Table 3.
Hearing Preservation Classified by Audiometric Threshold Shifts Before and After Surgery (TSO As Well As First Fitting Appointment).
| ΔPTAlow,post–ΔPTAlow,pre |
ΔPTAlow,firstfit–ΔPTAlow,pre |
|||||
|---|---|---|---|---|---|---|
| ΔPTAlow ≤15 dB | 15 dB< ΔPTAlow ≤30 dB | ΔPTAlow >30 dB | ΔPTAlow ≤15 dB | 15 dB< ΔPTAlow ≤30 dB | ΔPTAlow >30 dB | |
| IED 20 n = 4 | 1 | 1 | 2 | 1 | 2 | 1 |
| 25% | 25% | 50% | 25% | 50% | 25% | |
| IED 24 n = 3 | 0 | 2 | 1 | 0 | 2 | 1 |
| 0% | 66.7% | 33.3% | 0% | 66.7% | 33.3% | |
| IED 28 n = 3 | 0 | 0 | 3 | 0 | 1 | 2 |
| 0% | 0% | 100% | 0% | 33.3% | 66.7% | |
IED = inserted electrode depth; PTA = pure tone average.