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In literature and scientific societies no binding methodical-didactic recommendations or guidelines exist in order to design surgical training courses. The educating institutions plan, organise and evaluate the educational program on their own initiative.Through a research project surgical training courses were investigated through structured surveys, expert discussions with course responsibles and trainers and analysis of participant's questionnaires. The investigation was performed by an pedagogical-psychological research institution. First implementations were installed and immediately included in the running process of evaluation.From the evaluation, specific alterations in the organisational and micro didactic process were implemented. In addition, changes in a long term process had to be implemented such as: (a) conception of the trainer role, (b) giving feedback and judge performance and (c) provide contents in a sophisticated manner.For advanced medical training providers a long term cooperation with a pedagogical institution seems to be highly advisable.

The feasibility of a navigate-controlled Shaver for the paranasal sinus surgery was proven in an initial study. Deficits showed up in the conversion of the planed cavity. Goal of this study is (1) the development and evaluation of a FESS demonstrator for the investigations to the surgical accuracy and (2) the evaluation of the resulting surgical accuracy for registration and conversion of the work space with an improved rigidity of the Shaver and a completely revised study design.As a demonstrator for the navigate-controlled resection of a volume through the Shaver a two-piece plastic head with an anatomical head and soft tissue model was designed. The investigation of the surgical accuracy takes place with 417 measurements to 4 different fiducial markers on the demonstrator head. The measurements for the deviation of the resulting cavity from the planned volume was realised with a work space by 24 x 24 x 30 mm. The 5 walls of the cavity were seized with 80 measuring points for each level and thus altogether 2000 measured values (5 models x 5 levels x 200 points).The described demonstrator showed itself suitable for the close-to-application attempts to the surgical accuracy. The maximum deviation A (max) indicated position of the Shaver from the reference value amounted to 1,93 mm. The maximum average value of the exceeding of a planned cavity amounts to 1,62 mm.Based on these results a virtual safety passage of 2.00 mm is sufficient. The study refers the clinical serviceability of the navigate-controlled Shaver in paranasal sinus surgery.