scholarly journals Application of the original method of intra-operative electrophysiological stimulation of recurrent laryngeal nerve with surgical interventions on the neck organs

2020 ◽  
Vol 179 (3) ◽  
pp. 19-24
Author(s):  
Yu. V. Kovalenko ◽  
A. S. Tolstokorov ◽  
S. N. Kotov ◽  
G. A. Manakhov ◽  
E. N. Kurochkina
Keyword(s):  
Recurrent Laryngeal Nerve ◽  
Functional Activity ◽  
Control Method ◽  
Intraoperative Complications ◽  
Original Method ◽  
Laryngeal Nerve ◽  
The Body ◽  
Surgical Interventions ◽  
Laryngeal Nerves ◽  
Recurrent Laryngeal Nerves

The OBJECTIVE was the reduction in the frequency of specific complications of surgical treatment of patients with pathology of the thyroid and parathyroid glands using the original method of monitoring the neuro-functional activity of the recurrent laryngeal nerve.METHODS AND MATERIALS. The research was conducted in two stages. At the first stage, the object of the topographic-anatomical study was 50 male and female corpses. The research, based on the fixed material, was focused upon the study of the anatomic special features of recurrent laryngeal nerves, their relations with neighboring structures, the study of peculiarities of recurrent laryngeal nerve syntopy and its neighboring structures to find the least traumatic way of incision during electroneurophysiological monitoring of activity. At the second stage, the object of the study was 60 patients with a benign pathology of the thyroid gland, who were operated on with the use of the original method of intra-operational visualization and control method over neuro-functional activity of recurrent laryngeal nerve.RESULTS. The frequency of the three different variants of topographic-anatomical position of recurrent laryngeal nerve depends on the side of the body. The safest, stable and the fastest one to be found is the left recurrent laryngeal nerve. Postoperative unilateral paresis of the larynx, diagnosed in 4 of 60 patients, is regarded as postischemic. Two-sided paresis of the larynx was diagnosed in 1 patient.CONCLUSION. This method allows to minimize the development of severe intraoperative complications, to reduce the frequency of postoperative paralysis and paresis of the larynx. Intra-operative visualization of recurrent laryngeal nerves is especially necessary during the repeated surgeries with postoperative scar transformations with wrong syntopy of neck organs and vascular-nerve structures, which makes it possible to minimize the number of postoperative paralyses and paresis of larynx and to get positive effect without carrying out the intubation of trachea among patients with postoperative paralysis of larynx or stenosis, and to avoid more serious damage of larynx or trachea in case of intubation.

scholarly journals Identifying Recurrent Laryngeal Nerve in Thyroid Surgery Using Relationship with Superior Parathyroid Gland and Tubercle of Zuckerkandl

2015 ◽  
Vol 23 (3) ◽  
pp. 99-103
Author(s):  
Somesh Mozumder ◽  
Shirish Dubey ◽  
Aniruddha Dam ◽  
Anup Kumar Bhowmick
Keyword(s):  
Prospective Study ◽  
Recurrent Laryngeal Nerve ◽  
Parathyroid Gland ◽  
Thyroid Surgery ◽  
Intimate Relationship ◽  
Laryngeal Nerve ◽  
Laryngeal Nerves ◽  
Recurrent Laryngeal Nerves ◽  
A Prospective Study ◽  
Relationship Of

Introduction: Recurrent laryngeal nerves (RLN) are particularly prone to injury during thyroid surgeries due to its intimate relationship and proximity with the gland. Zuckerkandl’s tubercle (ZT) helps in preserving RLN intra operative. Material and Methods: A prospective study for identifying RLN in thyroid surgery using relationship with superior parathyroid gland and tubercle of Zuckerkandl was conducted on 50 thyroidectomy patients between August 2013 and February 2014. Results: In all cases ZT was identified. Temporary paralysis of RLN was seen in 3 (6%) cases and permanent paralysis in 2 (4%) of cases. Discussion: The site of greatest risk during thyroidectomy to the RLN is in the last 2-3 cm extralaryngeal course of the nerve. Relationship of recurrent laryngeal nerve with superior parathyroid gland and tubercle of Zukerkandl (ZT) is known. Conclusion: Use of ZT and superior parathyroids as a landmark allows safe dissection of RLN.

