A novel dynamic mechanical analysis device for in vivo characterization of human skin mechanics

This paper presents a device inspired by Dynamic Mechanical Analysis (DMA) for in vivo characterization and measurement of human skin's mechanical properties. The device addresses existing gaps in skin testing technologies by enabling periodic loading to measure viscoelasticity, overcoming limitations of current devices that focus primarily on static tests. The device employs a voice coil motor and vacuum suction cup probes for precise, continuous tensile testing of skin, offering a novel approach to measure skin independently from subcutaneous tissue. The device's portability and compact design allow for versatile application across various skin regions, making it potentially suitable for medical research, dermatological studies, and early diagnosis of skin diseases. Preliminary validation results indicate that the device can sensitively distinguish the mechanical properties of skin in different regions, indicating possibilities for further investigation into the skin's viscoelasticity and anisotropy, and laying a foundation for progress in the field of in-vivo skin testing.