Different electrode positioning for transcutaneous electrical nerve stimulation in the treatment of urgency in women: a study protocol for a randomized controlled clinical trial

Treatment for overactive bladder: A meta-analysis of tibial versus parasacral neuromodulation

BACKGROUND

The study aimed to assess the efficacy and safety of parasacral neuromodulation (PNS) versus tibial nerve stimulation (TNS) for patients with overactive bladder (OAB).

METHODS

Databases including PubMed, Embase, clinicalTrial.gov, and Cochrane Library Central Register of Controlled Trials were systematically searched from January 1, 1999 to September 9, 2022. The improvements in a 3-day voiding diary were set as the primary outcomes. Then, the scores of overactive bladder-validated 8-question awareness tool (OAB-V8), King's health questionnaire (KHQ), and international consultation on incontinence questionnaire overactive bladder (ICIQ-OAB) were also evaluated.

RESULTS

Five articles (4 randomized controlled trials [RCTs] and 1 prospective study) including 255 OAB patients were enrolled. Two kinds of neuromodulations had similar performances in the micturition (mean difference [MD] = 0.26, 95% confidence interval [CI]: -0.51 to 1.04, P = .50), urgency episodes (MD = -0.16, 95% CI: -0.64 to 0.31, P = .50), incontinence episodes (MD = 0.09, 95% CI: -0.41 to 0.59, P = .72), as well as in the nocturia episodes (MD = 0.04, 95% CI: -0.45 to 0.52, P = .89). Furthermore, there was no difference regarding ICIQ-OAB scores (P = .83), KHQ (P = .91), and OAB-V8 scores (P = .83). Importantly, included studies reported no adverse events in the 2 groups.

CONCLUSION

TNS and PNS had similar effectiveness for the treatment of OAB, moreover, without any identified adverse events in both groups. However, well-designed RCTs are stilled needed to verify our results.

Physical Agent-Based Treatments for Overactive Bladder: A Review

Almost one-fifth of the people in the world experience a decrease in quality of life due to overactive bladder (OAB) syndrome. The main bothersome symptoms are urgency accompanied by urinary frequency and nocturia. This chronic, disabling condition is first managed by reducing fluid intake and pelvic floor muscle training, supplemented with antimuscarinic drugs, if necessary. However, refractory cases often still occur. In more severe cases, invasive surgical interventions can be considered; yet, the success rate is still inconsistent, and there is a high complication rate. This condition is frustrating for patients and challenging for the medical staff involved. Although its pathophysiology has not been fully elucidated, peripheral autonomic somatic and sensory afferent receptors are considered to be involved in this condition. Hence, currently, physical agent-based treatments such as neuromodulation have taken a significant place in the third-line therapy of OAB. The efficacy and safety profiles of electrical and magnetic stimulation continue to evolve. Physical-based agents provide an appealing option owing to their effectiveness and minimal side effects. In addition, more physical therapies using light and shock energy are currently being investigated. Thus, a comprehensive understanding of these modalities is an extremely important aspect to provide the most suitable modalities for patients.

Posterior Tibial Nerve Stimulation for Overactive Bladder: Mechanism, Classification, and Management Outlines

Purpose of the Review. Posterior tibial nerve stimulation (PTNS) techniques have dramatically grown after approval to manage overactive bladder (OAB). The present review will focus on the most current data on PTNS types (percutaneous, transcutaneous, and implant) and their mechanism of action, safety, efficacy, advantages, drawbacks, limitation, and clinical applications. Recent Findings. The present review described the recent studies that addressed the tibial nerve stimulation role in OAB management. BlueWind RENOVA system, Bioness StimRouter, and eCoin are examples of emerging technologies that have evolved from interval sessions (percutaneous PTNS and transcutaneous PTNS) to continuous stimulation (implants). These can be efficiently managed at home by patients with minimum burden on the health system and fewer visits, especially in the COVID-19 pandemic. Summary. Our review shows that the tibial nerve stimulation advancements in OAB treatment have been rapidly increasing over the recent years. It is minimally invasive and effective, similar to sacral nerve stimulation (SNM), but less aggressive. Implantable PTNS has been promised in terms of efficacy, safety, and high acceptance rate. However, evidence is still limited to short-term trials, and tolerability, method, and drawbacks remain challenges.

Intravaginal electrical stimulation associated with pelvic floor muscle training for women with stress urinary incontinence: study protocol for a randomized controlled trial with economic evaluation

INTRODUCTION

Pelvic floor muscle training (PFMT) exercises and neuromuscular electrical stimulation (NMES) are described as conservative interventions to prevent or treat female stress urinary incontinence (SUI). However, it has not been described yet the effect of PFMT associated to intravaginal NMES which evaluated the cost-effectiveness and cost-utility of treating.

AIMS

To evaluate the effects of intravaginal NMES associated with the PFMT protocol on urinary loss and quality of life in women with SUI and to evaluate the cost-effectiveness and cost-utility and pelvic floor muscle in women with SUI.

