Table 1 Analysis of 8 patients injured at our center
Clinical characteristics | |
|---|---|
Gender | |
 male | 2 (25.0%) |
 female | 6 (75.0%) |
 Age (years) | 35.3 ± 16.5 (5–53) |
Side | |
 right | 6 (75.0%) |
 left | 2 (25.0%) |
Primary disease | |
 cholesteatoma of middle ear | 4 (50.0%) |
 chronic suppurative otitis media | 3 (37.5%) |
 congenital atresia of external auditory canal | 1 (12.5%) |
Type of primary surgery | |
 wall down mastoidectomy | 3 (37.5%) |
 wall up mastoidectomy | 1 (12.5%) |
 tympanoplasty (one case combined with canalplasty) | 4 (50.0%) |
Incidencea | |
 2000–2009 | 0.13% (7/5491) |
 2010–2019 | 0.04% (6/14552) |
Preoperative grade (H-B) | |
 V | 7 (87.5%) |
 VI | 1 (12.5%) |
Preoperative hearing | |
 conductive hearing loss | 3 (37.5%) |
 mixed hearing loss | 5 (62.5%) |
Duration before revision surgery | |
  < 2 months | 6 (75.0%) |
 2–6 months | 2 (25.0%) |
Site of facial nerve injuryb | |
 tympanic segment | 5 (62.5%) |
 geniculate ganglion | 2 (25.0%) |
 fallopian canal intact | 2 (25.0%) |
Degree of facial nerve injury | |
 canal intact and mild edema | 2 (25.0%) |
 edema | 4 (50.0%) |
 sheath defective and edema | 1 (12.5%) |
 completely transected | 1 (12.5%) |
Malformation of facial nerve | |
 fallopian canal dehiscent | 5 (62.5%) |
 anomalous course | 1 (12.5%) |
Inner ear injury | |
 yes | 0 (0.0%) |
 no | 8 (100.0%) |
Facial nerve management | |
 decompression | 7 (87.5%) |
 graft | 0 (0.0%) |
 Anastomosis (combined with rerouting) | 1 (12.5%) |
Postoperative grade (H-B) | |
 I | 2 (25.0%) |
 II | 4 (50.0%) |
 III | 2 (25.0%) |