title: [The study on the effect of the transurethral catheter in pressure-flow study--the comparison with the urination in uroflowmetry].
abstract: OBJECTIVE
  Pressure-flow study (PFS) is an excellent method for detecting the bladder outlet obstruction. However, PFS with the transurethral catheter has the disadvantage of unphysiological urination during testing. In the present study, we compared the urination in PFS with that in uroflowmetry (UFM) and analyzed the effect of the transurethral catheter.
  
  
  METHODS
  The subjects were 43 men who underwent PFS at Yamato Takada Municipal Hospital. PFS and UFM were compared with respect to four parameters, i.e., Qmax, the residual urine volume, the region on Liverpool nomogram, and the flow curve pattern (Jørgensen's classification).
  
  
  RESULTS
  For PFS using a transurethral catheter, (1) Qmax was decreased by a mean of 2.6 ml/s and the residual urine volume was increased by a mean of 26.3 ml compared with UFM, and (2) the Liverpool nomogram and the flow curve pattern showed more impairment of urination with PFS than UFM.
  
  
  CONCLUSIONS
  It is suggested that PFS using a transurethral catheter may not reflect physiological urination.
authors: Department of Urology, Yamatotakada Municipal Hospital.
authors: K
authors: K
authors: Torimoto
authors: M
authors: M
authors: Yasukawa
authors: H
authors: H
authors: Okada
authors: Y
authors: Y
authors: Nakagawa
authors: K
authors: K
authors: Yoshida
authors: H
authors: H
authors: Momose
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D012212:Rheology; D014521:Urethra / Q000503:physiopathology; D001748:Urinary Bladder Neck Obstruction / Q000175:diagnosis* / Q000503:physiopathology; D014546:Urinary Catheterization; D014554:Urination / Q000502:physiology*; D014563:Urodynamics