Electric pacing device aims to restore breathing and voice in paralyzed larynx patients
NCT ID NCT04028674
First seen Jun 27, 2026 · Last updated Jul 30, 2026 · Updated 2 times
Summary
This study tests a new device that electrically stimulates the voice box muscles in people with bilateral vocal fold paralysis, a condition where both vocal cords are stuck closed. The main goal is to see if the device is safe and can improve breathing and voice quality. Eight adults will be implanted with the device and monitored for changes in airflow, voice, and exercise ability.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 8 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2021
- Expected to finish
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Dec 2028
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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22 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Provision of signed and dated informed consent form. * Willingness to comply with all study procedures and availability for the duration of the study. * Male or female adult patients, 22 years of age or older. * Diagnosis of one of the following at least ten months prior to study enrollment: * Complete bilateral vocal fold paralysis, with suspected etiological event occurring at least ten months prior to study enrollment. Diagnosis will be documented via medical records and confirmed during the onsite screening visit by a Vanderbilt board certified laryngologist via endoscopy, electromyography and direct laryngoscopy. * Incomplete bilateral vocal fold paralysis (severe paresis) which significantly impedes respiration may also be considered for participation under the same conditions and per physician recommendation. Patients must present with an NGA less than 20, representing severe laryngeal obstruction. Diagnosis will be documented via medical records and confirmed during the onsite screening visit by a Vanderbilt board certified laryngologist via endoscopy, electromyography, and direct laryngoscopy. * Patients receiving repeated botulinum toxin (botox) injections into the thyroarytenoid muscle to treat BVFP may be eligible for participation per physician recommendation. * Demonstrated glottal opening bilaterally (abductory response) upon percutaneous needle stimulation of PCA muscles (i.e. mean NGA ≥0.05 per vocal fold tested). * Patients who have previously undergone a recurrent laryngeal nerve reinnervation procedure may be eligible for participation per physician recommendation. Patients must have undergone the laryngeal nerve reinnervation surgery at least 10 months prior to enrollment in the laryngeal pacing study. * Patients who have previously undergone a recurrent laryngeal nerve reinnervation procedure may be eligible for participation per physician recommendation. Patients must have undergone the laryngeal nerve reinnervation surgery at least 10 months prior to enrollment in the laryngeal pacing study. * Patients with or without a tracheostomy * Demonstrated glottal opening bilaterally (abductory response) upon percutaneous needle stimulation of PCA muscles (i.e. mean NGA ≥0.05 per vocal fold tested). Exclusion Criteria: * Any active illness that is associated with an auto-immune disorder (such as diabetes). * History of cardiac dysrhythmias or implanted cardiac pacemaker. * Cardiac irregularities identified in screening electrocardiogram. * Any electronic implanted medical device that, in the investigator's opinion, could interact with the laryngeal pacemaker. * Active cardiac disease manifested by unstable angina, recent myocardial infarction, malignant arrhythmias, uncontrolled hypertension (diastolic greater than 110), or decompensated congestive heart failure. * Patients with underlying comorbidities that, in the investigator's opinion, could potentially warrant a need for oxygen therapy, including but not limited to: Chronic obstructive pulmonary disease, asthma, emphysema, recurrent bronchitis, pneumonia or interstitial lung disease. * Bilateral laryngeal immobility from stenosis or arthritis. * Poor surgical risk patients as determined by the treating surgeon or Vanderbilt Preoperative Evaluation Center (VPEC). * The abundance of interstitial fat may impede the surgical dissection. In the opinion of the principal investigator or treating physician(s), patients with factors that may complicate the surgical intervention will be excluded. * Known allergy to barium dye or anesthetics. * Known allergy to any of the device materials. * History of aspiration pneumonia, secondary to bilateral vocal fold paralysis * Persistent thin liquid dysphagia despite standard of care dysphagia management strategies (e.g. small sips, chin tuck, etc.) * Presence of significant tracheal narrowing. * Any anatomical abnormality that would jeopardize safe implantation, per the surgeon. * Any medical condition, that in the opinion of the principal investigator or treating physician would jeopardize the outcome or welfare of the participant. * Any previous medical treatment that in the opinion of the principal investigator or treating physician would confound the effects of laryngeal pacing. * Females who are pregnant or plan a pregnancy within 2 years. A pregnancy test will be done as part of the routine pre-operative assessment for all females of child-bearing potential.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Vanderbilt University Medical Center
Nashville, Tennessee, 37232, United States