METHODS

Randomized controlled trial study with economic evaluation. Inclusion criteria are woman (biological), aged ≥ 18 years old and with a report of SUI ≥ once/week. Exclusion criteria are presence of vaginal or urinary infection, virginity, being in the gestational or puerperium period, or neurological disease. Participants will undergo physical therapy assessment and intervention: anamnesis, pelvic floor muscle assessment by vaginal palpation and manometry (PeritronTM), questionnaires (Short-Form 6 Dimensions-Brazil (SF-6D), King's Health Questionnaire (KHQ) and King´s Health Questionnaire for Scoring Algorithm), health costs, and voiding diary. Participants will be randomly allocated into 3 groups: CG (control group), IG 1 (intervention group 1, PFMT), and IG2 (intervention group 2, PFMT + NMES). The statistical analysis will be performed by intention to treat, and multivariate analysis of mixed effects will be used to compare outcomes. Effect size measurements will be calculated and will be provided by Cohen's d test. A significance level of 5% will be adopted. Additionally, the incremental cost-effectiveness and incremental cost-utility ratios will be used.

DISCUSSION

This protocol can corroborate with the literature in order to identify the effect of techniques, based on the possibility of confirming the hypothesis that the NMES associated with PFMT performed concurrently will be the best treatment option; considering the effectiveness, cost-effectiveness, and cost-utility analysis, it will be used as an option for optimization of the treatment of SUI.

TRIAL REGISTRATION

Brazilian Registry of Clinical Trials (ReBEC) ID: RBR-6gtzg4 . Registered on September 3, 2019.

Parasacral versus tibial transcutaneous electrical stimulation to treat urinary urgency in adult women: Randomized controlled clinical trial

INTRODUCTION

Urinary urgency is a very strong urge to urinate that is difficult to postpone and control. One of the physiotherapeutic resources that can be used in the treatment of urinary urgency is electrical nerve stimulation. The objective of this study is to investigate the effects of parasacral and tibial nerve transcutaneous electrical stimulation in improving urinary urgency in adult women.

MATERIAL AND METHODS

Single-blinded randomized controlled clinical trial.

PARTICIPANTS

Ninety-nine adult women with urgency.

INTERVENTIONS

Transcutaneous electrostimulation for 12, 20-min sessions, twice a week. The tibial and parasacral groups received a current of F = 10 Hz and 200 μs pulse duration, while the sham group received a current of F = 100 Hz and 100 μs pulse duration, the active electrode placed over the scapula. Primary and secondary outcome measures: The primary outcome measure was urinary urgency, measured by the International Consultation on Incontinence Questionnaire Overactive Bladder (ICIQ-OAB) and Overactive Bladder questionnaire-Validated 8-Question Awareness Tool (OAB-V8). Secondary outcomes were quality of life with the King's Health Questionnaire (KHQ) and voiding habits with the 24-h voiding diary. Assessments occurred pretreatment, after the sixth and 12th post-treatment sessions and at the 30-day follow-up.

RESULTS

Both parasacral and tibial groups in the post-treatment presented fewer episodes of urgency than the sham group. The parasacral group showed better results than the sham group post-treatment for ICIQ-OAB scores, and in KHQ domains Impact of Incontinence and task limitations. Parasacral group participants had OAB-V8 score lower than 8 in the post-treatment and follow-up.

CONCLUSION

Both tibial and parasacral groups had a positive and similar effect on reducing urinary urgency in adult women. Relative to the quality of life, transcutaneous parasacral electrostimulation was superior to transcutaneous tibial electrostimulation.

CLINICAL TRIAL REGISTRATION

Brazilian Registry of Clinical Trials (ReBEC), http://ensaiosclinicos.gov.br, protocol RBR-9rf33n.

Long-Term Effect of Early Post-operative Transcutaneous Electrical Stimulation on Voiding Function After Radical Hysterectomy: A Multicenter, Randomized, Controlled Trial

Introduction: Post-radical-hysterectomy (RH) patients suffer from a series of problems resulting from neurovascular injury, such as bladder dysfunction, which reduce their quality of life. We have designed this study to evaluate the efficacy of transcutaneous electrical stimulation (TENS) on patient rehabilitation after RH for early cervical cancer.

Materials and methods: A total of 97 patients were enrolled in a randomized-controlled trial (from January 2015 to December 2019) involving 7 medical centers nationwide. Patients were assigned to either the intervention group (n = 46), or the control group (n = 51). TENS was given to patients in the intervention group from the 7^th day after surgery for a total of 14–21 days. The control group received no TENS. Primary outcomes were measured for residual urine volume and recovery of urination function. Secondary outcomes were measures for urodynamics (UDS), pelvic floor electromyography function examination (PFEmF), and quality of life (QoL).

Results: Residual urine volume and improvement in the rate of urination were found to show no significant differences on the 14^th, 21^st, and 28^th days after surgery. The maximum flow rate (Qmax) in the intervention group was significantly higher than that in the control group on the 28^th day, but there were no significant differences in average flow rate, voiding time, time to Qmax, muscle fiber strength, muscle fiber fatigue, and the abnormal rate of A3 reflection on the 28^th day and the 3^rd mo., as well as in the QoL at 3^rd mo., 6^th mo., and 12^th mo. after surgery.

Conclusion: Our study showed no sufficient evidence to prove that TENS under the trialed parameters could improve the subject's voiding function, PFEmF, and QOL after RH. This has provided valuable data for rehabilitation after RH.

Clinical Trial Registration:www.ClinicalTrials.gov, identifier: NCT02492542.