- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05720871
Treatment of Chronic Post-stroke Oropharyngeal Dysphagia With Paired Stimulation (ICI20/00117)
Treatment of Chronic Post-stroke Oropharyngeal Dysphagia With Paired Stimulation Through Peripheral TRVP1 Agonists and Non-invasive Brain Stimulation
Study Overview
Status
Detailed Description
- Main hypothesis: Paired neurorehabilitation treatment targeting both pharyngeal sensory and motor components simultaneously through a peripheral pharmacological stimulant (Transient Receptor Potential Cation Channel [TRPV1] agonist, capsaicin) and central stimulation (NIBS) strategies (rTMS or tDCS) can improve swallowing function in chronic PS-OD patients by promoting cortical plasticity, their QoL and reduce OD associated complications.
- Main aim: To assess the effects on swallowing of 2 neurostimulation strategies applied for 5 days to treat PS-OD in the chronic phase (>3 months from stroke onset) of ambulatory patients, the application of rTMS + capsaicin vs. tDCS + capsaicin in two independent RCTs. The main outcome measure for these three RCTs will be changes in prevalence of impaired safety of swallow assessed by videofluoroscopy.
- Secondary aims To assess: 1) safety and adverse events; 2) the effects on safety of swallow with a standardized protocol of swallowing evaluation; 3) clinical outcomes at 3 months follow up; 4) the effect of the treatments on SSF and responsiveness to treatment according to stroke characteristics; 5) the effect in the chronic phase on: i) assessment of afferent and efferent pathways with sensory and motor evoked-potentials to electrical pharyngeal stimulation and TMS, respectively; ii) prevalence of signs of impaired safety/efficacy on videofluoroscopy (VFS), the penetration-aspiration score (PAS) (Rosenbek scale) and the biomechanics of the swallow response; and iii) specific clinical outcomes such as mid-term complications, readmission rate and QoL.
- Design: Single-center, double-blinded, two-arm, double-randomization RCT. Patients are distributed into two parallel subgroups (each with its own sham group) according to intervention type.Blinding will be applicable for clinical and instrumental assessments for investigators, and for intervention condition for patients. Patients undergo V-VST, biomechanical (VFS) and neurophysiological (sEMG and evoked potentials) swallowing evaluation, and double randomization, first for intervention type (tDCS or rTMS) and then for intervention condition (active or sham), using the same software as Task1. Treatment is applied for 5 consecutive days using either rTMS (G1: active rTMS+capsaicin; G2: sham rTMS+placebo) or tDCS (G1: active tDCS+capsaicin; G2: sham tDCS+placebo) as NIBS procedures. Finally, patients are reevaluated as before and clinical outcome at 3 months.
- Study population: 200 Chronic PS-OD ambulatory patients.
- Inclusion criteria: Chronic (>3 and <24 months) unilateral hemispheric stroke adult patients; ISS (V-VST); can follow the study protocol and give written informed consent.
- Exclusion criteria: Pregnancy; life expectancy <3m or palliative care; neurodegenerative disorder or previous OD; implanted electronic device; epilepsy; metal in the head; participation in another clinical trial in the previous month.
- Sample size/power calculation: The main outcome measure is the prevalence of patients with ISS according to VFS at post-treatment visit. To compare the prevalence between groups, using the arcsinus approximation, accepting an alpha risk of 0.05 and a beta risk of 0.2 in a 2-sided test, 50 patients/group are needed for each NIBS procedure, 2 for rTMS and 2 for tDCS (4 groups=total of 200 patients) to find a significant difference in the proportion of 0.4 in the control group and 0.7 in treated group (drop-out rate of 15%).
- Recruitment: Patients will be consecutively recruited and randomly allocated to the groups, according first to NIBS procedure (1:1, tDCS/rTMS) and then to intervention condition (1:1, active/sham).
