Pneumatically powered vertebral displacement device for dogs

Area of Science:

• Biomedical Engineering
• Veterinary Neuroscience
• Orthopedic Surgery

Background:

• Spinal cord injuries (SCIs) pose significant research challenges.
• Developing reliable animal models is crucial for understanding SCI pathophysiology.
• Current models may lack the precision to replicate specific injury mechanisms.

Purpose of the Study:

• To develop and validate a pneumatically powered device for inducing controlled vertebral displacement and spinal cord injury in a canine model.
• To establish a reproducible method for studying the biomechanics and consequences of traumatic spinal injuries.

Main Methods:

• A pneumatically powered device was utilized to create vertebral displacement in dogs following surgical exposure of the spine.
• The procedure avoided laminectomy and intervertebral disc disruption, inducing luxation or fractures between L1 and L2.
• A load sensing system recorded the force, ranging from 1,848 to 2,666 Newtons, required for displacement.

Main Results:

• The device successfully induced vertebral displacement and spinal cord injury in dogs.
• Injuries included luxation or fractures at the L1-L2 vertebral segments.
• Partial spontaneous reduction of the displaced segment was observed in some subjects post-trauma.

Conclusions:

• The developed pneumatic device is effective for producing reproducible spinal injuries in dogs.
• This model offers a valuable tool for investigating spinal column and spinal cord injury mechanisms and potential treatments.