Spinal Cord Injuries: Ace Your Trauma Assessment
Key Takeaway
Here are the crucial details you must know about Spinal Cord Injuries: Ace Your Trauma Assessment. Assessing suspected spinal cord injuries begins with stabilizing airway, breathing, and circulation, maintaining cervical spine control. Neurological disability is then evaluated using GCS, log roll, and detailed neurological examination with an ASIA chart. Initial imaging includes trauma X-rays, CT scans, and potentially MRI to detect fractures, disc damage, and spinal cord injuries, often revealing other associated trauma.
A 26-year-old man presents following a high-energy motorcycle collision. He is complaining of significant back pain. Describe your primary assessment and initial management steps for this patient.
Candidate: I would follow ATLS principles: Airway with cervical spine protection, Breathing, and Circulation. In the context of suspected spinal cord injury (SCI), I would look for neurogenic shock. I would perform a thorough neurological exam, document using the ASIA chart, and perform a digital rectal exam. Once stable, I would image the whole spine. Further investigation would include a CT scan for bony detail and an MRI if I suspect disc injury or neurological deficit.
Failing to emphasize "whole spine" imaging (missing the 10% risk of non-contiguous injury). Forgetting to mention the specific association with calcaneal fractures in thoracolumbar trauma, or jumping straight to the fracture classification without demonstrating the systematic trauma assessment.
Structure the response: (1) Primary Survey (ATLS), highlighting the distinction between hypovolemic and neurogenic shock. (2) Secondary Survey including a log roll, ASIA chart, and rectal exam. (3) Imaging strategy: Trauma series X-rays, followed by CT of the whole spine (to rule out non-contiguous injuries). (4) High-yield clinical associations: Mentioning associated visceral injuries, vascular risks in cervical injuries, and the "Don Juan" syndrome (calcaneal fractures with lumbar injury).
You mentioned neurogenic shock. How does this differ from spinal shock, and what is the clinical relevance?
Candidate: Neurogenic shock is a hemodynamic state involving hypotension and relative bradycardia due to sympathetic denervation. Spinal shock is a transient state of neurological "concussion" or suppression of reflex activity distal to the injury, typically lasting 24-72 hours. The bulbocavernosus reflex is the first to return.
Confusing the two terms or failing to define the hemodynamic parameters (warm peripheries, bradycardia) for neurogenic shock. Candidates often forget the bulbocavernosus reflex recovery as the marker for the end of spinal shock.
Clearly contrast the physiology: Neurogenic shock = hemodynamic failure (loss of sympathetic tone). Spinal shock = physiological block of electrical conduction (cord edema/contusion). Mention the clinical threshold (24-72 hours) and the return of the bulbocavernosus reflex as the hallmark clinical sign indicating the end of the spinal shock phase.
How do you classify thoracolumbar fractures, and what does the TLICS system add to your decision-making?
Candidate: I use the AO classification (A: compression, B: distraction, C: rotation). The TLICS (Thoracolumbar Injury Classification and Severity Score) by Vaccaro adds a weighted scoring system based on morphology, neurological status, and integrity of the Posterior Ligamentous Complex (PLC). A score <3 is usually non-operative; >5 is operative.
Listing the AO types without explaining *why* they matter (stability). Failing to explain the scoring logic of TLICS or omitting the crucial role of the PLC (the "tension band").
Systematically outline AO types (A=Compression, B=Distraction/Tension, C=Rotation). Then transition to TLICS: Explain that it provides a validated surgical decision-making tool. List the 3 parameters: Injury morphology (1-4 pts), Neurological status (0-3 pts), and PLC status (0-3 pts). Conclude by emphasizing that scores 4 are the "grey zone" where surgeon preference and experience guide the decision.
