title: [Length and volume of intravesical prostatic protrusion closely correlated with bladder outflow obstruction in BPH patients].
abstract: OBJECTIVE
  To analyze the correlation of the length and volume of intravesical prostatic protrusion (IPP) with bladder outflow obstruction (BOO) in patients with BPH and to find a simple method for the diagnosis of the disease.
  
  
  METHODS
  The length and volume IPP were measured by transrectal ultrasound for 87 patients with BPH, the diagnosis of BOO was made by urodynamic tests and the correlation of the length and volume of IPP with BOO was analyzed, and reanalyzed 3 months after oral medication of a-blocker. The length and volume of IPP were measured again during the operation in 54 of the cases to confirm the ultrasound findings.
  
  
  RESULTS
  BOO was diagnosed in 51 of the patients. The coefficient of correlation between the length of IPP and BOO and that between the volume of IPP and BOO were 0.53 and 0.47 (P < 0.01). Not considering the dynamic factors, they were 0.69 and 0.62 (P < 0.01), respectively. BOO was confirmed in patients with the length of IPP > 1.0 cm or the volume > 1.5 ml. There was no significant difference between the results of transrectal ultrasound and the findings during the operation concerning the length and volume of IPP (P > 0.05).
  
  
  CONCLUSIONS
  There is a close correlation between the length and volume of IPP and BOO, which can be conveniently applied to the diagnosis of BOO in BPH patients.
authors: Department of Urology, Beyjing Chaoyang Hospital Affiliated to Capital University of Medical Sciences, Beijing 100020, China. liangxlu@163bj.com
authors: Yong
authors: Y
authors: Zhang
authors: Xiao
authors: X
authors: Chen
authors: Zhi-jin
authors: ZJ
authors: Wu
authors: Peng
authors: P
authors: Zhang
authors: Xiao-dong
authors: XD
authors: Zhang
authors: Yong
authors: Y
authors: Yang
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D008875:Middle Aged; D011467:Prostate / Q000000981:diagnostic imaging*; D011470:Prostatic Hyperplasia / Q000150:complications / Q000000981:diagnostic imaging*; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging*; D001748:Urinary Bladder Neck Obstruction / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D014563:Urodynamics