Comparative Study of Degradation Behavior of Bioresorbable Cardiovascular Scaffolds.

This comparative study investigated the biodegradation behavior and mechanism of bioresorbable cardiovascular scaffolds using bench testing under physiological conditions and in vivo experiment. The results show that the molecular weight of the scaffold decreased with respect to time after implantation in both in vivo and in vitro tests. It was found that the molecular weights of the implanted scaffolds in the in vivo and in vitro models decreased to 61.

Degradation model of bioabsorbable cardiovascular stents.

This study established a numerical model to investigate the degradation mechanism and behavior of bioabsorbable cardiovascular stents. In order to generate the constitutive degradation material model, the degradation characteristics were characterized with user-defined field variables. The radial strength bench test and analysis were used to verify the material model.

[Numerical simulation of the multi-dimensional phase-change problem in cryosurgery].

The phase change process in cryosurgery is simulated here with finite element scheme. The calculated results are consistent with experimental results. The compared results confirm the feasibility of the enthalpy model and finite element simulation method.