Table 2 Various EMG recording methods for IONM during thyroidectomy and parathyroidectomy.

From: The transcutaneous electromyography recording method for intraoperative neuromonitoring of recurrent laryngeal nerve during minimally invasive parathyroidectomy

Authors/year

Objects

Control group

Electrode type

Conclusions

Marcus B et al.18

Humans

No

Postcricoid surface electrode

The postcricoid surface electrode method was safe, simple, and effective for IONM

Petro ML et al.19

Humans

No

Transcricothyroid needle electrodes

This technique was sensitive, easy to use, and accurate

Haerle S et al.20

Humans

No

Postcricoid needle electrodes

This method was feasible and reliable compared to the standard vocal cord monitoring

Alon EE et al.21

Humans

No

Transcricothyroid needle electrodes

This method was a safe and reliable technique for bilateral monitoring of RLN

Chiang FY et al.10

Humans

EMG tube

TC needle electrodes

TC electrodes obtained higher and more stable EMG signals as well as fewer false EMG results

Farizon B et al.22

Humans

No

Transcricothyroid needle electrodes

This method predicted a postoperative vocal fold function during a bilateral thyroid surgery

Wu CW et al.23

Porcine model

EMG tube

TC surface electrode

This method confirmed the feasibility for recording EMG signals during IONM

Liddy W et al.24

Humans

EMG tube

TC surface electrodes

This method provided similar and stable EMG signals with equal sensitivity

Zhao Y et al.25

Porcine model

EMG tube

TC needle electrodes

EMG amplitudes were higher and identified RLN injury earlier than ET electrodes

Wu CW et al.26

Porcine model

EMG tube

Transcutaneous surface electrodes

This method was feasible, but amplitudes signals were lower

Li P et al.27

Humans

No

Arytenoid muscle needle electrodes

This method was considered to be safe, feasible, and reliable

Sung ES et al.28

Porcine model

EMG tube

Surface pressure sensor

These sensors were able to identify laryngeal twitching. The stimulus intensity was equivalent to that from conventional vocalis EMG

Lee HS et al.29

Humans

EMG tube

Adhesive skin electrodes

This method was successful in all nerves, but amplitudes signals were lower