title: Comparison of harmonic blade versus traditional approach in canine patients undergoing spinal decompressive surgery for naturally occurring thoracolumbar disk extrusion.
abstract: OBJECTIVE
  To assess feasibility of the harmonic Osteovue blade (HOB) for use in the soft tissue approach for dogs undergoing hemilaminectomy and to compare outcomes between dogs undergoing HOB or traditional approach (TRAD).
  
  
  METHODS
  A prospective randomized clinical trial was performed using 20 client-owned dogs with thoracolumbar intervertebral disk extrusion requiring hemilaminectomy. Dogs were randomly assigned to HOB or TRAD. Neurologic function and pain scores were assessed pre-operatively. Intraoperative blood loss and surgical approach time as well as postoperative pain and wound healing scores were recorded. Additionally, neurologic recovery and owner perceived quality of life were recorded at day 10 and 30 postoperative.
  
  
  RESULTS
  There was no significant difference in sex distribution, weight, age, preoperative neurological grade and pain score, and perioperative outcome measures between groups. Intraoperative total blood loss was minimal for HOB and TRAD (median: 0 ml (range 0-9) and 2.2 ml (range 0-6.8), respectively; p = 0.165) and approach times were similar (median: 7 min (range 5-12) and 8 min (range 5-13), respectively; p = 0.315). While changes in wound healing scores were similar, changes in postoperative pain scores and neurological function were significantly improved in the HOB compared to the TRAD group. Postoperative complications in the HOB group consisted of automutilation of part of the incision and development of a small soft, non-painful subcutaneous swelling in 1 dog each.
  
  
  CONCLUSIONS
  The HOB is a safe and effective tool for the soft tissue approach for routine spinal surgery in dogs and is associated with decreased pain and increased neurological function post-surgery.
authors.affiliation: Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Ohio State University, Columbus, Ohio, United States of America.
authors.forename: Bianca F
authors.initials: BF
authors.lastname: Hettlich
authors.affiliation: Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Ohio State University, Columbus, Ohio, United States of America.
authors.forename: Laurie
authors.initials: L
authors.lastname: Cook
authors.affiliation: Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Ohio State University, Columbus, Ohio, United States of America.
authors.forename: Cheryl
authors.initials: C
authors.lastname: London
authors.affiliation: Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa.
authors.forename: Geoffrey T
authors.initials: GT
authors.lastname: Fosgate
mesh_terms: D000818:Animals; D019299:Decompression, Surgical / Q000009:adverse effects / Q000295:instrumentation*; D004283:Dog Diseases / Q000503:physiopathology / Q000601:surgery*; D004285:Dogs; D005260:Female; D007405:Intervertebral Disc Displacement / Q000150:complications / Q000503:physiopathology / Q000601:surgery / Q000662:veterinary*; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D010146:Pain / Q000150:complications; D012449:Safety; D011795:Surveys and Questionnaires; D013904:Thoracic Vertebrae / Q000601:surgery*