Zusammenfassung
GRUNDLAGEN: Wir untersuchten den Effekt des "virtual reality (VR) laparoscopy simulator (LapSim®)" auf die Lernkurve bei laparoskopischer Chirurgie. METHODIK: 14 Medizinstudenten wurden für "clip application" randomisiert. Gruppe A (n = 7) niedriger Schwierigkeitsgrad, Gruppe B (n = 7) hoher Schwierigkeitsgrad. Beide Gruppen wurden nach 2 Monaten wieder getestet, entsprechend dem Schwierigkeitsgrad. Bei jedem Training am Simulator musste die Übung 10× wiederholt werden. ERGEBNISSE: Beide Gruppen verbesserten sich im Vergleich zur ersten Trainingseinheit. Gruppe A hat das 2 Training schneller und blutärmer beendet als Gruppe B. Lernkurven-Plateau war in Gruppe A nach 6 Wiederholungen erreicht, solches war bei Gruppe B nicht zu beobachten. SCHLUSSFOLGERUNGEN: Die Lernkurve scheint eher von der Schwierigkeit der Übung als von der Anzahl der Wiederholungen abhängig zu sein.
Summary
BACKGROUND: The aim of this study was to determine the influence of different training levels with increasing complexity on the learning curve of a virtual reality (VR) laparoscopy simulator (LapSim®). Furthermore, this study was designed to identify reacquisition of performance in medical students. METHODS: 14 medical students in their final year without previous laparoscopic experience were randomized into two groups, both of which performed the "clip application" task. Group A (n = 7) had parameter adjusted to an easy level of performance, while group B (n = 7) was adjusted to a difficult level. Both groups were tested again at their respective level two months later. During both training sessions, each participant had to repeat the task ten times consecutively. RESULTS: Both groups had improved parameter of performance when tested again after two months. Group A completed the second training session significantly faster than Group B and with less loss of blood. Parameter of performance plateaued in group A by the 6th repetition. However, such stable plateau was not reached in group B. CONCLUSIONS: This result suggests that steepness and plateau of a learning curve may be more dependent on the level of performance required by the particular training session rather than the number of repetitions during a session.
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Schlosser, K., Alkhawaga, M., Maschuw, K. et al. Training of laparoscopic skills with virtual reality simulator: a critical reappraisal of the learning curve. Eur Surg 39, 180–184 (2007). https://doi.org/10.1007/s10353-006-0292-2
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DOI: https://doi.org/10.1007/s10353-006-0292-2