Characteristic travelling patterns of non-recurrent laryngeal nerves

2014 ◽  
Vol 128 (6) ◽  
pp. 534-539 ◽  
Author(s):  
K H Hong ◽  
H T Park ◽  
Y S Yang
Keyword(s):  
Computed Tomography ◽  
Recurrent Laryngeal Nerve ◽  
Subclavian Artery ◽  
Vocal Fold ◽  
Laryngeal Nerve ◽  
New Classification ◽  
Laryngeal Nerves ◽  
Brachiocephalic Trunk ◽  
Recurrent Laryngeal Nerves ◽  
The Right

AbstractBackground:The non-recurrent laryngeal nerve is subject to potential injury during thyroid surgery. Intra-operative identification and preservation of this nerve can be challenging. Its presence is associated with an aberrant subclavian artery and the developmental absence of the brachiocephalic trunk. This study aimed to evaluate the incidence of non-recurrent laryngeal nerves and present a new classification system for the course of these nerves.Methods:Non-recurrent laryngeal nerves were identified on the right side in 15 patients who underwent thyroidectomy. The incidence of non-recurrent laryngeal nerves (during thyroidectomy) and aberrant subclavian arteries (using neck computed tomography) was evaluated, and the course of the nerves was classified according to their travelling patterns.Results:The overall incidence of non-recurrent laryngeal nerves was 0.68 per cent. The travelling patterns of the nerves could be classified as: descending (33 per cent), vertical (27 per cent), ascending (20 per cent) or V-shaped (20 per cent).Conclusion:Clinicians need to be aware of these variations to avoid non-recurrent laryngeal nerve damage. A retroesophageal subclavian artery (on neck computed tomography) virtually assures a non-recurrent laryngeal nerve. This information is important for preventing vocal fold paralysis. Following a review of non-recurrent laryngeal nerve travelling patterns, a new classification was devised.

scholarly journals The Recurrent Laryngeal Nerve in Relation to the Inferior Thyroid Artery in Adult Filipino Cadavers

2011 ◽  
Vol 26 (2) ◽  
pp. 13-17 ◽  
Author(s):  
Jacob S. Matubis ◽  
Karen June P. Dumlao ◽  
Ryner Jose C. Carrillo
Keyword(s):  
Recurrent Laryngeal Nerve ◽  
Thyroid Surgery ◽  
Anatomical Variations ◽  
The Philippines ◽  
Laryngeal Nerve ◽  
Inferior Thyroid Artery ◽  
Laryngeal Nerves ◽  
Recurrent Laryngeal Nerves ◽  
The Right ◽  
Relationship Of

