The impact of electrode type on intraoperative and postoperative telemetry measures in cochlear implant using different surgical technique

Hamada, Soha; Omara, Abir; Sefein, Ihab K.; Younes, Amr

doi:10.4103/1012-5574.192548

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…Our results showed that there was no significant difference in impedance between the RW and cochleostomy groups. Hamada et al [13] showed no significant differences in electrode impedance between the RW and cochleostomy approaches for 69 pediatric and adult CI users using 4 types of electrodes 1 month after the surgery. Gu et al [12] compared the impact of the modified minimal access CI approach which was improved basing it on RW approach and cochleostomy approaches for 50 pediatric and adult CI users using the same type of electrode and found that electrode impedance values were significantly lower in the minimal access CI group than in the cochleostomy group at initial activation.…”

Section: Discussionmentioning

confidence: 99%

“…Gu et al [12] showed that the RW approach achieved lower impedance than the cochleostomy approach, whereas Hamada et al [13] held different viewpoints that the RW and cochleostomy approaches provided comparable impacts on electrode impedance. Except for electrode impedance, residual hearing, insertion depth and speech perception were compared between the 2 approaches.…”

Section: Introductionmentioning

confidence: 99%

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Comparable Electrode Impedance and Speech Perception at 12 Months after Cochlear Implantation Using Round Window versus Cochleostomy: An Analysis of 40 Patients

Cheng

Wang

Liu

et al. 2018

ORL

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Objective: The objective of this study was to examine whether cochlear implantation using the round window (RW) route versus cochleostomy achieves comparable electrode impedance and hearing results. Methods: This retrospective analysis included 40 patients receiving a cochlear implant (REZ-1): 20 using the RW approach and the remaining 20 using cochleostomy. Electrode impedance and tone, vowel, consonant, disyllable and sentence perception were measured during and after the implantation. Results: Electrode impedance did not differ significantly between the 2 groups at any time points [F(1, 38) = 1.84; p = 0.184]: 1.87, 5.16, 6.47 and 6.70 kΩ in the RW group versus 2.86, 5.33, 6.92 and 8.16 kΩ in the cochleostomy group at 0, 1, 3 and 12 months, respectively. There was no significant difference between the RW and cochleostomy groups for tone (77.50 vs. 80.50%; p = 0.472), vowel (77.70 vs. 78.65%; p = 0.760), consonant (75.50 vs. 78.25%; p = 0.443), disyllable (78.60 vs. 81.50%; p = 0.317) and sentence (50.90 vs. 52.50%; p = 0.684) perception at 12 months. Conclusion: The RW approach is comparable to cochleostomy in electrode placement as reflected by impedance and function as reflected by tone, vowel, consonant, disyllable and sentence perception.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparable Electrode Impedance and Speech Perception at 12 Months after Cochlear Implantation Using Round Window versus Cochleostomy: An Analysis of 40 Patients

Cheng

Wang

Liu

et al. 2018

ORL

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A Single Intratympanic Triamcinolone Acetonide Administration Elicits Long-Term Reduction in Impedances Following Cochlear Implantation

Nieratschker,

Liepins,

Honeder

et al. 2024

Journal of Otolaryngology - Head & Neck Surgery

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Background Intracochlear fibrosis and inflammation remain important limitations in cochlear implantation (CI). Glucocorticoids are routinely used to ameliorate the inflammatory response following CI. This study investigates the long-term effects of an intratympanically-applied triamcinolone-acetonide suspension on intracochlear impedance changes in CI recipients and investigates differences in drug concentrations and timepoints of injection. Methods A total of 87 patients were included in the study, of whom 39 received an intratympanically-applied triamcinolone-acetonide suspension at either 10 or 40 mg/ml, 1 hour or 24 hours prior to cochlear implantation, while 48 patients served as an untreated control group. Electrode impedances were measured and compared over a period of 3 years following cochlear implantation. Results The preoperative intratympanic application of a triamcinolone-acetonide suspension resulted in significantly lower mean impedances following cochlear implantation compared with an untreated control group at first fitting (4.66 ± 1.3 kΩ to 5.90 ± 1.4 kΩ, P = .0001), with sustained reduction observed over 3 months. A sustained reduction was observed after spatial grouping of the electrode contacts, with significant improvements in both the middle cochlear region over a 24 month period (from 3.97 ± 1.3 kΩ to 5.85 ± 1.3 kΩ, P = .049) and the basal region over a 6 month period (from 5.02 ± 1.3 kΩ to 5.85 ± 1.3 kΩ, P = .008). The injection of 10 mg/ml of triamcinolone-acetonide 1 hour prior to cochlear implantation resulted in higher impedances compared with 40 mg/ml and 24 hour time interval until surgery. Conclusion A single preoperative intratympanic injection of triamcinolone-acetonide significantly reduces electrode impedances across the entire cochlea. This effect is sustained for up to 2 years, after which impedances gradually equalize between the groups. A preoperative triamcinolone-acetonide injection could therefore be a favorable approach to attenuate the immediate tissue response following cochlear implantation.

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The impact of electrode type on intraoperative and postoperative telemetry measures in cochlear implant using different surgical technique

Cited by 2 publications

References 17 publications

Comparable Electrode Impedance and Speech Perception at 12 Months after Cochlear Implantation Using Round Window versus Cochleostomy: An Analysis of 40 Patients

Comparable Electrode Impedance and Speech Perception at 12 Months after Cochlear Implantation Using Round Window versus Cochleostomy: An Analysis of 40 Patients

A Single Intratympanic Triamcinolone Acetonide Administration Elicits Long-Term Reduction in Impedances Following Cochlear Implantation

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