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Operation Manual of Cochlear Implant
5.2 Performance index
5.1 Basic parameters
01
Working Principle
03
Model
05
Performance Index of the Product
The cochlear system comprises of cochlear implant (hereinafter shortened as implant) and
cochlear implant speech processor (hereinafter shortened as speech processor). Implant is the
implantable part of the cochlear system, whose working principle is to receive the sound signal
processed by speech processor in the radiofrequency way, decode the signal and convert it into
electric currents, and then stimulate the residual acoustic nerve through electrode array on the
cochlea, so as to enable the brain of a severe-to-profound sensorineural deafness sufferer to
sense the sound.
Product model: CS-10A. Product model of the implant is printed on the shell of stimulator at
the place shown as in Figure 2.
04
Serial Number
Serial number of the implant is SN: XXXXXX (e.g. SN: 000001), printed on the shell of
02
Product Structure
Implant is the implantable part of the cochlear system, used with the NSP-60 speech processor
produced by Nurotron Company. Its commissioning shall be conducted with the aid of
NuroSound fitting software. Components of the implant include stimulator, receiving coil,
internal electrode array, external ring electrode and internal magnet.
Figure 1. Product Structure Diagram
Figure 2. Model and Serial Number Diagram
1) Range of electrode impedance: 1KΩ~20KΩ
2) Performance of stimulus signal of electric pulse:
Max. stimulus frequency of every current source: 20 kHz
Width of stimulus pulse: 4µs~425µs
Intensity of stimulus current: 0µA~1900µA
3) Storage condition:
Storage temperature: -10±3 ºC ~55±2ºC
Air pressure: 70kPa±5%~150kPa±5%
No.
Name
Item
Remark
Nominal
parameters
1
Stimulator
Diameter
Thickness
Diameter
Length
Length of internal
electrode array
20mm
6.2mm
33mm
102.4mm
20.5mm
16.0 mm
20.5 mm
24.0 mm
≤9g
3.75mm above bone
Customized based on requirement
Standard Electrode (SD)
Thin Short-length Electrode (TS)
Thin Medium-length Electrode (TM)
Thin Long-length Electrode (TL)
Receiving coil
Electrode
Weight
2
3
4
This part (for surgeons) mainly describes the working principle, product structure, performance
index and operation process of cochlear implant.
External ring electrode
External planar electrode
Internal electrode array
Stimulator
Receiving coil
Internal magnet
Model
Serial Number
stimulator at the place shown as in Figure 2.
