Quick Recap
This completes the Trauma System - all 8 protocols now have Quick Recap sections.
Trauma System, Protocol 8/8 — completing the Trauma System. Built on ATLS 11th Edition (2023). Cross-references the Neurogenic/Spinal component of the Distributive Shock protocol (Cardiovascular System) and the Traumatic Brain Injury protocol's concurrent-spine-injury section (Neurology System).
1. Epidemiology
Injuries occur at the areas of highest spinal mobility — cervical injuries account for >50% of all SCI cases. C3-C7 is the most vulnerable segment: 65% of fractures and 75% of dislocations occur here. Cervical spine injuries carry HIGHER mortality/morbidity than thoracic or lumbar injuries. Motor vehicle crashes and falls are the two leading causes; gunshot wounds are now the THIRD most common cause as the firearm injury public health burden has grown. Traumatic brain injury occurs concomitantly in up to HALF of SCI patients, and a similar proportion have injuries to other organs — SCI is rarely an isolated finding.
2. Neurogenic Shock vs Spinal Shock — Two Distinct, Frequently Confused Entities
Neurogenic shock (a hemodynamic/circulatory diagnosis): DISTRIBUTIVE shock from loss of vasomotor tone and cardiac sympathetic innervation when cord injury occurs ABOVE T6 — sympathetic chain interruption -> unopposed vagal tone -> hypotension AND bradycardia with WARM, DRY skin (a key discriminator from hemorrhagic shock, which produces cool, clammy skin with compensatory tachycardia). Higher (more cranial) and more complete SCI produces more severe/refractory shock. Cardiovascular effects can develop within HOURS TO DAYS of injury and may LAST 1-3 WEEKS.
Spinal shock (a neurologic diagnosis — the term is a MISNOMER with NO relation to hemodynamic instability): transient loss of muscle tone and AREFLEXIA distal to the anatomic lesion, occurring IMMEDIATELY after SCI. Present in ALMOST 50% of cord trauma victims. Can persist DAYS to a WEEK, prolonged by sepsis or critical illness polyneuropathy. Resolution is signaled by RETURN of the plantar or bulbocavernosus reflex (reflexes distal to the injury level recover first) — a useful bedside marker for tracking the transition out of spinal shock.
Do not confuse these two terms clinically — neurogenic shock is a hemodynamic emergency requiring resuscitation; spinal shock is a neurologic examination phenomenon that affects how reliably you can grade injury completeness during this window.
3. Immediate Stabilization (ABCDE)
Circulation — Neurogenic Shock Management:
- In a hemodynamically abnormal patient with SCI findings, ACTIVELY EXCLUDE HEMORRHAGIC SHOCK before attributing hypotension to neurogenic shock alone — both can coexist depending on mechanism (e.g., polytrauma with both SCI and solid organ injury); ensure adequate hemorrhage control is confirmed while separately managing the neurogenic component
- Initial resuscitation: isotonic crystalloid volume, generally considered safe/beneficial in the ABSENCE of concurrent bleeding
- Blood pressure goal: MAP >=85 mmHg during resuscitation when isolated neurogenic shock signs are present — hypotension is detrimental to neurologic recovery, so this higher target (compared to standard shock resuscitation goals) reflects the priority of maintaining spinal cord perfusion pressure
- Vasopressors added if volume alone fails to reach the resuscitation goal:
- Norepinephrine: an option for injuries at ANY spinal level — has both alpha-1 AND beta-1 activity, improving peripheral vasoconstriction, heart rate, AND contractility simultaneously
- Phenylephrine: an option for SCI BELOW T6 specifically — lacks beta-1 activity, so it can EXACERBATE bradycardia in HIGHER-level spine injuries — avoid in high cervical/upper thoracic injury where bradycardia is already a concern
- Vasopressors are typically given via CENTRAL access given infusion-site adverse effect risk, though peripheral IV administration is acceptable in emergencies until central access is obtained
Disability — Neurologic Assessment:
- Assume changes in level of consciousness are due to TRAUMATIC INJURY until proven otherwise, even though hypoglycemia, alcohol, and drugs can also alter consciousness
