Spinal cord intramedullary pressure: direct cord traction test

Area of Science:

• Neurosurgery
• Spinal Cord Physiology

Background:

• Spinal cord intramedullary pressure is a critical factor in spinal cord health.
• Understanding pressure dynamics is essential for diagnosing and treating spinal cord pathologies.

Purpose of the Study:

• To investigate the effects of mechanical compression and traction on spinal cord intramedullary pressure.
• To elucidate the relationship between anterior spinal canal lesions and changes in spinal cord pressure.

Main Methods:

• Intramedullary pressure measurement using a balloon catheter in mongrel dogs.
• Cervical laminectomy and controlled dorsal traction applied to the spinal cord at the C-5 level.

Main Results:

• Spinal cord pressure significantly increased at C-5 under traction load.
• A notable pressure increase was also observed at C-6, indicating pressure transmission.
• Findings suggest pressure elevation due to anterior compression and cord stretching.

Conclusions:

• Mechanical compression of anterior spinal structures and cord stretching elevate intramedullary pressure.
• This pressure increase may contribute to neurological deficits in conditions involving anterior spinal lesions.