title: Urodynamic analysis of non-improvement after prostatectomy.
abstract: OBJECTIVE
  To study the factors that affect the prognosis of the patients with benign prostatic hypertrophy (BPH) after prostatectomy.
  
  
  METHODS
  Using urodynamic methods, we studied 50 BPH patients with embarrassing outcomes after prostatectomy.
  
  
  RESULTS
  Detrusor instability (Dl) appeared in 20 (40%) patients. Twelve (24%) patients suffered from weak contractility of the detrusor and 18 (36%) patients had bladder outlet obstruction.
  
  
  CONCLUSIONS
  Dl, weak contractility of the detrusor and bladder outlet obstruction are the most frequent causes affecting the prognosis of BPH patients after prostatectomy. Urodynamics may play a significant role in the identification of the causes of unsatisfied prognosis of BPH patients.
authors.affiliation: Department of Urology, Beijing Chaoyang Hospital, Capital University of Medical Sciences, Beijing 100020, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Juzhong
authors.initials: J
authors.lastname: Gao
authors.forename: Zhijin
authors.initials: Z
authors.lastname: Wu
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D008297:Male; D008875:Middle Aged; D011468:Prostatectomy; D011470:Prostatic Hyperplasia / Q000503:physiopathology / Q000601:surgery*; D014563:Urodynamics