The effect of the cochlear implant electrode position on the neural response telemetry results: A prospective clinical trial at a single center

AbstractObjectives:This paper reports five cases of aberrant cochlear implant electrode array insertion into the vestibular labyrinth. A review of the literature was conducted in order to clarify reasonable preventive and detection strategies and endorse the routine use of intra-operative plain skull X-ray.Methods:The study entailed a clinical case series and literature review. The setting was a tertiary academic referral centre. The following data were evaluated: pre-operative temporal bone computed tomography, operative reports, intra-operative imaging, neural response telemetry/imaging and post-operative imaging.Results:There were no consistent pre-operative risk factors found on computed tomography scans and no reliable intra-operative signs of electrode array misdirection. All misdirections in our case series, and those in the literature, were easily detectable on intra-operative plain film X-ray.Conclusion:These reported cases demonstrate implant misdirection without the surgeon's awareness. Aberrant insertion cannot be anticipated, and neural response telemetry/imaging is not a reliable indicator of misdirection. Routine intra-operative anteroposterior plain X-ray of the head is a reliable indicator of misdirection, and is fast and relatively inexpensive.

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Relation Between Neural Response Telemetry Thresholds, T- and C-Levels, and Loudness Judgments in 12 Adult Nucleus 24 Cochlear Implant Recipients

Ear and Hearing ◽

10.1097/aud.0b013e31806dc16e ◽

2007 ◽

Vol 28 (4) ◽

pp. 495-511 ◽

Cited By ~ 47

Author(s):

Lisa G. Potts ◽

Margaret W. Skinner ◽

Brenda D. Gotter ◽

Michael J. Strube ◽

Chris A. Brenner

Keyword(s):

Cochlear Implant ◽

Neural Response ◽

Neural Response Telemetry ◽

Nucleus 24

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Remote blood pressure monitoring with the wearable SENBIOSYS photoplethysmographic device: study protocol for a single-center, prospective clinical trial (Preprint)

JMIR Research Protocols ◽

10.2196/30051 ◽

2021 ◽

Author(s):

Sara Schukraft ◽

Assim Boukhayma ◽

Stéphane Cook ◽

Antonino Caizzone

Keyword(s):

Blood Pressure ◽

Clinical Trial ◽

Study Protocol ◽

Blood Pressure Monitoring ◽

Prospective Clinical Trial ◽

Single Center ◽

Pressure Monitoring

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Use of Neural Response Telemetry Measures to Objectively Set the Comfort Levels in the Nucleus 24 Cochlear Implant

Journal of the American Academy of Audiology ◽

10.3766/jaaa.17.6.4 ◽

2006 ◽

Vol 17 (06) ◽

pp. 413-431 ◽

Cited By ~ 13

Author(s):

John E. King ◽

Marek Polak ◽

Annelle V. Hodges ◽

Stacy Payne ◽

Fred F. Telischi

Keyword(s):

Cochlear Implant ◽

Predictive Ability ◽

Growth Function ◽

Neural Response ◽

Electrode Impedance ◽

Comfort Levels ◽

Neural Response Telemetry ◽

Alternative Means ◽

Clinical Measurements ◽

Nucleus 24

Cochlear implant programming necessitates accurate setting of programming levels, including maximum stimulation levels, of all active electrodes. Frequently, clinical techniques are adequate for setting these levels; however, they are sometimes insufficient (e.g., very young children). In the Nucleus 24, several methods have been suggested for estimation of comfort levels (C levels) from neural response telemetry (NRT); however, many require co-application of clinical measurements. Data was obtained from 21 adult Nucleus 24 recipients to develop reliable predictions of C levels. Multiple regression analysis was performed on NRT threshold, slope of the NRT growth function, age, length of deafness, length of cochlear implant use and electrode impedance to examine predictive ability. Only the NRT threshold and slope of the growth function measures were significant predictors yielding R2 values from 0.391 to 0.769. Results demonstrated that these measures may provide an alternative means of estimating C levels when other clinical measures are unavailable.

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