title: [Study on hemorrhage following coblation assisted uvulopalatopharyngoplasty].
abstract: OBJECTIVE
  To compare the postoperative hemorrhage between standard uvulopalatopharyngoplasty (UPPP) and coblation assisted UPPP, and to evaluate the related risk factors and preventive measures.
  
  
  METHODS
  Five hundreds and ninety seven patients with obstructive sleep apnea hypopnea syndrome (OSAHS) underwent UPPP and coblation assisted UPPP between January 1, 1999, and September 30, 2009 were reviewed retrospectively. Two hundred and sixty three patients with coblation assisted UPPP and 334 patients with standard UPPP were treated respectively. Single factor statistic analysis, multiple factors Logistic regress statistic analysis and Wilcoxon test method for related risk factors were applied.
  
  
  RESULTS
  A total of 42 patients (7.0%) experienced postoperative bleeding. Among them, 24 patients with coblation assisted UPPP (9.1%) and 18 patients with UPPP (5.4%) had postoperative hemorrhage. Significant difference was not found in the degree of hemorrhage (z = 0.784, P > 0.05), hemorrhage site(χ(2) = 1.387, P > 0.05) and postoperative hemorrhage rates (χ(2) = 3.14, P > 0.05) between the two surgical techniques. Significant difference was found in the interval of hemorrhage after surgery between the two surgical techniques (χ(2) = 9.25, P < 0.01). History of hypertension, smoking, hepatic dysfunction was found to be correlated with the postoperative hemorrhage (Odd-ratio were respectively 7.326, 3.674, 2.707).
  
  
  CONCLUSIONS
  Coblation technique did not significantly increase UPPP postoperative hemorrhage.
authors.affiliation: Department of Otorhinolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing 100034, China.
authors.forename: Hai-jing
authors.initials: HJ
authors.lastname: Sui
authors.forename: Shui-fang
authors.initials: SF
authors.lastname: Xiao
authors.forename: Yong
authors.initials: Y
authors.lastname: Qin
authors.forename: Quan-gui
authors.initials: QG
authors.lastname: Wang
authors.forename: En-min
authors.initials: EM
authors.lastname: Zhao
authors.forename: Yu-He
authors.initials: YH
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: Shen
authors.forename: Tian-cheng
authors.initials: TC
authors.lastname: Li
authors.forename: Tie-chuan
authors.initials: TC
authors.lastname: Cong
mesh_terms: D000328:Adult; D017115:Catheter Ablation / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013517:Otorhinolaryngologic Surgical Procedures / Q000009:adverse effects* / Q000379:methods; D010159:Palate / Q000601:surgery; D010160:Palate, Soft / Q000601:surgery; D010614:Pharynx / Q000601:surgery; D019106:Postoperative Hemorrhage / Q000209:etiology*; D012189:Retrospective Studies; D020181:Sleep Apnea, Obstructive / Q000601:surgery*; D014609:Uvula / Q000601:surgery; D055815:Young Adult