[Application of intraurethral catheter for geriatric male patients complaining of urethral obstruction due to malignancy--comparison with benign prostatic hypertrophy].

Intraurethral catheters (IUC) were used for elderly male patients with prostatic urethral obstruction (PUO) due to malignancy (MA) and benign prostatic hypertrophy (BPH). Thirty-three men complaining of urinary retention in spite of medical therapy at the risk for prostatic surgery underwent insertion of IUC (16Fr Puroflex, Angiomed Co., Ltd., Germany). Six of 33 were patients with PUO due to MA (5 prostatic cancer, and 1 urethral invasion of rectal cancer, mean 82.7 years old), and the other 27 were patients with BPH (average 80.1 years old). Follow-up period of the former ranged from 2 to 9 (mean 6.5) months, and that of the latter ranged from 6 to 23 months. Water filling cystometry (CMG) before the insertion of IUC and fluoroscopic voiding cystourethrography (VCU) just after insertion of IUC were performed. We defined normal CMG and normal VCU as normal bladder, overactive CMG and normal VCU as overactive bladder, and normal or poor sensitive CMG and underactive VCU as underactive bladder. Five of 27 BPH patients had previous prostatic operations (TUR-P, and/or balloon dilation), but 6 MA did not. All of MA (3 normal bladder, 2 overactive bladder, and 1 underactive bladder) voided satisfactorily, and average duration of IUC in place was 6.5 months without exchange of IUC. Although sixteen of 27 (59.3%) BPH patients voided satisfactorily, and average duration of IUC in place was 12.1 months without exchange of IUC, in the other 11 of these 27 BPH patients were removed IUC, and average duration of IUC in place was 4.7 weeks.(ABSTRACT TRUNCATED AT 250 WORDS)