MORPHOLOGICAL STUDIES OF THE FEMALE BLADDER NECK WITH SPECIAL REFERENCE TO ROENTGENOGRAPHY

Abstract

For the purpose of studying the form of the female bladder neck together with its sphincteric function, the author observed 38 normal cases and 158 abnormal ones which have diseases of the lower urinary tract, by means of roentgenography of the bladder neck and urethrocystography (emptying picture, contraction picture and injection picture), and then compared the radiological findings with the endoscopic findings and the histological findings.
1. As for many diseases, each radiographic appearance of the internal urethral orifice and trigone was observed in the picture of 15 seconds after injection, above all it is remarkable that the relief shadow was found in urethrocystitis.
2. In the picture of two minutes after injection, the rest of contrast medium in the bladder neck suggests organic diseases and sphincteric dysfunctions of the bladder and urethra, and therefore it has a great diagnostic value.
3. By using rcentgenography of the bladder neck, the female bladder neck was classified into four types in anteroposterior position, and four types in oblique position.
4. In the picture of two minutes after injection, the appearance of the ampulla of the urethra was classified into four types by the difference of tension at the external sphincter.
5. As the result of fluoroscopy as for the normal female, it has been proved that the external sphincter plays the leading part in the sphincteric mechanism of the bladder and urethra.
6. As for the cases of urethrocystitis, a comparative study of the change of the bladder neck was made before and after therapy by means of the emptying urethrocystography and the endoscopic and histological examinations, and the interesting findings were obtained.