- Study Intervention:
tDCS: G1: Active treatment consists of swallowing 10mL capsaicin (150μM) and, just after, of applying 30min of 2.0mA tDCS (DC-Stimulator Plus, NeuroConn, Germany) with the anode placed over the pharyngeal primary motor cortex (M1) of the unaffected hemisphere (3.5cm lateral / 1cm anterior to the vertex) and the cathode over the opposite supraorbital region. Treatment applied over 5 consecutive days.
rTMS: G1: each session (5 consecutive days) of active treatment consists of swallowing 10mL capsaicin (150μM) and, just after, of applying focal (alpha D70 coil) rTMS (Magstim Rapid2, UK) over the pharyngeal M1 hotspot of the unaffected hemisphere. Neuronavigation (Brainsight TMS navigation, UK) ensures the exact hotspot over 5 days. A total of 500 pulses/session are delivered consisting of 10 5Hz-trains of 10s of 50 pulses each (total 2500 pulses), with a 1min interval between trains at an intensity of 90% of the resting motor threshold (RMT). G2: Sham rTMS+oral placebo (10mL of potassium sorbate). The same protocol will be applied, but with the coil tilted 90º from the tangent of the skull, as a standard method for sham rTMS application.
- Swallowing assessment (pre- and post-intervention): Patients with impaired safety of swallow will be screened with volume-viscosity swallowing test (V-VST), and videofluoroscopy (VFS) recordings are obtained in a lateral projection (25 frames/s). Swallow biomechanics are analyzed at VFS with Swallowing Observer (Image&Physiology SL, Spain). The spontaneous swallowing frequency (SSF) during 10min will be measured with surface electromyography (sEMG) over the digastric-mylohyoid complex.
- Pharyngeal sensory evoked potentials (pSEPs) are recorded with a 32-electrode electroencephalographic (EEG) recording cap (10/20 system) during a series of electrical stimuli (4 sets of 50 pulses of 0.2ms at 0.2Hz, intensity of 75% tolerance threshold; Digitimer DS7A & DG2A pulse generator, UK) applied to the pharynx with an intra-pharyngeal catheter (Gaeltec Ltd, Scotland).
- Pharyngeal motor evoked potentials (pMEPs) and RMTs for both hemispheres are recorded with the same catheter to TMS (20 pulses to each hotspot at intensity +20%RMT; Magstim Bistim2, UK).
Primary outcomes: Pre- vs post-intervention changes in VFS signs of safety and efficacy of swallow, PAS scoring, timing of swallow response and amplitude and latency of pSEPs and pMEPs.
- Secondary outcomes: Pre/post-intervention changes in sEMG for SSF, safety (adverse events rate), clinical outcomes during admission and at 3-month follow-up (length of stay, aspiration pneumonia, nutritional [MNA-sf] and functional status [Rankin scale, Barthel], readmissions and mortality), and V-VST at 3 months.
- Additional secondary outcomes: differences in the magnitude of the effect in primary outcomes found in chronic PS phase between the tDCS (+capsaicin) and rTMS (+capsaicin) interventions.
Study Type
Enrollment (Anticipated)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Barcelona
-
Mataró, Barcelona, Spain, 08304
- Recruiting
- Hospital de Mataró. Consorci Sanitari del Mareme.
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Chronic (>3 and <24 months) unilateral hemispheric stroke adult patients.
- Patients with impaired safety of swallow with a penetration-aspiration score (PAS) ≥ 2 with videofluoroscopy (VFS).
- Patient able to follow the study protocol and give the written informed consent.
Exclusion Criteria:
- Pregnancy.
- Life expectancy less than 3m or palliative care.
- Neurodegenerative disorder.
- Previously diagnosed oropharyngeal dysphagia (dysphagia not related to stroke).
- Implanted electronic device.
- Epilepsy.
- Metal in the head.
- Participation in another clinical trial in the previous month.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: RANDOMIZED
- Interventional Model: PARALLEL
- Masking: TRIPLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: Active rTMS + capsaicin 150μM
Each session (5 consecutive days) of active treatment consists of swallowing 10mL capsaicin (150μM) and, just after, of applying focal (alpha D70 coil) rTMS (Magstim Rapid2, UK) over the pharyngeal M1 hotspot of the unaffected hemisphere.
|
Repetitive transcranial magnetic stimulation (non-invasive brain stimulation) + Capsaicin. 5 consecutive days of active treatment consists of swallowing 10mL capsaicin (150μM) and, just after, of applying focal (alpha D70 coil) rTMS (Magstim Rapid2, UK) over the pharyngeal M1 hotspot of the unaffected hemisphere. A total of 500 pulses/session are delivered consisting of 10 5Hz-trains of 10s of 50 pulses each (total 2500 pulses), with a 1min interval between trains at an intensity of 90% of the resting motor threshold (RMT). The intervention has its respective sham rTMS+placebo group that is also applied over 5 consecutive days.