Objective: To describe the anatomic relationship of the recurrent laryngeal nerve and the inferior thyroid artery in adult cadavers in the Philippines and to compare the proportions of these anatomic relationships with those reported in the foreign literature. Methods: Study design: Descriptive, cross-sectional Setting: University of the Philippines College of Medicine Anatomy Laboratory Subjects: Fifty-four (54)  preserved cadavers (108 sides) dissected within a period from June 2008 to Aug 2010. The anatomy and position of both  the right and the left recurrent laryngeal nerves (RLN) and inferior thyroid arteries (ITA) were noted. The RLN was further classified into 2 variations: non-branching or branching prior to insertion at the cricothyroid joint, under the inferior constrictor muscle.  The ITA was also classified into non-branching and branching.  The results were compared to two foreign studies using a Z-test for two proportions. Results: Fifty four (54) cadavers (108) sides were dissected. Among the  cadavers, both the recurrent laryngeal nerves and inferior thyroid arteries had a maximum of two branches although both the RLNs and ITAs for both the right and left sides were mostly non-branching. The right side of one cadaver was noted to have both a branching RLN and a branching ITA. There were no non-recurrent laryngeal nerves seen among the 54 cadavers. For both left and right sides, the RLN was mostly dorsal to the ITA. Branching RLNs was mostly dorsal to a non-branching ITAs. Most of the non-branching RLNs were dorsal to the ITAs. Non-branching RLNs were usually dorsal to the ITA.               The local patterns of the course of the RLN in relation to the ITA approximates those of Chinese where there is predominance of the RLN dorsal to the ITA  but differs from those of Brazilians where the RLN is usually between ITA branches.    Conclusion: There are multiple anatomical variations with regards to the relationship of the RLN and the ITA. The anatomic variation among Asians may be different from Brazilians. The surgeon’s knowledge of the possible various configurations of the RLN and ITA should be able to help in identification and preservation of the RLN and prevention of complications in thyroid surgery. Keywords: recurrent laryngeal nerve, inferior thyroid  artery, thyroid surgery, Filipino cadavers, anatomical variations

scholarly journals The Effect of Intraoperative Neuromonitoring on Damage to the Laryngeal Nerves in Patients Undergoing Total Thyroidectomy.

2021 ◽  
Author(s):  
Piotr Bryk ◽  
Stanisław Głuszek
Keyword(s):  
Recurrent Laryngeal Nerve ◽  
Total Thyroidectomy ◽  
Nodular Goiter ◽  
Intraoperative Neuromonitoring ◽  
Laryngeal Nerve ◽  
Control Group ◽  
Study Group ◽  
Laryngeal Nerves ◽  
Recurrent Laryngeal Nerves

Abstract Background: Assessment of intraoperative neuromonitoring in the prevention of damage to the recurrent laryngeal nerve during total thyroidectomy.Material and methods: A group of 367 patients qualified for the study, including 312 women (85.01%) and 55 (14.99%) men, aged 18-79, having undergone total thyroidectomy due to a neutral nodular goiter. The patients were operated on by one surgeon. The study group consisted of 205 patients, including 173 (84.39%) women and 32 (15.61%) men, aged 19-79, who were operated on with the use of intraoperative neuromonitoring. The control group consisted of 162 patients, including 139 (85.80%) women and 23 (14.20%) men, aged 18-77 years, who had undergone surgery only with macroscopic visualization of the recurrent laryngeal nerve without the application of intraoperative neuromonitoring. Then, in the period from 2 to 10 years after the surgery, follow-up examinations were performed, which included 153 patients from the control group (74.6% [153/205]) and 122 patients from the study group (75.3% [122 / 162] Results: The frequency of vocal fold palsy did not differ significantly statistically in the study group and the control group (study group: 4.9% [10/205], control group: 4.9% [8/162]; p = 0.979). In the follow-up study, the incidence of laryngeal fold palsy did not show statistically significant differences between the study and control groups. Most of the damage to the recurrent laryngeal nerves was persistent.Conclusions: Neuromonitoring did not reduce the number of recurrent laryngeal nerve injuries in relation to the nerve visualization alone in noncapsular total thyroidectomy for benign nodular goiter, performed by the same experienced surgeon.

scholarly journals Minimally Invasive Video-Assisted Thyroidectomy and Parathyroidectomy with Intraoperative Recurrent Laryngeal Nerve Monitoring

2009 ◽  
Vol 2009 ◽  
pp. 1-4 ◽  
Author(s):  
Emad Kandil ◽  
Shafik N. Wassef ◽  
Haytham Alabbas ◽  
Paul L. Freidlander
Keyword(s):  
Minimally Invasive ◽  
Recurrent Laryngeal Nerve ◽  
The United States ◽  
Laryngeal Nerve ◽  
Consecutive Series ◽  
Nerve Monitoring ◽  
Laryngeal Nerves ◽  
Video Assisted ◽  
Visual Identification ◽  
Recurrent Laryngeal Nerves

