1
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Melfa G, Siragusa G, Cocorullo G, Guzzino M, Raspanti C, Albanese L, Mazzola S, Richiusa P, Orlando G, Scerrino G. Effects of Intraoperative Nerve Monitoring Techniques on Voice and Swallowing Disorders after Uncomplicated Thyroidectomy: Preliminary Report of a Bi-Institutional Prospective Study. J Clin Med 2022; 12:jcm12010305. [PMID: 36615105 PMCID: PMC9821617 DOI: 10.3390/jcm12010305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/12/2022] [Accepted: 12/28/2022] [Indexed: 01/03/2023] Open
Abstract
Background: Voice and swallowing problems are frequently associated with thyroidectomy. Intermittent nerve monitoring (i-IONM) seems to provide a positive effect in reducing its prevalence. The aim of this study was to test the hypothesis that continuous intraoperative nerve monitoring (c-IONM) may reduce the prevalence of these disorders even further than i-IONM. Methods: This 3-arm prospective bi-institutional study compared 179 consecutive patients that underwent thyroidectomy: 56 without IONM, 55 with i-IONM and 67 with c-IONM. Neck dissections and laryngeal nerve palsies were excluded. Two questionnaires (VHI-10 for voice disorders and EAT-10 for swallowing disorders; both validated for Italian language use) were administered before and 1 month after surgery. Statistical significance was analyzed by the chi-squared test. Results: After thyroidectomy, no statistically significant differences were found in the three groups concerning EAT-10. although these symptoms seemed to be influenced by gastro-esophageal reflux. VHI-10 worsened in the “no-IONM” group compared with both i-IONM (p < 0.09, not quite statistically significant) and c-IONM (p < 0.04). Conclusion: Both i- and c-IONM improve voice quality independently of laryngeal nerve integrity. Reduced dissection and particularly restrained manipulation could explain these results, being particularly favorable for c-IONM.
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Affiliation(s)
- Giuseppina Melfa
- Unit of General and Emergency Surgery, Department of Surgical Oncological and Oral Sciences, Policlinico “P. Giaccone”—University of Palermo, 90127 Palermo, Italy
| | | | - Gianfranco Cocorullo
- Unit of General and Emergency Surgery, Department of Surgical Oncological and Oral Sciences, Policlinico “P. Giaccone”—University of Palermo, 90127 Palermo, Italy
| | - Marianna Guzzino
- Villa Serena Clinic—Unit of General Surgery, 90100 Palermo, Italy
| | - Cristina Raspanti
- Unit of General and Emergency Surgery, Department of Surgical Oncological and Oral Sciences, Policlinico “P. Giaccone”—University of Palermo, 90127 Palermo, Italy
| | - Leone Albanese
- Villa Serena Clinic—Unit of General Surgery, 90100 Palermo, Italy
| | - Sergio Mazzola
- Unit of Clinical Epidemiology and Tumor Registry, Department of Laboratory Diagnostics, Policlinico “P. Giaccone”—University of Palermo, 90127 Palermo, Italy
| | - Pierina Richiusa
- Section of Endocrinology—Department of Health Promotion Sciences Maternal and Infantile Care, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, Via del Vespro 129, 90127 Palermo, Italy
| | - Giuseppina Orlando
- Unit of General and Emergency Surgery, Department of Surgical Oncological and Oral Sciences, Policlinico “P. Giaccone”—University of Palermo, 90127 Palermo, Italy
- Correspondence:
| | - Gregorio Scerrino
- Unit of Endocrine Surgery, Department of Surgical Oncological and Oral Sciences, Policlinico “P. Giaccone”—University of Palermo, 90127 Palermo, Italy
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2
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Wang JJ, Huang TY, Wu CW, Lin YC, Tseng HY, Liu CH, Lu IC, Chang PY, Chen HC, Chen HY, Dionigi G, Chiang FY, Wang LF. Improving Voice Outcomes After Thyroid Surgery - Review of Safety Parameters for Using Energy-Based Devices Near the Recurrent Laryngeal Nerve. Front Endocrinol (Lausanne) 2021; 12:793431. [PMID: 34899616 PMCID: PMC8662988 DOI: 10.3389/fendo.2021.793431] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 11/08/2021] [Indexed: 11/13/2022] Open
Abstract
Technological advances in thyroid surgery have rapidly increased in recent decades. Specifically, recently developed energy-based devices (EBDs) enable simultaneous dissection and sealing tissue. EBDs have many advantages in thyroid surgery, such as reduced blood loss, lower rate of post-operative hypocalcemia, and shorter operation time. However, the rate of recurrent laryngeal nerve (RLN) injury during EBD use has shown statistically inconsistent. EBDs generate high temperature that can cause iatrogenic thermal injury to the RLN by direct or indirect thermal spread. This article reviews relevant medical literatures of conventional electrocauteries and different mechanisms of current EBDs, and compares two safety parameters: safe distance and cooling time. In general, conventional electrocautery generates higher temperature and wider thermal spread range, but when applying EBDs near the RLN adequate activation distance and cooling time are still required to avoid inadvertent thermal injury. To improve voice outcomes in the quality-of-life era, surgeons should observe safety parameters and follow the standard procedures when using EBDs near the RLN in thyroid surgery.
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Affiliation(s)
- Jia Joanna Wang
- Department of Otorhinolaryngology-Head and Neck Surgery, International Thyroid Surgery Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Municipal Siaogang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Tzu-Yen Huang
- Department of Otorhinolaryngology-Head and Neck Surgery, International Thyroid Surgery Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Che-Wei Wu
- Department of Otorhinolaryngology-Head and Neck Surgery, International Thyroid Surgery Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Center for Liquid Biopsy and Cohort Research, and Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Chu Lin
- Department of Otorhinolaryngology-Head and Neck Surgery, International Thyroid Surgery Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hsin-Yi Tseng
- Department of Otorhinolaryngology-Head and Neck Surgery, International Thyroid Surgery Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Cheng-Hsin Liu
- Department of Otorhinolaryngology-Head and Neck Surgery, International Thyroid Surgery Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Municipal Siaogang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - I-Cheng Lu
- Department of Anesthesiology, Kaohsiung Municipal Siaogang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Pi-Ying Chang
- Department of Anesthesiology, Kaohsiung Municipal Tatung Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hui-Chun Chen
- Department of Nursing, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Hsiu-Ya Chen
- Department of Anesthesiology, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Gianlorenzo Dionigi
- Division of General Surgery, Endocrine Surgery Section, Istituto Auxologico Italiano IRCCS, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Feng-Yu Chiang
- Department of Otolaryngology-Head and Neck Surgery, E-Da Hospital, Kaohsiung, Taiwan
- School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan
| | - Ling-Feng Wang
- Department of Otorhinolaryngology-Head and Neck Surgery, International Thyroid Surgery Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
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3
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Ku D, Hui M, Cheung P, Chow O, Smith M, Riffat F, Sritharan N, Kamani D, Randolph G. Meta-analysis on continuous nerve monitoring in thyroidectomies. Head Neck 2021; 43:3966-3978. [PMID: 34342380 DOI: 10.1002/hed.26828] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 06/15/2021] [Accepted: 07/22/2021] [Indexed: 11/05/2022] Open
Abstract
In the last decade, the introduction of continuous intraoperative recurrent laryngeal nerve (RLN) monitoring (C-IONM) has enabled the operator to verify the functional integrity of the vagus nerve-recurrent laryngeal nerve (VN-RLN) axis in real-time. We aim to present the current evidence on C-IONM utility for thyroid surgery by conducting the first meta-analysis on this technique. A systematic review of literature was conducted by two independent reviewers via Ovid in the Medline, EMBASE, and Cochrane reviews databases. The search was limited to human subject research in peer-reviewed articles of all languages published between Jan 1946 and April 2020. Medical subject headings (MeSH) terms utilized were thyroid surgery, thyroidectomies, recurrent laryngeal nerve, vagal nerve, monitor, and stimulation. Thirty-eight papers were identified from Ovid, another six papers were identified by hand-search. A random effect meta-analysis was performed with assessment of heterogeneity using the I2 value. A total of 23 papers that investigated the use of continuous vagal nerve monitoring during thyroid surgery were identified. The proportion of nerves at risk (NAR) with temporary RLN paralysis postoperation was 2.26% (95% CI: 1.6-2.9, I2 = 37). The proportion of NAR with permanent RLN palsy postoperation was 0.05% (95% CI: 0.08-0.2, I2 = 0). In this meta-analysis, there is one case of temporary vagal nerve paralysis secondary to VN electrode dislodgement, and a case of hemodynamic instability manifested in bradycardia and hypotension in the initial phase of surgery shortly after calibration. C-IONM is a safe and effective means by which RLN paralyses in thyroid surgery can be reduced.
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Affiliation(s)
- Dominic Ku
- Department of Otolaryngology - Head & Neck Surgery, Westmead Hospital, Sydney, New South Wales, Australia
| | - Michelle Hui
- Department of Otolaryngology - Head & Neck Surgery, Westmead Hospital, Sydney, New South Wales, Australia
| | - Phylannie Cheung
- Department of Otolaryngology - Head & Neck Surgery, Westmead Hospital, Sydney, New South Wales, Australia
| | - Oliver Chow
- Department of Otolaryngology - Head & Neck Surgery, Westmead Hospital, Sydney, New South Wales, Australia
| | - Mark Smith
- Department of Otolaryngology - Head & Neck Surgery, Westmead Hospital, Sydney, New South Wales, Australia.,Department of Otolaryngology - Head & Neck Surgery, Nepean Hospital, Sydney, New South Wales, Australia
| | - Faruque Riffat
- Department of Otolaryngology - Head & Neck Surgery, Westmead Hospital, Sydney, New South Wales, Australia.,Department of Otolaryngology - Head & Neck Surgery, Nepean Hospital, Sydney, New South Wales, Australia
| | - Niranjan Sritharan
- Department of Otolaryngology - Head & Neck Surgery, Westmead Hospital, Sydney, New South Wales, Australia.,Department of Otolaryngology - Head & Neck Surgery, Nepean Hospital, Sydney, New South Wales, Australia
| | - Dipti Kamani
- Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
| | - Gregory Randolph
- Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA.,Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
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4
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Zhang D, Wang C, Wang T, Du R, Li K, Yang M, Xue G, Dionigi G, Sun H. Clinical Experience of Use of Percutaneous Continuous Nervemonitoring in Robotic Bilateral Axillo-Breast Thyroid Surgery. Front Endocrinol (Lausanne) 2021; 12:817026. [PMID: 35211092 PMCID: PMC8862684 DOI: 10.3389/fendo.2021.817026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 12/31/2021] [Indexed: 12/05/2022] Open
Abstract
INTRODUCTION AND OBJECTIVE There is a need for a simplified technique for C-IONM in robotic surgery. The primary aim of this study was to describe our clinical experience with the use of percutaneous C-IONM in robotic bilateral axillary thyroid surgery. METHODS This study prospectively enrolled 304 consecutive patients who underwent robotic thyroidectomy via the bilateral axillo-breast approach and standardized C-IONM via percutaneous probe stimulation. RESULTS 323 RLNs were analyzed. C-IONM with percutaneous probes was feasible in all cases. During this study, we did not record any cases of probe displacement, and no additional robotic maneuvers were required. The average stimulation intensity was 2 mA. There were no adverse local or systemic C-IONM side effects. The mean time required for probe positioning was 3 minutes. The EMG amplitude signal of 48 RLNs decreased significantly, < 50% from the original V1 signal. In these cases, the surgical procedure was modified. CONCLUSION The proposed percutaneous C-IONM provides a simplification of the continuous monitoring procedure for robotics. The advantage of percutaneous C-IONM is that it does not require additional trocar space, repeated instrument changes, and unmodified cosmesis. To our knowledge, this is the first study on the application of percutaneous C-IONM in robotic thyroid surgery.
