Abstract Details

Title Assessment of the Vagus Nerve Through Ultrasound-based Measurements and Associated Variables

Topic General Neurology

Presentation(s) P2 - Poster Session 2 (11:45 AM-12:45 PM)

Poster/Presentation
Number 4-002

Objective This study aims to investigate ultrasound-based measurements of the vagus nerve through determining reference values of four cross-sectional area (CSA) landmarks, in addition to further assessing relationships between demographic variables and vagus nerve measurements.

Background Currently, there is limited ultrasonographic literature in regards to reference values of the vagus nerve in healthy populations.

Design/Methods This study encompassed 63 healthy participants (mean age = 22; 30 males, 33 females). A GE Cares InSite ultrasound system, equipped with a 12L-RS transducer linear probe, was utilized. The vagus nerve was visualized just prior to the bifurcation point of the common carotid artery and the internal jugular vein within the carotid sheath (proximal landmark) and at the inferior border of the thyroid gland (distal landmark). Bilateral measurements of both anterior-posterior and transverse diameters at these landmarks were collected in order to determine CSA values. Subsequent data analysis involved an ANOVA for group comparisons (male vs. female). Additionally, Spearman correlations were performed to investigate associations between CSAs and demographic variables (age, race).

Results Established CSAs of the vagus nerve are as follows: proximal left (2.54 ± 0.9 mm²), distal left (2.58 ± 1.2 mm²), proximal right (2.32 ± 0.8 mm²), and distal right (2.70 ± 1.0 mm²). No significant differences were observed between left and right landmarks. Males had significantly larger proximal (d= 0.77, p-value= 0.004) and distal (d= 0.93, p-value= 0.001) CSAs on the right side compared to females. No significant associations were observed between CSA landmarks and additional demographic variables (p > 0.05).

Conclusions Our analysis established standardized reference points for the vagus nerve at essential anatomical sites. Furthermore, vagus nerve CSA was significantly larger in males compared to females on the right side for both proximal and distal landmarks, highlighting gender-specific variations.

Authors/Disclosures
Rachal Hegde PRESENTER	Miss Hegde has nothing to disclose.
Japnit Dham	Miss Dham has nothing to disclose.
Hannah Shoctor	No disclosure on file
Eugene Choe (SGU)	No disclosure on file
Neysa Sanghavi	No disclosure on file
Ivonne Meares	No disclosure on file
Bayan Rajamanar	No disclosure on file
Henry Okodaso	No disclosure on file
Haider Hilal	No disclosure on file
Tarek Almabrouk (St George's University)	No disclosure on file
James Coey	No disclosure on file

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