The Digisonic® SP is the latest version of
implanted receiver developed by Neurelec.
It has been available commercially since 2004.
The receiver comes in the form of a small
ceramic box sealed with a titanium base.

Digisonic® SP is compatible with Digi SP and Digi SP'K processors.

General features
  • Receiver dimensions: 4 mm edge - 5,5 mm centre - 29 mm diameter.
  • Materials: Titanium base - Ceramic cover Al2O3- (99,6%).
  • Electrodes in platinum-iridium.
  • Fixation with two pre-positioned screws.
Electrode array features
  • 20 active electrodes.
  • Active length of the electrode array: 25 mm.
  • Base diameter: 0,9 mm (advised size of the cochleostomy).
  • Apex diameter: 0,5 mm.
  • Extra-cochlear section diameter: 1,1 mm.
  • Electrode surface: 0,8 mm2 to 1,8 mm2
  • 2 ground electrodes.
  • Short version Digisonic® SP SI (Short Insertion) for residual hearing:
    12 electrodes - 15 mm insertion.
Stimulation features
  • 20 channels. Current or voltage stimulation.
  • Monopolar/common-ground stimulation through biphasic pulses.
  • Capacitive coupling on each of the 20 electrodes: averaged residual current less than 100 nA.
  • Selectable pulse amplitude.
  • Pulse duration: from 1 to 120 µs (resolution = 0,5 µs).
  • Stimulation frequency: 24 000 pps (pulses per second).
  • Electrode impedance less than 2 k?.

Objectives measures
  • Objective measures with Electrical Auditory Brainstem Responses and
    Digistim® SP system. Windows 98 SE, ME, 2000 and XP compatible.
  • Electrode impedance measurement by telemetry.

Contents of Digisonic®SP
  • 1 Digisonic®SP implant - 1 Silicone dummy implant
    2 Screws - 1 Owner card - 1 Instruction for use - 1 Implantation form
    1 Explantation form - 1 Warranty certificate.
DX10/SP Implant alone
DX10/SP-BTE Full System with Digi SP processor
DX10/SP-K Full System with Digi SP'K processor
DX10/SP-2PE Double-array cochlear implant for ossified cochlea
with Digi SP processor
DX10/SP-SI Implant with short electrode array for residual
hearing