Effect of Surface Electrical Stimulation on Movement of the Larynx
|First Submitted Date||February 17, 2005|
|First Posted Date||February 18, 2005|
|Last Update Posted Date||March 4, 2008|
|Start Date||February 2005|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures||Not Provided|
|Original Primary Outcome Measures||Not Provided|
|Change History||Complete list of historical versions of study NCT00104000 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures||Not Provided|
|Original Secondary Outcome Measures||Not Provided|
|Current Other Outcome Measures||Not Provided|
|Original Other Outcome Measures||Not Provided|
|Brief Title||Effect of Surface Electrical Stimulation on Movement of the Larynx|
|Official Title||The Effect of Surface Electrical Stimulation on Hyo-Laryngeal Movement in Healthy Individuals at Rest and During Swallow|
This study will examine whether surface electrical stimulation on the skin of the throat will: 1) move the larynx (voice box); 2) move the vocal folds in the larynx; and 3) cause less movement of the larynx when applied during swallowing. It is important that the larynx moves up and forward while swallowing so that food does not go into the airway. A device called VitalStim® (Registered Trademark), which provides electrical stimulation to the skin on the neck and under the chin, is widely used to treat people who have problems swallowing. This study will determine if VitalStim can move the voice box or the vocal folds in the larynx. This information is important for patients who have long-term problems raising or closing their larynxes when they swallow.
Healthy volunteers between 20 and 60 years of age may be eligible for this study. Candidates are screened with a medical history, physical examination, electrocardiogram, and nasoendoscopy. For the latter procedure, the inside of the subject's nose is sprayed with a decongestant, opening the nasal passages. A small flexible tube called a nasoendoscope is passed through the nose to the back of the throat. The scope allows observation of the larynx while the subject speaks, sings, whistles and makes prolonged vowel sounds.
Participants are familiarized with the VitalStim device before beginning the experimental procedures. The device consists of two sets of electrodes and a stimulation unit. The electrodes are placed on the neck and under the chin. Stimulation causes different sensations, according to the intensity level. They include "tingling/crawling," "vibrating" "warm/burning," and "grabbing." Subjects then undergo the following procedures:
The purpose of the current study is to determine whether:
Study Population: healthy adults
Design: This study will employ a repeated measures design. Surface electrodes will be used to stimulate submental and laryngeal muscles either alone or in combination both at rest and during swallowing while using videofluoroscopy and nasolaryngoscopy to record hyo-laryngeal movement.
Outcome Measures: Kinematic analyses of hyo-laryngeal movements using image processing and marking from video-recordings will quantify movement with stimulation.
|Study Design||Not Provided|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Study Groups/Cohorts||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Estimated Completion Date||January 2006|
|Primary Completion Date||Not Provided|
The Healthy volunteers will be without cardiac, pulmonary, neurological, otolaryngological, psychiatric or speech, swallowing and hearing problems as determined by medical history and examination by a physician.
|Ages||Child, Adult, Senior|
|Accepts Healthy Volunteers||Yes|
|Contacts||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries||United States|
|Removed Location Countries|
|Other Study ID Numbers||050099
|Has Data Monitoring Committee||Not Provided|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor||National Institute of Neurological Disorders and Stroke (NINDS)|
|PRS Account||National Institutes of Health Clinical Center (CC)|
|Verification Date||January 2006|