Table 3. Horizontal and vertical distance from around structures.
| Distance | Mean±SD (mm) |
|---|---|
| Horizontal distance from hyoid bone to external carotid artery | 4.9±0.5 |
| Vertical distance from parallel line of hyoid bone to superior thyroid artery | 0.9±0.4 |
| Horizontal distance from laryngeal prominence to superior thyroid artery | 4.4±0.5 |
| Horizontal distance from inferior border of thyroid cartilage to superior thyroid artery | 3.1±0.6 |