title: [An experimental study of mucociliary clearance of trachea reconstructed with free jejunum].
abstract: OBJECTIVE
  To investigate tracheal mucociliary transport change after reconstructed with free jejunum.
  
  
  METHODS
  Twelve canine models of extensive circumferential tracheal defects reconstructed with revascularized jejuno combined with Ni-Ti alloy mesh tube were established. Every canine model was marked in cervical skin projecting the lower resected margin of trachea lumen and was injected 50% barium sulfate mucilage as a tracer into the trachea lumen under bronchoscopy. Record the time from tracer injected into trachea lumen to its arriving glottis (mucociliary transit time, MTT) and the length from tracer injected into trachea lumen to glottis (mucociliary transport length, MTL). Mucociliary transit rate (MTR), as MTL/ MTT, was calculated. The same procedure was performed at preoperative and postoperative 7th day, 1 month, 3 months and 6 months.
  
  
  RESULTS
  There were statistical significance between preoperative MTR and 1 month postoperative MTR (P < 0.05). There were no differences between preoperative MTR and postoperative MTR at the 7th day, 1 month, 3 months and 6 months. There were also no differences between postoperative MTR at the 7th day and 1 month, 3 months and 6 months.
  
  
  CONCLUSIONS
  In new tracheal tract reconstructed with free jejunum, MTR becomes normal at 3 months postoperatively.
authors.affiliation: Department of Otorhinolaryngology, Head and Neck Surgery, First People's Hospital of Foshan, Guangdong, Foshan 528000, China.
authors.forename: Fa-Yao
authors.initials: FY
authors.lastname: He
authors.forename: Yue-Jian
authors.initials: YJ
authors.lastname: Wang
authors.forename: Ling-Guo
authors.initials: LG
authors.lastname: Ma
authors.forename: Jian-Li
authors.initials: JL
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: Tang
authors.forename: Wei-Xiong
authors.initials: WX
authors.lastname: Chen
authors.forename: Yong
authors.initials: Y
authors.lastname: Zeng
mesh_terms: D000818:Animals; D004285:Dogs; D005260:Female; D007583:Jejunum / Q000637:transplantation*; D008297:Male; D009079:Mucociliary Clearance; D019651:Plastic Surgery Procedures / Q000379:methods; D014132:Trachea / Q000503:physiopathology* / Q000601:surgery*; D014182:Transplantation, Autologous