title: Does intraoperative electromyographic monitoring in lumbar microdiscectomy correlate with postoperative pain?
abstract: OBJECTIVE
  Our objective was to correlate the findings of intraoperative electromyographic (EMG) monitoring with immediate postoperative pain in patients undergoing lumbar microdiscectomy.
  
  
  METHODS
  A total of 112 patients undergoing de novo lumbar microdiscectomy were prospectively randomized into a control group (n = 45) and a study group (n = 67) in which intraoperative EMG monitoring was used. Postoperative pain and postoperative narcotic consumption were recorded for each patient.
  
  
  RESULTS
  The presence or absence of EMG monitoring did not influence the level of reported pain in any anatomic area. In the monitored group, the degree of recorded nerve root irritation did not correlate with reported pain or postoperative narcotic consumption. The level of back pain was found to be significantly higher than the level of hip and calf pain (P < 0.0001).
  
  
  CONCLUSIONS
  In our study no correlation was found between intraoperative EMG findings and immediate postoperative pain.
authors.affiliation: Department of Neurosurgery, Medical Center of Central Georgia, Mercer University School of Medicine, Macon, GA, USA. vasdimop@hotmail.com
authors.forename: Vassilios G
authors.initials: VG
authors.lastname: Dimopoulos
authors.forename: Carlos H
authors.initials: CH
authors.lastname: Feltes
authors.forename: Kostas N
authors.initials: KN
authors.lastname: Fountas
authors.forename: Ioannis Z
authors.initials: IZ
authors.lastname: Kapsalakis
authors.forename: Robert L
authors.initials: RL
authors.lastname: Vogel
authors.forename: Bridget
authors.initials: B
authors.lastname: Fuhrmann
authors.forename: Arthur A
authors.initials: AA
authors.lastname: Grigorian
authors.forename: Kim W
authors.initials: KW
authors.lastname: Johnston
authors.forename: Hugh F
authors.initials: HF
authors.lastname: Smisson
authors.forename: Joe S
authors.initials: JS
authors.lastname: Robinson
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D017586:Diskectomy; D004576:Electromyography; D005260:Female; D006801:Humans; D007430:Intraoperative Care; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010149:Postoperative Pain / Q000209:etiology* / Q000503:physiopathology*; D011237:Predictive Value of Tests