title: Electromyography in evaluation of pain after different types of tonsillectomy: prospective randomized study.
abstract: BACKGROUND
  Combined surface electromyography (sEMG) and visual analogue scale (VAS) pain assessment was performed on randomly assigned adults following tonsillectomy to research the effect of fibrin sealant (Group 1, n = 25), CO(2) laser (Group 2, n = 18) and electrocoagulation (Group 3, n = 40) on postsurgical pain.
  
  
  METHODS
  Timing and amplitude of sEMG activity of masseter, infrahyoid and submandibular muscles were measured during swallowing simultaneously with VAS assessment and compared to normative database.
  
  
  RESULTS
  Postsurgical electric activity of masseter and infrahyoid was significantly higher in comparison with normative database. sEMG and VAS data showed that tonsillectomy ended with fibrin sealant caused less pain than laser or electrocoagulation techniques with no correlation between the VAS score and duration of swallows.
  
  
  CONCLUSIONS
  Tonsillectomy affects muscle activity significantly by involving additional muscles (infrahyoid) in swallowing. Combined sEMG and VAS data indicated electrocautery as the most painful, laser as less painful, and fibrin sealant as the least painful technique.
authors.affiliation: Department of Otolaryngology, Assaf Harofeh Medical Center, Affiliated to Sackler Faculty of Medicine, Tel Aviv University, Zeriffin, Israel. vaimed@yahoo.com
authors.forename: Michael
authors.initials: M
authors.lastname: Vaiman
authors.forename: Haim
authors.initials: H
authors.lastname: Gavrieli
authors.forename: Daniel
authors.initials: D
authors.lastname: Krakovski
mesh_terms: D000328:Adult; D004576:Electromyography / Q000295:instrumentation; D005260:Female; D006801:Humans; D008297:Male; D010147:Pain Measurement / Q000295:instrumentation*; D010149:Postoperative Pain / Q000175:diagnosis*; D011446:Prospective Studies; D012720:Severity of Illness Index; D014068:Tonsillectomy