Open Pedicle Screw

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  • Prepare pedicle screw hole using pedicle probe.
  • Use the Sentio stimulator probe as a feeler gauge.
  • Stimulate at ≥6mA while palpating the walls to confirm you are in bone.
  • While stimulating, if a ‘STOP’ is triggered at >6mA, hold probe in that position and lower the stimulation current to determine the lowest current that gives a ‘STOP’ response. If a ‘STOP’ is triggered at <6mA, this indicates a nerve is in close proximity. Consider repositioning the hole AWAY from the point at which the ‘STOP’ is elicited.
  • Once a safe hole is achieved, insert screw.