title: [Obstructive sleep apnea syndrome patients' perioperative and long-term oxygenation status after uvulopalatopharyngealplasty].
abstract: OBJECTIVE
  To explore the perioperative and long-term oxygenation status after uvulopalatopharyngealplasty (UPPP) in patients with obstructive sleep apnea syndrome (OSAS) and evaluate the predictive performance of STOP-BANG questionnaire and modified Epworth sleepiness scale (mESS) scales.
  
  
  METHODS
  Oxygen saturation was continuously monitored with pulse oximeter wristwatch for up to 72 h postoperatively in 46 patients undergoing UPPP. They were followed up after 3 years with polysomnography, STOP-BANG questionnaire and mESS scales.
  
  
  RESULTS
  Oxygen saturation significantly improved postoperatively. The mean SPO₂ was 96.6% during 1 to 4 hour after extubation, 94.9% on POD1, 95.3% on POD2 and 91.1% on pre-operation respectively. The differences were statistically significant (Z = 1.000, P < 0.01). However, there were still episodes of hypoxemia, especially during 1st postoperative night (Z = -3.601 4, P < 0.01). There was no difference (t = 1.029, P > 0.05) in mean SPO2 between pre-operation (89.72 ± 4.88)% and 3 years (88.84 ± 6.16)% after UPPP.
  
  
  CONCLUSIONS
  Although UPPP significantly improves oxygen saturation in OSA patients, hypoxemic episodes still occur in the first 24 hours after surgery, especially during the first postoperative night. UPPP does not improve long-term hypoxemia.
authors.affiliation: Department of Anesthesia, China-Japan Friendship College of Clinical Medicine, Peking University Health Science Center, Beijing 100029, China.
authors.forename: Ruyi
authors.initials: R
authors.lastname: Luo
authors.affiliation: Department of Anesthesia, China-Japan Friendship College of Clinical Medicine, Peking University Health Science Center, Beijing 100029, China. Email: yyq518@sina.com.
authors.forename: Yiqing
authors.initials: Y
authors.lastname: Yin
authors.affiliation: Department of Anesthesia, China-Japan Friendship College of Clinical Medicine, Peking University Health Science Center, Beijing 100029, China.
authors.forename: Chenghui
authors.initials: C
authors.lastname: Li
authors.affiliation: Department of Anesthesia, China-Japan Friendship College of Clinical Medicine, Peking University Health Science Center, Beijing 100029, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhao
authors.affiliation: Department of Anesthesia, China-Japan Friendship College of Clinical Medicine, Peking University Health Science Center, Beijing 100029, China.
authors.forename: Weixia
authors.initials: W
authors.lastname: Li
authors.affiliation: Department of Anesthesia, China-Japan Friendship College of Clinical Medicine, Peking University Health Science Center, Beijing 100029, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Chen
mesh_terms: D006801:Humans; D000860:Hypoxia; D010092:Oximetry; D010100:Oxygen; D059035:Perioperative Period; D017286:Polysomnography; D020181:Sleep Apnea, Obstructive / Q000601:surgery*; D011795:Surveys and Questionnaires
chemical_list: D010100:Oxygen