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Affiliation(s)
- Daqi Zhang
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, China
| | - Cheng Wang
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, China
| | - Tie Wang
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, China
| | - Rui Du
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, China
| | - Kunlin Li
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, China
| | - Mingyu Yang
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, China
| | - Gaofeng Xue
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, China
| | - Gianlorenzo Dionigi
- Division of General Surgery, Istituto Auxologico Italiano, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Hui Sun
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, China
- *Correspondence: Hui Sun, ; orcid.org/0000-0001-8348-4933
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5
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Wu CW, Huang TY, Randolph GW, Barczyński M, Schneider R, Chiang FY, Silver Karcioglu A, Wojtczak B, Frattini F, Gualniera P, Sun H, Weber F, Angelos P, Dralle H, Dionigi G. Informed Consent for Intraoperative Neural Monitoring in Thyroid and Parathyroid Surgery - Consensus Statement of the International Neural Monitoring Study Group. Front Endocrinol (Lausanne) 2021; 12:795281. [PMID: 34950109 PMCID: PMC8689131 DOI: 10.3389/fendo.2021.795281] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 11/08/2021] [Indexed: 11/13/2022] Open
Abstract
In the past decade, the use of intraoperative neural monitoring (IONM) in thyroid and parathyroid surgery has been widely accepted by surgeons as a useful technology for improving laryngeal nerve identification and voice outcomes, facilitating neurophysiological research, educating and training surgeons, and reducing surgical complications and malpractice litigation. Informing patients about IONM is not only good practice and helpful in promoting the efficient use of IONM resources but is indispensable for effective shared decision making between the patient and surgeon. The International Neural Monitoring Study Group (INMSG) feels complete discussion of IONM in the preoperative planning and patient consent process is important in all patients undergoing thyroid and parathyroid surgery. The purpose of this publication is to evaluate the impact of IONM on the informed consent process before thyroid and parathyroid surgery and to review the current INMSG consensus on evidence-based consent. The objective of this consensus statement, which outlines general and specific considerations as well as recommended criteria for informed consent for the use of IONM, is to assist surgeons and patients in the processes of informed consent and shared decision making before thyroid and parathyroid surgery.
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Affiliation(s)
- Che-Wei Wu
- Department of Otorhinolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Center for Liquid Biopsy and Cohort Research, and Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Tzu-Yen Huang
- Department of Otorhinolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Gregory W. Randolph
- Department of Otolaryngology, Harvard Medical School, Boston, MA, United States
| | - Marcin Barczyński
- Department of Endocrine Surgery, Third Chair of General Surgery, Jagiellonian University Medical College, Krakow, Poland
| | - Rick Schneider
- Department of Visceral, Vascular and Endocrine Surgery, University Hospital Halle, Martin-Luther-University, Halle-Wittenberg, Germany
| | - Feng-Yu Chiang
- Department of Otolaryngology, E-Da Hospital, School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan
| | | | - Beata Wojtczak
- Department of General, Minimally Invasive and Endocrine Surgery, Wroclaw Medical University, Wroclaw, Poland
| | - Francesco Frattini
- Department of Surgery, Ospedale di Circolo, ASST, Settelaghi, Varese, Italy
| | - Patrizia Gualniera
- Forensics Division, Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Messina, Italy
| | - Hui Sun
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Frank Weber
- Department of General, Visceral and Transplantation Surgery, University of Duisburg-Essen, Essen, Germany
| | - Peter Angelos
- Department of Surgery and MacLean Center for Clinical Medical Ethics, The University of Chicago, Chicago, IL, United States
| | - Henning Dralle
- Department of General, Visceral and Transplantation Surgery, University of Duisburg-Essen, Essen, Germany
| | - Gianlorenzo Dionigi
- Division of Surgery, Istituto Auxologico Italiano IRCCS, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
- *Correspondence: Gianlorenzo Dionigi,
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Sinclair CF, Téllez MJ, Peláez-Cruz R, Díaz-Baamonde A, Ulkatan S. Continuous neuromonitoring during radiofrequency ablation of benign thyroid nodules provides objective evidence of laryngeal nerve safety. Am J Surg 2020; 222:354-360. [PMID: 33384152 DOI: 10.1016/j.amjsurg.2020.12.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/15/2020] [Accepted: 12/18/2020] [Indexed: 11/18/2022]
Abstract
INTRODUCTION The recurrent laryngeal nerves(RLN) run immediately posterior to the thyroid capsule and could be injured during thyroid radiofrequency ablation(RFA). This study assesses whether RLN functional integrity is altered during RFA using continuous intraoperative neuromonitoring(CIONM). METHODS Prospective case series of twenty nodules treated with RFA under general anesthesia utilizing the laryngeal adductor reflex(LAR) for CIONM. RESULTS Thirteen nodules abutted the posterior thyroid capsule and 'danger triangle' for RLN injury. The ablative field did not breach the posterior capsule; 40 W was the maximal power used adjacent to the capsule. No patient experienced significant LAR amplitude alterations. Pre and postoperative laryngoscopy and voice assessments were comparable. At 12 months' median follow-up, no patient displayed posterior nodule regrowth. CONCLUSIONS This prospective case series supports the premise that benign nodule RFA is safe with regards to RLN functional integrity provided the posterior capsule is not breached by the ablation zone and posterior power is ≤ 40 W.
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Affiliation(s)
- Catherine F Sinclair
- Department of Otolaryngology Head and Neck Surgery, Mount Sinai West Hospital, New York, NY, USA.
| | - Maria J Téllez
- Department of Intraoperative Neurophysiology, Mount Sinai West Hospital, New York, NY, USA
| | - Roberto Peláez-Cruz
- Department of Intraoperative Neurophysiology, Mount Sinai West Hospital, New York, NY, USA
| | - Alba Díaz-Baamonde
- Department of Intraoperative Neurophysiology, Mount Sinai West Hospital, New York, NY, USA
| | - Sedat Ulkatan
- Department of Intraoperative Neurophysiology, Mount Sinai West Hospital, New York, NY, USA
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7
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Stankovic P, Wittlinger J, Georgiew R, Dominas N, Hoch S, Wilhelm T. Continuous intraoperative neuromonitoring (cIONM) in head and neck surgery-a review. HNO 2020; 68:86-92. [PMID: 32219490 PMCID: PMC7403167 DOI: 10.1007/s00106-020-00824-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Although the history of intraoperative neuromonitoring (IONM) dates back to the 19th century, the method did not evolve further than the mere differentiation of nerves until recently. Only the development of continuous IONM (cIONM) has allowed for non-stop analysis of excitation amplitude and latency during surgical procedures, which is nowadays integrated into the software of almost all commercially available neuromonitoring devices. The objective of cIONM is real-time monitoring of nerve status in order to recognize and prevent impending nerve injury and predict postoperative nerve function. Despite some drawbacks such as false-positive/negative alarms, technical artefacts, and rare adverse effects, cIONM remains a good instrument which is still under development. Active (acIONM) and passive (pcIONM) methods of cIONM are described in literature. The main fields of cIONM implementation are currently thyroid surgery (in which the vagal nerve is continuously stimulated) and surgery to the cerebellopontine angle (in which the facial nerve is either continuously stimulated or the discharge signal of the nerve is analyzed via pcIONM). In the latter surgery, continuous monitoring of the cochlear nerve is also established.
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Affiliation(s)
- P Stankovic
- Department of Otolaryngology, Head/Neck & Facial Plastic Surgery, Sana Kliniken Leipziger Land, Rudolf-Virchow-Straße 2, 04552, Borna, Germany
| | - J Wittlinger
- Department of Otolaryngology, Head and Neck Surgery, Martin Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - R Georgiew
- Department of Otolaryngology, Head/Neck & Facial Plastic Surgery, Sana Kliniken Leipziger Land, Rudolf-Virchow-Straße 2, 04552, Borna, Germany
| | - N Dominas
- Department of Otolaryngology, Philipps-University Marburg, Marburg, Germany
| | - S Hoch
- Department of Otolaryngology, Philipps-University Marburg, Marburg, Germany
| | - T Wilhelm
- Department of Otolaryngology, Head/Neck & Facial Plastic Surgery, Sana Kliniken Leipziger Land, Rudolf-Virchow-Straße 2, 04552, Borna, Germany. .,Medical Faculty, Philipps-University Marburg, Marburg, Germany.
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8
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Huang TY, Lin YC, Tseng HY, Dionigi G, Kim HY, Lu IC, Chang PY, Chiang FY, Wu CW. Safety of Ligasure exact dissector in thyroidectomy with continuous neuromonitoring: a porcine model. Gland Surg 2020; 9:702-710. [PMID: 32775260 DOI: 10.21037/gs.2020.03.17] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background The purpose of this study was to investigate and define safety parameters for using the Ligasure exact dissector (LED) for dissection close to the recurrent laryngeal nerve (RLN) during thyroidectomy. Methods Real-time electrophysiologic electromyographic (EMG) tracings were recorded in 16 RLNs (8 piglets) during various applications of LED under continuous intraoperative monitoring in this prospective porcine model study. In the activation study, LED was activated at varying distances from the RLN. In the cooling study, LED was activated with different cooling times or after touching the sternocleidomastoid muscle before application to the RLN. Results In the activation study, no adverse EMG events occurred at distances longer than 1 mm. In the cooling study, no adverse EMG events occurred after a 2-second cooling time. Additionally, no adverse EMG events occurred when a sternocleidomastoid muscle touch maneuver was used for cooling. Conclusions The LED can be safely used at distance of 1 mm or longer, and it should be cooled for at least 2 seconds or by muscle touch maneuver. Thyroid surgeons can avoid RLN injury if standard procedures for LED use are observed.
