What question did this study set out to answer?

To evaluate the incidence of abnormal cochlear implant electrode impedances intraoperatively and at initial activation, and to assess the rates of abnormality resolution and new-onset postoperative failure.

January 9, 2013Otology & Neurotology

How Well Do Cochlear Implant Intraoperative Impedance Measures Predict Postoperative Electrode Function?

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Authors

JGJenny L. Goehring MHMichelle L. Hughes JBJacquelyn L. Baudhuin

Discussion

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Overview

Retrospective review reveals most intraoperative cochlear implant impedance abnormalities resolve by activation in pediatric and adult recipients, suggesting limited need for backup devices.

Key Points

To evaluate the incidence of abnormal cochlear implant electrode impedances intraoperatively and at initial activation, and to assess the rates of abnormality resolution and new-onset postoperative failure.
Retrospective records review conducted at a single tertiary referral center.
Evaluated intraoperative and postoperative impedance telemetry from 194 devices (3,430 total electrodes) implanted in 165 pediatric and adult patients.
Abnormal impedance occurred in 12.4% (24/194) of devices intraoperatively and decreased to 8.2% (16/194) postoperatively, with open circuits predominating over short circuits across both intraoperative (92% vs. 8%) and postoperative (94% vs. 6%) intervals.
Among 78 individual electrodes showing abnormal intraoperative impedance, 82% (64/78; 62 open circuits, 2 short circuits) resolved by initial activation, while 18% (14/78; 12 open circuits, 2 short circuits) remained abnormal.
New-onset impedance abnormalities occurred postoperatively in only 0.17% (6/3,430) of electrodes that tested normal intraoperatively.

Cite This Study

Goehring et al. (2013) studied this question.

synapsesocial.com/papers/6a95d2148372d5bc8453957a https://doi.org/10.1097/mao.0b013e31827c9d71

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January 9, 2013Otology & Neurotology

How Well Do Cochlear Implant Intraoperative Impedance Measures Predict Postoperative Electrode Function?

View Full Paper

Ask AI

Bookmark

Authors

JGJenny L. Goehring MHMichelle L. Hughes JBJacquelyn L. Baudhuin

Discussion

Member takes

Overview

Retrospective review reveals most intraoperative cochlear implant impedance abnormalities resolve by activation in pediatric and adult recipients, suggesting limited need for backup devices.

Key Points

To evaluate the incidence of abnormal cochlear implant electrode impedances intraoperatively and at initial activation, and to assess the rates of abnormality resolution and new-onset postoperative failure.
Retrospective records review conducted at a single tertiary referral center.
Evaluated intraoperative and postoperative impedance telemetry from 194 devices (3,430 total electrodes) implanted in 165 pediatric and adult patients.
Abnormal impedance occurred in 12.4% (24/194) of devices intraoperatively and decreased to 8.2% (16/194) postoperatively, with open circuits predominating over short circuits across both intraoperative (92% vs. 8%) and postoperative (94% vs. 6%) intervals.
Among 78 individual electrodes showing abnormal intraoperative impedance, 82% (64/78; 62 open circuits, 2 short circuits) resolved by initial activation, while 18% (14/78; 12 open circuits, 2 short circuits) remained abnormal.
New-onset impedance abnormalities occurred postoperatively in only 0.17% (6/3,430) of electrodes that tested normal intraoperatively.

Cite This Study

Goehring et al. (2013) studied this question.

synapsesocial.com/papers/6a95d2148372d5bc8453957a https://doi.org/10.1097/mao.0b013e31827c9d71

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