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Urodynamic evaluation in benign prostatic hypertrophy (BPH) was performed through a comparative analysis of transrectal ultrasonotomography and urethral pressure profile (UPP). Ultrasonically calculated weight, presumed circle area ratio (PCAR) of prostatic adenoma, functional profile length (FPL) and Area in BPH patients complaining of urinary retention were all significantly larger than those in non-retention cases. Above all, Area showed the most prominent difference between these two patient groups. A significant correlation was also proved between PCAR and FPL, PCAR and Area, and FPL and Area. A UPP pattern with pressure peaks at the prostatic region besides the external sphincter was recognized in a few cases. It was supposed that this double peak type of UPP could be recorded as a result of disturbance of the urethral pressure gradient (UPG), a new concept proposed in the current study, evoked by some uropathic factors. The data presented here suggest that the combination of the transrectal ultrasonotomography and UPP would provide both morphorogical and functional informations to clarify the pathogenesis of urinary obstruction in BPH.

TRANSRECTAL ULTRASONOTOMOGRAPHY AND URETHRAL PESSURE PROFILE IN BENIGN PROSTATIC HYPERTROPHY