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Effektiviteten af ambulant transkutan tibialisnervestimulation ved overaktiv blære

15. september 2026 opdateret af: SEZGIN

Et enkeltcenter, randomiseret, kontrolleret forsøg, der evaluerer effektiviteten af ambulant transkutan tibialis-nerve-stimulering sammenlignet med konventionel protokol hos patienter med overaktiv blære

The goal of this clinical trial is to learn if using a portable nerve stimulation (TENS) device during daily life works to reduce overactive bladder (OAB) symptoms in adults aged 18 to 65. The main questions it aims to answer are:

  • Does using TENS at home during daily activities reduce the number of urgency episodes?
  • Does this approach improve bladder symptoms and quality of life as much as clinic-based treatment?

Researchers will compare two ways of using TENS applied to the ankle area (tibial nerve stimulation):

  • Group 1 (Clinic-based): Participants will visit the clinic twice a week for 2 weeks and receive 30-minute TENS sessions.
  • Group 2 (Ambulatory): Participants will use a portable TENS device at home during their daily routine when they feel the urge to urinate, over a 2 week period.

Both groups will use the same electrical settings (20 Hz frequency, 200 µs pulse width).

Participants will:

  • Complete bladder symptom questionnaires before and after the study
  • Fill in a 3-day voiding diary to track how often they urinate, urgency episodes, and any leakage
  • Answer quality of life questions at the start and at 4 weeks

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Overactive bladder (OAB) is a common condition that causes a sudden, strong need to urinate. It may also cause frequent urination during the day and night, and sometimes urine leakage. Transcutaneous tibial nerve stimulation (TTNS) is a safe, non-invasive treatment that uses mild electrical impulses through the skin near the ankle to calm bladder activity. The posterior tibial nerve at the ankle shares the same spinal nerve roots (L4-S3) that control the bladder.

Current TTNS protocols require regular clinic visits on a fixed schedule. This study introduces an ambulatory approach where participants use a portable TENS device in their daily life when urgency symptoms occur, rather than attending scheduled clinic sessions.

This is a prospective, single-center, randomized controlled trial conducted at Başakşehir Çam and Sakura City Hospital, Istanbul, Turkey. A total of 30 to 50 adults aged 18 to 65 with a clinical diagnosis of OAB who have not improved enough with lifestyle changes and behavioral therapy will be enrolled.

Participants will be randomly placed into one of two groups:

Group 1 - Conventional TTNS: Clinic-based sessions, twice per week for 2 weeks (4 sessions total), each lasting 30 minutes.

Group 2 - Ambulatory TTNS: Participants will receive a portable TENS device and use it at home during daily activities when they experience urgency, over a 4-week follow-up period.

Both groups will use the same stimulation settings: 20 Hz frequency and 200 µs pulse width. Two surface electrodes will be placed over the posterior tibial nerve near the inner ankle. The intensity will be set at a comfortable level just below the point that causes muscle movement.

Outcomes will be measured at baseline and at 4 weeks using OAB symptom scores (OAB-V8 and/or OABSS), a 3-day voiding diary (urinary frequency, urgency episodes, incontinence episodes), and quality of life questionnaires. Treatment adherence, patient satisfaction, and any side effects will also be recorded.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

60

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

    • Istanbul
      • Istanbul, Istanbul, Tyrkiet (Türkiye), 34200
        • Rekruttering
        • Başakşehir Çam and Sakura City Hospital, Department of Urology
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 65 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Adults aged 18 to 65 years
  • Clinical diagnosis of overactive bladder (OAB)
  • Working in an office setting or spending most of the day at home, suitable for using a portable TENS device

Exclusion Criteria:

  • Pregnancy
  • Cardiac pacemaker
  • Epilepsy
  • Metal implant in the ankle area
  • Open wound or skin disease at the electrode site
  • Active urinary tract infection
  • Neurological disease affecting bladder function
  • Previous surgery for urinary incontinence or OAB
  • Current anticholinergic or beta-3 agonist use for OAB
  • Cognitive impairment preventing proper device use

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Aktiv komparator: Conventional Clinic-Based TTNS

Participants will receive transcutaneous tibial nerve stimulation (TTNS) at the clinic twice per week for 2 weeks (4 sessions total). Each session will last 30 minutes. Two surface electrodes will be placed over the posterior tibial nerve near the inner ankle. Stimulation parameters will be set at 20 Hz frequency and 200 µs pulse width, with intensity adjusted to the highest comfortable level below the motor threshold.

