In this prospective study patients had to have prostate volume ( PV ) < @ mL , International Prostate Symptom Score ( IPSS ) of @-@ , Quality of Life score ( QoLs ) > @ , a maximal flow rate ( Qmax ) of @-@ mL/s , with post voiding residual volume ( PVR ) < @ mL and serum prostatic antigen ( PSA ) < @ ng/mL .