Objective. Our goal is to study the feasibility of using intraoperative neuromonitoring (IONM) in minimally invasive video-assisted thyroidectomy and parathyroidectomy (MIVAT/P) with emphasis given to the identification of recurrent laryngeal nerve (RLN).Methods. Consecutive series of forty-seven patients with seventy-seven recurrent laryngeal nerves at risk undergoing both MIVAT/P and IONM were enrolled in this retrospective, nonrandomized analysis study. All operations were performed by the same surgeon within an academic institution setting. All patients underwent vocal cord evaluation postoperatively. Demographics and intraoperative and postoperative complications following surgery were collected.Results. Out of seventy-seven RLNs, there was one permanent unilateral RLN injury (1.29%) in a patient with advanced papillary thyroid cancer, managed by cord injection. There was another transient RLN paresis that resolved spontaneously (1.29%). There were no instances of equipment malfunction or interference.Conclusions. To our knowledge, this is the first reported MIVAT/P series from the United States of America with a standardized IONM technique. The technical feasibility of IONM seems acceptable and may serve as a meaningful adjunct to the visual identification of nerves. Neuromonitoring during MIVAT/P is effective in providing identification of laryngeal nerves and enables surgeons to feel more comfortable with MIVAT/P. Comparative series are needed for further evaluation.

scholarly journals Relationship between the Recurrent Laryngeal Nerve and the Inferior Thyroid Artery in the Togolese Subject: Surgical Anatomy Study from 227 Thyroidectomies

2019 ◽  
Vol 27 (1) ◽  
Author(s):  
Bathokedeou Amana ◽  
Winga Foma ◽  
Essobozou Pegbessou ◽  
Tchin Darré ◽  
Essohanam Boko ◽  
...  
Keyword(s):  
Recurrent Laryngeal Nerve ◽  
Intraoperative Complications ◽  
Cross Sectional Study ◽  
Surgical Anatomy ◽  
Laryngeal Nerve ◽  
Inferior Thyroid Artery ◽  
University Hospital ◽  
Cross Sectional ◽  
Recurrent Laryngeal Nerves ◽  
The Right

Introduction Identification of the recurrent laryngeal nerve during thyroid surgeries is recommended to preserve its functionl integrity. This study aims to determine the relationship between the recurrent laryngeal nerves and the inferior thyroid arteries during thyroidectomies, as well as any particularities and intraoperative complications. Materials and Methods Observational cross-sectional study of all culturally Togolese patients who underwent thyroidectomy with nerve dissection in the ENT department of Sylvanus Olympio University Hospital from 1 January 2013 to 30 June 2017, i.e. a period of 4 years 6 months. Results The sex ratio was 0.14 i.e., 7 women for 1 man and the average age of 41.82 years. Tissue nodules and multinodular goiters were the most operated lesions in 40.97% and 33.04%, respectively, with a plunging character in 17 cases. We had 306 cases of nerve dissection but the recurrent laryngeal nerve could not be found in 1 case on the right. It was globally retro-arterial (under the trunk and under the branches of the inferior thyroid artery) in 75.08% of cases with prevalence of the truncal, pre arterial situation in 16.07% and inter-arterial in 3.28% cases. The nerve was non-recurrent (type II pathway) in 1 case on the right. There was no recurrence injury. Parathyroid devascularization (5 cases) was autotransplanted. The surgeon's experience did not have a significant impact on the occurrence of intraoperative complications (p = 0.24). Conclusion This observational cross-sectional anatomical-surgical study supports the existing data on the relationships between the recurrent laryngeal nerve and the inferior thyroid artery by confirming their variability. Nevertheless, it was marked by the predominance of the retro arterial truncal situation of the nerve unlike the literature that most often reports a situation of the nerve under the arterial branches.

