[Longterm clinical results of transurethral incision of prostate and bladder neck for benign prostatic hypertrophy].

Early and longterm results of transurethral incision of the prostate and bladder neck (TIPBn) were compared with those of transurethral resection of the prostate (TURP) in treatment of 36 patients with outflow obstruction caused by small benign prostatic hypertrophy. Seventeen patients underwent TIPBn and 19 TURP. Parameters on uroflowmetry (maximum flow rate, average flow rate, voiding time and residual rate) were significantly improved postoperatively in both groups. There was no significant difference in the improvement on uroflowmetry both at early (3 months) and longterm (TIPBn: 12-48, mean 20.1 months, TURP: 12-48, mean 22.2 months) postoperative periods, between the two groups. Subjective symptom of voiding difficulty was remarkably improved in all patients of both groups during early postoperative period. However, at longer follow-up, subjective improvement was preserved in 88.2% in the TIPBn group and 73.7% in the TURP group. A re-operation was needed in 4 cases (21.5%) in the TURP group because of recurrence of obstructive symptom due to postoperative bladder neck contracture, while a second operation has not been performed in the TIPBn group. We conclude that TIPBn can be the preferred surgical treatment of outflow obstruction caused by small benign prostatic hypertrophy.