Cochlear SPrint Sound Processor Informações Técnicas descarregar pdf (Página 22)

SECTION ONE | CLINICAL GUIDANCE

Selecting the stimulation mode

The clinician sets the stimulation mode in the Custom Sound software on the

“Open or Create MAP” screen. The software lists the stimulation modes that

are available based on the implant type, sound processor and sound processing

strategy being used. The software deﬁnes the stimulation mode using the location

of the indifferent (reference) electrode relative to the active (stimulated) electrode.

In the Set Levels screen, the electrode selected by number is the active electrode.

Most Freedom and CI500 series implant recipients will be programmed using

MP1+2, but other modes can be selected if necessary. Using one of the MP modes

is recommended because the choice of mode determines which sound processing

strategies are available and MP modes provide the greatest ﬂexibility. Whenever

the clinician chooses a different mode, T- and C- levels must be re-measured in

the new mode. This is because the amount of electrical current required for T- and

C- levels is different for each stimulation mode.

1.6 TELEMETRY MEASUREMENTS

• Telemetry – the bi-directional communication of data using a radio

frequency code. The system sends information to the implant and receives

information back from the implant about the device status.

• Impedance – a measure of the opposition to electrical current ﬂow. An

impedance test identiﬁes short- or open-circuit electrodes on the implant.

• Implant test – a test within the software that measures the impedance

for each electrode.

• Voltage Compliance – the ability of the implant to deliver sufﬁcient

voltage to generate the requested current level.

Figure 4 : Common

Ground stimulation

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