scholarly journals Avoiding the Esophageal Branches of the Recurrent Laryngeal Nerve During Retractor Placement: Precluding Postoperative Dysphagia During Anterior Approaches to the Cervical Spine

2019 ◽  
Vol 9 (4) ◽  
pp. 383-387 ◽  
Author(s):  
Christian Fisahn ◽  
Emre Yilmaz ◽  
Joe Iwanaga ◽  
Cameron Schmidt ◽  
Eric Benca ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Recurrent Laryngeal Nerve ◽  
Cadaver Study ◽  
Laryngeal Nerve ◽  
Postoperative Dysphagia ◽  
Laryngeal Nerves ◽  
Swallowing Dysfunction ◽  
Fresh Frozen ◽  
Prior Surgery ◽  
Recurrent Laryngeal Nerves

Study Design: Anatomical cadaver study. Objectives: Postoperative dysphagia is a significant complication following anterior approaches to the cervical spine and the etiology of this complication is poorly understood. Herein, we studied the esophageal branches of the recurrent laryngeal nerves to improve understanding of their anatomy and potential involvement in dysphagia. Methods: Ten fresh frozen cadaveric human specimens were dissected (20 sides). All specimens were adults with no evidence of prior surgery of the anterior neck. The recurrent laryngeal nerves were identified under a surgical microscope and observations and measurements of their esophageal branches made. Results: For each recurrent laryngeal nerve, 5-7 (mean 6.2) esophageal branches were identified. These branches ranged from 0.8 to 2.1 cm (mean 1.5 cm) in length and 0.5 to 2 mm (mean 1 mm) in diameter. They arose from the recurrent laryngeal nerves between vertebral levels T1 and C6. They all traveled to the anterior aspect of the esophagus. No statistical differences were seen between left and right sides or between sexes. Conclusion: The esophageal branches of the recurrent laryngeal nerve have been poorly described and could contribute to complications such as swallowing dysfunction following anterior cervical discectomy and fusion procedures. Therefore, a better understanding of their anatomy is important for spine surgeons. Our study revealed that these branches are always present on both sides and the anterior surface of the esophagus should be avoided while retracting it in order to minimize the risk of postoperative dysphagia.

Glottic Closure during Swallowing in the Recurrent Laryngeal Nerve-Paralyzed Cat

1989 ◽  
Vol 100 (3) ◽  
pp. 187-194 ◽  
Author(s):  
Takemoto Shin ◽  
Toshiro Umezaki ◽  
Tadatsugu Maeyama ◽  
Ikuro Morikawa
Keyword(s):  
Recurrent Laryngeal Nerve ◽  
Nerve Stimulation ◽  
Pressure Transducer ◽  
Peak Pressure ◽  
Superior Laryngeal Nerve ◽  
Laryngeal Nerve ◽  
Glottic Closure ◽  
Laryngeal Nerves ◽  
Recurrent Laryngeal Nerves ◽  
Closing Pressure

Glottic closing pressure and time were quantitatively analyzed during deglutition and in reflex glottic closure elicited by superior laryngeal nerve stimulation by means of a catheter pressure transducer in the cat. Duration and peak pressure of glottic closure during deglutition were 322.6 ± 32.2 msec (mean ± SE) and 57.5 ± 6.0 mmHg, respectively, whereas peak pressure of the reflex glottic closure was 21.7 ± 6.1 mmHg in control animals. When the recurrent laryngeal nerve was denervated unilaterally, decrease in peak glottic closing pressure on swallowing was only about 36%, whereas the peak pressure of reflex glottic closure was markedly diminished to 4.5 ± 4.6%. When bilateral recurrent laryngeal nerves denervated, decrease in peak pressure during deglutition showed no greater significance than It did after unilateral denervation. Inferior constrictors myotomy in addition to bilateral recurrent laryngeal nerve denervation reduced peak pressure to nearly zero. These results indicate that on swallowing, the inferior constrictors cooperate with the intrinsic laryngeal adductors, thus playing a very important role in reinforcing glottic closure, a function that is unlikely during reflex glottic closure.

