ObjectiveThis article outlines the advantages and applicability of the rounded insertion technique of cochlear implants in patients with cystic inner ear malformation. This technique enables the insertion of the maximum number of electrodes and prevents the unwanted entry of electrodes into the internal auditory canal.MethodsWe conducted a retrospective chart review of consecutive patients with cochlear hypoplasia (CH) and/or common cavity (CC) who underwent CI (cochlear implantation) via rounded insertion technique. The position of the electrode array in each patient was confirmed postoperatively via X‐ray, and the number of functional electrodes was confirmed during the mapping process.ResultsThis study included five male and two female patients (median age: 3 years; age range: 2–7 years). Among the seven patients, four received a cochlear implant on the right side, one on the left side, and two bilaterally. Of the nine ears, six were cases of CH, and three were CC. All cochlear implant surgeries via rounded insertion technique were completed without complications. The maximum number of electrode contacts with fair function in the cystic cochlea was confirmed via postoperative X‐ray and the subsequent mapping process.ConclusionThis consecutive series of patients demonstrated the safety and reliability of rounded insertion technique for CI in patients with CH and/or CC.Level of Evidence4 Laryngoscope, 130:2229–2233, 2020
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