The Application Research On Liposuction Surgical Skills Based On Motion And Force Information

BackgoundLiposuction is one of the most performed cosmetic surgery procedures worldwide.With the continuous development of technology and devices,liposuction has become a safe minimally invasive procedure.However,there are still complications and some are even fatal.Plastic surgeons with standardized training and extensive experience are critical to the safety of liposuction.During the procedure,the well-trained and experienced surgeon guide the cannula to find the appropriate layer of the subcutaneous fat by the sense of their hands.They decide the appropriate numbers of strokes of cannula movements and maintain soft operation by their experience.However,the liposuction procedures performed by inadequately trained surgeons or inexperienced surgeons may cause iatrogenic liposuction complications.However,as liposuction is a minimally invasive surgery with a small incision,the surgeon performs the procedure under blind vision,and the surgeons' operation space is very narrow.Thus,there is no effective method to record and measure the surgical operation of the surgeon.At the same time,the direction and strength of the liposuction cannula movement depend on the sense of the surgeon,which is difficult to describe and convey.Therefore,there is no relevant literature report on the objective evaluation of liposuction surgery skills,and there is a lack of corresponding objective evaluation standards.ObjectiveIn the present study,a novel research method based on motion information and force information of liposuction 'cannula were established.The aim of the study is to explore the application of this research method in the research of surgical skills,liposuction surgical training,and liposuction surgical robots.This study established a foundation for the objective evaluation criteria of the surgical skills of liposuction.The experiment is carried out from the following aspects:1.To Establish a research method of surgical operation of liposuction by building up a liposuction recording system based on motion information and force information.2.To analyze effects of liposuction cannula movement parameters on liposuction efficiency by collecting clinical data during liposuction.3.To build up a liposuction simulation training system based on motion information and force information and to evaluate the effectiveness of the system in training medical students.Method1.Eighteen female patients who underwent liposuction from January 2019 to September 2019 were enrolled in this study and operated on by two surgeons with extensive liposuction experience.During a given procedure,one surgeon performed liposuction on only one side of the targeted liposuction area.Another surgeon performed liposuction on the contralateral side.The trajectory and force of liposuction cannula were recorded for approximately 300 seconds,and the volume of upper layer fat in liposuction aspirate was measured to evaluate liposuction efficiencies with the parameter of the cannula movement.2.Thirty medical postgraduates without liposuction experience were selected.All the participants were equally divided into two groups.In the traditional training group,the trainees are trained on the phantom,while the teachers give explanations and demonstrations.In the simulation training system group,the trainees are trained by themselves on the simulation training system.Before the training started and after the training,the two groups were required to perform a liposuction simulation test on the simulated training system.The resistance of liposuction cannula,the acceleration of liposuction cannula and the uniformity degree of operation of the two groups were recorded,and the differences in the training effects between the two groups were compared.Result1.The liposuction efficiency of surgeon A was 19.20 ml/min,and the liposuction efficiency of surgeon B was 15.27 ml/min.The results showed significant differences in liposuction efficiency(P<0.05).The average amplitude of cannula movement was 11.43cm and 10.00cm,there were significant differences(P<0.05).The average frequency of cannula movement was 2.14 Hz and 2.19 Hz and the results were not significant different.The average forward resistance of cannula movement was 9.35 N and 8.20 N,which had significant differences(P<0.05).The average lateral resistance of cannula movement was 5.64 N and 5.53 N,which had no significant differences.2.After training,the resistance evaluation and acceleration evaluation of the trainees in the simulation training system group were significantly improved(P<0.05).In the evaluation of the degree liposuction uniformity,the angle of liposuction coverage of the simulation training system group was significantly expanded(P<0.05).The surgical area was more evenly and centrally distributed in the two groups(P<0.05).Conclusion1.The liposuction recording system based on motion information and mechanical information established in this study provided an innovative research method for recording and analyzing liposuction operation.The cannula movement of large operation amplitude and greater forward force contributed to higher liposuction efficiency.2.The liposuction simulation training system established in this study was an effective way to assess the surgical skills of liposuction.The applications of the liposuction simulation training system could effectively improve the surgical skills of the trainees.Compared with the traditional model of liposuction teaching,the liposuction simulation training system had the characteristics of real-time feedback and intuitive data,which enhanced the trainee's understanding of cannula movement and the sense of operating force.It also effectively improved the erroneous actions that can be monitored by motion information and force information.