title: Changes in rima glottidis area and lack of laryngeal epiglottic-glottic seal after unilateral cricoarytenoid lateralization ex vivo.
abstract: OBJECTIVE
  To evaluate variation in rima glottidis (RG) area and lack of epiglottic-glottic seal (LEGS) of the canine larynx associated with different suture anchor points in the arytenoid and cricoid cartilages, dissection of the cricoarytenoid joint capsule, section of the interarytenoid band, and disarticulation of the cricothyroid joint.
  
  
  METHODS
  Experimental study.
  
  
  METHODS
  Cadaveric canine larynges (n = 18).
  
  
  METHODS
  Larynges were assigned to 2 groups: group 1 = intact cricothyroid articulation and group 2 = cricothyroid articulation sharply sectioned. In each group, the arytenoid cartilage was lateralized successively as follows: (a) intact cricoarytenoid articulation, (b) cricoarytenoid articulation sharply sectioned, and (c) division of the interarytenoid band. Each variation was performed initially with the suture passed dorsally into the cricoid cartilage then with the suture passed laterally. Each time, the increase of rima glottis area (%) and the LEGS (mm(2) ) were measured.
  
  
  RESULTS
  Rima glottis area (RGA): when the suture was placed dorsally, division of the interarytenoid band resulted in a significant increase in RGA compared with groups with an intact band. Laryngeal distortion: when the suture through the cricoid cartilage was dorsal, LEGS increased with section of the cricothyroid articulation, dissection of cricoarytenoid articulation, and division of the interarytenoid band.
  
  
  CONCLUSIONS
  Unilateral arytenoid lateralization results in some degree of LEGS with a misalignment of the epiglottis over the RG. Our results revealed that the optimal RGA associated with the minimal LEGS was obtained with dorsal placement of a cricoarytenoid suture when the cricothyroid joint and the interarytenoid band were intact.
authors.affiliation: École National Vétérinaire Toulouse, Toulouse, France.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Guillemot
authors.forename: Gérald
authors.initials: G
authors.lastname: Rouvre
authors.forename: André
authors.initials: A
authors.lastname: Autefage
authors.forename: Sébastien
authors.initials: S
authors.lastname: Etchepareborde
mesh_terms: D000818:Animals; D001193:Arytenoid Cartilage / Q000601:surgery; D001696:Biomechanical Phenomena; D002102:Cadaver; D003413:Cricoid Cartilage / Q000601:surgery; D004283:Dog Diseases / Q000601:surgery*; D004285:Dogs; D004825:Epiglottis / Q000601:surgery; D005931:Glottis / Q000601:surgery; D007818:Laryngeal Diseases / Q000601:surgery / Q000662:veterinary*; D007825:Laryngectomy / Q000295:instrumentation / Q000662:veterinary*; D007830:Larynx / Q000601:surgery; D053441:Suture Anchors / Q000662:veterinary