scholarly journals NEUROMONITORING THE BRANCHES OF THE RECURRENT NERVE DURING THYROIDECTOMY

2016 ◽  
Vol 3 (2) ◽  
pp. 72-75
Author(s):  
Silvia Cârstea ◽  
Adriana Elena Nica ◽  
R. Popescu
Keyword(s):  
Recurrent Laryngeal Nerve ◽  
Thyroid Surgery ◽  
False Negative ◽  
Laryngeal Nerve ◽  
Recurrent Nerve ◽  
Accidental Injury ◽  
Laryngeal Nerves ◽  
Emg Signal ◽  
Recurrent Laryngeal Nerves ◽  
Laryngeal Recurrent Nerve

The lesions of the laryngeal nerves are the most severe long term complications after thyroidectomy. Visual identification of the recurrent laryngeal nerve during thyroid surgery has been recommended in many studies as the golden standard of RLN treatment. The non recurrent laryngeal nerve should always be taken into consideration in order to avoid accidental injury during thyroid surgery. Laryngeal recurrent nerve can be difficult to identify because of rare anatomical variants, extra laryngeal branches, or in complicated thyroid operations, such as voluminous goiter or thyroid cancer. Intraoperative nerve monitoring is secure for the patient, easy to use and useful in showing the integrity of laryngeal recurrent nerve, both during and after surgery. The Departament of Surgery, Valcea Country Hospital, from January 2014 to April 2015, developed a prospective study which enrolled 123 patients who underwent thyroid interventions with neuromonitoring and all had been treated by the same surgeon. The signal obtained from RLN localization, 215 nerves (96%), from a total of 222 , show a clear and reliable EMG response. 7 nerves (3%) were not received through EMG signal. In 3 cases involving 5 RLN there was a false negative result caused by electrode malposition and in 2 cases the RLN was injured during surgery.Clinical evolution of the procedure and more extended studies are needed to show if intraoperative monitoring decreases the rate of recurrent laryngeal nerves iatrogenic injury.

Non-recurrent laryngeal nerve related to thyroid surgery: report of three cases

2007 ◽  
Vol 122 (7) ◽  
pp. 757-761 ◽  
Author(s):  
C Page ◽  
P Monet ◽  
J Peltier ◽  
B Bonnaire ◽  
V Strunski
Keyword(s):  
Recurrent Laryngeal Nerve ◽  
Subclavian Artery ◽  
Thyroid Surgery ◽  
Anatomical Variation ◽  
Anatomical Variations ◽  
Laryngeal Nerve ◽  
Frequency Of Occurrence ◽  
Laryngeal Nerves ◽  
Recurrent Laryngeal Nerves ◽  
The Right

AbstractPurpose of the study:We aimed to highlight a rare anatomical variation involving the recurrent laryngeal nerve, and to emphasise its implications for thyroid surgery.Materials and methods:Over a period of 13 years, 993 patients underwent thyroid surgery; 1557 recurrent laryngeal nerves (887 on the right side) were exposed.Results:Three non-recurrent laryngeal nerves were found on the right side, associated with a retro-oesophageal subclavian artery. One case was suspected before surgery.Discussion:Several variations in the path and branches of the recurrent laryngeal nerve have been reported in the literature. The frequency of occurrence of a non-recurrent laryngeal nerve is about 1 per cent, for patients undergoing thyroid surgery. Other surgically relevant anatomical variations of the recurrent laryngeal nerve include associations with the inferior thyroid artery and the presence of nerve branches.Conclusion:The recurrent laryngeal nerve must be carefully dissected and totally exposed during thyroid surgery in order to best preserve its function. Moreover, the thyroid surgeon must be aware of the existence of anatomical variations, which are not as rare as one may think.

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