Lateral Mass Screws 

Posted bythespinebookadminPosted inProcedures

Roy Camille 

  • Start: Centre of cross 
  • Axial: 10 degrees lateral 
    • Short to the VA 
  • Sagittal: neutral 
    • Short to the VA 

Magerl 

  • Start: Centre of cross/ inferomedial quadrant 
  • Axial: 25 degrees lateral 
    • Lateral to VA 
  • Sagittal: 45 degrees superior 
    • Nerve root 

VA Injury 

  • Reduce screw length 
    • Prevents full occlusion 
  • Insert screw 
  • Close wound 
  • Send for angiography 
  • Back to OR for alternative fixation lower risk of injuring VAs