尿道閉塞下排尿時膀胱尿道撮影による排尿機構の研究

抄録

The purpose of this study is the roentgenological elucidation for the slight disturbance of micturition. The method is as follows: the patient was given four exposures, such as an injection film, a contraction film, a film two minutes after injection, and a choke voiding film in 45 degree oblique position.
The contrast medium for choke voiding is 7% NaI or 19% Urografin which was injected retrogradely into the bladder.
Among 171 cases, normal cases were 50, pathological cases, 96 and slight disturbance of micturition, 25.
1) The normal degree of dilating function of the posterior urethra. —the difference between the choke voiding film and the injection film— is as follows, the internal orifice (A) is 3-7mm, the upper part of verumontanum (B) is 2-7mm, the part of verumontanum (C) is 2-5mm, and the part of external sphincter (D) is 2-5mm.
2) The normal degree of contraction by choke voiding at the prostatic urethra is 2-6mm. (E)
3) The main cause of the slight disturbance of micturition is the neurogenic or muscular disorders in the internal sphincter.
The former: (A) and (B) are at the high grade and (E) is low.
The latter: (A) and (B) are at the low grade and (E) is almostnormal.
4) Among the cases of the slight disturbance of micturition, there are many of cases who belong to the category of chronic prostatitis, neurogenic bladder and prostatism.
5) The author presumes that the whole posterior urethra is the organ of urinary control and that the sphincter mechanism in the part of verumontanum is weaker than others.
6) As the roentgenological elucidation for the slight disturbance of micturition, the author recommends an injection film, a contraction film, a film after injection and a choke voiding film.