- Perform GCS, pupillary assessment, and gross motor evaluation for spinal cord injury as part of the primary survey disability assessment
- Full detailed neurologic exam (myotome/dermatome/rectal) is deferred to the secondary survey (Section 4)
Spinal Motion Restriction (SMR) — Updated Terminology and Technique:
- "Spinal motion restriction" is the preferred term over "spinal immobilization" — current techniques cannot achieve COMPLETE immobilization, and the terminology shift reflects this more accurate, honest framing
- SMR is applied to the WHOLE spine given high risk of noncontiguous injuries (not just the suspected injury level)
- Achieved via cervical collar (correctly SIZED), backboard (BRIEF periods only, NOT for long transfers), scoop stretcher, vacuum splint, or neutral alignment on a cot/stretcher
- SMR is NOT performed in the sitting position
- Transfer between surfaces performed carefully using a long spine board, scoop stretcher, or vacuum mattress as a transfer tool (not for prolonged use)
- Immobilization itself carries real risks that must be weighed: worsening intracranial hypertension, airway compromise, diminished chest wall mobility, pressure sores, pain — SMR is not a risk-free intervention and should be applied thoughtfully, not reflexively prolonged
Checklist:
4. Secondary Survey — Detailed Neurologic Exam and ASIA Classification
Myotome strength grading: 0 (paralysis) to 5 (normal strength), assessed at each spinal level.
Rectal exam and spinal reflex evaluation: the presence of rectal tone and sensation may be the ONLY manifestation of neurologic function caudal to the injury level — this reclassifies the injury from "complete" to "incomplete," carrying significant prognostic value and potentially altering management. Test for the bulbocavernosus reflex. Priapism may be seen, most commonly in COMPLETE cervical SCI.
ASIA (American Spinal Injury Association) score / International Standards for Neurological Classification of SCI: the accepted standard for assigning injury level and grade, via standardized myotome, dermatome, and rectal tone examination.
Key dermatome landmarks: C5 (deltoid), C6 (thumb), C7 (middle finger), C8 (little finger), T4 (nipple line), T8 (xiphoid), T10 (umbilicus), T12 (pubic symphysis), L4 (medial calf), L5 (web space between 1st/2nd toes), S1 (lateral foot border), S3 (ischial tuberosity), S4/S5 (perianal region).
Incomplete SCI carries a more favorable prognosis than complete SCI.
5. SCI Syndromes (Incomplete Injury Patterns)
Syndrome | Pattern |
Central cord syndrome | 15-25% of ALL SCI (the most common incomplete pattern); associated with CERVICAL HYPEREXTENSION in patients with pre-existing spinal stenosis — more common in OLDER patients; motor deficits DISPROPORTIONATELY affect UPPER extremities vs lower; variable sensory impairment and bladder/bowel dysfunction |
Brown-Sequard syndrome | Uncommon (~4% of SCI); typically from penetrating injury (gunshot/knife) to ONE side of the cord; ipsilateral loss of motor and proprioception/vibration; CONTRALATERAL loss of pain and temperature |
Ventral (anterior) cord syndrome | Rare post-trauma, usually vascular; loss of motor and ALL sensory modalities EXCEPT proprioception/vibration |
Dorsal (posterior) cord syndrome | Rare post-trauma, usually vascular; motor and pain/temperature USUALLY preserved; loss of proprioception/vibration |
Cauda equina syndrome | Extremely painful, ASYMMETRIC, LOWER motor neuron findings, LATE urinary retention |
Conus medullaris syndrome | LESS painful, SYMMETRIC, MIXED upper/lower motor neuron findings, EARLY urinary retention |
The cauda equina vs conus medullaris distinction (pain symmetry, timing of urinary retention, motor neuron pattern) is clinically useful for localizing the injury level and anticipating trajectory.
6. Imaging
Spine stability assessed with multiple-view plain films, CT, and OFTEN MRI (specifically to evaluate LIGAMENTOUS injury not visible on CT) to guide surgical intervention or external stabilization (collar/device) decisions. Imaging modality choice is dictated by mechanism and clinical suspicion level.
