Objective: the aim of this study is to investigate the effect of posterior tibial nerve electrical stimulation (PTN) on urodynamic parameters and its effect in treatment of overactive bladder Subjects: Sixty patients were included in this study. Their ages ranged from 20-70 years (mean age 52.96 ±15.18). They were randomly allocated into two equal groups. Procedures: Group (A) received 12 weeks posterior tibial nerve electrical stimulation with frequency 1-10 HZ, pulse width 200 μHZ, intensity according to patient tolerance, duration of treatment 15 min 3 times /week for 12 weeks, while group (B) received pelvic fl oor exercises for 15 min 3 times/week for 12 weeks. Results: The result of this study revealed that, the bladder volume at fi rst desire to void for group (A) as well as for group (B), showed no statistical signifi cant difference. Bladder stability in group (A) showed a highly statistical signifi cant improvement with a percentage 48.69% while for group (B) is not signifi cant , by comparing both groups post-treatment, there was a statistical signifi cant difference between groups with high percentage of improvement of the bladder stability in group (A) more than group (B). Maximum fl ow rate was signifi cantly improved post-treatment for group (A) with a percentage of improvement 25.2% , as well as for group (B) with a percentage of improvement 12.37%, and by comparing both groups post treatment there was a statistical signifi cant improvement in (A) group more than in group (B) Conclusion: The results demonstrated that, there is objective effect of PTNS on urodynamic parameters especially bladder stability, and maximum fl ow rate, also PTNS is effective to suppress detrusor over activity in patient with overactive bladder.

Key words: Posterior Tibial Nerve; Electrical stimulation; Overactive bladder; Urgency.