No immediate effect on urodynamic parameters during transcutaneous electrical nerve stimulation (TENS) in children with overactive bladder and daytime incontinence-A randomized, double-blind, placebo-controlled study.

Aim: To evaluate the immediate effect on natural fill urodynamic parameters and bladder function during transcutaneous electrical nerve stimulation (TENS) in children with overactive bladder (OAB) and daytime urinary incontinence (DUI).

Meethods: In this double-blind, placebo-controlled study, 24 children with severe OAB and DUI (mean age 8.5 ± 1.2 years) underwent 48-h natural fill urodynamics. After 24 h of baseline investigation, the children were randomized to either active continuous TENS (n = 12) or placebo TENS (n = 12) over the sacral S2-S3 outflow. The urodynamic recordings were analyzed manually for three different bladder contraction patterns resulting in a void. The number of bladder contractions not leading to a void was also calculated. Maximum voided volume (MVV) and average voided volume (AVV) were identified for both the baseline and the intervention day.

Results: We found that TENS had no immediate objective effect on bladder capacity. The difference (before minus after treatment) in MVV/EBC in the active TENS group = 0.03 ± 0.23 versus placebo TENS group = -0.01 ± 0.10 (P = 0.61). Also, there was no significant difference in the proportion of different bladder contraction types between the two groups. TENS did not significantly influence the number of bladder contractions not leading to a void. Results are presented as mean ± SD.

Conclusion: There is no immediate objective effect of TENS on bladder activity assessed by natural fill urodynamics in children with OAB and DUI.