Other Names:
|
OTHER: sham rTMS + placebo
The same protocol will be applied, swallowing 10mL of placebo (potassium sorbate) but with the coil tilted 90º from the tangent of the skull, as a standard method for sham rTMS application.
|
Repetitive transcranial magnetic stimulation (non-invasive brain stimulation) + Capsaicin. 5 consecutive days of active treatment consists of swallowing 10mL capsaicin (150μM) and, just after, of applying focal (alpha D70 coil) rTMS (Magstim Rapid2, UK) over the pharyngeal M1 hotspot of the unaffected hemisphere. A total of 500 pulses/session are delivered consisting of 10 5Hz-trains of 10s of 50 pulses each (total 2500 pulses), with a 1min interval between trains at an intensity of 90% of the resting motor threshold (RMT). The intervention has its respective sham rTMS+placebo group that is also applied over 5 consecutive days.
Other Names:
|
EXPERIMENTAL: active tDCS + capsaicin 150μM
Active treatment consists of swallowing 10mL capsaicin (150μM) and, just after, of applying 30min of 2.0mA tDCS (DC-Stimulator Plus, NeuroConn, Germany) with the anode placed over the pharyngeal primary motor cortex (M1) of the unaffected hemisphere (3.5cm lateral / 1cm anterior to the vertex) and the cathode over the opposite supraorbital region.
|
Transcranial direct current stimulation (non-invasive brain stimulation) + Capsaicin. Treatment consists of swallowing 10mL capsaicin (150μM) and, just after, of applying 30min of 2.0mA tDCS (DC-Stimulator Plus, NeuroConn, Germany) with the anode placed over the pharyngeal primary motor cortex (M1) of the unaffected hemisphere (3.5cm lateral / 1cm anterior to the vertex) and the cathode over the opposite supraorbital region. The intervention has its respective sham tDCS+placebo group that is also applied over 5 consecutive days.
Other Names:
|
OTHER: sham tDCS + placebo
The same protocol will be applied, swallowing 10mL of placebo (potassium sorbate) but tDCS current is ramped up over 30s in order to simulate the active tDCS and then turned off for 30min23.
Setup characteristics otherwise invariable.
|
Transcranial direct current stimulation (non-invasive brain stimulation) + Capsaicin. Treatment consists of swallowing 10mL capsaicin (150μM) and, just after, of applying 30min of 2.0mA tDCS (DC-Stimulator Plus, NeuroConn, Germany) with the anode placed over the pharyngeal primary motor cortex (M1) of the unaffected hemisphere (3.5cm lateral / 1cm anterior to the vertex) and the cathode over the opposite supraorbital region. The intervention has its respective sham tDCS+placebo group that is also applied over 5 consecutive days.
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Changes in the videofluoroscopy (signs of safety and efficacy of swallow)
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Pre- vs post-intervention changes in: - Frequency of videofluoroscopic (VFS) signs of safety and efficacy of swallow. |
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Changes in the videofluoroscopy (Penetration-Aspiration scale)
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Pre- vs post-intervention changes in: - Penetration-Aspiration scale (PAS). The scales goes from 1 (safe swallow) to 8 (silent aspiration). The severity increases as the score increases. |
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Timing of oropharyngeal swallow response (total deglutition time) with videofluoroscopy
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
- Total deglutition time (ms).
|
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Timing of oropharyngeal swallow response (time to laryngeal vestibule closure) with videofluoroscopy
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
- Time to laryngeal vestibule closure (ms).
|
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Timing of oropharyngeal swallow response (time to upper esophageal sphincter opening) with videofluoroscopy
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
- Time to upper esophageal sphincter opening (ms).
|
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Timing of oropharyngeal swallow response (bolus velocity) with videofluoroscopy
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
- Bolus velocity (m·s-1).
|
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Timing of oropharyngeal swallow response (Kinetic energy) with videofluoroscopy
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
- Kinetic energy of the bolus (mJ).
