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1 results

  • Effectiveness of the nucleus SmartNav system in detecting and preventing electrode tip fold-overs: a multi-centre retrospective analysis of 213 cochlear implantations

  • Mehmet Ekrem Zorlu, Emirhan Akyol, Secaattin Gülşen, Recep Karamert, Mehmet Birol Ugur, Hakan Tutar
  • Journal:
    The Journal of Laryngology & Otology , First View
    Published online by Cambridge University Press:
    07 January 2026, pp. 1-7
    • Article
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  • Objectives

    This study aimed to evaluate the effectiveness of the SmartNav in detecting tip fold-over during cochlear implantation and to compare angular insertion depth measurements obtained via SmartNav and transorbital X-ray imaging.

    Methods

    This retrospective multicentre study included patients with normal cochlear anatomy, comprising 163 individuals and 213 ears who underwent cochlear implantation using Nucleus CI522 and CI622 systems at Gazi University Faculty of Medicine and Gaziantep City Hospital.

    Results

    Of the 213 cochlear implantations, tip fold-over was detected in 4 implantations (1.88 per cent) intra-operatively with SmartNav. One case (0.47 per cent) of tip fold-over was not detected by SmartNav and identified post-operatively through X-ray imaging. SmartNav showed a sensitivity of 80 per cent, specificity of 100 per cent. A strong correlation was found between SmartNav and X-ray angular insertion depth measurements (p < 0.001).

    Conclusion

    The SmartNav is a reliable tool for the intra-operative detection of tip fold-overand the assessment of angular insertion depth in patients with normal cochlear anatomy.