TABLE I.
Demographic information for participating subjects. In the middle columns, time is listed as years, months (with averages in the bottom row). Time post CI was calculated from the date of psychophysical testing. SNHL = sensorineural hearing loss. + p = positioner. PTA = pure-tone average at 250, 500, and 1000 Hz. The pre-CI PTA was not available for subject C39, who transferred to our center after implantation.
| Subject | Internal device, electrode array | Ear | Approximate duration of deafness | Pre-CI PTA (dB HL) | Age at CI | Age at testing | Time post CI | Etiology | Sentence Rec. (% correct), Test |
|---|---|---|---|---|---|---|---|---|---|
| C8 | CII HF 1J | L | 3, 0 | 105 | 55, 7 | 63, 11 | 8, 3 | Sudden SNHL | 98%, AzBio |
| C13 | CII HF 1J | L | >3 | 110 | 77, 1 | 87, 5 | 9, 4 | Genetic | 56%, AzBio |
| C17a | HR 90 K HF 1J | R | 5, 0 | 77 | 7, 11 | 14, 5 | 6, 5 | Unknown | 38%, HINT |
| C22 | HR 90 K HF 1J | L | >15 | 95 | 15, 4 | 18, 10 | 3, 5 | Genetic | 62%, HINT |
| C24 | CII HF 1 + p | R | 15, 0 | 115 | 67, 4 | 77, 6 | 10, 1 | Unknown | 62%, AzBio |
| C25 | HR 90 K HF 1J | L | Unknown | 87 | 11, 6 | 19, 7 | 7, 10 | Usher syndrome | 85%, AzBio |
| C26 | HR 90 K HF 1J | R | 13, 0 | 68 | 67, 6 | 71, 5 | 3, 10 | Unknown | 91%, AzBio |
| C29 | HR 90 K HF 1J | R | 2, 0 | 103 | 31, 0 | 35, 2 | 4, 2 | Meningitis | 90%, AzBio |
| C35 | HR 90 K HF 1J | R | 4, 0 | 73 | 84, 7 | 88, 2 | 3, 6 | Unknown | 63%, HINT |
| C39 | HR 90 K HF 1J | R | 0, 6 | Unknown | 63, 0 | 66, 5 | 3, 3 | Unknown | 81%, AzBio |
| C40 | CII HF 1 + p | L | 21, 0 | 87 | 59, 5 | 69, 9 | 10, 9 | Genetic | 70%, AzBio |
| MEANS | 7, 4 | 92 | 46, 5 | 55, 8 | 6, 5 | ||||
a
Subject was explanted and re-implanted; time post implant is relative to the date of the initial device.