Application of auditory cortical evoked potentials for auditory assessment in people using auditory prosthesis

Abstract

The present study explored the application of auditory cortical evoked potentials (ACEP) in the auditory assessment of people using an auditory prosthesis. There were 126 patients with prelingual deafness who were selected from January 2012-June 2017 from the First People's Hospital of Kunshan (Kunshan, China). HEARLab™ system was used to induce a P1-N1-P2 waveform under the condition of 60 dB sound pressure level at /m/, /g/ and /t/ acoustic stimulations. Speech production ability and auditory perception ability of patients were evaluated by speech intelligibility rating (SIR) and categories of auditory performance (CAP). Extraction rate of P1 waves of patients with auditory prosthesis was higher than that of N1 and P2 waves under different acoustic stimulations. A younger initial age and shorter deafness duration before patients used an auditory prosthesis led to more marked P1-N1-P2 waveforms and longer P1 latencies. At /m/ acoustic stimulation, P1 latency and amplitude were negatively associated with the usage time of auditory prosthesis. There were significant differences in the results of SIR and CAP and the initial age of use of auditory prosthesis and deafness duration before patients used the auditory prosthesis. These findings suggest that ACEP can be used to evaluate the auditory assessment of people using an auditory prosthesis. The initial age of use of an auditory prosthesis and deafness duration can affect the P1-N1-P2 waveform and P1 latency of prelingual deafness.

Keywords: P1 wave; acoustic stimulation; amplitude; auditory cortical evoked potential; auditory prosthesis; categories of auditory performance; latency; speech intelligibility rating.

Figure 1.

Extraction rate of P1, N1 and P2 waves under different acoustic stimulations. Data are presented as a percentage and analyzed via χ² test. *P<0.05 vs. N1 and P2.

Figure 2.

Waveforms of P1, N1 and P2 of auditory prosthesis users with initial age of use ≤8 and >8 years. (A) /m/, (B) /g/ and (C) /t/ acoustic stimulations were used.

Figure 3.

Waveforms of P1, N1 and P2 of auditory prosthesis users with different deafness durations. (A) /m/, (B) /g/ and (C) /t/ acoustic stimulations were used.