Automated Periodic Stimulation Electrode Installation: A Technique to Surgically Implant An Automated Stimulation Device on the Vagus Nerve in a Porcine Model

0 views2:46 min • July 8th, 2025

Loading...
$$\rightleftharpoonup{xx}$$ $$\longleftharp{xx}$$, $$\longrightharp{xx}$$,

The vagus nerve, or VN, is the longest cranial nerve that innervates significant regions of the body, including the laryngeal muscles. Frequently, thyroid operations cause injury to the vagus nerve in the larynx, leading to loss of function.

To identify the vagus nerve, prepare an anesthetized pig intubated with an electromyography, or EMG, tube. An EMG tube is a device that aids in monitoring the electrical activity of the laryngeal musculature and provides an open airway for ventilation.

Disinfect the neck region and make a long transverse collar incision to expose the larynx. Lift the skin flap from the collarbone to the U-shaped bone in the midline region of the neck. Dissect the underlying muscles to expose the trachea and nerves.

Using a stimulation probe, briefly deliver electrical impulses to the nerves. Upon stimulation, sodium channels in the cell membrane open and sodium ions enter the cell, depolarizing the membrane. The resulting muscle response is recorded via EMG tube. This enables the identification of the nerve location and its functional status.

Once the vagus nerve is identified, incise the connective tissue layer and use forceps to clip the automated periodic stimulation, or APS electrode around it and connect it to the monitoring system. The APS electrode provides continuous low-level stimulation to the vagus nerve and records the subsequent electromyographic response.

Wearing sterile surgical gloves, use a scalpel to make a 10 to 15-centimeter transverse collar incision to expose the neck and the larynx, and raise the subplatysmal flap one centimeter cranially from the clavicle to the hyoid bone.

Remove the strap muscles to visualize the tracheal rings and nerves, and use a hand-held stimulation probe to carefully expose the external branch of the superior laryngeal nerve, the RLN, and the vagus nerve.

Position an automated periodic stimulation electrode on one side of the vagus nerve for stimulation during continuous intraoperative neural monitoring, and connect the electrode to the monitoring system.

07:53

Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation

Related Videos

0 Views

09:52

An Implantable System For Chronic In Vivo Electromyography

Related Videos

0 Views

09:39

Preparation of Peripheral Nerve Stimulation Electrodes for Chronic Implantation in Rats

Related Videos

0 Views

02:00

Vagus Nerve Stimulation via Chronically Implanted Peripheral Nerve Cuff Electrodes in Rats

Related Videos

0 Views

04:00

Subdural Implantation of a Soft Electrocorticography Array for Cortical Electrophysiology Recording in Minipigs

Related Videos

0 Views

05:12

Implanting an On-Head Electrode System in a Rat Model for Real-Time Seizure Detection

Related Videos

0 Views

06:28

Transcranial Electrical Stimulation of the Motor Cortex in an Awake Rat

Related Videos

0 Views

11:02

Vagus Nerve Stimulation as a Tool to Induce Plasticity in Pathways Relevant for Extinction Learning

Related Videos

0 Views

08:16

Intra-Operative Neural Monitoring of Thyroid Surgery in a Porcine Model

Related Videos

0 Views

07:13

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing

Related Videos

0 Views

Last updated: 1 August 2026