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thyroid superior laryngeal nerve

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https://www.readbyqxmd.com/read/29142848/injury-of-the-external-branch-of-the-superior-laryngeal-nerve-in-thyroid-surgery
#1
REVIEW
Andre S Potenza, Vergilius J F Araujo Filho, Claudio R Cernea
The external branch of the superior laryngeal nerve (EBSLN) innervates the cricothyroid muscle (CTM) to promote lengthening and thinning of the vocal fold, thus increasing voice pitch. The close relation with the superior thyroid vessels (STV) puts the EBSLN in risk every time the superior pole of the thyroid is dissected. It travels downward to innervate the CTM, lateral to the thyroid cartilage and to the inferior pharyngeal constrictor muscle (IPCM), being eventually covered by this muscle fibers as it approaches its entry point...
October 2017: Gland Surgery
https://www.readbyqxmd.com/read/29142846/opportunities-and-challenges-of-intermittent-and-continuous-intraoperative-neural-monitoring-in-thyroid-surgery
#2
REVIEW
Rick Schneider, Andreas Machens, Gregory W Randolph, Dipti Kamani, Kerstin Lorenz, Henning Dralle
The number of thyroid operations and there radically continues to rise in the western hemisphere, bringing prevention of recurrent laryngeal nerve (RLN) palsy to the fore. Overall, the incidence of RLN palsy is fairly low but continues to prompt litigation for malpractice. In an effort to diminish transient, and more importantly permanent, RLN palsy rates, intraoperative neuromonitoring (IONM) has been advocated as a risk minimization tool. Recent meta-analyses of studies, many of which were limited by poor study design and the sole use of intermittent nerve stimulation, were unable to demonstrate superiority of IONM over mere anatomic RLN dissection...
October 2017: Gland Surgery
https://www.readbyqxmd.com/read/29124354/parathyroid-thyroid-and-recurrent-laryngeal-nerve-anatomy-in-an-indian-rhinoceros-rhinoceros-unicornis
#3
R Udelsman, S B Citino, M Prasad, P I Donovan, D V Fredholm
INTRODUCTION: The parathyroid gland was first identified in the Indian rhinoceros in 1849 by Sir Richard Owen. We performed a necropsy in an Indian rhinoceros, recapitulating Owen's dissection and display what appear to be the initial identification of the recurrent laryngeal nerve in situ and the anatomy and histology of the largest rhinoceros parathyroid glands yet identified. MATERIALS AND METHODS: Patrick T. Rhino, a 41-year-old Indian rhinoceros was born in 1974...
November 9, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/29098260/-applications-of-ultrasound-guided-superior-laryngeal-nerve-block-and-cricothyroid-membrane-puncture-in-conscious-endotracheal-intubation
#4
Jun-An Wang, Yu Sun, Yan Huang, Hong Jiang
PURPOSE: To explore the clinical value of ultrasound-guided superior laryngeal nerve block and cricothyroid membrane puncture in conscious endotracheal intubation. METHODS: Thirty ASA classⅠorII patients scheduled for selective surgeries were randomly divided into 2 groups, Group U was ultrasound-guided group (n=15), group A was anatomical location group (n=15). Transnasal tracheal intubation was performed in all patients. In patient of group U, thyrohyoid membrane was shown hyperecho by ultrasound and echoless superior laryngeal artery passed across it...
June 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/29097790/anatomy-of-the-external-branch-of-the-superior-laryngeal-nerve-in-asian-population
#5
Yong Hoon Cha, Seo-Young Moon, O Jehoon, Tanvaa Tansatit, Hun-Mu Yang
Injury to the external branch of the superior laryngeal nerve (eSLN) can cause a hoarse or weak voice with dysergia of the cricothyroid. The present study provided the topographic information of the eSLN in the Asian and verified anatomical validity of the landmarks previously recruited to localize the eSLN. Thirty specimens were dissected from 16 human embalmed cadavers (12 men and four women; mean age: 80.5 years). The vertical distance between the eSLN and the apical pole of the thyroid gland (AP) was 8...
