Main peak interleaved sampling (MPIS) strategy: effect of stimulation rate variations on speech perception in adult cochlear implant recipients using the Digisonic SP cochlear implant.
CONCLUSIONS
Data obtained from a cohort of 10 post-lingually deaf adult patients indicated that use of a higher stimulation rate, in the setting of the main peak interleaved sampling (MPIS) strategy coupled with the Neurelec-MXM Digisonic SP cochlear implant system, gives a significant advantage in terms of speech perception if compared with a lower rate, especially in a noisy environment.


OBJECTIVE
To evaluate speech recognition performances in post-lingually deaf adult cochlear implant recipients using two different stimulation rates (260 pps/e and 600 pps/e) in the setting of the MPIS strategy combined with the MXM-Neurelec Digisonic SP cochlear implant system.


METHODS
Ten post-lingually deaf adults who consecutively received a Neurelec-MXM Digisonic SP device at the CI Center of the University of Parma participated in the study. The study was conducted prospectively as a within-subject repeated measures (ABA protocol) between January 2007 and January 2008. Each subject was exposed to and sequentially tested with two different rates of stimulation (260 pps/e and 600 pps/e), in quiet and in a noisy environment. Statistical analysis was performed on the data obtained.


RESULTS
Subjects using the MPIS strategy with a stimulation rate of 600 pps/e performed significantly better in words and phrases recognition tests in both a noisy and a quiet environment.
Department of Otolaryngology - Head and Neck Surgery, Section of Middle Ear Microsurgery and Otoneurosurgery, University of Parma, Parma, Italy. f_dilella@yahoo.it
Filippo
F
Di Lella
Andrea
A
Bacciu
Enrico
E
Pasanisi
Vincenzo
V
Vincenti
Maurizio
M
Guida
Salvatore
S
Bacciu
D000161:Acoustic Stimulation; D000328:Adult; D000368:Aged; D003054:Cochlear Implants; D003638:Deafness / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010470:Perceptual Masking; D011474:Prosthesis Design; D013067:Speech Perception; D013069:Speech Reception Threshold Test