Zahouani Hassan, Ayadh Meriem, Abellan Marie-Angèle, Bigouret Armelle
Univ Lyon, Ecole Centrale de Lyon, CNRS, ENTPE, LTDS, UMR5513, ENISE, 42023, Saint Etienne, France.
Laboratoires Clarins, 5 Rue Ampère, 95300, Pontoise, France.
Sci Rep. 2024 Dec 30;14(1):31963. doi: 10.1038/s41598-024-83490-5.
Natural skin tension plays an important role during surgical procedures and during the healing process. Existing studies performed ex vivo give only a qualitative map of skin tension. In this study, we propose a quantitative characterization of skin tension in vivo using a new model. This model consists in calculating the tension indices based on the equilibrium equation, and uses the Fourier transform. The study was carried out on 42 volunteers. Tension indices are calculated primarily from skin topology images performed on seven body areas: forearm, thigh, cheek, belly, upper chest, and arm (front and back face). A feasibility study of applying the model to LC-OCT and confocal microscopy images was then carried out. The results show that the skin tension is higher in the family of tension lines, and lower in the family of lines perpendicular to the tension lines. The tension indices quantify the state of the skin tension forces and allow to classify body areas according to their state of tension. With age, the skin loses its tension, leading to an imbalance of tension forces between the two families of lines. The results also show that the model can be used on deep skin images to study fiber tension.
自然皮肤张力在外科手术过程和愈合过程中起着重要作用。现有的体外研究仅给出了皮肤张力的定性图谱。在本研究中，我们提出了一种使用新模型对体内皮肤张力进行定量表征的方法。该模型包括基于平衡方程计算张力指数，并使用傅里叶变换。该研究对42名志愿者进行。张力指数主要从在七个身体部位（前臂、大腿、脸颊、腹部、上胸部以及手臂（正面和背面））拍摄的皮肤拓扑图像中计算得出。随后进行了将该模型应用于LC - OCT和共聚焦显微镜图像的可行性研究。结果表明，在张力线族中皮肤张力较高，而在与张力线垂直的线族中皮肤张力较低。张力指数量化了皮肤张力的状态，并允许根据身体部位的张力状态对其进行分类。随着年龄增长，皮肤失去张力，导致两线族之间的张力失衡。结果还表明，该模型可用于深层皮肤图像以研究纤维张力。
