ABSTRACT
The uroflowmetry was accurate, noninvasive method in the assessment of infravesical obstruction, but it was difficult to differentiate normal from obstructed individuals. The use of the flow rate nomogram appeared to differentiate reliably normal from obstructed individuals. The uroflowmetries using flow rate nomogram which was previously reported by our hospital, were performed on 35 BPH patients, 12 patients preoperatively and postoperatively (Group I) and 23 patients postoperatively only due to preoperative urinary retention (Group 2). The following results were obtained. 1. In group 1, the mean preoperative maximal flow rate was 9.4 (ml/sec) and the mean postoperative maximal flow rate was 15.3 (ml/sec). 2. In group 2, the mean postoperative maximal flow rate was 18.3 (ml/sec) 3. In group 1, nine of twelve patients (75%) were improved in the maximal flow rate. But six of twelve patients (50% ) were improved in the flow rate nomogram. 4. In group 2, fourteen of twenty-three patients (70%) were improved in the flow rate nomogram. In summary, this study shows much difference in the results between maximal flow rate and flow nomogram. So uroflowmetry using flow rate nomogram, we consider, will show more objective result in the evaluation of prostatectomized patient.