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Affiliation(s)
- Tzu-Yen Huang
- Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
| | - Yi-Chu Lin
- Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hsin-Yi Tseng
- Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Gianlorenzo Dionigi
- Division for Endocrine and Minimally Invasive Surgery, Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University Hospital G. Martino, University of Messina, Messina, Italy
| | - Hoon-Yub Kim
- Department of Surgery, KUMC Thyroid Center, Korea University Hospital, Korea University College of Medicine, Seoul, Korea
| | - I-Cheng Lu
- Faculty of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Anesthesiology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Pi-Ying Chang
- Department of Anesthesiology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Feng-Yu Chiang
- School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan.,Department of Otolaryngology, E-Da Hospital, Kaohsiung, Taiwan
| | - Che-Wei Wu
- Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Faculty of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Municipal Siaogang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
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9
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[Continuous intraoperative neuromonitoring (cIONM) in head and neck surgery-a review. German version]. HNO 2020; 68:801-809. [PMID: 32157335 PMCID: PMC7591407 DOI: 10.1007/s00106-020-00823-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Obwohl die Geschichte des intraoperativen Neuromonitorings (IONM) bereits in das 19. Jahrhundert zurückdatiert werden kann, hat sich diese Methode bis vor Kurzem nicht von der reinen Differenzierung des Nervs weiterentwickelt. Erst das kontinuierliche IONM (cIONM) ermöglichte die durchgehende Analyse der Reizamplituden und -latenzen, welche mittlerweile ebenfalls in die Software gängiger Monitoringsysteme integriert wurde. Zielsetzung des cIONM ist ein Real-Time-Monitoring des Nervenstatus während des Eingriffs, um so drohende Nervenverletzung erkennen und verhindern zu können und die postoperative Funktion des Nervs vorhersehbar zu erhalten. Trotz einiger Nachteile wie falsch-positiver oder -negativer Alarme, technischer Artefakte und seltener Nebenwirkungen bleibt das cIONM ein gutes Hilfsmittel, das noch weiterentwickelt wird. In der Literatur sind sowohl aktive (acIONM) als auch passive (pcIONM) Reiz- und Ableitmethoden des cIONM beschrieben. Derzeit gängige Anwendungsgebiete des cIONM umfassen die Schilddrüsenchirurgie mit der kontinuierlichen Stimulation des N. vagus sowie die Chirurgie des Kleinhirnbrückenwinkels (KHBW) mit dem Monitoring des N. facialis; hierbei werden neben kontinuierlicher Stimulation auch die Entladungsmuster des Nervs analysiert. Des Weiteren ist in die Chirurgie des KHBW das kontinuierliche Monitoring des Hörnervs etabliert.
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Zhang D, Wang T, Zhao Y, Sun H, Pino A, Kim HY, Dionigi G. Pre-Prototype Stimulating and Recording Endotracheal Tube for Continuous Monitoring of the Recurrent Laryngeal Nerve During Thyroid Surgery. J INVEST SURG 2020; 34:1033-1043. [PMID: 32151187 DOI: 10.1080/08941939.2020.1734693] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Continuous intraoperative neural monitoring (C-IONM) is a promising technology used to decrease recurrent laryngeal nerve (RLN) damage during thyroid surgery. However, C-IONM use is limited due to its challenging application. C-IONM requires dissection of the carotid sheath and placement of an electrode around the vagus nerve (VN). In our study, we simultaneously stimulated and monitored the proximal RLN trans-tracheally using surface electrodes that were positioned solely on the endotracheal tube. METHODS We described the design, implementation, and testing of a pre-prototype, combined stimulating and recording endotracheal tube (SRET) that continually delivered current from tube edge, and tested the function of the RLN at the vocal cords (VC). The SRET was tested in vivo on 10 RLNs using 5 pigs as animal models. RESULTS The SRET was capable of the following, delivery of continuous trans-tracheal stimulation to the proximal RLN, continuous trans-tracheal stimulation-induced VC movement, and standard ipsilateral RLN biphasic waveforms with latency and amplitude; and recording evoked responses were recorded in the ipsilateral RLN. CONCLUSION The pre-prototype SRET represents a possible advancement in technology because it simplified the C-IONM. Thus, the SRET provides a minimally invasive, alternative application to the C-IONM vagal nerve cuff electrodes.
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Affiliation(s)
- Daqi Zhang
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun city, Jilin Province, China
| | - Tie Wang
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun city, Jilin Province, China
| | - Yishen Zhao
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun city, Jilin Province, China
| | - Hui Sun
- Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun city, Jilin Province, China
| | - Antonella Pino
- Division for Endocrine and Minimally Invasive Surgery, Department of Human Pathology in Adulthood and Childhood ''G. Barresi'', University Hospital G. Martino, University of Messina, Messina, Italy
| | - Hoon Yub Kim
- Department of Surgery, Division of Breast and Endocrine Surgery, Minimally Invasive Surgery and Robotic Surgery Center, KUMC Thyroid Center Korea University, Anam Hospital, Seoul, Republic of Korea
| | - Gianlorenzo Dionigi
- Division for Endocrine and Minimally Invasive Surgery, Department of Human Pathology in Adulthood and Childhood ''G. Barresi'', University Hospital G. Martino, University of Messina, Messina, Italy
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Onoda N, Noda S, Tauchi Y, Asano Y, Kusunoki Y, Ishihara S, Morisaki T, Kashiwagi S, Takashima T, Ohira M. Continuous intraoperative neuromonitoring for thyroid cancer surgery: A prospective study. Laryngoscope Investig Otolaryngol 2019; 4:455-459. [PMID: 31453357 PMCID: PMC6703108 DOI: 10.1002/lio2.290] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 06/18/2019] [Accepted: 06/24/2019] [Indexed: 01/02/2023] Open
Abstract
Objective We evaluated the utility of continuous intraoperative neuromonitoring (CIONM) during surgery for thyroid cancer (TC) in an educational university hospital. Study Design Prospective observational study. Methods During the period April 2016 to March 2017, 43 patients who underwent standardized surgery with CIONM were prospectively included: 5 men and 38 women, 24–87 years old (median 52 years); 23 lobectomies and 20 total thyroidectomies with node dissection were conducted. Thirty‐six operations were performed by a supervising surgeon, and seven were performed by trainees. Results Temporal vocal cord paresis (VCP) was identified in 9 of 63 nerves at risk (14.3%) by postoperative laryngoscopy. VCP was not related to clinical factors including the surgeon's experience or the severe nerve stress demonstrated by CIONM. A significant relation only between VCP and loss of signal (LOS) was demonstrated (P = .002). The recovery of VCP was rapid (<1 month) in patients with global injury even when LOS was demonstrated, but was prolonged in patients demonstrating obvious segmental nerve injury and LOS. Conclusion The present standard protocol of CIONM was useful to some extent to protect prolonged VCP, but not enough to detect every nerve stress causing VCP during TC surgery. On the other hand, CIONM is a promising method that could contribute surgical education at training hospitals enabling the instant confirmation of the procedure safely. Levels of Evidence 3b
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Affiliation(s)
- Naoyoshi Onoda
- Department of Breast and Endocrine Surgery Osaka City University Graduate School of Medicine Osaka Japan
| | - Satoru Noda
- Department of Breast and Endocrine Surgery Osaka City University Graduate School of Medicine Osaka Japan
| | - Yukie Tauchi
- Department of Breast and Endocrine Surgery Osaka City University Graduate School of Medicine Osaka Japan
| | - Yuka Asano
- Department of Breast and Endocrine Surgery Osaka City University Graduate School of Medicine Osaka Japan
| | - Yukina Kusunoki
- Department of Breast and Endocrine Surgery Osaka City University Graduate School of Medicine Osaka Japan
| | - Sae Ishihara
- Department of Breast and Endocrine Surgery Osaka City University Graduate School of Medicine Osaka Japan
| | - Tamami Morisaki
- Department of Breast and Endocrine Surgery Osaka City University Graduate School of Medicine Osaka Japan
| | - Shinichiro Kashiwagi
- Department of Breast and Endocrine Surgery Osaka City University Graduate School of Medicine Osaka Japan
| | - Tsutomu Takashima
- Department of Breast and Endocrine Surgery Osaka City University Graduate School of Medicine Osaka Japan
| | - Masaichi Ohira
- Department of Breast and Endocrine Surgery Osaka City University Graduate School of Medicine Osaka Japan
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Schneider R, Machens A, Randolph G, Kamani D, Lorenz K, Dralle H. Impact of continuous intraoperative vagus stimulation on intraoperative decision making in favor of or against bilateral surgery in benign goiter. Best Pract Res Clin Endocrinol Metab 2019; 33:101285. [PMID: 31221571 DOI: 10.1016/j.beem.2019.06.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The advent of continuous vagus stimulation (CVS), eliminating lag time between nerve preparation with potential trauma and stimulation, has transformed the intraoperative surgical strategy in thyroid surgery. Continuous intraoperative nerve monitoring empowers the surgeon to be optimally aware of traction-related injury to the recurrent laryngeal nerve (RLN). Electromyographic precursor lesions, called combined events, prompt surgeons to cease harmful surgical maneuvers and release the nerve before damage to the nerve is established. Complete RLN recovery, defined as restitution of the nerve amplitude to ≥50% of baseline, assures the surgeon that it is safe to pursue completion surgery of the contralateral side in one procedure. If this restitution is incomplete or absent (<50% of amplitude baseline) immediate vocal cord paralysis is likely and it is advisable to delay completion surgery until the nerve has fully recovered. This review summarizes the tremendous progress made in this dynamic field, delineating the extent to which CVS has changed the landscape: tailoring intraoperative decision making to determine the safest course of action for patients with benign goiter.
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Affiliation(s)
- Rick Schneider
- Department of Visceral, Vascular and Endocrine Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.
