What question did this study set out to answer?

This study aims to explore the impact of preoperative glucocorticoid injections on electrode impedance in cochlear implant recipients.

April 4, 2026Open Access

Effects of Preoperative Postauricular Glucocorticoid Injection on Electrode Impedance in Cochlear Implantation

Key Points

This study aims to explore the impact of preoperative glucocorticoid injections on electrode impedance in cochlear implant recipients.
Enrolled 69 participants (44 children and 25 adults)
Participants were assigned to treatment (glucocorticoid injection) or control groups
Electrode impedance measured at multiple time points post-surgery
Data analyzed separately for pediatric and adult cohorts using linear mixed-effects models.
In pediatric cohort, significant interaction between group and time was found but no individual differences at time points
In adult cohort, significant interaction between group and turn observed, with differences in middle turn impedance found (p = 0.033).

Abstract

Objectives: We aimed to investigate the short-term effects of preoperative postauricular glucocorticoid (GC) injection on electrode impedance in cochlear implant (CI) recipients. Methods: A total of 69 participants were enrolled: 44 children ( 0.05). In the adult cohort, a significant interaction between group and turn was identified (F = 3.07, p = 0.049); post hoc analysis demonstrated statistically significant differences in impedance in the middle turn between groups (intervention effect = 1.355 kΩ; 95% CI, 0.115 to 2.596; p = 0.033). Conclusions: Preoperative postauricular GC administration, when combined with intraoperative intratympanic steroid therapy, may be associated with differences in postoperative electrode impedance dynamics and the electrode–tissue interface.

Effects of Preoperative Postauricular Glucocorticoid Injection on Electrode Impedance in Cochlear Implantation

Key Points

Abstract

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