[Comprehensive literature review on the application of the otological-surgical planning software OTOPLAN® for cochlear implantation. German version].

Abstract

The size of the human cochlear, measured by the diameter of the basal turn, varies between 7 and 11 mm. For hearing rehabilitation with cochlear implants (CI), the size of the cochlear influences the individual frequency map and the choice of electrode length. OTOPLAN® (CAScination AG [Bern, Switzerland] in cooperation with MED-EL [Innsbruck, Austria]) is asoftware tool with CE marking for clinical applications in CI treatment which allows for precise pre-planning based on cochlear size. This literature review aims to analyze all published data on the application of OTOPLAN®. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were applied to identify relevant studies published in the PubMed search engine between January 2015 and February 2023 using the search terms "otoplan" [title/abstract] OR "anatomy-based fitting" [title/abstract] OR "otological software tool" [title/abstract] OR "computed tomography-based software AND cochlear" [title/abstract]. The systematic review of the literature identified 32studies on clinical use of OTOPLAN® in CI treatment. Most studies were reported from Germany (7out of 32), followed by Italy(5), Saudi Arabia(4), the USA(4), and Belgium(3); 2studies each were from Austria and China, and 1study from France, India, Norway, South Korea, and Switzerland. In the majority of studies(22), OTOPLAN® was used to assess cochlear size, followed by visualizing the electrode position using postoperative images(5), three-dimensional segmentation of temporal bone structures(4), planning the electrode insertion trajectory(3), creating apatient-specific frequency map(3), planning of asafe drilling path through the facial recess(3), and measuring of temporal bone structures(1). To date, OTOPLAN® is the only DICOM viewer with CE marking in the CI field that can process pre-, intra-, and postoperative images in the abovementioned applications.