数字图像相关法的皮瓣减张缝合方法研究
Study on digital image correlation method of skin flap suture reduction
Received:June 27, 2023  Revised:August 09, 2023
DOI:10.7520/1001-4888-23-132
中文关键词:  皮瓣缝合  数字图像相关法  仿生皮肤材料  生物力学  缝合应力
英文关键词:flap suture  digital image correlation  artificial skin material  biomechanics  suture strain
基金项目:国家自然科学基金项目(52175234, 51105175); 江苏省“六大人才高峰”资助项目(JXQC-006)
Author NameAffiliation
LI Huabin School of Mechanical Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China 
JI Xiaogang* 1.School of Mechanical Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
2.Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology, Wuxi 214122, Jiangsu, China 
SUN Rong School of Mechanical Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China 
WEN Guangquan School of Mechanical Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China 
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中文摘要:
      为研究不同局部皮瓣缝合方式对皮瓣缝合应变的影响,确定局部皮瓣缝合最佳方案,开展了仿生皮肤缝合大变形场的实验测量与表征技术研究。首先,搭建非接触全场应变测量系统,获取准静态单轴拉伸实验下仿生皮肤材料的超弹性本构关系;然后,通过数字图像相关系统进行仿生皮肤缝合实验,研究旋转、推进和换位3种缝合方式对伤口缝合后皮瓣缝合力的影响,获取皮瓣缝合后的位移场和应变场,分析了缝合线附近应变集中效应;最后,基于仿生皮肤材料Mooney-Rivlin超弹性本构关系,定量求解皮瓣缝合区Von Mises等效应力。结果表明,3种皮瓣缝合方式中旋转式缝合展现出最好的缝合性能,缝合区最大应力最小,且随着伤口直径增大,最大应力减小;皮瓣缝合后应力集中在伤口缝合线附近。本文还进一步讨论了缝合张力对伤口缝线周边区域应变集中的影响,研究结果可为局部皮瓣整形缝合术前减张方案提供参考依据。
英文摘要:
      To study the influence of different local skin flap suture methods on the strain of skin flap suture and determine the best scheme of local skin flap suture, the experimental measurement and characterization technology of bionic skin suture large deformation field were studied. Firstly, a non-contact full-field strain measurement system was established to characterize the hyperelastic constitutive relationship of bionic skin materials under quasi-static uniaxial tensile test. Then combined with digital image correlation system, bionic skin suture experiment was carried out. The effects of rotation, propulsion and transposition on the suture force of the skin flap after wound suture were studied. The displacement field and strain field of the skin flap after suture were obtained, and the strain concentration effect near the suture line was analyzed. Finally, the Von Mises equivalent stress in the suture area of skin flap was quantitatively solved based on the Mooney-Rivlin hyperelastic constitutive model of bionic skin material. The results show that rotation suture delivers the best performance among the three methods of skin flap suture, and the maximum stress in the suture area is the lowest, and the maximum stress decreases with the increase of the wound diameter. The stress concentration of skin flap suture mainly appears near the wound suture line. This paper further discusses the effect of suture tension on strain concentration in the peripheral area of wound suture, and the results of this study can provide a reference for reducing the tension of local skin flap before plastic suture.
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