Lap-belt injury with complete avulsion of the spinal cord and cauda equina
R Shane Tubbs1, Blake Golden, Scott Doyle
1Department of Cell Biology, University of Alabama at Birmingham, Birmingham, Alabama 35233, USA. rstubbs@uab.edu
Insights
A lap belt can cause severe spinal cord transection and herniation, even in children. This case highlights the devastating outcomes of Chance fractures from lap belt injuries.
Area of Science:
- Orthopedic Surgery
- Trauma Surgery
- Pediatric Traumatology
Background:
- Automobile accidents are a leading cause of pediatric trauma.
- Lap belts are standard restraints, but their biomechanics in pediatric spinal injuries require further understanding.
- Chance fractures are uncommon but severe injuries associated with lap belt use.
Observation:
- A child sustained an L4 Chance-type fracture and L4-L5 ligamentous disruption after an automobile accident while restrained by a rear seat lap belt.
- Surgical exploration revealed complete transection of the cauda equina and lower spinal cord.
- The spinal cord fragments had herniated into the extraspinal space through a disrupted thoracolumbar fascia.
Findings:
- Radiological examination confirmed an L4 Chance-type fracture and associated ligamentous disruption.
- Intraoperative findings demonstrated a completely transected spinal cord and cauda equina.
- Herniation of spinal cord elements through a disrupted thoracolumbar fascia was observed.
Implications:
- Clinicians must recognize the potential for severe spinal cord injury in pediatric lap belt-related Chance fractures.
- This case underscores the critical need for appropriate restraint systems and injury prevention strategies in children.
- Understanding the mechanism of lap belt-induced spinal trauma is crucial for effective management and improved patient outcomes.
Abstract:
The authors report a child who was involved in an automobile accident. The patient was restrained by a rear seat lap belt. Radiological examination revealed an L4 Chance-type fracture and ligamentous disruption at the L4-L5 interval. During superficial dissection of the paraspinal muscles for a spinal fusion procedure, the cauda equina and the lower spinal cord (several centimeters) were visible, completely transected and herniated into the extraspinal space through a disrupted thoracolumbar fascia. The clinician should be aware of the potentially devastating results following a lap-belt injury in which a Chance fracture is produced.
Related Concept Videos
Spinal Cord Injury ll: Pathophysiology
Herniated Intervertebral Disc l: Introduction
Secondary Spinal Cord Injury llI: Pathophysiology
Spinal Cord: Gross Anatomy
The Spinal Cord