Participants will receive TTNS at the clinic twice per week for 2 weeks (4 sessions total), each lasting 30 minutes. Two surface electrodes will be placed over the posterior tibial nerve near the inner ankle. Stimulation parameters: 20 Hz frequency, 200 µs pulse width, intensity at the highest comfortable level below motor threshold. Sessions will be administered by a trained healthcare professional.

Eksperimentel: Ambulatory Self-Administered TTNS

Participants will be provided with a portable TENS device and instructed to self-administer TTNS during their daily activities when they experience urgency symptoms over a 2-week period. Two surface electrodes will be placed over the posterior tibial nerve near the inner ankle. Stimulation parameters will be set at 20 Hz frequency and 200 µs pulse width, with intensity adjusted to the highest comfortable level below the motor threshold. Participants will receive training on correct electrode placement and device use at the first visit.

Participants will use a portable TENS device at home during daily activities when they experience urgency symptoms over a 2-week period. Two surface electrodes will be placed over the posterior tibial nerve near the inner ankle. Stimulation parameters: 20 Hz frequency, 200 µs pulse width, intensity at the highest comfortable level below motor threshold. Participants will receive training on correct electrode placement and device use at the first clinic visit.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Overactive Bladder Symptom Score (OABSS)
Tidsramme: Baseline and 4 weeks

OABSS is a 4-item self-administered questionnaire measuring the frequency of daytime urination, nighttime urination, urgency, and urgency urinary incontinence. Total score ranges from 0 to 15. Higher scores indicate more severe OAB symptoms and worse outcome.

Baseline and 4 weeks
OAB-V8 (Overactive Bladder - V8 Questionnaire)
Tidsramme: Baseline and 4 weeks

Description:

OAB-V8 is an 8-item patient-reported questionnaire assessing the bothersomeness of overactive bladder symptoms. Each item is scored from 0 (not at all) to 5 (a very great deal), yielding a total score ranging from 0 to 40. Higher scores indicate greater symptom burden and worse outcome.

Baseline and 4 weeks
Health-Related Quality of Life - International Consultation on Incontinence Questionnaire Overactive Bladder (ICIQ-OAB)
Tidsramme: Baseline and 4 weeks

The ICIQ-OAB is a patient-reported outcome measure assessing the frequency and bothersomeness of overactive bladder symptoms including daytime urinary frequency, nocturia, urgency, and urgency urinary incontinence. It consists of 4 items, each rated on a symptom frequency scale. Total score ranges from 0 to 16. Higher scores indicate more severe overactive bladder symptoms and worse outcome.

Baseline and 4 weeks

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Patient Satisfaction - Patient Global Impression of Improvement (PGI-I)
Tidsramme: 4 weeks

Description:

The PGI-I is a single-item patient-reported outcome measure assessing the patient's perception of overall improvement following treatment. The scale ranges from 1 to 7, where 1 = "very much better" and 7 = "very much worse." Lower scores indicate greater patient satisfaction and better outcome. The PGI-I is widely used in urological and overactive bladder clinical trials to assess treatment satisfaction.

4 weeks

Samarbejdspartnere og efterforskere

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Sponsor

Datoer for undersøgelser

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Studer store datoer

Studiestart (Faktiske)

15. august 2026

Primær færdiggørelse (Anslået)

15. december 2026

Studieafslutning (Anslået)

15. februar 2027

Datoer for studieregistrering

Først indsendt

12. april 2026

Først indsendt, der opfyldte QC-kriterier

17. april 2026

Først opslået (Faktiske)

20. april 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

18. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • KAEK-11/05.11.2025.397

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