7. Neuroprotection — An Explicit Non-Recommendation
There are NO proven neuroprotective agents for SCI. High-dose methylprednisolone infusion was historically common but is NO LONGER routinely recommended given an unfavorable risk-benefit profile (infection, GI bleeding, and other steroid-related complications without clearly established neurologic benefit) — this represents a significant, deliberate shift away from older teaching; do not reflexively administer high-dose steroids for acute SCI as if it remains standard of care.
8. Penetrating Spinal Injury — Distinct Management Considerations
Most penetrating SCIs result in a COMPLETE (ASIA A) injury — a different baseline expectation than blunt SCI, where incomplete injuries are more common. May be associated with significant arterial and other life-threatening injuries given the penetrating mechanism's broader tissue involvement.
MRI may NOT be possible due to retained ferrous metallic fragments — an important practical imaging limitation specific to this mechanism.
Prophylactic antibiotics, if given, should be SHORT duration except for extensively contaminated wounds — supporting evidence for infection prevention is WEAK.
Surgical exploration is sometimes performed for an INCOMPLETE SCI (ASIA B or better) with PROGRESSIVE neurologic decline or projectile fragment MIGRATION — many penetrating injuries are successfully managed WITHOUT surgical exploration.
Spinal column instability is RARELY present following civilian penetrating spinal injuries (distinct from blunt mechanism, where instability is a central concern).
Blast effect can cause significant spinal cord dysfunction WITHOUT the projectile passing directly through the spinal canal — consider this indirect mechanism in blast-associated presentations.
9. Concurrent Traumatic Brain Injury and Blunt Cardiac Injury
Given the high concomitant TBI rate (up to 50%), apply the TBI protocol's ICP/CPP management framework in parallel when both injuries coexist (see Traumatic Brain Injury protocol, Neurology System) — note that protocol's specific MAP >=85 target for concurrent spinal cord perfusion, maintained for 72 hours up to 7 days post-injury in blunt/incomplete penetrating SCI, aligning with this protocol's neurogenic shock resuscitation goal.
Blunt cardiac injury (BCI) can co-occur in high-energy trauma affecting the chest/spine — abnormal ECG or arrhythmia on monitor warrants 24-48h cardiac monitoring; normal ECG + normal troponin allows safe discharge from a cardiac-injury standpoint (though this will miss rare delayed injuries like septal rupture); ST elevation suggests contusion or MI (consider coronary injury) — angiography/angioplasty/surgery as indicated; complete heart block may need temporary/permanent pacing.
10. ICU Management Considerations
Systemic complications of SCI often necessitate ICU-level care beyond the acute injury itself: neurogenic shock hemodynamic management (Section 3), respiratory compromise (especially high cervical injury affecting diaphragmatic function — see the Traumatic Brain Injury protocol's note on early intubation for C1-C5 injuries), autonomic dysreflexia risk in established injuries (see the general Distributive Shock protocol's neurogenic/spinal shock section, Cardiovascular System, for the trigger-removal-first management principle), bladder/bowel dysfunction, DVT/VTE risk (SCI is a recognized hypercoagulable-risk condition), pressure injury risk from reduced mobility/sensation, and temperature dysregulation (poikilothermia) with higher-level injuries.
Log-roll precautions and neck extension limitations from spine instability directly affect airway management planning — coordinate closely with the surgical/spine team on mobility restrictions before any procedure requiring positioning changes.
11. Organ Support
Neurogenic shock resuscitation (crystalloid + norepinephrine/phenylephrine per injury level) targeting MAP >=85; respiratory support per injury level (early intubation for high cervical injury); DVT prophylaxis; standard ICU supportive care; concurrent TBI management per the dedicated protocol if present; bladder/bowel management program initiation.
12. Consultation Matrix
Consultation | Trigger | Timing |
Neurosurgery/Spine Surgery | All confirmed/suspected SCI | Immediate |
Trauma Surgery | Concurrent polytrauma | Immediate |
Cardiology | Blunt cardiac injury with abnormal ECG/arrhythmia | As indicated |
Rehabilitation Medicine | All SCI, given long-term functional implications | Early, proactive |
13. Monitoring Framework
Continuous hemodynamic monitoring through the neurogenic shock window (hours to 1-3 weeks), serial neurologic exam (ASIA reassessment, bulbocavernosus/plantar reflex return tracking for spinal shock resolution), respiratory status (especially high cervical injury), cardiac monitoring if BCI suspected, DVT surveillance, temperature monitoring (poikilothermia risk).
