TY  - EJOU
AU  - Cao, Mengyuan 
AU  - Xu, Yi 
AU  - Dong, Yilin 

TI  - Improving Mechanical Properties of Vitrified Umbilical Arteries with Magnetic Warming
T2  - Fluid Dynamics \& Materials Processing

PY  - 2021
VL  - 17
IS  - 1
SN  - 1555-2578

AB  - The damage caused by thermal stress during rewarming vitrified biosamples is one of the major obstacles for clinical purposes. Magnetic warming is a highly effective approach to overcome this hurdle and can achieve rapid and spatially homogeneous heating. The current research investigates the effects of magnetic warming on the histological and biomechanical properties of the vitrified umbilical arteries (UAs) through experiments and simulation. The results of experiments show that, for the case of magnetic warming comparing with the conventional water bath, magnetic warming presents better preservation of extracellular matrix (ECM), collagen fibers, elastic fibers, and muscle fibers of the umbilical artery. There is no significant difference between magnetothermal and fresh UAs (<i>p</i> > 0.05) in the elastic modulus and the ultimate stress. The theoretical results reveal that the maximum temperature difference  inside the biosample is 1.117 ± 0.649°C, and the maximum thermal stress  is 0.026 ± 0.016 MPa. However, for the case of conventional water bath,  is 32.342 ± 0.967°C and  is 1.453 ± 0.047 MPa. Moreover, we have arrived at the same conclusion by simulation as theoretical calculation have. Therefore, magnetic warming can effectively reduce the thermal stress damage of biological samples during the warming period due to more uniform and rapid warming. These results confirm that magnetothermal can significantly improve the mechanical properties of large size cryopreserved tissues or organs such as UAs.
KW  - Umbilical artery; vitrified; magnetic warming; mechanical properties; thermal stress

DO  - 10.32604/fdmp.2021.011443