CHANGES IN PRESSURE-FLOW PARAMETERS IN PATIENTS TREATED WITH TRANSURETHRAL MICROWAVE THERMOTHERAPY

Purpose: We document changes in pressure-flow study parameters in pati ents treated by transurethral microwave thermotherapy. Materials and M ethods: Pressure-flow study tracings before and after therapy from 75 patients with benign prostatic hyperplasia were analyzed. Patients wer e stratified according to the predominant type of obstruction at scree ning (constrictive or obstructive). Results: An improvement in Madsen score and flow rates was noted at 6 months in both groups. In contrast to compressive obstruction patients, however, those with constrictive obstruction also showed significant changes in pressure-flow study pa rameters, including detrusor pressure at maximum flow, maximum flow ra te and urethral resistance factor. Conclusions: Patients with predomin antly constrictive obstruction are the best candidates for microwave t hermotherapy.