November 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29046798/monitoring-of-recurrent-and-superior-laryngeal-nerve-function-using-an-airwayscope%C3%A2-during-thyroid-surgery
#6
Kei Ijichi, Hiroshi Sasano, Megumi Harima, Shingo Murakami
In thyroid surgery, intraoperative identification and preservation of the recurrent laryngeal nerve (RLN) and superior laryngeal nerve external branch (SLNEB) are crucial. Several reports have proposed that electromyography (EMG) monitoring is an acceptable adjunct for identification and preservation of the RLN. However, a limited number of hospitals have access to an EMG monitoring system. Therefore, the development of another viable monitoring method is required. The aim of the present study was to design a new RLN and SLNEB monitoring method combining an Airwayscope™ (AWS) and a facial nerve stimulator...
October 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/29030129/laryngeal-and-vocal-alterations-after-thyroidectomy
#7
Renata Mizusaki Iyomasa, José Vicente Tagliarini, Sérgio Augusto Rodrigues, Elaine Lara Mendes Tavares, Regina Helena Garcia Martins
INTRODUCTION: Dysphonia is a common symptom after thyroidectomy. OBJECTIVE: To analyze the vocal symptoms, auditory-perceptual and acoustic vocal, videolaryngoscopy, the surgical procedures and histopathological findings in patients undergoing thyroidectomy. METHODS: Prospective study. Patients submitted to thyroidectomy were evaluated as follows: anamnesis, laryngoscopy, and acoustic vocal assessments. Moments: pre-operative, 1st post (15 days), 2nd post (1 month), 3rd post (3 months), and 4th post (6 months)...
September 21, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28986621/modification-of-the-surgical-strategy-for-the-dissection-of-the-recurrent-laryngeal-nerve-using-continuous-intraoperative-nerve-monitoring
#8
Andres Marin Arteaga, Giuseppe Peloni, Igor Leuchter, Benoit Bedat, Wolfram Karenovics, Frederic Triponez, Samira Mercedes Sadowski
BACKGROUND: The aim of this study was to describe first experiences and changes in management using continuous intraoperative neuromonitoring (C-IONM) in thyroid and parathyroid surgery. METHOD: Retrospective analysis of patients who underwent surgery with C-IONM since 2012. Surgical maneuvers were modified when electrophysiologic events occurred. Patients with persistent loss of signal (LOS) underwent postoperative laryngoscopy. RESULTS: One hundred and one patients (of 1586 neck surgeries) were included and 19 had events: In 13 these were temporary (resolved before end of surgery) and led to intraoperative modifications in surgical approach; in all cases traction was released, and in 8, recurrent laryngeal nerve (RLN) approach was changed [superior approach (2), inferior approach (2), both (4)]...
October 6, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28952819/intraoperative-monitoring-of-external-branch-of-the-superior-laryngeal-nerve-functional-identification-motor-integrity-and-its-role-on-vocal-cord-function
#9
Emin Gurleyik, Gunay Gurleyik
PURPOSE: Beside recurrent laryngeal nerve (RLN), protection of the external branch of the superior laryngeal nerve (EBSLN) is required for complication-free thyroid surgery. This study investigates the contribution of intraoperative neuromonitoring (IONM) to identification and motor integrity of the EBSLN. METHODS: This prospective study was performed on 245 EBSLNs in 147 patients with thyroid surgery. The rate of visual identification, contribution of IONM to functional localization, the rate and levels of recordable waveform amplitude from vocal cord (VC) movement were determined during surgery...
