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

Clinical Anatomy (New York, N.Y.)
|November 12, 2005
PubMed

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.

Related Concept Videos

Spinal Cord Injury ll: Pathophysiology01:14

Spinal Cord Injury ll: Pathophysiology

Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...
Herniated Intervertebral Disc l: Introduction01:29

Herniated Intervertebral Disc l: Introduction

Intervertebral disc herniation refers to the displacement of the nucleus pulposus (the gel-like inner core of the disc) through a tear or weakened area in the annulus fibrosus (the outer fibrous ring). The displaced disc material extends beyond the normal boundaries of the disc space and may compress or irritate nearby spinal nerve roots or, less commonly, the spinal cord.Etiology and Risk FactorsHerniation commonly results from degeneration, in which aging reduces disc hydration and...
Secondary Spinal Cord Injury llI: Pathophysiology01:25

Secondary Spinal Cord Injury llI: Pathophysiology

Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...
Spinal Cord: Gross Anatomy01:15

Spinal Cord: Gross Anatomy

The spinal cord resides within the protective confines of the vertebral column. It is the main pathway for information traveling between the brain and the body. It plays a fundamental role in nearly all bodily functions, from simple reflexes to complex motor movements. The spinal cord begins at the medulla oblongata at the base of the brainstem and extends downward, terminating at the conus medullaris near the first and second lumbar vertebrae. The spinal cord's length in adults is...
The Spinal Cord01:54

The Spinal Cord

The spinal cord is the body’s major nerve tract of the central nervous system, communicating afferent sensory information from the periphery to the brain and efferent motor information from the brain to the body. The human spinal cord extends from the hole at the base of the skull, or foramen magnum, to the level of the first or second lumbar vertebra.