Users Online: 70 Home Print this page Email this page Small font sizeDefault font sizeIncrease font size  
Home | About us | Editorial board | Search | Ahead of print | Current issue | Archives | Submit article | Instructions | Subscribe | Contacts | Login 


RSACP wishes to inform that it shall be discontinuing the dispatch of print copy of JOACP to it's Life members. The print copy of JOACP will be posted only to those life members who send us a written confirmation for continuation of print copy.
Kindly email your affirmation for print copies to dranjugrewal@gmail.com preferably by 30th June 2019.

 

 
Table of Contents
COMMENTARY
Year : 2019  |  Volume : 35  |  Issue : 1  |  Page : 131

Intraoperative neural monitoring in head and neck surgeries: Feasibility and concerns


Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India

Date of Web Publication16-Apr-2019

Correspondence Address:
Manpreet Kaur
All India Institute of Medical Sciences, E 19 Ayurvigyan Nagar, New Delhi - 110 049
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/joacp.JOACP_301_18

Rights and Permissions

How to cite this article:
Kaur M. Intraoperative neural monitoring in head and neck surgeries: Feasibility and concerns. J Anaesthesiol Clin Pharmacol 2019;35:131

How to cite this URL:
Kaur M. Intraoperative neural monitoring in head and neck surgeries: Feasibility and concerns. J Anaesthesiol Clin Pharmacol [serial online] 2019 [cited 2019 Jul 18];35:131. Available from: http://www.joacp.org/text.asp?2019/35/1/131/256399



Intraoperative neural monitoring (IONM) is gaining popularity in head and neck surgeries wherein neural damage cannot always be predicted accurately by just direct visualization. Such a nerve injury increases the morbidity of the patients. Unilateral recurrent laryngeal nerve (RLN) damage increases the aspiration risk and affects the voice, whereas bilateral RLN damage can result in acute airway obstruction. Right RLN is at more risk in thyroid and parathyroid surgery due to anatomic variations, whereas left RLN is at a higher risk in all head and neck surgeries due to longer anatomic course.[1],[2]

Different feasible options for IONM include electromyographical systems on an endotracheal tube (ETT) (surface recording electrodes) or tube adhesive electrodes and transcutaneous stimulation of the more proximal vagus nerve for anatomic assessment of RLN integrity.[3],[4]

Each technique has its own potential advantages and disadvantages. Functioning of ETT surface recording electrode system is dependent on the accurate placement of ETT which may need readjustment of ETT intraoperatively making it time-consuming and cumbersome. Neural integrity monitor electromyogram (EMG) tracheal tube has color-coded contact band placed between the vocal cords and return electrodes placed over the sternum.[5] Previously available tubes had a minimum outer diameter of 8.8 mm, necessitating oral intubation.[5] However, newer modifications have been made available with lesser outer diameter extending its utility to children and small adults. Variants with tube adhesive electrodes are commercially available, but they cause more laryngeal side effects.[6],[7]

For utilization of IONM, it must be remembered that awake fiberoptic with airway blocks is not feasible in such patients. Besides, train-of-four monitoring preparalytic agent and postparalytic recovery are needed to facilitate smooth IONM.

The horizon of IONM has expanded over a past few years and has been included in thyroid surgeries, parathyroid surgeries, esophagectomy, mediastinal lymph node dissection, and cardiothoracic surgeries.[6] IONM can prevent RLN palsy by immediate modification of the causative surgical maneuver on encountering EMG change. However, these techniques are also not full proof and confounders such as tube displacement and inadequate contact of surface electrodes are always there.



 
  References Top

1.
Garas G, Kayani B, Tolley N, Palazzo F, Athanasiou T, Zacharakis E. Is there a role for intraoperative recurrent laryngeal nerve monitoring during high mediastinal lymph node dissection in three-stage oesophagectomy for oesophageal cancer? Int J Surg 2013;11:370-3.  Back to cited text no. 1
    
2.
Merati AL, Shemirani N, Smith TL, Toohill RJ. Changing trends in the nature of vocal fold motion impairment. Am J Otolaryngol 2006;27:106-8.  Back to cited text no. 2
    
3.
Suh I, Yingling C, Randolph GW, Duh QY. A novel method of neuromonitoring in thyroidectomy and parathyroidectomy using transcutaneous intraoperative vagal stimulation. JAMA Surg 2016;151:290-2.  Back to cited text no. 3
    
4.
Wu C, Chiang F, Randolph GW, Dionigi G, Kim H, Lin Y, et al. Transcutaneous recording during intraoperative neuromonitoring in thyroid surgery. Thyroid 2018;28:1500-7.  Back to cited text no. 4
    
5.
Atlas G, Lee M. The neural integrity monitor electromyogram tracheal tube: Anesthetic considerations. J Anaesthesiol Clin Pharmacol 2013;29:403-4.  Back to cited text no. 5
[PUBMED]  [Full text]  
6.
Birkholz T, Saalfrank-Schardt C, Irouschek A, Klein P, Albrecht S, Schmidt J. Comparison of two electromyographical endotracheal tube systems for intraoperative recurrent laryngeal nerve monitoring: Reliability and side effects. Langenbecks Arch Surg 2011;396:1173-9.  Back to cited text no. 6
    
7.
Schneider R, Randolph GW, Sekulla C, Phelan E, Thanh PN, Bucher M, et al. Continuous intraoperative vagus nerve stimulation for identification of imminent recurrent laryngeal nerve injury. Head Neck 2013;35:1591-8.  Back to cited text no. 7
    




 

Top
 
  Search
 
    Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
    Access Statistics
    Email Alert *
    Add to My List *
* Registration required (free)  

 
  In this article
   References

 Article Access Statistics
    Viewed145    
    Printed6    
    Emailed0    
    PDF Downloaded36    
    Comments [Add]    

Recommend this journal