title: [The volume of residual urine correlates with bladder outlet obstruction and detrusor contractility in patients with benign prostatic hyperplasia].
abstract: OBJECTIVE
  To identify the correlation of the volume of residual urine (VRU) with the severity of bladder outlet obstruction (BOO) and detrusor contractility in patients with benign prostatic hyperplasia (BPH).
  
  
  METHODS
  A total of 152 patients with clinically diagnosed BPH underwent ultrasonography for measurement of the prostate volume and RVU, free uroflowmetry, and urodynamic examination for the severity of BOO and detrusor contractility. Using the software SPSS20. 0, we analyzed the correlation between the ultrasonographic results and urodynamic parameters and compared the two sample means by the t-test.
  
  
  RESULTS
  The prostate volume was correlated positively with BOO severity (r = 0.432, P < 0.01) and detrusor contractility (r = 0.343 , P < 0.01) while Qmax negatively with BOO severity (r = 0.327, P < 0.01) but not significantly with detrusor contractility (r = 0.123, P > 0.05). VRU showed a significantly negative correlation with detrusor contractility when > 150 ml (r = -0.490, P < 0.01), even more significantly when > 300 ml (r = -0.717, P < 0.01), but exhibited no significant correlation with it when ≤ 150 ml (r = 0.041, P > 0.05).
  
  
  CONCLUSIONS
  VRU can somehow predict the detrusor function. For patients with VRU > 150 ml, especially for those with VRU > 300 ml, the detrusor function should be evaluated and urodynamic examination is recommended for exact assessment of BOO severity and detrusor contractility.
authors.forename: Wei-li
authors.initials: WL
authors.lastname: Wu
authors.forename: Hua
authors.initials: H
authors.lastname: Shen
authors.forename: Kai
authors.initials: K
authors.lastname: Liao
authors.forename: Hong-bo
authors.initials: HB
authors.lastname: Yu
authors.forename: He-tong
authors.initials: HT
authors.lastname: Zhou
authors.forename: Hong-fei
authors.initials: HF
authors.lastname: Wu
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D009119:Muscle Contraction; D009122:Muscle Hypertonia / Q000000981:diagnostic imaging* / Q000503:physiopathology; D009929:Organ Size; D011467:Prostate / Q000000981:diagnostic imaging*; D011470:Prostatic Hyperplasia / Q000000981:diagnostic imaging* / Q000503:physiopathology; D012720:Severity of Illness Index; D014463:Ultrasonography; D001748:Urinary Bladder Neck Obstruction / Q000000981:diagnostic imaging* / Q000503:physiopathology; D014556:Urine; D014563:Urodynamics