|
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Changes in neurophysiology of swallow (sensory pathway) latency
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
- Latency of pharyngeal sensory evoked potentials to intrapharyngeal electrical stimulation.
|
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Changes in neurophysiology of swallow (sensory pathway) amplitude
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
- Amplitude of pharyngeal sensory evoked potentials to intrapharyngeal electrical stimulation.
|
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Changes in neurophysiology of swallow (motor pathway) latency
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
- Latency of pharyngeal motor evoked potentials to transcranial magnetic stimulation.
|
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Changes in neurophysiology of swallow (motor pathway) amplitude
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
- Amplitude of pharyngeal motor evoked potentials to transcranial magnetic stimulation.
|
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Changes in spontaneous swallowing frequency
Time Frame: 5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Pre/post-intervention changes in spontaneous swallowing frequency (swallows/minute)
|
5 days (changes between basal visit, time 0, and post-treatment visit, time + 5 days)
|
Safety of the treatment
Time Frame: Baseline (basal visit) to 3 months follow-up
|
Safety of the treatment applied (adverse events rate) during all the study period.
|
Baseline (basal visit) to 3 months follow-up
|
Length of stay
Time Frame: Baseline (basal visit) to 3 months follow-up
|
Length of hospital stay.
|
Baseline (basal visit) to 3 months follow-up
|
Aspiration pneumonia admission
Time Frame: Baseline (basal visit) to 3 months follow-up
|
Admissions due to aspiration pneumonia during the study and at 3-month follow-up.
|
Baseline (basal visit) to 3 months follow-up
|
Nutritional status
Time Frame: Baseline (basal visit) to 3 months follow-up
|
Nutritional status (MNA-sf) at baseline and at 3-month follow-up.
|
Baseline (basal visit) to 3 months follow-up
|
Functional status
Time Frame: Baseline (basal visit) to 3 months follow-up
|
Functional status (Barthel index) at baseline and at 3-month follow-up.
|
Baseline (basal visit) to 3 months follow-up
|
Functional status associated to stroke
Time Frame: Baseline (basal visit) to 3 months follow-up
|
Rankin scale at baseline and at 3-month follow-up.
|
Baseline (basal visit) to 3 months follow-up
|
General hospital readmissions for any cause
Time Frame: Baseline (basal visit) to 3 months follow-up
|
Hospital readmissions during the study (from baseline (basal visit) to 3 months follow-up).
|
Baseline (basal visit) to 3 months follow-up
|
Mortality
Time Frame: Baseline (basal visit) to 3 months follow-up
|
Mortality over the study period (from baseline (basal visit) to 3 months follow-up).
|
Baseline (basal visit) to 3 months follow-up
|
Swallowing clinical evaluation
Time Frame: Immediately after the intervention to 3 months follow-up visit
|
Volume-viscosity swallowing test (V-VST) parameters comparison between post-treatment visit (+5 days) and 3 months follow-up visit.
|
Immediately after the intervention to 3 months follow-up visit
|
Collaborators and Investigators
Sponsor
Publications and helpful links
General Publications
- Kumar S, Wagner CW, Frayne C, Zhu L, Selim M, Feng W, Schlaug G. Noninvasive brain stimulation may improve stroke-related dysphagia: a pilot study. Stroke. 2011 Apr;42(4):1035-40. doi: 10.1161/STROKEAHA.110.602128. Epub 2011 Mar 24.
- Cabib C, Ortega O, Kumru H, Palomeras E, Vilardell N, Alvarez-Berdugo D, Muriana D, Rofes L, Terre R, Mearin F, Clave P. Neurorehabilitation strategies for poststroke oropharyngeal dysphagia: from compensation to the recovery of swallowing function. Ann N Y Acad Sci. 2016 Sep;1380(1):121-138. doi: 10.1111/nyas.13135. Epub 2016 Jul 11.
- Cabib C, Nascimento W, Rofes L, Arreola V, Tomsen N, Mundet L, Palomeras E, Michou E, Clave P, Ortega O. Short-term neurophysiological effects of sensory pathway neurorehabilitation strategies on chronic poststroke oropharyngeal dysphagia. Neurogastroenterol Motil. 2020 Sep;32(9):e13887. doi: 10.1111/nmo.13887. Epub 2020 May 24.
