Smith et al developed a simple scale to grade the level of function following facial nerve injury. The authors are from Bristol Royal Infirmary and the Royal Infirmary in Edinburgh.
Regions observed:
(1) face during repose
(2) forehead while wrinkling
(3) eye
(4) mouth
Level of Normal Function |
Scale |
Points |
0% |
0 |
0 |
1 to 25% |
I |
1 |
26 to 50% |
II |
2 |
51 to 75% |
III |
3 |
76 to 100% |
IV |
4 |
where:
• The original table has overlaps at 0%, 25%, 50% and 75%. I adjusted the values so that there would be no overlap.
overall scale =
= SUM(points for all 4 regions) / 4
Interpretation:
• minimum scale: 0
• maximum scale: 4 (indicating normal function)
Specialty: Neurology, Emergency Medicine, Surgery, general, Otolaryngology
ICD-10: ,