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Monika Engelke, Karl Ernst Grund, Dieter Schilling, Ulrike Beilenhoff, Ferdinand Stebner, Christiane Kugler

• \(\bf Introduction:\) The acquisition of sensorimotor skills, so-called "technical skills", plays an essential part in the professional and continuing educational training of medical and nursing staff. Facilities turn to simulator training to promote the safe and accurate performance of endoscopic examinations. Thus, this study aimed to develop and pilot-test a corresponding assessment instrument to monitor necessary sensorimotor or "technical" skills of the examiner for a safe percutaneous endoscopic gastrostomy (AS-PEG). \(\textbf {Materials and Methods:}\) Instrument development and pilot validation involved four stages: identification of potential items and initial draft of the AS-PEG; expert panel with 11 experts (content validity index [CVI] calculated); empirical validation using a quasi-experimental intervention on simulators; revision of the pilot AS-PEG taking expert assessment, and empirical testing into consideration. \(\bf Results:\) The initial instrument yielded 13 categories and 44 items describing the PEG procedure. Experts rated 30 out of 44 items (68%) extremely or very important for the safety of the puncture of the stomach. Initial item-CVIs ranged from 0.00 to 1.00; scale-CVI was 0.61. Twenty-four trainees (7 physicians, 17 nurses) participated in the pilot simulation study. On average, 8:25 min were required for PEG placement (min–max 5:59–13:38 min, SD = 1:43). The revised AS-PEG version was reduced to 14 items with a range of the item CVI from 0.8 to 1.0, and a scale-CVI of 0.90. \(\bf Conclusion:\) The AS-PEG instrument facilitates the evaluation of sensorimotor skills during percutaneous gastric puncture procedures within the context of PEG placement, across professions and without relating to the number of procedures previously performed. The instrument is economical and shows satisfying content validity.