| | - Andreas Machens
- Department of Visceral, Vascular and Endocrine Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Gregory Randolph
- Division of Thyroid and Parathyroid Endocrine Surgery, Department of Otolaryngology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA; Division of Surgical Oncology, Endocrine Surgery Service, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Dipti Kamani
- Division of Thyroid and Parathyroid Endocrine Surgery, Department of Otolaryngology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Kerstin Lorenz
- Department of Visceral, Vascular and Endocrine Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Henning Dralle
- Department of General, Visceral and Transplantation Surgery, Section of Endocrine Surgery, University of Duisburg-Essen, Essen, Germany
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Schneider R, Randolph GW, Dionigi G, Wu CW, Barczynski M, Chiang FY, Al-Quaryshi Z, Angelos P, Brauckhoff K, Cernea CR, Chaplin J, Cheetham J, Davies L, Goretzki PE, Hartl D, Kamani D, Kandil E, Kyriazidis N, Liddy W, Orloff L, Scharpf J, Serpell J, Shin JJ, Sinclair CF, Singer MC, Snyder SK, Tolley NS, Van Slycke S, Volpi E, Witterick I, Wong RJ, Woodson G, Zafereo M, Dralle H. International neural monitoring study group guideline 2018 part I: Staging bilateral thyroid surgery with monitoring loss of signal. Laryngoscope 2018; 128 Suppl 3:S1-S17. [DOI: 10.1002/lary.27359] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Rick Schneider
- Martin Luther University Halle-Wittenberg; Department of General, Visceral, and Vascular Surgery; Halle Germany
| | - Gregory W. Randolph
- Division of Thyroid and Parathyroid Surgery, Department of Otolaryngology; Massachusetts Eye and Ear Harvard Medical School; Boston Massachusetts
- Division of Surgical Oncology, Endocrine Surgery Service, Department of Surgery; Massachusetts General Hospital, Harvard Medical School; Boston Massachusetts
| | - Gianlorenzo Dionigi
- Division for Endocrine Surgery, at the Department of Human Pathology in Adulthood and Childhood “G. Barresi,” University Hospital G. Martino; University of Messina; Italy
| | - Che-Wei Wu
- Kaohsiung Medical University Hospital, Kaohsiung Medical University; Otolaryngology-Head and Neck Surgery; Kaohsiung Taiwan
| | - Marcin Barczynski
- Jagiellonian University, Department of Endocrine Surgery, Third Chair of General Surgery; Krakow Poland
| | - Feng-Yu Chiang
- Kaohsiung Medical University Hospital, Kaohsiung Medical University; Otolaryngology-Head and Neck Surgery; Kaohsiung Taiwan
| | - Zaid Al-Quaryshi
- University of Iowa Hospitals and Clinics, Otolaryngology; Iowa City Iowa
| | - Peter Angelos
- University of Chicago; Division of Endocrine Surgery, Department of Surgery; Chicago Illinois
| | - Katrin Brauckhoff
- Haukeland Universitetssjukehus; Department of Breast and Endocrine Surgery; Bergen Norway
| | - Claudio R. Cernea
- University of Sao Paulo Medical School; Department of Head and Neck Surgery; Sao Paulo SP Brazil
| | | | - Jonathan Cheetham
- Cornell University, Clinical Sciences, College of Veterinary Medicine; Ithaca New York
| | - Louise Davies
- VA Outcomes Group at the Veterans Affairs Medical Center; Norwich Vermont
| | - Peter E. Goretzki
- Stadtische Kliniken Neuss Lukaskrankenhaus GmbH; Neuss Nordrhein-Westfalen Germany
| | - Dana Hartl
- Institut Gustave Roussy, Otolaryngology Head & Neck Surgery; Villejuif France
| | - Dipti Kamani
- Division of Thyroid and Parathyroid Surgery, Department of Otolaryngology; Massachusetts Eye and Ear Harvard Medical School; Boston Massachusetts
| | - Emad Kandil
- Department of Surgery; Tulane University School of Medicine; New Orleans Louisiana
| | - Natalia Kyriazidis
- State University of New York Upstate Medical University; Otolaryngology; Syracuse New York
| | - Whitney Liddy
- Northwestern University Feinberg School of Medicine Department of Psychiatry and Behavioral Sciences, Otolaryngology; Chicago Illinois
| | - Lisa Orloff
- Stanford University School of Medicine, Otolaryngology, Division of Head and Neck Surgery; Stanford California
| | | | - Jonathan Serpell
- Alfred Hospital; Melbourne Victoria Australia
- Monash University School of Languages Literatures Cultures and Linguistics; Clayton Victoria Australia
| | | | | | - Michael C. Singer
- Henry Ford Hospital, Otolaryngology-Head & Neck Surgery; Detroit Michigan
| | - Samuel K. Snyder
- University of Texas Rio Grande Valley School of Medicine; Department of General Surgery; Edinburg Texas
| | - Neil S. Tolley
- St. Mary's Hospital, Imperial College Hospitals NHS Trust, St. Mary's Hospital; London United Kingdom
| | | | - Erivelto Volpi
- Hospital das Clinicas-University of Sao Paulo Medical School; Sao Paulo Brazil
| | - Ian Witterick
- Mount Sinai Hospital; Department of Otolaryngology; Toronto Ontario Canada
| | - Richard J. Wong
- Memorial Sloan-Kettering Cancer Center, Department of Surgery, Head and Neck Service; New York New York
| | | | - Mark Zafereo
- MD Anderson Cancer Center, Head and Neck Surgery; Houston Texas U.S.A
| | - Henning Dralle
- Allgemeinchirurgie, Uniklinik Halle; Halle/Saale Germany
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Sinclair CF, Téllez MJ, Ulkatan S. Noninvasive, tube-based, continuous vagal nerve monitoring using the laryngeal adductor reflex: Feasibility study of 134 nerves at risk. Head Neck 2018; 40:2498-2506. [PMID: 30120890 DOI: 10.1002/hed.25377] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 05/27/2018] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Continuous vagal intraoperative neuromonitoring (IONM) currently requires placement of a vagal nerve electrode. Herein, we present data from 100 patients (134 nerves-at-risk) monitored continuously during neck endocrine surgeries using a noninvasive, new methodology that solely utilizes endotracheal tube electrodes to simultaneously stimulate laryngeal mucosa and record a laryngeal adductor reflex continuous IONM (LAR-C-IONM) response. METHODS The laryngeal adductor reflex (LAR) was elicited by electrical laryngeal mucosal stimulation on the side contralateral to the operative field using endotracheal tube electrodes. All patients completed preoperative and postoperative laryngeal and voice examinations. RESULTS One hundred patients (134 nerves-at-risk) were included. Significantly more nerves-at-risk with an LAR opening to closing amplitude decrement >60% or with absolute closing amplitude <100 μV had postoperative vocal fold paralysis (P < .001). The LAR-C-IONM was highly sensitive to recurrent laryngeal nerve (RLN) stretch or compression. CONCLUSION The LAR-C-IONM is a promising new way to perform continuous vagal monitoring that requires no equipment other than an electromyography (EMG) endotracheal tube and is undergoing further, large-scale evaluation.
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Affiliation(s)
- Catherine F Sinclair
- Department of Otolaryngology - Head and Neck Surgery, Mount Sinai West Hospital, New York, New York
| | - Maria J Téllez
- Department of Intraoperative Neurophysiology, Mount Sinai West Hospital, New York, New York
| | - Sedat Ulkatan
- Department of Intraoperative Neurophysiology, Mount Sinai West Hospital, New York, New York
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Kandil E, Mohsin K, Murcy MA, Randolph GW. Continuous vagal monitoring value in prevention of vocal cord paralysis following thyroid surgery. Laryngoscope 2018; 128:2429-2432. [PMID: 29481696 DOI: 10.1002/lary.27144] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 01/24/2018] [Accepted: 01/26/2018] [Indexed: 12/26/2022]
Abstract
OBJECTIVES/HYPOTHESIS Continuous intraoperative neuromonitoring (CIONM) of the vagus nerve was proposed to obtained frequent repetitive electromyography (EMG) data to recognize early change in intraoperative function of the recurrent laryngeal nerve. We examine our initial experience using this technology. STUDY DESIGN Retrospective review. METHODS Data for all patients who underwent neck surgery by a single surgeon at a North American institution over a 5-year period were reviewed. CIONM was used in cases with possible higher risk of traction injury and according to surgeon preference. In these cases, stretch injury was established by warning alarm with threshold of ≥50% reduction in amplitude and/or ≥ 10% increase in latency. Preoperative and postoperative direct laryngoscopy was performed for all patients. RESULTS A total of 879 endocrine neck surgeries were performed. CIONM was used to monitor 455 recurrent laryngeal nerves (RLNs) in 344 (39.1%) surgeries. An automatic periodic stimulation (APS) alarm detected impending nerve injury in 33 (9.6%) cases by 64.9% ± 12.7% decrease in amplitude and by 27.3% increase in latency in one case. A total loss of signal (LOS) was detected in 15 (4.36%) cases. The immediate release of causative retraction successfully preserved the nerves in all cases with impending injury; however, there was no improvement in the LOS cases. Other than the cases with LOS, postoperative laryngoscopy showed normal vocal cord function in all cases. CONCLUSIONS APS technology is safe, feasible, and helpful in approximately 10% of cases in our series, which developed nascent neurapraxia adverse EMG changes associated with intraoperative RLN stretch that could be reversed intraoperatively. LEVEL OF EVIDENCE 4. Laryngoscope, 128:2429-2432, 2018.
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Affiliation(s)
- Emad Kandil
- Division of Endocrine and Oncological Surgery, Department of Surgery, Tulane University School of Medicine, New Orleans, Louisiana
| | - Khuzema Mohsin
- Division of Endocrine and Oncological Surgery, Department of Surgery, Tulane University School of Medicine, New Orleans, Louisiana
| | - Mohammad A Murcy
- Division of Endocrine and Oncological Surgery, Department of Surgery, Tulane University School of Medicine, New Orleans, Louisiana
| | - Gregory W Randolph
- Division of Thyroid and Parathyroid Surgery, Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, U.S.A
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Fundakowski CE, Hales NW, Agrawal N, Barczyński M, Camacho PM, Hartl DM, Kandil E, Liddy WE, McKenzie TJ, Morris JC, Ridge JA, Schneider R, Serpell J, Sinclair CF, Snyder SK, Terris DJ, Tuttle RM, Wu CW, Wong RJ, Zafereo M, Randolph GW. Surgical management of the recurrent laryngeal nerve in thyroidectomy: American Head and Neck Society Consensus Statement. Head Neck 2018; 40:663-675. [PMID: 29461666 DOI: 10.1002/hed.24928] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Accepted: 07/20/2017] [Indexed: 01/25/2023] Open
Abstract
"I have noticed in operations of this kind, which I have seen performed by others upon the living, and in a number of excisions, which I have myself performed on the dead body, that most of the difficulty in the separation of the tumor has occurred in the region of these ligaments…. This difficulty, I believe, to be a very frequent source of that accident, which so commonly occurs in removal of goiter, I mean division of the recurrent laryngeal nerve." Sir James Berry (1887).
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Affiliation(s)
- Christopher E Fundakowski
- Department of Otolaryngology, Temple University, Philadelphia, Pennsylvania.,Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Nathan W Hales
- Department of Otolaryngology, Uniformed Services of the Health Sciences, San Antonio, Texas.,San Antonio Head and Neck, San Antonio, Texas
| | - Nishant Agrawal
- Department of Surgery, University of Chicago, Chicago, Illinois
| | - Marcin Barczyński
- Department of Endocrine Surgery, Jagiellonian University, Kraków, Poland
| | | | - Dana M Hartl
- Department of Head and Neck Oncology - Institut de Cancérologie Gustave Roussy, Villejuif, France
| | - Emad Kandil
- Department of Surgery, Tulane University, New Orleans, Louisiana
| | - Whitney E Liddy
- Department of Otolaryngology, Northwestern University, Chicago, Illinois
| | | | - John C Morris
- Department of Endocrinology, Mayo Clinic, Rochester, Minnesota
| | - John A Ridge
- Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Rick Schneider
- Department of General, Visceral, and Vascular Surgery, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Jonathan Serpell
- Department of Surgery, Monash University, The Alfred Hospital, Prahran, Victoria, Australia
| | - Catherine F Sinclair
- Department of Ear, Nose, and Throat - Head and Neck Surgery, Mount Sinai Health System, New York, New York
| | | | - David J Terris
- Department of Otolaryngology, Augusta University, Augusta, Georgia
| | - R Michael Tuttle
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Che-Wei Wu
- Department of Otolaryngology - Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Richard J Wong
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Mark Zafereo
- Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Gregory W Randolph
- Division of Thyroid and Parathyroid Surgery, Department of Otolaryngology Massachusetts Eye and Ear Infirmary, Boston, Massachusetts
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Dhillon VK, Tufano RP. The pros and cons to real-time nerve monitoring during recurrent laryngeal nerve dissection: an analysis of the data from a series of thyroidectomy patients. Gland Surg 2018; 6:608-610. [PMID: 29302475 DOI: 10.21037/gs.2017.08.03] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Vaninder K Dhillon
- Division of Endocrine Head and Neck Surgery, Department of Otolaryngology, Johns Hopkins University, Baltimore, MD, USA
| | - Ralph P Tufano
- Division of Endocrine Head and Neck Surgery, Department of Otolaryngology, Johns Hopkins University, Baltimore, MD, USA
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Continuous monitoring of the recurrent laryngeal nerve. Langenbecks Arch Surg 2017; 403:333-339. [DOI: 10.1007/s00423-017-1631-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 10/06/2017] [Indexed: 11/25/2022]
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Schneider R, Machens A, Randolph GW, Kamani D, Lorenz K, Dralle H. Opportunities and challenges of intermittent and continuous intraoperative neural monitoring in thyroid surgery. Gland Surg 2017; 6:537-545. [PMID: 29142846 DOI: 10.21037/gs.2017.06.08] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
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. This is where continuous IONM (CIONM) comes into play: this technology enables the surgeon to (I) identify impending nerve injury as it unfolds; (II) release distressed nerves by reversing causative surgical maneuvers; and (III) verify functional nerve recovery after intraoperative loss of the electromyographic signal. Despite this superiority, CIONM is not devoid of methodological limitations, which need to be accounted for. This review summarizes the current key achievements of IONM; outlines opportunities for improvement regarding clinical implementation; and suggests areas of future research in this rapidly evolving field.
