title: [Factors associated with increased blood loss in patients undergoing radical cystectomy in a contemporary series].
abstract: OBJECTIVE
  To evaluate factors predictive of blood loss in radical cystectomy in a contemporary series.
  
  
  METHODS
  From December 1996 to December 2008, clinical data of 233 patients who underwent radical cystectomy were reviewed retrospectively. Various preoperative and operative factors were assessed for their association with blood loss using univariate, multivariate regression and correlation analysis.
  
  
  RESULTS
  One hundred eighty-one patients underwent open radical cystectomy and 52 cases were treated by laparoscopic radical cystectomy. Overall mean operative time was (339 ± 84) minutes, and mean blood loss was (818 ± 756) ml. On univariate analysis, body mass index (F = 9.039), history of pelvic operation (t = -4.365), anesthetic techniques (t = 3.125), surgical type (t = 6.643), use of Ligasure (t = 6.923), and urethra resection (t = -1.984) correlated with blood loss. However, multiple linear regression showed that body mass index (R(2) = 0.256, P < 0.001), history of pelvic operation (R(2) = 0.222, P < 0.001), use of Ligasure (R(2) = 0.172, P < 0.001), and surgical type (R(2) = 0.271, P = 0.027) were significant predictors of blood loss. The transfusion was required in 176 of 233 patients (75.5%) with a median requirement of (649 ± 569) ml. Likewise logistical regression analysis revealed that older age (OR = 3.2, P = 0.010), female gender (OR = 33.7, P = 0.013), anemia (OR = 6.6, P = 0.039), increased blood loss (OR = 14.3, P < 0.001), open radical cystectomy (OR = 6.4, P = 0.036) and nonuse of Ligasure (OR = 10.1, P < 0.001) were predictors of transfusion need.
  
  
  CONCLUSIONS
  Increased body mass index, history of pelvic operation, open radical cystectomy, and non-use of Ligasure were independent predictors of increased blood loss during radical cystectomy. Such a prediction formula has an important role in identifying high risk patient for increased blood loss and transfusion need before radical cystectomy.
authors.affiliation: Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
authors.forename: Sheng-zheng
authors.initials: SZ
authors.lastname: Wang
authors.forename: Ling-wu
authors.initials: LW
authors.lastname: Chen
authors.forename: Huan-yi
authors.initials: HY
authors.lastname: Lin
mesh_terms: D000328:Adult; D000368:Aged; D016063:Blood Loss, Surgical; D015653:Cystectomy / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012307:Risk Factors; D001749:Urinary Bladder Neoplasms / Q000601:surgery*