[Urethral instability. Apropos of 26 cases]

The authors report their experience about 26 cases of urethral instability. This dysfunction is not rare; both sexes are involved, children was well as adults. Diagnosis is based on the data of simultaneous urethro-cystometry. Three clinical patterns are recognized: intermittent urinary leakage (6 cases), frequency and urgency (3 cases) and enuresis (17 cases). The urethral instability was pure in 13 cases and associated to detrusor hyperactivity in the other thirteen. But, in one of these the bladder instability was pure. A treatment based on alpha-adrenergic drugs has assured clinical relief and urodynamic stabilization of bladder and urethra.