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Affiliation(s)
- Rick Schneider
- Department of Visceral, Vascular and Endocrine Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Andreas Machens
- Department of Visceral, Vascular and Endocrine Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Gregory W Randolph
- Division of Thyroid and Parathyroid Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Dipti Kamani
- Division of Thyroid and Parathyroid Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Kerstin Lorenz
- Department of Visceral, Vascular and Endocrine Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Henning Dralle
- Department of General, Visceral and Transplantation Surgery, Section of Endocrine Surgery, University of Duisburg-Essen, Essen, Germany
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Brauckhoff K, Svendsen ØS, Stangeland L, Biermann M, Aas T, Husby PJA. Injury mechanisms and electromyographic changes after injury of the recurrent laryngeal nerve: Experiments in a porcine model. Head Neck 2017; 40:274-282. [DOI: 10.1002/hed.24940] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 05/19/2017] [Accepted: 07/28/2017] [Indexed: 11/12/2022] Open
Affiliation(s)
- Katrin Brauckhoff
- Department of Breast and Endocrine Surgery; Haukeland University Hospital; Bergen Norway
| | - Øyvind S. Svendsen
- Department of Anesthesia and Intensive Care; Haukeland University Hospital; Bergen Norway
| | - Lodve Stangeland
- Department of Clinical Science; University of Bergen; Bergen Norway
| | - Martin Biermann
- Department of Radiology; Haukeland University Hospital; Bergen Norway
- Department of Clinical Medicine; University of Bergen; Bergen Norway
| | - Turid Aas
- Department of Breast and Endocrine Surgery; Haukeland University Hospital; Bergen Norway
| | - Paul J. A. Husby
- Department of Anesthesia and Intensive Care; Haukeland University Hospital; Bergen Norway
- Department of Clinical Medicine; University of Bergen; Bergen Norway
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Schneider R, Randolph GW, Barczynski M, Dionigi G, Wu CW, Chiang FY, Machens A, Kamani D, Dralle H. Continuous intraoperative neural monitoring of the recurrent nerves in thyroid surgery: a quantum leap in technology. Gland Surg 2016; 5:607-616. [PMID: 28149807 PMCID: PMC5233836 DOI: 10.21037/gs.2016.11.10] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 10/18/2016] [Indexed: 12/28/2022]
Abstract
The continuous intraoperative neural monitoring (CIONM) technique is increasingly acknowledged as a useful tool to recognize impending nerve injury and to abort the related manoeuvre to prevent nerve injury during thyroid surgery. CIONM provides valuable real-time information constantly, which is really useful during complex thyroid surgeries especially in the settings of unusual anatomy. Thus, CIONM overcomes the key methodological limitation inherent in intermittent nerve monitoring (IINOM); which is allowing the nerve to be at risk in between the stimulations. The clinically important combined electromyographic (EMG) event, indicative of impending recurrent laryngeal nerve (RLN) injury, prevents the majority of traction related injuries to the anatomically intact RLN enabling modification of the causative surgical manoeuvre in 80% of cases. These EMG changes can progress to loss of EMG signal with postoperative vocal cord palsy (VCP) if corrective action is not taken. As a further extension, CIONM also helps to identify intraoperative functional nerve recovery with restitution of amplitude to ≥50% of initial baseline; this allows continuing of resection of contralateral side. CIONM facilitates for early corrective action before permanent damage to the nerve has been done. CIONM is a recent but rapidly evolving technique, constantly being refined by various studies focusing on improvement in its implementation and interpretation, as well as on the elimination of the technical snags.
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Affiliation(s)
- Rick Schneider
- Medical Faculty, Department of General, Visceral, and Vascular Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Gregory W. Randolph
- Division of Thyroid and Parathyroid Surgery Harvard Medical School, Boston, Massachusetts, USA
| | - Marcin Barczynski
- Department of Endocrine Surgery, 3 Chair of General Surgery, Jagiellonian University, Krakow, Poland
| | | | - Che-Wei Wu
- Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Medical University, Kaohsiung City, Taiwan
| | - Feng-Yu Chiang
- Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Medical University, Kaohsiung City, Taiwan
| | - Andreas Machens
- Medical Faculty, Department of General, Visceral, and Vascular Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Dipti Kamani
- Division of Thyroid and Parathyroid Surgery Harvard Medical School, Boston, Massachusetts, USA
| | - Henning Dralle
- Medical Faculty, Department of General, Visceral, and Vascular Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Department of General, Visceral and Transplantation Surgery, Section of Endocrine Surgery, University of Duisburg-Essen, Essen, Germany
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Abstract
Background Continuous vagal intraoperative neuromonitoring (CIONM) of the recurrent laryngeal nerve (RLN) may reduce the risk of RLN lesions during high-risk endocrine neck surgery such as operation for large goiter potentially requiring transsternal surgery, advanced thyroid cancer, and recurrence. Methods Fifty-five consecutive patients (41 female, median age 61 years, 87 nerves at risk) underwent high-risk endocrine neck surgery. CIONM was performed using the commercially available NIM-Response 3.0 nerve monitoring system with automatic periodic stimulation (APS) and matching endotracheal tube electrodes (Medtronic Inc.). All CIONM events (decreased amplitude/increased latency) were recorded. Results APS malfunction occurred on three sides (3 %). A total of 138 CIONM events were registered on 61 sides. Of 138, 47 (34 %) events were assessed as imminent (13 events) or potentially imminent (34 events) lesions, whereas 91 (66 %) were classified as artifacts. Loss of signal was observed in seven patients. Actions to restore the CIONM baseline were undertaken in 58/138 (42 %) events with a median 60 s required per action. Four RLN palsies (3 transient, 1 permanent) occurred: one in case of CIONM malfunction, two sudden without any significant previous CIONM event, and one without any CIONM event. The APS vagus electrode led to temporary damage to the vagus nerve in two patients. Conclusions CIONM may prevent RLN palsies by timely recognition of imminent nerve lesions. In high-risk endocrine neck surgery, CIONM may, however, be limited in its utility by system malfunction, direct harm to the vagus nerve, and particularly, inability to indicate RLN lesions ahead in time.
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Continuous intraoperative monitoring of vagus and recurrent laryngeal nerve function in patients with advanced atrioventricular block. Langenbecks Arch Surg 2016; 401:551-6. [DOI: 10.1007/s00423-016-1433-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/07/2016] [Indexed: 10/21/2022]
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Liu XL, Wu CW, Zhao YS, Wang T, Chen P, Xin JW, Li SJ, Zhang DQ, Zhang G, Fu YT, Zhao LN, Zhou L, Dionigi G, Chiang FY, Sun H. Exclusive real-time monitoring during recurrent laryngeal nerve dissection in conventional monitored thyroidectomy. Kaohsiung J Med Sci 2016; 32:135-41. [DOI: 10.1016/j.kjms.2016.02.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 02/06/2016] [Accepted: 02/16/2016] [Indexed: 10/22/2022] Open
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Kwak HY, Dionigi G, Kim D, Lee HY, Son GS, Lee JB, Bae JW, Kim HY. Thermal injury of the recurrent laryngeal nerve by THUNDERBEAT during thyroid surgery: findings from continuous intraoperative neuromonitoring in a porcine model. J Surg Res 2016; 200:177-82. [DOI: 10.1016/j.jss.2015.06.066] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 06/02/2015] [Accepted: 06/26/2015] [Indexed: 11/29/2022]
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Mangano A, Kim HY, Wu CW, Rausei S, Hui S, Xiaoli L, Chiang FY, Roukos DH, Lianos GD, Volpi E, Dionigi G. Continuous intraoperative neuromonitoring in thyroid surgery: Safety analysis of 400 consecutive electrode probe placements with standardized procedures. Head Neck 2015; 38 Suppl 1:E1568-74. [PMID: 26613871 DOI: 10.1002/hed.24280] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 07/26/2015] [Accepted: 09/09/2015] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Continuous intraoperative neuromonitoring (C-IONM) is a new technology and it is appropriate to analyze its safety. METHODS C-IONM was performed according to a standardized technique to control any adverse events and electrode positioning issues. RESULTS Four hundred vagal nerve dissections were analyzed considering vagal nerve diameter, mean time effort for C-IONM probe positioning, and electrode dislocation rate. A significant superior dislocation rate in case of: (a) when a 3 mm automatic periodic stimulating (APS) electrode size was used in a vagal nerve diameter <2 mm; (b) anterior access; and (c) vagal nerve A subtype in relation (p < .05). No related additional local or systemic morbidity was registered in this series. There was a statistically significant positive relationship between increased diameter of vagal nerve and increased electromyography (EMG) amplitude (p = .03). There was also a significant increase of amplitude between initial and final vagal nerve stimulation in uneventful cases (p = .02). CONCLUSION We analyzed the technical issues to achieve improved vagal nerve critical view of safety dissection, stimulation, and C-IONM probe placement. © 2015 Wiley Periodicals, Inc. Head Neck 38: E1568-E1574, 2016.
