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%) |
aFive patients did not meet the inclusion criteria of this study
bSite of facial nerve injury: one (12.5%) patient suffered from multisegment injury