title: Persistent detrusor overactivity after transurethral resection of the prostate is associated with reduced perfusion of the urinary bladder.
abstract: OBJECTIVE
  To elucidate, in patients with benign prostatic hyperplasia (BPH), how often detrusor overactivity (DOA) is persistent after transurethral resection of the prostate (TURP) and if perfusion of the lower urinary tract influences postoperative outcomes.
  
  
  METHODS
  Fifty men with urodynamically confirmed DOA and bladder outlet obstruction due to BPH had a TURP. Before and 1 year after TURP the International Prostate Symptom Score (IPSS), quality of life (QoL) score, prostate-specific antigen (PSA) level and total prostatic volume (TPV) were evaluated. Also, the lower urinary tract was evaluated using pressure-flow studies and transrectal colour Doppler ultrasonography to assess the vascular resistive index (RI) as a variable of the perfusion of the lower urinary tract.
  
  
  RESULTS
  After TURP the IPSS, QoL score, PSA level and TPV decreased. Cystometric measurements showed that in 15 (30%) patients DOA was persistent after TURP. The mean (sd) maximum urinary flow rate increased from 9.20 (4.03) to 15.98 (4.62) mL/s and postvoiding residual urine volumes decreased from 109.38 (73.71) to 29.24 (45.00) mL. When men with persistent DOA (15 patients; group 1) were compared with those with no DOA after TURP (35; group 2) there was a statistically significantly higher RI of the bladder vessels in group 1, at 0.86 (0.068) than in group 2, at 0.68 ( 0.055) (P < 0.001).
  
  
  CONCLUSIONS
  Persistent DOA in men after TURP seems to be associated with increased vascular resistance of the bladder vessels with subsequent reduced perfusion and hypoxia.
authors.affiliation: Department of Urology, Innsbruck Medical University, Austria. michael.mitterberger@uibk.ac.at
authors.forename: Michael
authors.initials: M
authors.lastname: Mitterberger
authors.forename: Leo
authors.initials: L
authors.lastname: Pallwein
authors.forename: Johann
authors.initials: J
authors.lastname: Gradl
authors.forename: Ferdinand
authors.initials: F
authors.lastname: Frauscher
authors.forename: Hannes
authors.initials: H
authors.lastname: Neuwirt
authors.forename: Nicolai
authors.initials: N
authors.lastname: Leunhartsberger
authors.forename: Hannes
authors.initials: H
authors.lastname: Strasser
authors.forename: Georg
authors.initials: G
authors.lastname: Bartsch
authors.forename: Germar-Michael
authors.initials: GM
authors.lastname: Pinggera
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D017430:Prostate-Specific Antigen / Q000097:blood; D011470:Prostatic Hyperplasia / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D011788:Quality of Life; D020728:Transurethral Resection of Prostate; D016896:Treatment Outcome; D014463:Ultrasonography; D053201:Urinary Bladder, Overactive / Q000209:etiology* / Q000503:physiopathology; D014551:Urinary Tract / Q000098:blood supply* / Q000000981:diagnostic imaging; D014563:Urodynamics
chemical_list: D017430:Prostate-Specific Antigen