应用光学追踪和力传感技术分析吸脂针运动与吸脂效率的关系

Objective This study aims to discuss the detection effect of a novel liposuction cannula movement recording system based on optical tracking technique and force sensor during liposuction and analyze the relationship between recorded data and liposuction efficiency. Methods The patients who met inclusion criteria 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 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 during experiment. The average amplitude, average frequency, and average forward resistance of the liposuction needle movement of the two surgeons were compared, and the liposuction efficiency was calculated and compared. The data were analyzed by paired t-test and signed rank sum test. Results Eighteen patients were enrolled. All patients were females at 23-49 years old,with the mean age of 37 years old. Liposuction was performed in the abdomen, thighs, and waist. The movement amplitude and forward resistance of the liposuction cannula of surgeon A were (11. 43±1. 23) cm and (9. 35±2. 24) N, which were higher than those of surgeon B (10. 00± 2. 33) cm and (8. 20± 3. 05) N, and the differences were significant (t = 2. 780, P = 0. 013; t = 2. 328, P = 0. 033). The frequency of liposuction cannula movement of surgeon A was (2. 14±0. 19) Hz, and that of surgeon B was (2. 19±0. 55) Hz. There was no significant difference between the two surgeons (t = -0. 366, P = 0. 719). The liposuction efficiency of operator A was (19. 20± 9. 36) ml / min, and the efficiency of operator B was (15. 27±8. 05) ml / min. A was 3. 93 ml / min higher than B. The difference was statistically significant (t = 3. 736, P = 0. 002). Conclusions The liposuction cannula movement recording system based on optical tracking and force sensing technology established in this study can record and analyze the operation trajectory and resistance of the liposuction cannula. When the movement amplitude and forward resistance of the cannula are larger, the liposuction efficiency is higher.