title: The effect of alpha blockers on uroflowmetric parameters in different voiding positions.
abstract: BACKGROUND
  We assessed the effect of different voiding positions on uroflowmetric parameters and post-void residual (PVR) urine volume in symptomatic benign prostatic hyperplasia (BPH) patients. We also evaluated the effect of alpha blockers on PVR in different voiding positions.
  
  
  METHODS
  The study was performed with 110 BPH patients over 50 years old. In total, 4 uroflowmetries were performed in all patients: 2 patients in the sitting position and 2 in the standing position. PVR was measured with transabdominal ultrasonography. Also, patients were divided into two groups according to the alpha adrenergic blocker treatment; the effect of this treatment on their uroflowmetric parameters in different positions was evaluated.
  
  
  RESULTS
  MAXIMUM FLOW RATE (QMAX) AND AVERAGE FLOW RATE (QAVE) WERE SIGNIFICANTLY HIGHER IN PATIENTS IN THE SITTING POSITION, BUT THERE WERE NO DIFFERENCES IN OTHER UROFLOWMETRIC PARAMETERS AND PVR VOLUME (QMAX: 15.5±5.9 mL/s vs. 13.7±5.2 mL/s, Qave: 11.4±4.6 mL/s vs. 10.7± 3.9 mL/s, respectively; p < 0.05). The Qmax and Qave were significantly higher in sitting position, compared to the standing position, in both alpha adrenergic treatment and non-treated groups; again, there were no differences in other uroflowmetric parameters and PVR volume.
  
  
  CONCLUSIONS
  Qmax and Qave values were significantly higher in the sitting position. Alpha blockers did not affect any change.
authors.affiliation: Tepecik Teaching and Research Hospital Urology Department, Yenisehir, Izmir, Turkey.
authors.forename: Gokhan
authors.initials: G
authors.lastname: Koc
authors.forename: Yuksel
authors.initials: Y
authors.lastname: Yilmaz
authors.forename: Sitki
authors.initials: S
authors.lastname: Un
authors.forename: Kaan
authors.initials: K
authors.lastname: Akbay
authors.forename: Firat
authors.initials: F
authors.lastname: Akdeniz