[Acute urinary obstruction].

Acute urinary obstruction is a painful occurrence well known to every physician. It is a matter of a reflexogenic closure of the bladder neck. As the nerves, regulating the neck as well as the motoricity of the bladder, extend directly over the capsule of the prostate, functional disorders during growth of the prostate are possible at any time, independent of the prostatic volume. Since in case of prostatic hyperplasia the smooth muscles of the bladder neck are partly transformed into fibrous tissue, drug treatment in case of acute urinary obstruction is impossible. Therefore catheterisation is applied now as before.