After cochlear implantation, cochlear nerve is stimulated by giving a current over the electrodes placed in the cochlea and the current is measured by electrically evoked Compound Action Potential (ECAP).This ECAP is measured intra operatively, after 4 weeks( at switch on), after 3months and 6 months following cochlear implantation.
After cochlear implantation, cochlear nerve is stimulated by giving a current over the electrodes placed in the cochlea and the current is measured by electrically evoked Compound Action Potential (ECAP).This ECAP is measured intra operatively, 4 weeks(at switch on) and after 3months and 6 months following cochlear implantation. Neural Response Telemetry (NRT) is a quick and non-invasive way of recording ECAP of the peripheral auditory nerves in-situ. It gives clinicians valuable information for programming the T- (Threshold) and C-(Comfort) - levels of the recipient's speech processor map. Intraoperative NRT in conjunction with electrode impedance data can help indicate the integrity of the implanted electrodes and the electrode/auditory nerve interface, confirming that the implant is functioning correctly intraoperatively.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
44
After cochlear implantation, cochlear nerve is stimulated by giving a current over the electrodes placed in the cochlea and the current is measured by electrically evoked Compound Action Potential (ECAP).
JIPMER
Puducherry, India
Changes in threshold of ECAP after cochlear implantation.
To evaluate changes in threshold of ECAP during cochlear implantation, at switch on( 4 weeks), after 3 months and 6 months following cochlear implantation.
Time frame: during implantation, at switch on( 4 weeks), after 3months and 6months.
Correlate the amplitude of ECAP with T & C levels.
Correlating the amplitude of ECAP with threshold and comfortable levels and creating a MAP.
Time frame: 2 years
Correlate amplitude of ECAP with cochlear nerve diameter measured pre-operatively.
By correlating amplitude of ECAP with cochlear nerve diameter we can determine the site to be operated preoperatively.
Time frame: 2 mins
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