September 27, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28944328/contribution-of-intraoperative-neuromonitoring-to-the-identification-of-the-external-branch-of-superior-laryngeal-nerve
#10
Nurcihan Aygün, Mehmet Uludağ, Adnan İşgör
OBJECTIVE: We evaluated the contribution of intraoperative neuromonitoring to the visual and functional identification of the external branch of the superior laryngeal nerve. MATERIAL AND METHODS: The prospectively collected data of patients who underwent thyroid surgery with intraoperative neuromonitoring for external branch of the superior laryngeal nerve exploration were assessed retrospectively. The surface endotracheal tube-based Medtronic NIM3 intraoperative neuromonitoring device was used...
2017: Turk J Surg
https://www.readbyqxmd.com/read/28917827/recommendations-on-the-use-of-neuromonitoring-in-thyroid-and-parathyroid-surgery
#11
José Luis Pardal-Refoyo, Pablo Parente-Arias, Marta María Arroyo-Domingo, Juan Manuel Maza-Solano, José Granell-Navarro, Jesús María Martínez-Salazar, Ramón Moreno-Luna, Elvylins Vargas-Yglesias
INTRODUCTION: Thyroid and parathyroid surgery (TPTS) is associated with risk of injury to the recurrent laryngeal nerve, superior laryngeal nerve and voice changes. Intraoperative neuromonitoring (IONM), intermittent or continuous, evaluates the functional state of the laryngeal nerves and is being increasingly used. This means that points of consensus on the most controversial aspects are necessary. OBJECTIVE: To develop a support document for guidance on the use of IONM in TPTS...
September 14, 2017: Acta Otorrinolaringológica Española
https://www.readbyqxmd.com/read/28776686/contralateral-r1-and-r2-components-of-the-laryngeal-adductor-reflex-in-humans-under-general-anesthesia
#12
Catherine F Sinclair, Maria J Téllez, Oscar R Tapia, Sedat Ulkatan
OBJECTIVES: To demonstrate that under total intravenous general anesthesia (TIVA), the contralateral R1 (cRI) and contralateral R2 (cR2) components of the laryngeal adductor reflex (LAR) can be reliably elicited; to determine effects of topical anesthesia and inhalational anesthesia on the LAR; and to discuss how this technique may be utilized to continuously monitor the vagus nerve reflex arc. STUDY DESIGN: Case series. METHODS: Vocal fold mucosa was electrically stimulated via endotracheal tube surface-based electrodes to elicit a LAR...
August 4, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28759458/pharyngolaryngeal-symptoms-associated-with-thyroid-disease
#13
Inn-Chul Nam, Young-Hak Park
PURPOSE OF REVIEW: The current review summarizes previous reports on laryngopharyngeal symptoms associated with thyroid disease. This review also includes pharyngolaryngeal symptoms caused by thyroidectomy. However, we focus on pharyngolaryngeal symptoms following uncomplicated thyroidectomy, as this is an important issue in the fields of otolaryngology. RECENT FINDINGS: An enlarged thyroid gland, as in thyroiditis, multinodular goiter, or large nodules, can cause compressive symptoms...
December 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28713236/modulation-of-calcitonin-parathyroid-hormone-and-thyroid-hormone-secretion-by-electrical-stimulation-of-sympathetic-and-parasympathetic-nerves-in-anesthetized-rats
#14
Harumi Hotta, Akiko Onda, Harue Suzuki, Philip Milliken, Arun Sridhar
The thyroid and parathyroid glands are dually innervated by sympathetic (cervical sympathetic trunk [CST]) and parasympathetic (superior laryngeal nerve [SLN]) nerve fibers. We examined the effects of electrical stimulation of efferent or afferent nerve fibers innervating the thyroid and parathyroid glands on the secretion of immunoreactive calcitonin (iCT), parathyroid hormone (iPTH), 3,3',5-triiodothyronine (iT3), and thyroxine (iT4) from the thyroid and parathyroid glands. In anesthetized and artificially ventilated rats, thyroid venous blood was collected...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28687919/superior-laryngeal-nerve-in-thyroid-surgery-anatomical-identification-and-monitoring
#15
M Gavid, M D Dubois, E Larivé, J M Prades
The aim of this study was to validate a procedure to identify and preserve the external branch of the superior laryngeal nerve (EBSLN) during thyroid surgery. The present study also aimed to analyze the EBSLN and the vagus nerve activities after stimulation and demonstrate an operative association between all the laryngeal muscles. Dissection of the cervical region was performed bilaterally in four adult cadavers. In a second step, 144 patients undergoing total thyroidectomy were included. Intraoperative stimulations of the cervical vagus nerve and the EBSLN in the sternothyroid-laryngeal triangle were performed bilaterally...
