Innervation of Human Cricopharyngeal Muscle By Recurrent Laryngeal and External Branch of Superior Laryngeal Nerve
NCT ID: NCT02761239
Last Updated: 2016-05-04
Study Results
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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COMPLETED
NA
100 participants
INTERVENTIONAL
2015-02-28
2015-11-30
Brief Summary
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Detailed Description
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EMG recordings were accomplished with a pair of needle electrodes inserted into the CP and mid-portion of the CT muscle that is located on the superior side of the RLN, which were plugged into the third and fourth channels of interface-connector box, respectively, at the end of the thyroidectomy or lobectomy. The investigators evaluated the innervation pattern of the CT muscle in an other study. Therefore the EBSLN is the main supplier of the CT muscle, the EMG findings of the CT muscle were used to confirm it, in this study.
EBSLN, pharyngeal plexus (PP), RLN and vagus nerve were stimulated with a monopolar stimulator probe at 1 mA. While stimulating these nerves, the ipsilateral CP muscle was visually observed for possible contractions and electromyographic recordings were obtained with the 4-channel NIM 3.0 Nerve Monitoring System.
Conditions
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Study Design
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NA
SINGLE_GROUP
BASIC_SCIENCE
NONE
Study Groups
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Cricopharyngeal muscle innervation
The recurrent laryngeal nerve (RLN), vagus nerve, external branch of the superior laryngeal nerve (EBSLN) and pharyngeal plexus were stimulated intraoperatively by the NIM 3.0 Nerve Monitoring System (Medtronic Xomed, Jacksonville, FL, USA). Responses were evaluated by visual observation of the cricopharyngeal muscle and electromyographies via needle electrodes inserted into the cricopharyngeal muscle.
The NIM 3.0 Nerve Monitoring System
Electromyography recordings were accomplished with a pair of needle electrodes inserted through the CP muscle, which were plugged into the third and fourth channels of interface-connector box.The recurrent laryngeal nerve(RLN), vagus nerve, external branch of the superior laryngeal nerve(EBSLN) and pharyngeal plexus were stimulated with a current of 1 mA and a frequency of 4 MHz and the event threshold at 100 microV.
Interventions
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The NIM 3.0 Nerve Monitoring System
Electromyography recordings were accomplished with a pair of needle electrodes inserted through the CP muscle, which were plugged into the third and fourth channels of interface-connector box.The recurrent laryngeal nerve(RLN), vagus nerve, external branch of the superior laryngeal nerve(EBSLN) and pharyngeal plexus were stimulated with a current of 1 mA and a frequency of 4 MHz and the event threshold at 100 microV.
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
* Thyroid cancer with massive extrathyroidal extension
* Intentional nerve transection because of cancer invasion
* The assessment failure of nerve function due to the technical deficiency of the IONM equipment
18 Years
80 Years
ALL
No
Sponsors
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Sisli Hamidiye Etfal Training and Research Hospital
OTHER
Responsible Party
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Mehmet Uludag
Associated Professor
Principal Investigators
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Mehmet Uludag, Professor
Role: STUDY_DIRECTOR
Sisli Etfal Training and Research Hospital
References
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Mu L, Sanders I. Neuromuscular specializations within human pharyngeal constrictor muscles. Ann Otol Rhinol Laryngol. 2007 Aug;116(8):604-17. doi: 10.1177/000348940711600809.
Sasaki CT, Kim YH, Sims HS, Czibulka A. Motor innervation of the human cricopharyngeus muscle. Ann Otol Rhinol Laryngol. 1999 Dec;108(12):1132-9. doi: 10.1177/000348949910801207.
Brok HA, Copper MP, Stroeve RJ, Ongerboer de Visser BW, Venker-van Haagen AJ, Schouwenburg PF. Evidence for recurrent laryngeal nerve contribution in motor innervation of the human cricopharyngeal muscle. Laryngoscope. 1999 May;109(5):705-8. doi: 10.1097/00005537-199905000-00005.
Halum SL, Shemirani NL, Merati AL, Jaradeh S, Toohill RJ. Electromyography findings of the cricopharyngeus in association with ipsilateral pharyngeal and laryngeal muscles. Ann Otol Rhinol Laryngol. 2006 Apr;115(4):312-6. doi: 10.1177/000348940611500411.
Oezcelik A, DeMeester SR. General anatomy of the esophagus. Thorac Surg Clin. 2011 May;21(2):289-97, x. doi: 10.1016/j.thorsurg.2011.01.003.
Mu L, Sanders I. The innervation of the human upper esophageal sphincter. Dysphagia. 1996 Fall;11(4):234-8. doi: 10.1007/BF00265207.
Prades JM, Timoshenko AP, Asanau A, Gavid M, Benakki H, Dubois MD, Faye MB, Martin C. [The cricopharyngeal muscle and the laryngeal nerves: contribution to the functional anatomy of swallowing]. Morphologie. 2009 Aug-Sep;93(301):35-41. doi: 10.1016/j.morpho.2009.07.001. Epub 2009 Oct 7. French.
Other Identifiers
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SEEAH02
Identifier Type: -
Identifier Source: org_study_id
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