title: Preoperative Urinary Retention Increased the Risk of Urinary Retention after Photoselective Vaporization of the Prostate.
abstract: OBJECTIVE
  The aim of the present study was to evaluate preoperative acute urinary retention (AUR) as a factor affecting the outcomes of patients who underwent photoselective vaporization of the prostate (PVP), both in terms of overall effectiveness and the postoperative incidence of AUR.
  
  
  METHODS
  Baseline prostate characteristics were obtained for patients who underwent PVP, including prostate-specific antigen (PSA) levels, transrectal ultrasound findings, voiding diary parameters, the International Prostate Symptoms Score (IPSS), and uroflowmetry parameters. These parameters were assessed two weeks, one month, three months, six months, and three years postoperatively. Subjects were divided into AUR and non-AUR groups based on the preoperative occurrence of AUR.
  
  
  RESULTS
  Of the 476 patients, 91 had at least one episode of preoperative AUR. The AUR group was found to be significantly older and to have significantly higher PSA levels, lower body mass indices, and larger prostates. At one year of follow-up, the total IPSS was 7.6±6.8 in the AUR group and 11.4±8.2 in the non-AUR group, with the AUR group showing a more significant improvement. In the non-AUR group, 17 of the 385 patients (4.4%) experienced postoperative retention, compared to 16 of the 91 patients (17.6%) patients in the AUR group.
  
  
  CONCLUSIONS
  Almost all patients exhibited improvements in subjective and objective voiding parameters following PVP, regardless of the presence of preoperative urinary retention. Patients with a preoperative history of AUR had a higher risk of postoperative retention.
authors.affiliation: Department of Urology, Seoul National University College of Medicine, Seoul, Korea.; Department of Urology, SMG-SNU Boramae Medical Center, Seoul, Korea.
authors.forename: Sung Yong
authors.initials: SY
authors.lastname: Cho
authors.affiliation: Department of Urology, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Yun Kwan
authors.initials: YK
authors.lastname: Ro
authors.affiliation: Department of Urology, Seoul National University College of Medicine, Seoul, Korea.; Department of Urology, SMG-SNU Boramae Medical Center, Seoul, Korea.
authors.forename: Hwanik
authors.initials: H
authors.lastname: Kim
authors.affiliation: Department of Urology, Seoul National University College of Medicine, Seoul, Korea.; Department of Urology, SMG-SNU Boramae Medical Center, Seoul, Korea.
authors.forename: Hwancheol
authors.initials: H
authors.lastname: Son
keywords: Laser therapy; Lower urinary tract symptoms; Prostate; Urinary retention