July 7, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28679839/vibration-over-the-larynx-increases-swallowing-and-cortical-activation-for-swallowing
#16
Rachel W Mulheren, Christy L Ludlow
Sensory input can alter swallowing control in both the cortex and brainstem. Electrical stimulation of superior laryngeal nerve afferents increases reflexive swallowing in animals, with different frequencies optimally effective across species. Here we determined 1) if neck vibration overlying the larynx affected the fundamental frequency of the voice demonstrating penetration of vibration into the laryngeal tissues, and 2) if vibration, in comparison with sham, increased spontaneous swallowing and enhanced cortical hemodynamic responses to swallows in the swallowing network...
September 1, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28624166/retrograde-thyroidectomy-for-preservation-of-the-external-branch-of-the-superior-laryngeal-nerve-a-case-series
#17
Vijay Naraynsingh, Shamir Cawich, Dale Hassranah, Ravi Maharaj, Shariful Islam, Yardesh Singh
BACKGROUND: The external branch of the Superior Laryngeal nerve (EBSLN) is at high risk of injury in surgery for large multinodular goitre (MNG) since the upper pole is high in the neck, well cephalad to the EBSLN. We present a technique of drawing the lobe caudally by retrograde thyroidectomy in order to minimize nerve injury. DESIGN & METHOD: All patients having surgery for benign MNG were included. Cases with previous thyroid surgery, malignant and toxic disease were excluded...
May 15, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28577534/a-novel-variation-of-the-recurrent-laryngeal-nerve
#18
Gaosong Wu, Kun Wang
BACKGROUND: Injury to the recurrent laryngeal nerve is one of the most severe complications of thyroid surgery. Several anatomic variations of the nerve increase the likelihood of iatrogenic damage. CASE PRESENTATION: A 50-year-old woman was presented to our department with a nodule in the right thyroid lobe, and she reported no voice changes. She had no history of surgery or radiation to the head or neck. Fine-needle aspiration was recorded as papillary thyroid carcinoma...
June 2, 2017: BMC Surgery
https://www.readbyqxmd.com/read/28493593/superior-parathyroid-gland-approach-to-the-recurrent-laryngeal-nerve
#19
Ezzeddin Elsheikh
BACKGROUND: The superior parathyroid gland is known to be almost constant in its location under the false thyroid capsule. Could it be a landmark to point to the site of incision of the false thyroid capsule and find the plane of the recurrent laryngeal nerve (RLN) during thyroidectomy? METHODS: The study included 48 patients with benign goiter scheduled for hemithyroidectomy or total thyroidectomy; there were 16 cases of solitary thyroid nodules, 27 cases of multinodular goiter, and 5 cases of toxic goiter...
July 2017: Head & Neck
https://www.readbyqxmd.com/read/28466363/the-identification-preservation-and-classification-of-the-external-branch-of-the-superior-laryngeal-nerve-in-thyroidectomy
#20
Kun Wang, Huilan Cai, Deguang Kong, Qiuxia Cui, Dan Zhang, Gaosong Wu
BACKGROUND: Avoiding injury to the external branch of the superior laryngeal nerve is one of the major challenges during thyroid operation. The aim of this study was to propose a practical classification of the external branch of the superior laryngeal nerve. METHODS: A retrospective study of total thyroidectomy was performed. Totally 240 patients were included, with 480 external branches of the superior laryngeal nerves explored by intraoperative neuromonitoring...
May 2, 2017: World Journal of Surgery
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