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Affiliation(s)
- Alberto Mangano
- First Division of Surgery, Research Center for Endocrine Surgery, Department of Surgical Sciences and Human Morphology, University of Insubria (Como-Varese), Varese, Italy
| | - Hoon Yub Kim
- Department of Surgery, Division of Breast and Endocrine Surgery, Minimally Invasive Surgery and Robotic Surgery Center, KUMC Thyroid Center Korea University, Anam Hospital Seoul, Seoul, Korea
| | - Chei-Wei Wu
- Department of Otolaryngology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung City, Taiwan
| | - Stefano Rausei
- First Division of Surgery, Research Center for Endocrine Surgery, Department of Surgical Sciences and Human Morphology, University of Insubria (Como-Varese), Varese, Italy
| | - Sun Hui
- Jilin Provincial Key Laboratory of Surgical Translational Medicine, Japan Union Hospital of Jilin University, Division of Thyroid Surgery, Changchun City, Jilin Province, China
| | - Liu Xiaoli
- Jilin Provincial Key Laboratory of Surgical Translational Medicine, Japan Union Hospital of Jilin University, Division of Thyroid Surgery, Changchun City, Jilin Province, China
| | - Feng-Yu Chiang
- Department of Otolaryngology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung City, Taiwan
| | - Dimitrios H Roukos
- Department of General Surgery Ioannina University Hospital, Centre for Biosystems and Genomic Network Medicine Ioannina University, Ioannina, Greece
| | - Georgios D Lianos
- Department of General Surgery Ioannina University Hospital, Centre for Biosystems and Genomic Network Medicine Ioannina University, Ioannina, Greece
| | - Erivelto Volpi
- Department of Head and Neck Surgery, University of São Paulo, São Paulo, Brazil
| | - Gianlorenzo Dionigi
- First Division of Surgery, Research Center for Endocrine Surgery, Department of Surgical Sciences and Human Morphology, University of Insubria (Como-Varese), Varese, Italy
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Deniwar A, Kandil E, Randolph G. Electrophysiological neural monitoring of the laryngeal nerves in thyroid surgery: review of the current literature. Gland Surg 2015; 4:368-75. [PMID: 26425449 DOI: 10.3978/j.issn.2227-684x.2015.04.04] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Recurrent laryngeal nerve (RLN) injury is one of the most common complications of thyroid surgery. RLN injury can cause vocal cord paralysis, affecting the patient's voice and the quality of life. Injury of the external branch of the superior laryngeal nerve (EBSLN) can cause cricothyroid muscle denervation affecting high vocal tones. Thus, securing the laryngeal nerves in these surgeries is of utmost importance. Visual identification of the nerves has long been the standard method for this precaution. Intraoperative neuromonitoring (IONM) has been introduced as a novel technology to improve the protection of the laryngeal nerves and reduce the rate of RLN injury. The aim of this article is to provide a brief description of the technique and review the literature to illustrate the value of IONM. IONM can provide early identification of anatomical variations and unusual nerve routes, which carry a higher risk of injury if not detected. IONM helps in prognosticating postoperative nerve function. Moreover, by detecting nerve injury intraoperatively, it aids in staging bilateral surgeries to avoid bilateral vocal cord paralysis and tracheostomy. The article will discuss the value of continuous IONM (C-IOMN) that may prevent nerve injury by detecting EMG waveform changes indicating impending nerve injury. Herein, we are also discussing anatomy of laryngeal nerves and aspects of its injury.
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Affiliation(s)
- Ahmed Deniwar
- 1 Department of Surgery, School of Medicine, Tulane University, New Orleans, USA ; 2 Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, USA
| | - Emad Kandil
- 1 Department of Surgery, School of Medicine, Tulane University, New Orleans, USA ; 2 Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, USA
| | - Gregory Randolph
- 1 Department of Surgery, School of Medicine, Tulane University, New Orleans, USA ; 2 Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, USA
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Schneider R, Sekulla C, Machens A, Lorenz K, Nguyen Thanh P, Dralle H. Postoperative vocal fold palsy in patients undergoing thyroid surgery with continuous or intermittent nerve monitoring. Br J Surg 2015; 102:1380-7. [DOI: 10.1002/bjs.9889] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 03/24/2015] [Accepted: 06/02/2015] [Indexed: 11/11/2022]
Abstract
Abstract
Background
Continuous monitoring of electromyographic (EMG) amplitudes of the vocal muscles detects impending injury of the recurrent laryngeal nerve (RLN) during thyroid operations earlier than intermittent EMG monitoring. This may alert the surgeon to stop a manoeuvre causing stretching or pressure on the RLN, with better recovery of nerve function.
Methods
Patients with intact preoperative RLN function who underwent thyroid surgery for benign disease between January 2011 and September 2014 under continuous intraoperative nerve monitoring (CIONM) or intermittent intraoperative nerve monitoring (IIONM) were included in this observational study conducted at a tertiary surgical centre. For CIONM, combined EMG events indicative of imminent nerve injury were defined as an EMG amplitude decrease of 50 per cent or more and a latency increase of 10 per cent relative to baseline values. The rates of early and permanent palsy for the two groups of patients were compared.
Results
There were 1526 patients, 788 of whom (1314 nerves at risk) underwent thyroid surgery using CIONM and 738 (965 nerves at risk) had IIONM. With the use of CIONM, 63 (82 per cent) of 77 combined events were reversible during the operation. No permanent vocal fold palsy occurred with CIONM, whereas four unilateral permanent vocal fold palsies (0·4 per cent) were diagnosed after IIONM (P = 0·019).
Conclusion
Operation with CIONM resulted in fewer permanent vocal fold palsies compared with IIONM after thyroid surgery in patients with benign disease.
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Affiliation(s)
- R Schneider
- Department of General, Visceral and Vascular Surgery, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, D-06120, Halle (Saale), Germany
| | - C Sekulla
- Department of General, Visceral and Vascular Surgery, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, D-06120, Halle (Saale), Germany
| | - A Machens
- Department of General, Visceral and Vascular Surgery, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, D-06120, Halle (Saale), Germany
| | - K Lorenz
- Department of General, Visceral and Vascular Surgery, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, D-06120, Halle (Saale), Germany
| | - P Nguyen Thanh
- Department of General, Visceral and Vascular Surgery, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, D-06120, Halle (Saale), Germany
| | - H Dralle
- Department of General, Visceral and Vascular Surgery, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, D-06120, Halle (Saale), Germany
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29
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Wu CW, Chai YJ, Dionigi G, Chiang FY, Liu X, Sun H, Randolph GW, Tufano RP, Kim HY. Recurrent laryngeal nerve safety parameters of the Harmonic Focus during thyroid surgery: Porcine model using continuous monitoring. Laryngoscope 2015. [PMID: 26198968 DOI: 10.1002/lary.25412] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVES/HYPOTHESIS The Harmonic Focus (HF) is one of the most popular energy-based devices. The aim of this study was to provide recurrent laryngeal nerve (RLN) functional data that define the safety parameters of the HF during thyroidectomy. STUDY DESIGN Prospective porcine model using continuous electrophysiologic monitoring. METHODS Ten piglets were used. At varying distances from the RLN, the HF was activated (activation study). The HF was also applied directly on the RLN after activation on sternocleidomastoid muscle for 10 seconds with different cooling times (cooling study). RESULTS In the activation study, there was no adverse electromyography (EMG) event at more than 1 mm distance. In the cooling study, there was no adverse EMG event after a 10-second cooling period. When the HF was cooled on the sternocleidomastoid muscle, there was no adverse EMG event after 2 seconds cooling time. CONCLUSIONS The safe distance of the HF was 1 mm, and it should be cooled for more than 10 seconds or 2 seconds after cooling on muscle. The HF should be used in a standardized manner to avoid RLN injury. LEVEL OF EVIDENCE NA.
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Affiliation(s)
- Che-Wei Wu
- Department of Otorhinolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University.,Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Young Jun Chai
- Department of Surgery, Seoul National University Boramae Medical Center, Seoul, Korea
| | - Gianlorenzo Dionigi
- Endocrine Surgery Research Center, Department of Surgical Sciences, University of Insubria, Varese-Como, Varese, Italy
| | - Feng-Yu Chiang
- Department of Otorhinolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University.,Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Xiaoli Liu
- Department of Thyroid and Parathyroid Surgery, China-Japan Union Hospital, Jilin University & Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, Jilin, China
| | - Hui Sun
- Department of Thyroid and Parathyroid Surgery, China-Japan Union Hospital, Jilin University & Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, Jilin, China
| | - Gregory W Randolph
- Division of Thyroid and Parathyroid Surgery, Department of Laryngology and Otology, Massachusetts Eye and Ear Infirmary, Harvard Medical School.,Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, U.S.A
| | - Ralph P Tufano
- Division of Head and Neck Endocrine Surgery, Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland, U.S.A
| | - Hoon Yub Kim
- Department of Surgery, KUMC Thyroid Center, Korea University Hospital, Korea University College of Medicine, Seoul, Korea
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Lee HY, Cho YG, You JY, Choi BH, Kim JY, Wu CW, Chiang FY, Kim HY. Traction injury of the recurrent laryngeal nerve: Results of continuous intraoperative neuromonitoring in a swine model. Head Neck 2015; 38:582-8. [PMID: 25488415 DOI: 10.1002/hed.23934] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/04/2014] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Recurrent laryngeal nerve (RLN) palsy is the most serious complication after thyroidectomy. However, little is known about the degree of traction injury that causes loss of signal. The purpose of this study was to evaluate traction injuries in the swine RLN using continuous intraoperative neuromonitoring (IONM) and determine the traction power that results in loss of signal. METHODS Thirteen swine underwent traction injury to the RLNs with continuous IONM, and stress-strain curves were determined for 8 nerves using the universal material testing machine in an ex vivo model. RESULTS Traction injury at a mean power of 2.83 MPa caused loss of signal. The mean physiologic limit strain and tensile strength of the swine RLNs were found to be 15.0% and 4.9 MPa, respectively. Histological analysis showed no abnormal structural findings. CONCLUSION Traction injury of swine RLNs causes loss of signal at a power of 2.83 MPa. However, all injured nerves recovered within 7 days with no observed structural damage.
