THE EFFECT OF tDCS IN THE TREATMENT OF CHRONIC PELVIC PAIN ASSOCIATED WITH ENDOMETRIOSIS

NCT ID: NCT02161302

Last Updated: 2026-01-15

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2014-06-30

Study Completion Date

2016-05-31

Brief Summary

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The purpose of this study is to determine if transcranial direct current stimulation (tDCS) is effective in the treatment of chronic pelvic pain associated with endometriosis

Detailed Description

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Conditions

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Chronic Pain Endometriosis

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Investigators Outcome Assessors

Study Groups

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Active tDCS

tDCS will be applied in the head of the patients in 20 minute sessions, daily from Monday to Friday for 2 weeks (10 sessions total). The stimulation will be administered with a pair of surface electrodes, sponge coated, soaked in saline. A battery-powered constant current stimulator will be used for this purpose (tDCS device Soterix 1X1). The stimulation is performed by placing the anodal electrode in the primary motor cortex (M1) and the cathodal one in the contralateral supraorbital area, and it will use a 2 mA current.

Group Type EXPERIMENTAL

transcranial direct current stimulation (tDCS)

Intervention Type DEVICE

The stimulation will be administered with a pair of surface electrodes, sponge coated, soaked in saline. A battery-powered constant current stimulator will be used for this purpose (tDCS device Soterix 1X1). The stimulation is performed by placing the anodal electrode in the primary motor cortex (M1) and the cathodal one in the contralateral supraorbital area and it will use a 2 mA current.

tDCS Sham

The sham tDCS consists of the same montage of the active tDCS, but the device is turned off 30 seconds after initiating stimulation (without letting the patient notice it). Rest of the montage is kept identical as the active one during the 20 minutes that the session lasts.

Group Type SHAM_COMPARATOR

Sham Transcranial Direct Current Stimulation

Intervention Type DEVICE

The sham tDCS consists of the same montage of the active tDCS, but the device is turned off 30 seconds after initiating stimulation (without letting the patient notice it). Rest of the montage is kept identical as the active one during the 20 minutes that the session lasts.

Interventions

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transcranial direct current stimulation (tDCS)

The stimulation will be administered with a pair of surface electrodes, sponge coated, soaked in saline. A battery-powered constant current stimulator will be used for this purpose (tDCS device Soterix 1X1). The stimulation is performed by placing the anodal electrode in the primary motor cortex (M1) and the cathodal one in the contralateral supraorbital area and it will use a 2 mA current.

Intervention Type DEVICE

Sham Transcranial Direct Current Stimulation

The sham tDCS consists of the same montage of the active tDCS, but the device is turned off 30 seconds after initiating stimulation (without letting the patient notice it). Rest of the montage is kept identical as the active one during the 20 minutes that the session lasts.

Intervention Type DEVICE

Other Intervention Names

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tDCS Sham tDCS

Eligibility Criteria

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Inclusion Criteria

* age \> 18 years old, non-menopausal, with the diagnosis of endometriosis by videolaparoscopy and biopsy, able to understand and write the Portuguese language, in treatment with isolated progestin for at least one month, who have the worst daily pain in the analogue visual scale \> 4 cm on most of the days in the last month

Exclusion Criteria

* left-handed women, endometriosis implantation in intestine, bladder or urether (surgical treatment indication), history of intense or frequent headache, chronic dermatologic disease, previous adverse effects to treatment with tDCS, seizures, severe cranial trauma with alteration of the cranial anatomy, metallic intracranial implants or pacemaker, history of pelvic inflammatory disease, non-compensated psychiatric disease, non-collaborative patients, history of neurologic, oncologic disease, heart, renal or hepatic failure.
Minimum Eligible Age

18 Years

Maximum Eligible Age

55 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

No

Sponsors

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Hospital de Clinicas de Porto Alegre

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Wolnei Caumo, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Hospital de Clínicas de Porto Alegre

Locations

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Hospital de Clínicas de Porto Alegre

Porto Alegre, Rio Grande do Sul, Brazil

Site Status

Countries

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Brazil

References

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Valle A, Roizenblatt S, Botte S, Zaghi S, Riberto M, Tufik S, Boggio PS, Fregni F. Efficacy of anodal transcranial direct current stimulation (tDCS) for the treatment of fibromyalgia: results of a randomized, sham-controlled longitudinal clinical trial. J Pain Manag. 2009;2(3):353-361.

Reference Type BACKGROUND
PMID: 21170277 (View on PubMed)

Nacul AP, Spritzer PM. [Current aspects on diagnosis and treatment of endometriosis]. Rev Bras Ginecol Obstet. 2010 Jun;32(6):298-307. doi: 10.1590/s0100-72032010000600008. Portuguese.

Reference Type BACKGROUND
PMID: 20945016 (View on PubMed)

Boros K, Poreisz C, Munchau A, Paulus W, Nitsche MA. Premotor transcranial direct current stimulation (tDCS) affects primary motor excitability in humans. Eur J Neurosci. 2008 Mar;27(5):1292-300. doi: 10.1111/j.1460-9568.2008.06090.x. Epub 2008 Feb 29.

Reference Type BACKGROUND
PMID: 18312584 (View on PubMed)

Nitsche MA, Liebetanz D, Antal A, Lang N, Tergau F, Paulus W. Modulation of cortical excitability by weak direct current stimulation--technical, safety and functional aspects. Suppl Clin Neurophysiol. 2003;56:255-76. doi: 10.1016/s1567-424x(09)70230-2. No abstract available.

Reference Type BACKGROUND
PMID: 14677403 (View on PubMed)

Nitsche MA, Cohen LG, Wassermann EM, Priori A, Lang N, Antal A, Paulus W, Hummel F, Boggio PS, Fregni F, Pascual-Leone A. Transcranial direct current stimulation: State of the art 2008. Brain Stimul. 2008 Jul;1(3):206-23. doi: 10.1016/j.brs.2008.06.004. Epub 2008 Jul 1.

Reference Type BACKGROUND
PMID: 20633386 (View on PubMed)

Fenton BW, Palmieri PA, Boggio P, Fanning J, Fregni F. A preliminary study of transcranial direct current stimulation for the treatment of refractory chronic pelvic pain. Brain Stimul. 2009 Apr;2(2):103-7. doi: 10.1016/j.brs.2008.09.009. Epub 2009 Feb 28.

Reference Type BACKGROUND
PMID: 20633407 (View on PubMed)

Caumo W, Ruehlman LS, Karoly P, Sehn F, Vidor LP, Dall-Agnol L, Chassot M, Torres IL. Cross-cultural adaptation and validation of the profile of chronic pain: screen for a Brazilian population. Pain Med. 2013 Jan;14(1):52-61. doi: 10.1111/j.1526-4637.2012.01528.x. Epub 2012 Nov 21.

Reference Type BACKGROUND
PMID: 23171145 (View on PubMed)

Sehn F, Chachamovich E, Vidor LP, Dall-Agnol L, de Souza IC, Torres IL, Fregni F, Caumo W. Cross-cultural adaptation and validation of the Brazilian Portuguese version of the pain catastrophizing scale. Pain Med. 2012 Nov;13(11):1425-35. doi: 10.1111/j.1526-4637.2012.01492.x. Epub 2012 Oct 4.

Reference Type BACKGROUND
PMID: 23036076 (View on PubMed)

Other Identifiers

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14-0092

Identifier Type: -

Identifier Source: org_study_id

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