Table 1. Review of Characteristics and Surgical Findings in Revision Casesa.
| Characteristic | No. (%) |
|---|---|
| Total, No. | 43 (100) |
| Causative mechanism | |
| Congenital | 31 (72) |
| Acquired | 12 (28) |
| Idiopathic sudden | 5 (12) |
| Meningitis | 2 (5) |
| Vaccination | 1 (2) |
| Chronic otitis media postoperative | 1 (2) |
| High fever | 2 (5) |
| Chemotherapy | 1 (2) |
| Inner-ear anomaly | |
| Absent | 29 (67) |
| Present | 14 (33) |
| Cerebrospinal fluid leakage | |
| Absent | 38 (88) |
| Present | 5 (12) |
| Electrode insertion | |
| Complete insertion | 40 (93) |
| Incomplete insertion | 3 (7) |
| NRT/ART response | |
| Good response | 36 (84) |
| Partial response | 6 (14) |
| No response | 1 (2) |
Abbreviations: ART, auditory nerve response telemetry; NRT, neural response telemetry.
a
Causative mechanism of hearing loss, underlying diseases, and surgical findings such as cerebrospinal fluid leakage and NRT/ART responses.