title: Comparison of pain relief between patient-controlled epidural analgesia and patient-controlled intravenous analgesia for patients undergoing spinal fusion surgeries.
abstract: BACKGROUND
  This meta-analysis aimed to compare the postoperative analgesic effects of patient-controlled epidural analgesia (PCEA) and patient-controlled intravenous analgesia (PCIA) for patients undergoing spinal fusion surgeries.
  
  
  METHODS
  Relevant articles were identified using computerized and manual search strategies. Statistical analyses were undertaken by the CMA 2.0 statistical software.
  
  
  RESULTS
  Nine cohort studies with a total of 436 patients undergoing spinal fusion surgeries were incorporated in the present meta-analysis. There were significant differences between the PCEA and PCIA groups in the visual analogue scale score of patients undergoing spinal fusion [standardized mean difference = 0.27, 95 % confidence interval (95 % CI) = 0.070-0.470, P = 0.008]. However, no obvious difference was observed in the rate of side effects between the PCIA and PCEA groups (side effects: odds ratio = 0.957, 95 % CI = 0.536-1.708, P = 0.882).
  
  
  CONCLUSIONS
  Our findings suggested that PCEA may be more effective in relieving pain than PCIA for patients undergoing spinal fusion surgeries.
authors.affiliation: Department of Anesthesia, China-Japan Union Hospital of Jilin University, Xian Tai Street No. 126, Er Dao District, Changchun, 130033, People's Republic of China.
authors.forename: Shan
authors.initials: S
authors.lastname: Lu
authors.forename: Si-Chao
authors.initials: SC
authors.lastname: Ma
authors.forename: Yun-Yun
authors.initials: YY
authors.lastname: Wang
authors.forename: Zhi-Hua
authors.initials: ZH
authors.lastname: Zhu
authors.forename: Hong-Wu
authors.initials: HW
authors.lastname: Fan
authors.forename: Guo-Qing
authors.initials: GQ
authors.lastname: Zhao
mesh_terms: D015360:Analgesia, Epidural; D016058:Analgesia, Patient-Controlled / Q000379:methods*; D006801:Humans; D007262:Infusions, Intravenous; D010149:Postoperative Pain / Q000517:prevention & control*; D013123:Spinal Fusion; D064232:Visual Analog Scale