title: Duration of intra-operative stimulation as a predictor of success of spinal cord stimulation for chronic pain syndromes.
abstract: OBJECTIVE
  Electrical stimulation of the dorsal column of the spinal cord stands out     as a major method of neuromodulation. Its popularity stems from the long lasting     support to the "gate theory" in which electrical stimulation of the     gate prevents passage of nociceptive impulses and reduces pain sensation. There     is little known about the effect of the duration of intraoperative stimulation     (IOS) trial on the success of the spinal cord stimulation trial. MATERIAL and
  
  
  METHODS
  We present our result on 58 patients with spinal cord stimulation     implantation and their IOS trials and short-term follow up.
  
  
  RESULTS
  The major     finding of this study is that the longer the IOS trial, the higher the chances     for failure of SCS. Our study also suggests that tripolar spinal cord     stimulation leads present a more reliable option for long-term success of the     spinal cord stimulation (SCS).
  
  
  CONCLUSIONS
  The duration of IOS seems to     influence the result of the initial trial of SCS. IOS should be between 30-60     minutes to optimize the placement of the lead for better correlation with the     SCS trial.
authors.affiliation: Montreal Neurological Institute and Hospital, Department of Neurology and Neurosurgery, Montreal, Canada. hosam.aljehani@gmail.com
authors.forename: Hosam
authors.initials: H
authors.lastname: Al-Jehani
authors.forename: Wissam
authors.initials: W
authors.lastname: Essawi
authors.forename: Line
authors.initials: L
authors.lastname: Jacques
mesh_terms: D059350:Chronic Pain / Q000628:therapy*; D015331:Cohort Studies; D020918:Complex Regional Pain Syndromes / Q000628:therapy; D004567:Electrodes, Implanted; D055111:Failed Back Surgery Syndrome / Q000628:therapy; D005500:Follow-Up Studies; D006801:Humans; D007432:Intraoperative Period; D059225:Nociception / Q000502:physiology; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D055139:Sensory Gating / Q000502:physiology; D013116:Spinal Cord / Q000502:physiology*; D062187:Spinal Cord Stimulation / Q000295:instrumentation / Q000379:methods*; D016896:Treatment Outcome