- Cabib C, Nascimento W, Rofes L, Arreola V, Tomsen N, Mundet L, Muriana D, Palomeras E, Michou E, Clave P, Ortega O. Neurophysiological and Biomechanical Evaluation of the Mechanisms Which Impair Safety of Swallow in Chronic Post-stroke Patients. Transl Stroke Res. 2020 Feb;11(1):16-28. doi: 10.1007/s12975-019-00701-2. Epub 2019 Apr 2.
- Cabib C, Ortega O, Vilardell N, Mundet L, Clave P, Rofes L. Chronic post-stroke oropharyngeal dysphagia is associated with impaired cortical activation to pharyngeal sensory inputs. Eur J Neurol. 2017 Nov;24(11):1355-1362. doi: 10.1111/ene.13392. Epub 2017 Sep 5.
- Nascimento W, Tomsen N, Acedo S, Campos-Alcantara C, Cabib C, Alvarez-Larruy M, Clave P. Effect of Aging, Gender and Sensory Stimulation of TRPV1 Receptors with Capsaicin on Spontaneous Swallowing Frequency in Patients with Oropharyngeal Dysphagia: A Proof-of-Concept Study. Diagnostics (Basel). 2021 Mar 7;11(3):461. doi: 10.3390/diagnostics11030461.
- Wang Z, Wu L, Fang Q, Shen M, Zhang L, Liu X. Effects of capsaicin on swallowing function in stroke patients with dysphagia: A randomized controlled trial. J Stroke Cerebrovasc Dis. 2019 Jun;28(6):1744-1751. doi: 10.1016/j.jstrokecerebrovasdis.2019.02.008. Epub 2019 Apr 5.
- Tomsen N, Ortega O, Alvarez-Berdugo D, Rofes L, Clave P. A Comparative Study on the Effect of Acute Pharyngeal Stimulation with TRP Agonists on the Biomechanics and Neurophysiology of Swallow Response in Patients with Oropharyngeal Dysphagia. Int J Mol Sci. 2022 Sep 15;23(18):10773. doi: 10.3390/ijms231810773.
- Tomsen N, Ortega O, Rofes L, Arreola V, Martin A, Mundet L, Clave P. Acute and subacute effects of oropharyngeal sensory stimulation with TRPV1 agonists in older patients with oropharyngeal dysphagia: a biomechanical and neurophysiological randomized pilot study. Therap Adv Gastroenterol. 2019 Apr 30;12:1756284819842043. doi: 10.1177/1756284819842043. eCollection 2019.
- Hamdy S, Aziz Q, Rothwell JC, Crone R, Hughes D, Tallis RC, Thompson DG. Explaining oropharyngeal dysphagia after unilateral hemispheric stroke. Lancet. 1997 Sep 6;350(9079):686-92. doi: 10.1016/S0140-6736(97)02068-0.
- Park JW, Oh JC, Lee JW, Yeo JS, Ryu KH. The effect of 5Hz high-frequency rTMS over contralesional pharyngeal motor cortex in post-stroke oropharyngeal dysphagia: a randomized controlled study. Neurogastroenterol Motil. 2013 Apr;25(4):324-e250. doi: 10.1111/nmo.12063. Epub 2012 Dec 23.
- Kobayashi M, Pascual-Leone A. Transcranial magnetic stimulation in neurology. Lancet Neurol. 2003 Mar;2(3):145-56. doi: 10.1016/s1474-4422(03)00321-1.
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ANTICIPATED)
Study Completion (ANTICIPATED)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ACTUAL)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Digestive System Diseases
- Cardiovascular Diseases
- Vascular Diseases
- Cerebrovascular Disorders
- Brain Diseases
- Central Nervous System Diseases
- Nervous System Diseases
- Gastrointestinal Diseases
- Pharyngeal Diseases
- Otorhinolaryngologic Diseases
- Esophageal Diseases
- Stroke
- Deglutition Disorders
- Physiological Effects of Drugs
- Peripheral Nervous System Agents
- Sensory System Agents
- Dermatologic Agents
- Antipruritics
- Capsaicin
Other Study ID Numbers
- STROD_ICI_C
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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