomic dysreflexia: a sudden spike in blood pressure with a pounding headache in an at-risk patient is the alarm — a “normal” BP for a high-SCI patient is often low, so a reading that looks normal-to-high may actually be dangerously elevated for them.
Nursing Priorities
Respond to autonomic dysreflexia immediately
The sequence: (1) sit the patient UP (high Fowler’s) to drop BP with orthostasis; (2) loosen tight clothing/constriction; (3) find and remove the trigger — check the catheter for kinks/blockage and drain a full bladder, check for bowel impaction (with anesthetic jelly), inspect skin; (4) monitor BP every few minutes and give a rapid-acting antihypertensive per order if it stays high; and call for help. Treating the bladder usually ends it.
Prevent the triggers in the first place
Faithful bladder program (scheduled catheterization, patent drainage), bowel program (regular, prevent impaction), meticulous skin care and turning, and avoiding tight clothing or restrictive devices — prevention is the long-term management of dysreflexia.
Protect the airway and prevent immobility complications
For cervical injuries, monitor respiratory function and support cough/secretions; for all, prevent VTE, pressure injuries, contractures, and orthostatic intolerance, and manage neurogenic bowel/bladder, spasticity, and pain.
Support rehabilitation and adjustment
Engage rehab early, promote maximal independence and adaptive techniques, and support the profound psychological adjustment to a changed body and life — depression and grief are expected and treatable.
Therapeutic Communication Considerations
SCI often strikes young, active people suddenly, and the loss is total and visible. Allow grief without rushing to silver linings, support autonomy in every decision the patient can still control, and involve them in their own care planning from the start. Teach the patient and family to be experts in autonomic dysreflexia — for a person with a high injury, recognizing and treating it is a life skill, not just a nursing task. Respect the expertise patients develop about their own bodies and routines.
Patient & Family Education
For at-risk (T6 and above) patients and families, drill autonomic dysreflexia: the warning signs (sudden pounding headache, flushing, sweating, a BP spike), the immediate response (sit up, loosen clothing, check the bladder and bowel first), carrying a medical-alert card and an AD wallet card, and when to call 911. Teach the bladder and bowel programs that prevent it, daily skin checks and pressure-injury prevention, respiratory care for high injuries, VTE and orthostatic precautions, spasticity management, and the rehab plan. Reinforce keeping catheters patent and bowels regular as the front line of dysreflexia prevention, and connect with SCI peer support and rehabilitation resources.
NCLEX Pearls
- ✦Autonomic dysreflexia (injury ≥ T6): sudden severe hypertension + pounding headache + flushing/sweating above the injury + bradycardia. It’s an emergency.
- ✦AD response order: SIT THE PATIENT UP → loosen clothing → find/remove the trigger (check the bladder/catheter FIRST, then bowel) → antihypertensive if BP stays high.
- ✦The #1 AD trigger is a full/blocked bladder; #2 is bowel impaction. The stimulus is below the injury.
- ✦Neurogenic shock = hypotension + BRADYcardia + warm/dry skin (lost sympathetic tone) — opposite of hypovolemic shock.
- ✦Spinal shock is temporary total loss of function below the injury; “C3, 4, 5 keep the diaphragm alive” — injuries above this threaten breathing.
Related Resources
Standards & sources
Fact-checked Jun 21, 2026This page is written to align with American Heart Association / American Stroke Association (AHA/ASA) · American Association of Neuroscience Nurses (AANN). It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →