title: Factors influencing morbidity in patients undergoing transurethral resection of the prostate.
abstract: OBJECTIVE
  Transurethral resection of the prostate (TURP) has become the primary method to relieve bladder outlet obstruction for patients with benign prostatic hyperplasia (BPH). Data from 3861 consecutive patients with BPH who underwent TURP from 1971 to 1996 at our hospital were retrospectively analyzed.
  
  
  METHODS
  The patients were classified into two groups comprising 1930 patients who underwent TURP from 1971 to 1985 (early group) and 1931 patients who underwent TURP from 1985 to 1996 (late group). Risk factors associated with blood transfusions and perioperative complications were analyzed in these patients.
  
  
  RESULTS
  Mortality, morbidity, and blood transfusions were noted in 5 (0.1 %), 516 (13.4%), and 507 (13.1%) patients, respectively. The blood transfusion and morbidity rates decreased over the 25-year period (P <0.001, chi-square test for trends), which was reflected in a decrease in these rates in the late group (6.1% and 9.5%, respectively) compared with those of the early group (20.2% and 17.2%, respectively). Postoperative bleeding and morbidity were closely related to prostatic gland size and operating time. The most significant differences for the risk of a blood transfusion were related to resection time, the amount of tissue resected, age, and the decade (1970s, 1980s, or 1990s) in which the surgery was performed (P <0.0005), whereas resection time was significantly correlated with morbidity (P <0.0005). As risk factors for each complication, the time of surgical resection, the decade of surgery, and the amount of tissue resected directly correlated with the incidence of extravasation and hemostatic procedures (P < or =0.003), whereas the incidence of postoperative epididymitis positively correlated with a preoperative vasectomy and a closed drainage system (P <0.0005).
  
  
  CONCLUSIONS
  Since the 1970s, the rates of blood transfusions and morbidity have decreased for patients undergoing TURP. Advances in techniques, instrumentation, and surgical and perioperative management, including anesthesia, have made TURP a relatively safe procedure, and it remains an effective means for treating patients with BPH.
authors.affiliation: Department of Urology, Kitasato University School of Medicine, Kanagawa, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Uchida
authors.forename: M
authors.initials: M
authors.lastname: Ohori
authors.forename: S
authors.initials: S
authors.lastname: Soh
authors.forename: T
authors.initials: T
authors.lastname: Sato
authors.forename: M
authors.initials: M
authors.lastname: Iwamura
authors.forename: T
authors.initials: T
authors.lastname: Ao
authors.forename: K
authors.initials: K
authors.lastname: Koshiba
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001803:Blood Transfusion; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology; D011468:Prostatectomy; D011470:Prostatic Hyperplasia / Q000150:complications / Q000401:mortality / Q000601:surgery*; D012189:Retrospective Studies; D012307:Risk Factors; D001748:Urinary Bladder Neck Obstruction / Q000209:etiology / Q000601:surgery