Posterior Cervical Spine

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  • Drill lateral mass screw holes.
  • After drilling lateral mass screw holes, use the Sentio stimulator probe as a feeler gauge.
  • Stimulate at ≥6mA while palpating the walls to confirm you are in bone.
  • Advance probe to the floor of the hole to confirm that the nerve is not located at the floor of the hole.
  • While stimulating, if a ‘STOP’ is triggered at <6mA, back probe out until ‘GO’ to determine a safe length for screw.
  • Pinch the probe to mark the hole depth and insert a screw of appropriate length.