title: Impact of urethral catheterization on uroflow during pressure-flow study.
abstract: Objective To investigate the impact of urethral catheterization on uroflow by comparing urodynamic parameters of free uroflowmetry versus pressure-flow study in adult patients with benign prostatic hyperplasia, female stress incontinence, lumbosacral spinal injury or spina bifida. Methods Each patient was required to perform pressure-flow study immediately following free uroflowmetry. Maximum flow rate (Qmax), average flow rate (Qave), voided volume (VV), Tmax(time to Qmax) and post-voiding residual urine (PVR) were compared between the two tests. Results Out of 120 patients, transurethral catheterization significantly impacted uroflow. In male patients with benign prostatic hyperplasia ( n = 50), Qmax, Qaveand Tmaxwere significantly different between free uroflow and pressure-flow study. In patients with female stress incontinence ( n = 30), there were no statistically significant between-test differences in VV and Tmax, but Qmax, Qaveand PVR were significantly different. In patients with spinal injury or spina bifida ( n = 40), Qmax, Qaveand VV were significantly different between free uroflow and pressure-flow study. Conclusion Urethral catheterization adversely impacts uroflow in patients with benign prostatic hyperplasia, female stress incontinence, spinal injury or spina bifida. Free uroflowmetry should be performed before pressure-flow study.
authors: Department of Urology, Xiang Ya Hospital, Central South University, Changsha, China.
authors: Bi Song
authors: BS
authors: Zhu
authors: Department of Urology, Xiang Ya Hospital, Central South University, Changsha, China.
authors: Hui Chuan
authors: HC
authors: Jiang
authors: Department of Urology, Xiang Ya Hospital, Central South University, Changsha, China.
authors: Yuan
authors: Y
authors: Li
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008161:Lumbosacral Region / Q000293:injuries / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011470:Prostatic Hyperplasia / Q000503:physiopathology*; D016135:Spinal Dysraphism / Q000503:physiopathology*; D014521:Urethra / Q000601:surgery; D014546:Urinary Catheterization; D014550:Urinary Incontinence, Stress / Q000503:physiopathology*; D014554:Urination / Q000502:physiology; D014563:Urodynamics / Q000502:physiology*
keywords: Urodynamics; catheterization; uroflowmetry