title: [The correlation between urodynamics and morphology in men with benign prostatic hyperplasia].
abstract: OBJECTIVE
  We have the impression that the degree of obstruction was stronger in the patients with a middle lobe of hyperplastic nodule than in those without such a lobe in patients with benign prostatic hyperplasia. In the present study, we compared the data from a pressure-flow study (PFS) and a presence of a middle lobe.
  
  
  METHODS
  A transurethral resection for benign prostatic hyperplasia was performed in 2,439 patients, 798 underwent PFS. The PFS findings and the presence of a middle lobe were compared with the following parameters, namely, the bladder detrusor function, the degree of obstruction, the post-voided residual volume, the maximum flow rate, the prostate volume and the resected volume.
  
  
  RESULTS
  In the pressure-flow study, the rate of the normal bladder detrusor function was higher in the patients with a middle lobe than in those without such a lobe (71.9 versus 53.3%). The degree of obstruction was also stronger in the patients with a middle lobe than in those without in the patients with a normal bladder detrusor function (89.0 versus 79.4%). Then in the patients with a middle lobe, the quantity of the post-voided residual volume was greater, however, the maximum flow rate was lower.
  
  
  CONCLUSIONS
  Most patients with a middle lobe demonstrate an improved voiding ability after underwent a transurethral resection.
authors.affiliation: Department of Urology, Miyazaki Medical College.
authors.forename: Hironobu
authors.initials: H
authors.lastname: Wakeda
authors.forename: Mineo
authors.initials: M
authors.lastname: Takei
authors.forename: Akito
authors.initials: A
authors.lastname: Yamaguchi
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D011467:Prostate / Q000473:pathology; D011470:Prostatic Hyperplasia / Q000473:pathology* / Q000503:physiopathology* / Q000601:surgery; D020728:Transurethral Resection of Prostate; D014554:Urination; D014563:Urodynamics / Q000502:physiology*