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Affiliation(s)
- Hye Yoon Lee
- Department of Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - Young Geon Cho
- Advanced Materials Characterization Laboratory at School of Mechanical Engineering, Korea University, Seoul, Korea
| | - Ji Young You
- Department of Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - Byoung Ho Choi
- Advanced Materials Characterization Laboratory at School of Mechanical Engineering, Korea University, Seoul, Korea
| | - Joon Yub Kim
- Department of Orthopaedic Surgery, Myongji Hospital, Seoul, Korea
| | - Che-Wei Wu
- Department of Otolaryngology - Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Taiwan
| | - Feng-Yu Chiang
- Department of Otolaryngology - Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Taiwan
| | - Hoon Yub Kim
- Department of Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
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Lin YC, Dionigi G, Randolph GW, Lu IC, Chang PY, Tsai SY, Kim HY, Lee HY, Tufano RP, Sun H, Liu X, Chiang FY, Wu CW. Electrophysiologic monitoring correlates of recurrent laryngeal nerve heat thermal injury in a porcine model. Laryngoscope 2015; 125:E283-90. [PMID: 26010439 DOI: 10.1002/lary.25362] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/03/2015] [Indexed: 11/12/2022]
Abstract
OBJECTIVES/HYPOTHESIS Thermal injury to the recurrent laryngeal nerve (RLN) may not be visually apparent and may go unrecognized intraoperatively. This study aimed to investigate the heat thermal tolerance of RLN and evaluate the electrophysiologic correlates of electromyographic (EMG) signal change during an acute RLN heat damage. STUDY DESIGN Prospective porcine model with continuous intraoperative neuromonitoring (CIONM). METHODS Ten pigs (20 RLNs) undergoing CIONM had their EMG tracings recorded and correlated with heated normal saline (NS) irrigation of varying temperature and duration. RESULTS In the initial pilot study, the EMG was without change during incremental heated NS irrigation (40/45/50/55 °C for 60 seconds), but adverse EMG combined events (CE) (amplitude decrease with a concordant latency increase) occurred and degraded to loss of signal (LOS) (by 17.5 ± 1.3 seconds) when the temperature was elevated to 60 °C (n = 4). Another 16 RLNs were evaluated to further compare the EMG pattern after various degrees of thermal stress (60/70 °C for 30/20 seconds). Electromyographic recordings showed CEs and LOS in all RLNs, and only six of eight RLNs with 60 °C exposure showed slight EMG amplitude recovery (16%-35%) after 20 minutes. None of the injured nerve segments were visually apparent, but all were detectable by IONM. CONCLUSION Sixty degrees Celsius is a critical temperature to cause RLN thermal injury. Continuous intraoperative neuromonitoring can be used as a tool for the early detection of acute thermal stress and may guide use of energy-based devices during thyroid procedures. LEVEL OF EVIDENCE N/A.
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Affiliation(s)
- Yi-Chu Lin
- Graduate Institute of Clinical Medicine, Faculty of Medicine, College of Medicine, Department of Otorhinolaryngology-Head and Neck Surgery, Kaohsiung, Taiwan
| | - Gianlorenzo Dionigi
- First Division of Surgery, Research Center for Endocrine Surgery, Department of Surgical Sciences and Human Morphology, University of Insubria (Como-Varese), Varese, Italy
| | - Gregory W Randolph
- Division of Thyroid and Parathyroid Endocrine Surgery, Department of Laryngology and Otology, Massachusetts Eye and Ear Infirmary, Endocrine Surgery Service, Division of Surgical Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - I-Cheng Lu
- Department of Anesthesiology, Kaohsiung Medical University Hospital, (KMU), Kaohsiung, Taiwan
| | - Pi-Ying Chang
- Department of Anesthesiology, Kaohsiung Medical University Hospital, (KMU), Kaohsiung, Taiwan
| | - Shan-Yin Tsai
- Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hoon Yub Kim
- Department of Surgery, KUMC Thyroid Center, Korea University Hospital, Korea University College of Medicine, Seoul, Korea
| | - Hye Yoon Lee
- Department of Surgery, KUMC Thyroid Center, Korea University Hospital, Korea University College of Medicine, Seoul, Korea
| | - Ralph P Tufano
- Division of Head and Neck Endocrine Surgery, Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland, U.S.A
| | - Hui Sun
- Department of Thyroid and Parathyroid Surgery, China-Japan Union Hospital, Jilin University and Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, Jilin Province, China
| | - Xiaoli Liu
- Department of Thyroid and Parathyroid Surgery, China-Japan Union Hospital, Jilin University and Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, Jilin Province, China
| | - Feng-Yu Chiang
- Graduate Institute of Clinical Medicine, Faculty of Medicine, College of Medicine, Department of Otorhinolaryngology-Head and Neck Surgery, Kaohsiung, Taiwan
| | - Che-Wei Wu
- Graduate Institute of Clinical Medicine, Faculty of Medicine, College of Medicine, Department of Otorhinolaryngology-Head and Neck Surgery, Kaohsiung, Taiwan
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Chiang FY, Lu IC, Chang PY, Sun H, Wang P, Lu XB, Chen HC, Chen HY, Kim HY, Dionigi G, Wu CW. Stimulating dissecting instruments during neuromonitoring of RLN in thyroid surgery. Laryngoscope 2015; 125:2832-7. [DOI: 10.1002/lary.25251] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 01/30/2015] [Accepted: 02/11/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Feng-Yu Chiang
- Department of Otorhinolaryngology-Head and Neck Surgery; Kaohsiung Medical University (KMU); Kaohsiung Taiwan
- Faculty of Medicine; Graduate Institute of Clinical Medicine, and Department of Respiratory Therapy, College of Medicine, KMU; Kaohsiung Taiwan
| | - I-Cheng Lu
- Department of Anesthesiology; Kaohsiung Medical University (KMU)
- Faculty of Medicine; Graduate Institute of Clinical Medicine, and Department of Respiratory Therapy, College of Medicine, KMU; Kaohsiung Taiwan
| | - Pi-Ying Chang
- Department of Anesthesiology; Kaohsiung Medical University (KMU)
| | - Hui Sun
- Department of Thyroid and Parathyroid Surgery; China-Japan Union Hospital, Jilin University & Jilin Provincial Key Laboratory of Surgical Translational Medicine; Changchun Jilin
| | - Ping Wang
- Department of Surgery; the 2nd Affiliated Hospital, Zhejiang University School of Medicine; Zhejiang
| | - Xiu-Bo Lu
- Department of Thyroid Surgery; the first Affiliated Hospital of Zhengzhou University; Henan China
| | - Hui-Chun Chen
- Department of Nursing; Kaohsiung Medical University Hospital, Kaohsiung Medical University (KMU); Kaohsiung Taiwan
| | - Hsiu-Ya Chen
- Department of Anesthesiology; Kaohsiung Medical University (KMU)
| | - Hoon Yub Kim
- Department of Surgery; Korea University College of Medicine (h.y.k.); Seoul Korea
| | - Gianlorenzo Dionigi
- Endocrine Surgery Research Center; Department of Surgical Sciences and Human Morphology; University of Insubria; Varese-Como Varese Italy
| | - Che-Wei Wu
- Department of Otorhinolaryngology-Head and Neck Surgery; Kaohsiung Medical University (KMU); Kaohsiung Taiwan
- Faculty of Medicine; Graduate Institute of Clinical Medicine, and Department of Respiratory Therapy, College of Medicine, KMU; Kaohsiung Taiwan
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Abstract
Intraoperative neurophysiological monitoring of the vagus and recurrent laryngeal nerves is increasingly used during thyroidectomy, parathyroidectomy, skull base surgery, and cervical discectomy with fusion. Monitoring can assist in nerve localization and in reducing the incidence of neural trauma. To be effective, however, monitoring must be correctly implemented and the results interpreted based on an in-depth understanding of technique and the surgical structures at risk. Because "poor monitoring is worse than no monitoring" all members of the surgical monitoring team must have training specific to laryngeal recording to maximize its benefit and minimize pitfalls. This publication will review pertinent anatomy and neurophysiology as well as technical and interpretative factors.
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Phelan E, Schneider R, Lorenz K, Dralle H, Kamani D, Potenza A, Sritharan N, Shin J, W. Randolph G. Continuous vagal IONM prevents recurrent laryngeal nerve paralysis by revealing initial EMG changes of impending neuropraxic injury: A prospective, multicenter study. Laryngoscope 2014; 124:1498-505. [DOI: 10.1002/lary.24550] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 11/20/2013] [Accepted: 11/25/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Eimear Phelan
- Division of Thyroid and Parathyroid Surgery; Department of Laryngology and Otology; Massachusetts Eye and Ear Infirmary; Harvard Medical School; Boston Massachusetts
| | - Rick Schneider
- Division General-Visceral and Vascular Surgery; University of Halle-Wittenberg; Halle Germany
| | - Kerstin Lorenz
- Division of Surgical Oncology; Department of Surgery; Massachusetts General Hospital; Harvard Medical School; Boston Massachusetts
| | - Henning Dralle
- Division General-Visceral and Vascular Surgery; University of Halle-Wittenberg; Halle Germany
| | - Dipti Kamani
- Division of Thyroid and Parathyroid Surgery; Department of Laryngology and Otology; Massachusetts Eye and Ear Infirmary; Harvard Medical School; Boston Massachusetts
| | - Andre Potenza
- Division of Thyroid and Parathyroid Surgery; Department of Laryngology and Otology; Massachusetts Eye and Ear Infirmary; Harvard Medical School; Boston Massachusetts
| | - Niranjan Sritharan
- Division of Thyroid and Parathyroid Surgery; Department of Laryngology and Otology; Massachusetts Eye and Ear Infirmary; Harvard Medical School; Boston Massachusetts
| | - Jenifer Shin
- Division of Thyroid and Parathyroid Surgery; Department of Laryngology and Otology; Massachusetts Eye and Ear Infirmary; Harvard Medical School; Boston Massachusetts
| | - Gregory W. Randolph
- Division of Thyroid and Parathyroid Surgery; Department of Laryngology and Otology; Massachusetts Eye and Ear Infirmary; Harvard Medical School; Boston Massachusetts
- Division of Surgical Oncology; Department of Surgery; Massachusetts General Hospital; Harvard Medical School; Boston Massachusetts
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35
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Lee C, Stack BC. Intraoperative neuromonitoring during thyroidectomy. Expert Rev Anticancer Ther 2014; 11:1417-27. [DOI: 10.1586/era.11.97] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Dralle H, Lorenz K, Schabram P, Musholt T, Dotzenrath C, Goretzki P, Kußmann J, Niederle B, Nies C, Schabram J, Scheuba C, Simon D, Steinmüller T, Trupka A. Intraoperatives Neuromonitoring in der Schilddrüsenchirurgie. Chirurg 2013; 84:1049-56. [DOI: 10.1007/s00104-013-2656-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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37
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Dionigi G, Donatini G, Boni L, Rausei S, Rovera F, Tanda ML, Kim HY, Chiang FY, Wu CW, Mangano A, Rulli F, Alesina PF, Dionigi R. Continuous monitoring of the recurrent laryngeal nerve in thyroid surgery: a critical appraisal. Int J Surg 2013; 11 Suppl 1:S44-6. [DOI: 10.1016/s1743-9191(13)60014-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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38
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Intraoperative neural monitoring in thyroid cancer surgery. Langenbecks Arch Surg 2013; 399:199-207. [DOI: 10.1007/s00423-013-1141-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 11/03/2013] [Indexed: 10/26/2022]
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Wu CW, Dionigi G, Sun H, Liu X, Kim HY, Hsiao PJ, Tsai KB, Chen HC, Chen HY, Chang PY, Lu IC, Chiang FY. Intraoperative neuromonitoring for the early detection and prevention of RLN traction injury in thyroid surgery: a porcine model. Surgery 2013; 155:329-39. [PMID: 24084598 DOI: 10.1016/j.surg.2013.08.015] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 08/12/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND Operative traction of the thyroid lobe is a necessary component of thyroid surgery. This surgical maneuver can cause traction injury of the recurrent laryngeal nerve (RLN), and this complication has been reported to be the most common mechanism of nerve injury. The goal of this study was to investigate the electromyographic (EMG) signal pattern during an acute RLN traction injury and establish reliable strategies to prevent the injury using intraoperative neuromonitoring (IONM). METHODS Fifteen piglets (30 RLNs) underwent IONM via automated periodic vagal nerve stimulation and had their EMG tracings recorded and correlated with various models of nerve injury. RESULTS In the pilot study, a progressive, partial EMG loss was observed under RLN tractions with different tension (n = 8). The changes in amplitudes were more marked and consistent than were the changes in latency. The EMG gradually gained partial recovery after the traction was relieved. Among the nerves injured with electrothermal (n = 4), clamping (n = 1), and transection (n = 1) models, the EMG showed immediate partial or complete loss, and no gradual EMG recovery was observed. Another 16 RLNs were used to investigate the potential of EMG recovery after different extents of RLN traction. We noted the EMG showed nearly full recovery if the traction stress was relieved before the loss of signal (LOS), but the recovery was worse if prolonged or repeated traction was applied. The mean restored amplitudes after the traction was relieved before, during, and after the LOS were 98 ± 3% (n = 6), 36 ± 4% (n = 4), and 15 ± 2% (n = 6), respectively. CONCLUSION RLN traction injury showed graded, partial EMG changes; early release of the traction before the EMG has degraded to LOS offers a good chance of EMG recovery. IONM can be used as a tool for the early detection of adverse EMG changes that may alert surgeons to correct certain maneuvers immediately to prevent irreversible nerve injury during the thyroid operation.
