Table 1. The sensation of skin using the method of “two-point discrimination” to evaluate the mental nerve injury in a patient after TOETVA.
| Minimal identifiable distance (mm) | Lower lip | Chin | Under the chin | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Touch | Pain | Temperature | Touch | Pain | Temperature | Touch | Pain | Temperature | ||||||
| Ice | Warm | Ice | Warm | Ice | Warm | |||||||||
| Pre-op | 3 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 6 | 6 | 5 | 6 | ||
| POD1 | 12 | 14 | 13 | 13 | 15 | 15 | 15 | 15 | 20 | 18 | 18 | 18 | ||
| POD3 | 9 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 17 | 15 | 15 | 15 | ||
| POM1 | 6 | 7 | 6 | 6 | 8 | 7 | 7 | 7 | 10 | 10 | 10 | 10 | ||
| POM3 | 5 | 5 | 4 | 4 | 5 | 6 | 5 | 5 | 7 | 7 | 6 | 6 | ||
Pre-op, pre-operation; POD1, post-operative day 1; POD3, post-operative day3; POM1, post-operative month 1; POM3, post-operative month 3. TOETVA, transoral endoscopic thyroidectomy vestibular approach.