The simulation training program of laparoscopic enteroenteric anastomosis on a 3D- printed model and the effect of left-hand dexterity training on this training

Abstract Background In surgery, most right-handed people don't have enough left-hand dexterity. We would like to utilize a convenient way to improve left-hand dexterity and study whether it could enhance the effectiveness of surgical training. Methods Four residents were randomly divided into two groups. The subjects in the study group were required to use the left-hand computer mouse for 15 minutes every day for 30 days. The hand dexterity of all subjects was tested through the O’Conner Tweezer Dexterity Test and their performance of enteroenteric anastomosis on a specific 3D printed model was recorded and evaluated by Objective Structured Assessment of Technical Skill and Specific Rating Scales every time they train. Results The average time for the left-handed test in the experimental group and control group was from 518.5s to 343s and from 531s to 444.5s respectively. There was a statistically significant difference in left-hand dexterity between the two groups (P=0.015). The average performance score of the experimental group and control group improved from 25.5 to 42 and from 24.5 to 31.5 respectively. There was a statistically significant difference in training performance between the two groups in the 4 th (P=0.014) and 5 th (P=0.008) tests. A figure about left-hand dexterity score and operation performance scores (Learning curve) was made. A table and a figure about the operation details in training were made. Conclusion Regular surgical training on 3D printed models can improve suture performance while improving left-hand dexterity with a left-handed mouse can speed up the process and shorten the learning curve.