Double train stimulation of thoracic pedicle screw, nerve root and spinal cord
Objective Pedicle screw stimulation (PSS) is used during scoliosis surgery to warn about screw malposition and impact on spinal neural structures. In thoracic segments, PSS may stimulate nerve roots, spinal cord or both. Single electrical pulse is sufficient to stimulate nerve roots, and train of pulses is needed for spinal cord.
