リニア走査経直腸的超音波断層法による後部尿道の観察

Abstract

1)後部尿道の排尿時の動きをリニア走査経直腸的超音波断層法を用いてビデオモニター下に観察, 同時に尿流量測定法を施行し, 両者の関係を検討した.2)後部尿道の開大には, 膀胱頸部の開大よりも, 後部尿道の腹側面の前方への動きが大きな役割を演じている.3)排尿効率には膀胱頸部の開大より前立腺部尿道の開大のほうが重要である

Transrectal linear ultrasonography was performed on 59 male patients with dysuria, and voiding movement of the posterior urethra was observed with a videomonitor. Uroflowmetry was performed simultaneously, and the results were compared with those obtained in a previous study. On the image synchronized with maximum flow rate, the diameter of the bladder neck, and the center of the prostatic urethra were measured as parameters and the correlation with maximum flow rate, average flow rate, and residual urine rate, was examined. The forward movement of the ventral side of the posterior urethra was found to play a more important role in the opening of the posterior urethra, than the opening of the bladder neck, and the width of the prostatic urethra to play a more important role in the efficiency of urination than the width of the bladder neck.