Patients
RESIDUAL
Fifty patients with residual hearing were included (26 female, 24 male). Mean age was 48.2 years (SD 21.4). Randomization in two groups was performed by a random generator (PiP: mean age 48.1 years, 15 female, 15 male; without PiP: mean age 44,5 years, 11 female, 9 male). Residual hearing preoperatively was defined as a hearing threshold of at least 80 dB HL in at least two tested frequencies (air conduction). Residual hearing postoperatively was defined as a hearing threshold of at least 115 dB HL in at least two tested frequencies (air conduction). Audiometric thresholds were measured in regular pre-diagnostic procedures before cochlear implantation. The mean pre-operative PTA