14. Complications
Neurogenic shock-related hemodynamic instability, secondary cord injury from hypotension or improper positioning/immobilization, respiratory failure (high cervical injury), autonomic dysreflexia (established injury), DVT/PE, pressure injury, blunt cardiac injury arrhythmia, immobilization-related complications (pressure sores, airway compromise from prolonged collar/backboard use). Prevention: MAP >=85 target maintenance, correctly applied and time-limited SMR, level-appropriate vasopressor selection, early respiratory support anticipation for high cervical injury, DVT prophylaxis. Rescue: standard neurogenic shock escalation, surgical decompression/stabilization per spine surgery, standard arrhythmia/BCI management.
15. Escalation & De-escalation
Escalate: hemodynamic instability not resolving with volume + appropriate vasopressor -> reassess for concurrent hemorrhagic shock, escalate vasopressor support; progressive neurologic decline (especially penetrating injury) -> surgical exploration/decompression.
De-escalate: neurogenic shock resolving (typically within 1-3 weeks), spinal shock resolving (reflex return), hemodynamically stable off vasopressors -> liberalize MAP target toward standard goals, transition to rehabilitation-focused care.
16. ICU Discharge Criteria
Hemodynamically stable off vasopressors, respiratory status stable (or on an established tracheostomy/ventilator-dependence trajectory for high cervical injury), ASIA classification established, surgical stabilization completed or definitive nonoperative plan in place, bladder/bowel management program initiated, DVT prophylaxis in place, rehabilitation planning underway.
17. Documentation & Medicolegal Checklist
18. Key Guidelines
American College of Surgeons. Advanced Trauma Life Support, 11th Edition Course Manual, 2023 (Chapter 7: Disability — Neurological Assessment and Management). Kirshblum S, Snider B, Rupp R, Read MS; International Standards Committee of ASIA and ISCoS. Updates of the International Standards for Neurologic Classification of Spinal Cord Injury: 2015 and 2019. Phys Med Rehabil Clin N Am. 2020;31(3):319-330.
19. Controversies
The complete abandonment of high-dose methylprednisolone for acute SCI, while now well-supported, represents a significant departure from decades of prior standard practice, and residual practice variation exists in some settings still influenced by older training. Optimal MAP target duration (72h vs up to 7 days, per the TBI protocol's cross-referenced concurrent-injury guidance) and the precise evidence strength behind the 85mmHg figure specifically remain based on relatively limited evidence given the difficulty of conducting large RCTs in this population. Timing of surgical decompression (early vs delayed) for incomplete SCI continues to be studied, with some evidence favoring earlier intervention though practice varies.
20. References
- American College of Surgeons. Advanced Trauma Life Support, 11th Edition Course Manual, 2023 (Chapter 7).
- Kirshblum S, Snider B, Rupp R, Read MS; International Standards Committee of ASIA and ISCoS. Updates of the International Standards for Neurologic Classification of Spinal Cord Injury: 2015 and 2019. Phys Med Rehabil Clin N Am. 2020;31(3):319-330.
- Yue JK, Winkler EA, Rick JW, et al. Update on critical care for acute spinal cord injury in the setting of polytrauma. Neurosurg Focus. 2017;43(5):E19.
- Krassioukov A, Claydon VE. The clinical problems in cardiovascular control following spinal cord injury: an overview. Prog Brain Res. 2006;152:223-229.
- Zirpe K, Nimavat B. Traumatic Brain and Spinal Injury (SCI syndrome table). Washington Manual of Critical Care, 4th ed, 2025 (Ch. 61).
See also: Traumatic Brain Injury (Neurology System) for the concurrent-injury MAP >=85 management detail and ICP/CPP framework; Distributive Shock (Cardiovascular System) for the autonomic dysreflexia management principle; Polytrauma (Trauma System) for the xABCDE framework this protocol nests within.
This completes the Trauma System (8/8 protocols).