Fig. 2

Operation performances for trainers in eight time sessions are shown; surgeons performed better after repeated training (the “fail” marking in the figure indicates a failed surgery due to a serious hepatic artery wall tear). A The operation time curve for the four trainers in the eight time trainings. B Blood loss curve for the four trainers in the eight time trainings. C Goal score curve for the four trainers in the eight time trainings. D Repair score histogram for the four trainers in the eight time trainings. E Narrow score histogram for the four trainers in the eight time trainings