title: Postoperative complications in obstructive sleep apnea.
abstract: OBJECTIVE
  This study was conducted to determine whether postoperative complications are increased in patients with obstructive sleep apnea (OSA) and to study the impact of the severity of OSA and preoperative use of continuous positive airway pressure (CPAP) on the postoperative outcome.
  
  
  METHODS
  This study is retrospective in nature and was undertaken at the VA Medical Center.
  
  
  METHODS
  Three hundred seventy patients who had undergone both a major surgical procedure and a sleep study from 2000 to 2010 were identified. Patients were divided into four groups: OSA negative (apnea-hypopnea index (AHI) < 5/h), OSA positive; mild: AHI 5 to <15/h; moderate: AHI 15 to <30/h; and severe: AHI ≥ 30/h. No intervention was made during the course of the study. Postoperative complications namely respiratory, cardiac, neurological, and unplanned intensive care unit transfers were collected.
  
  
  RESULTS
  There were 284 (76.8 %) patients having OSA and 86 (23.2 %) without OSA. The overall incidence of total complications was significantly higher in the OSA patients compared with the control patients (48.9 vs. 31.4 %; odds ratio 2.09, 95 % CI 1.25-3.49). There was no significant difference in total complications between those using and not using CPAP prior to hospitalization. Patients with sleep apnea had a higher incidence of respiratory complications compared to patients without sleep apnea (40.4 vs. 23.2 %; odds ratio 2.24, 95 % CI 1.29-3.90). There was no significant difference in major cardiac complications in the OSA patients compared with the control patients (13.0 vs. 9.3 %; odds ratio 1.46, 95 % CI 0.65-3.26).
  
  
  CONCLUSIONS
  OSA is associated with a significantly increased rate of postoperative complications.
authors: Western New York Veteran Affairs Healthcare System, Buffalo, NY, USA. mador@buffalo.edu
authors: M Jeffery
authors: MJ
authors: Mador
authors: Sandeep
authors: S
authors: Goplani
authors: V Anand
authors: VA
authors: Gottumukkala
authors: Ali A
authors: AA
authors: El-Solh
authors: Kumar
authors: K
authors: Akashdeep
authors: Ghana
authors: G
authors: Khadka
authors: Mohammed
authors: M
authors: Abo-Khamis
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D019645:Arthroplasty, Replacement, Knee; D002763:Cholecystectomy; D003108:Colonic Diseases / Q000601:surgery; D015897:Comorbidity; D045422:Continuous Positive Airway Pressure; D001026:Coronary Artery Bypass; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology / Q000209:etiology*; D011300:Preoperative Care; D011468:Prostatectomy; D012002:Rectal Diseases / Q000601:surgery; D012307:Risk Factors; D020181:Sleep Apnea, Obstructive / Q000150:complications* / Q000453:epidemiology / Q000628:therapy; D013514:Surgical Procedures, Operative