4.1 Group 1 (Middle Ear Disease)
For group 1, the 23 patients with middle ear disease, the measured PTA4
values for the air and bone conduction HL are presented in Fig 1. The
dotted and the dashed lines point the indication criteria for the ADHEAR
system (BC PTA4 ≤ 25 dB HL) and for the BAHA 5 Power system (BC PTA4 ≤
55 dB HL), respectively. Fig 1 shows that 23 patients were aided with
the ADHEAR system, while the HL of only 11 patients is within the ADHEAR
criterion. Ten patients were aided with both the ADHEAR and the BAHA 5
Power system, while the HL of 6 patients is within the ADHEAR criterion.