CT-guided electrode deactivation benefits only half of cochlear implant users

Evidence

The findings from electrode deactivation studies are mixed. Noble et al. ( 2014 ) used a CT-guided technique in which preand post-operative scans were used to determine the electrode positioning with respect to the modiolus. Poorly positioned electrodes were deactivated and additional mapping adjustments made. Assessments were conducted at baseline and following a 3–6 week exposure period with the adjusted map. Learning effects were not accounted for. Thirty-six out of 72 (50 %) participants demonstrated a benefit on one outcome measure (CNC words, AzBio sentences (quiet, +10 dB, +5 dB signal-to-noise ratio (SNR)) and BKBSin), 17 had a significant degradation in performance (24 %), three cochlear users had mixed results (4 %) and the final 16 participants did not demonstrate any effect of the de-activation (22 %). — Dijk, Pim van, Physiology, Psychoacoustics and…, 2051

Categorization

• corroborated: 2 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 2051
• XREF: connects to: Cochlear device users benefit less from electrode deactivation than AB and MEDEL users — Dijk, Pim van, Physiology, Psychoacoustics and…, 2051; Electrode deactivation outcomes depend on stimulation rate and filter allocation differences

Broader Connections

• Cochlear device users benefit less from electrode deactivation than AB and MEDEL users #qualifies (0.88) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2051
• Electrode deactivation outcomes depend on stimulation rate and filter allocation differences #expands (0.72)