Does early activation within hours after cochlear implant surgery influence electrode impedances?

Saoji, Aniket A.; Adkins, Weston J.; Graham, Madison K.; Carlson, Matthew L.

doi:10.1080/14992027.2021.1942569

Cited by 9 publications

(10 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…14,15 Activation within hours from surgery seems to not have a significant effect on impedance values after 1 month post-surgery. 28 In addition, it is known that basal electrodes almost in all cases present in-range but higher impedance values than those in the middle and apical electrodes of the array. 10,29 This is supposed to be the consequence of the histologically documented chronic inflammatory/fibrotic reaction involving inflammatory cells, fibrosis, and neo-ossification affecting the part of the cochlea next to the site of the array surgical insertion.…”

Section: Discussionmentioning

confidence: 99%

Long-Term Impedance Trend in Cochlear Implant Users with Genetically Determined Congenital Profound Hearing Loss

et al. 2022

View full text Add to dashboard Cite

Background Impedance is a basic parameter registered at any cochlear implant (CI) fitting section. It is useful in monitoring electrode functioning and the status of the surrounding anatomical structures. Purpose The main aim of this study is to evaluate the 5-year impedance-value trend in patients affected by congenital genetically determined profound hearing loss implanted with Cochlear Nucleus devices. Research Design Observational, retrospective, monocentric study. Study Sample Twenty-seven consecutive patients (9 females: 12.0 ± 7.6 years old; range: 4.2–40.4) with genetic diagnosis of GJB2 mutation causing congenital profound hearing loss who underwent cochlear implantation from 2010 to 2020 with good auditory benefit. Intervention Impedance values of the CIs were obtained from the CIs' programming software that registers those parameters for each follow-up section of each patient. Data Collection and Analysis Impedance values were measured over time (activation, 6, 12, 24, and 60 months after cochlear implantation), for each of the 22 electrodes, in common ground, monopolar 1, monopolar 2, and monopolar 1 + 2 stimulation modes. Results A significant variation was found between CI activation and 6-month follow-up. This difference was found for each of the 22 electrodes. Electrodes 1 to 4 showed higher impedance values compared with all other electrodes in each time interval. Repeated-measures analysis of variance ruled out significant variations in impedance values from 6-month to 5-year follow-up. Conclusions Impedance values were extremely stable after activation, at least for the first 5 years. In these cases, even minimal impedance variations should be carefully evaluated for their possible implications on hearing performance.

show abstract

Section: Discussionmentioning

confidence: 99%

Long-Term Impedance Trend in Cochlear Implant Users with Genetically Determined Congenital Profound Hearing Loss

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Despite the primary concern regarding the rationale behind delayed activation and the mounting body of literature on this subject, there still remains a relative paucity of surgical outcome data. Most studies do not provide granular information on postoperative clinical concerns, electing to use terms such as “no surgical complications.” 3–6,10,12,16,20,21 Other studies did not include any surgical outcome information, as their analysis focused on electrophysiological changes over the postoperative period. 9,13–15,17,18 A handful of studies have published clinical information that sheds some insight on this issue.…”

Section: Feasibility and Safetymentioning

confidence: 99%

“…5 Over the years, several other groups have published their experiences with early activation, ranging from 13 days to the day of surgery in the recovery room. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] An increasing number of publications from a select group of CI centers suggest increased acceptance of these protocols, although no data exist as to how common this practice is in reality.…”

Section: Historymentioning

confidence: 99%

“…Most studies do not provide granular information on postoperative clinical concerns, electing to use terms such as "no surgical complications." [3][4][5][6]10,12,16,20,21 Other studies did not include any surgical outcome information, as their analysis focused on electrophysiological changes over the postoperative period. 9,[13][14][15]17,18 A handful of studies have published clinical information that sheds some insight on this issue.…”

Section: Feasibility and Safetymentioning

confidence: 99%

“…7,25 Even in cases of same-day activation, impedance continues to drop over 24 hours, suggesting that such changes occur irrespective of the early presence of the current. 20 In fact, the duration of the current appears to make little difference in the long-term as well. Multiple studies have found no significant impedance differences between early and traditionally activated patients at 1 month post activation.…”

Section: Electrophysiological Datamentioning

confidence: 99%

See 2 more Smart Citations

Very early activation of cochlear implants: A review of the literature

Coelho

Shiao

2022

Journal of the Chinese Medical Association

View full text Add to dashboard Cite

Cochlear implantation (CI) has become the standard treatment for patients with severe-to-profound hearing loss. To date, an estimated 750,000 individuals spanning the entire lifecycle have benefited from this life-changing technology. Traditionally, the device is not “activated” for 3 to 4 weeks after surgery. However, an increasing number of centers have recently begun to question the conventional wisdom that several weeks are necessary and are activating their patients’ device sooner after CI. This review aimed to provide a comprehensive insight to better understand the feasibility, outcomes, benefits, and limitations of very early cochlear implant activation. Data sources from published medical literature were reviewed. A detailed examination and summary were provided. History and safety were also emphasized. It was observed that approximately 20 studies have reported their experience with very early cochlear implant activation, ranging from the day of surgery to 1 week. Outcome measures are disparate, although there is general agreement that early activation is not only feasible but also provides some real-life benefits to patients and caregivers. The surgical, electrophysiological, audiological, and other outcomes were also reviewed. Very early activation is safe and beneficial in patients with cochlear implants. Many CI centers believe that such a process can lead to improvements in both patient-centered and fiscally responsible care. Although not ideal for all patients, cochlear implant programs may consider this option for their patients.

show abstract