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Affiliation(s)
- Che-Wei Wu
- Institute of Clinical Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Faculty of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Otolaryngology, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Gianlorenzo Dionigi
- Endocrine Surgery Research Center, Department of Surgical Sciences, University of Insubria, Varese-Como, Varese, Italy
| | - Hui Sun
- Department of Thyroid and Parathyroid Surgery, China-Japan Union Hospital, Jilin University & Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, Jilin Province, China
| | - Xiaoli Liu
- Department of Thyroid and Parathyroid Surgery, China-Japan Union Hospital, Jilin University & Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, Jilin Province, China
| | - Hoon Yub Kim
- Department of Surgery, College of Medicine, Korea University, Seoul, Korea
| | - Pi-Jung Hsiao
- Faculty of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Endocrinology and Metabolism Division, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Kuo-Bow Tsai
- Faculty of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Pathology, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hui-Chun Chen
- Department of Nursing, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hsiu-Ya Chen
- Department of Anesthesiology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Pi-Ying Chang
- Department of Anesthesiology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - I-Cheng Lu
- Faculty of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Anesthesiology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Feng-Yu Chiang
- Institute of Clinical Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Faculty of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.
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Chuang YC, Huang SM. Protective effect of intraoperative nerve monitoring against recurrent laryngeal nerve injury during re-exploration of the thyroid. World J Surg Oncol 2013; 11:94. [PMID: 23618223 PMCID: PMC3660170 DOI: 10.1186/1477-7819-11-94] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Accepted: 03/26/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Previous thyroid or parathyroid surgery induces scarring or distorts anatomy, and increases the risk of recurrent laryngeal nerve (RLN) injury for a reoperation. The benefit of intraoperative nerve monitoring (IONM) for re-exploration (a second nerve exploration) and reoperation has not been established. METHODS Two hundred and ten patients were given a thyroid or parathyroid reoperation at our hospital between 2001 and 2010. Using IONM, we re-explored 56 patients who had been operated on before June 2007. The injury rate in these patients was compared with that of the 15 patients re-explored without IONM between 2001 and 2006. RESULTS Of the 70 nerves that were re-explored using IONM, only one was incidentally injured, significantly fewer than the three injured in the 15 nerves re-explored without using IONM (1.43% vs. 20%, P = 0.0164). CONCLUSIONS IONM helped prevent RLN damage when re-exploring nerves during thyroid and parathyroid surgery. We recommend the routine use of IONM in thyroid and parathyroid reoperations.
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Affiliation(s)
- Yu-Chuan Chuang
- Department of Surgery, National Cheng Kung University Hospital, Tainan 704, Taiwan
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Schneider R, Bures C, Lorenz K, Dralle H, Freissmuth M, Hermann M. Evolution of Nerve Injury with Unexpected EMG Signal Recovery in Thyroid Surgery Using Continuous Intraoperative Neuromonitoring. World J Surg 2012. [DOI: 10.1007/s00268-012-1853-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Schneider R, Randolph GW, Sekulla C, Phelan E, Thanh PN, Bucher M, Machens A, Dralle H, Lorenz K. Continuous intraoperative vagus nerve stimulation for identification of imminent recurrent laryngeal nerve injury. Head Neck 2012; 35:1591-8. [PMID: 23169450 DOI: 10.1002/hed.23187] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2012] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Conventional intraoperative nerve monitoring, predicated on intermittent stimulation, can predict recurrent laryngeal nerve (RLN) palsy only after the damage has been done. METHODS Fifty-two patients (52 nerves at risk) who underwent continuous intraoperative nerve monitoring (CIONM) for thyroid surgery via vagus nerve stimulation had their electromyographic (EMG) tracings recorded and correlated with surgical maneuvers and postoperative RLN function. RESULTS There was 1 imminent loss of signal (LOS) with intraoperative signal recovery and there were 4 losses of signal with corresponding unilateral transient RLN palsy. When EMG amplitude decreased >50% and EMG latency increased >10%, LOS and postoperative RLN palsy were noted in 4 of 8 patients (50%) who had multiple combined events. In 9 of 13 patients (70%) who developed adverse EMG changes, modification of the causative surgical maneuver resulted in recovery of those EMG changes and aversion of impending RLN palsy. CONCLUSION CIONM reliably signaled impending nerve injury, enabling immediate corrective action.
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Affiliation(s)
- Rick Schneider
- Department of General, Visceral, and Vascular Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
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Abstract
PURPOSE OF REVIEW Laryngeal nerve injuries are among the most important complications of thyroidectomy. Recently, the use of neuromonitoring has been increasingly employed in order to predict and document nerve function at the end of thyroidectomy. RECENT FINDINGS There is much controversy in recent studies concerning neuromonitoring in thyroid surgery. Some authors believe that the method does not bring any additional reduction in the paralysis rate of the laryngeal nerves. Other researchers defend its use only in selected cases and in very specific situations. Finally, some much respected surgeons advocate the routine use of neuromonitoring in all thyroidectomies. SUMMARY In this review, we try to present relevant recent publications dealing with this still controversial subject, emphasizing the advantages and disadvantages of neuromonitoring in thyroidectomy.
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Friedrich C, Ulmer C, Rieber F, Kern E, Kohler A, Schymik K, Thon KP, Lamadé W. Safety analysis of vagal nerve stimulation for continuous nerve monitoring during thyroid surgery. Laryngoscope 2012; 122:1979-87. [DOI: 10.1002/lary.23411] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 04/11/2012] [Accepted: 04/13/2012] [Indexed: 01/27/2023]
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Lamadé W, Ulmer C, Friedrich C, Rieber F, Schymik K, Gemkow HM, Koch KP, Göttsche T, Thon KP. [Signal stability as key requirement for continuous intraoperative neuromonitoring]. Chirurg 2012; 82:913-20. [PMID: 21455808 DOI: 10.1007/s00104-011-2080-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Postoperative recurrent laryngeal nerve (RLN) palsy is a well-known and dreaded complication of thyroid surgery. Continuous intraoperative neuromonitoring (CIONM) has been developed in order to provide an effective real-time surveillance of the RLN to its full extent and to detect subtle changes in nerve conductivity. A key requirement for a reliable interpretation of CIONM is signal stability. PATIENTS AND METHODS In a prospective randomized controlled pilot study 24 patients corresponding to 30 nerves at risk (NaR) were included to compare a newly developed, flexible, saxophone-shaped backstrap electrode for vagal stimulation (16 NaR) to a commercially available CE-marked cylindrical and rigid electrode (14 NaR). Electrode applicability, safety and signal stability were analyzed by assessment of electrode implantation times, stimulation currents, EMG amplitudes and electrode displacement rates. RESULTS Implantation and extraction was significantly faster and easier with the saxophone-shaped backstrap electrode. Accidental electrode displacement occurred up to eight times per operation when applying the cylindrical electrode, while a total of two displacements resulted using the backstrap electrode in this study. Stimulation currents necessary for supramaximal RLN stimulation were significantly lower using the newly developed electrode. At the same time, significantly greater stable EMG amplitudes resulted using the new saxophone-shaped electrode. No RLN palsy occurred during the study. CONCLUSIONS According to the data, only the saxophone-shaped backstrap electrode provided the signal stability required for CIONM. The closed electrode geometry with isolated contacts for nerve stimulation and defined current entry provide the prerequisites required for reliable continuous intraoperative neuromonitoring.
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Affiliation(s)
- W Lamadé
- Abteilung für Allgemein- und Visceralchirurgie mit Schwerpunkt Tumor- und minimal-invasive Chirurgie, Robert-Bosch-Krankenhaus, Stuttgart, Deutschland.
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Lamadé W, Ulmer C, Rieber F, Friedrich C, Koch KP, Thon KP. New Backstrap Vagus Electrode for Continuous Intraoperative Neuromonitoring in Thyroid Surgery. Surg Innov 2011; 18:206-13. [DOI: 10.1177/1553350611409955] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Introduction. Continuous intraoperative neuromonitoring (CIONM) via vagal nerve stimulation allows real-time surveillance of the recurrent laryngeal nerve during thyroid surgery. However, for effective CIONM, subtle changes in recurrent laryngeal nerve conductivity have to be detected. A newly developed stimulation electrode that provides stable nerve stimulation and safe application is presented. Methods. For electrode validation, current distribution was simulated with the finite element method. Mechanical characteristics were assessed through bench testing. Clinical evaluation was initiated with 11 thyroid surgeries. Results. Experimental and clinical results led to the development of a tripolar gold/polyimide electrode mounted onto a backstrap-shaped silicone body. It facilitated rapid electrode implantation and extraction (median implantation time 4 ± 19 seconds). Peak extraction force was 570 mN. Median supramaximal stimulation currents were 2.00 ± 0.95 mA and resulted in reliable electromyogram responses (median 3.1 ± 3.0 mV). No intraoperative electrode dislocations occurred, and no postoperative nerve palsy was observed. Conclusion. The new backstrap vagal stimulation electrode meets the requirements for reliable CIONM.
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Affiliation(s)
| | | | | | | | - Klaus P. Koch
- University of Applied Sciences Trier, Trier, Germany
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Electromyographic endotracheal tube placement during thyroid surgery in neuromonitoring of recurrent laryngeal nerve. Kaohsiung J Med Sci 2011; 27:96-101. [DOI: 10.1016/j.kjms.2010.08.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Accepted: 08/25/2010] [Indexed: 11/21/2022] Open
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Electromyographic Study of Differential Sensitivity to Succinylcholine of the Diaphragm, Laryngeal and Somatic Muscles: A Swine Model. Kaohsiung J Med Sci 2010; 26:640-6. [DOI: 10.1016/s1607-551x(10)70098-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2010] [Accepted: 09/13/2010] [Indexed: 11/23/2022] Open
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