A Novel Coronary Knobby Scoring Balloon and Mechanical Study of Intravascular Dilation

A novel coronary knobby scoring balloon was used to investigate its dilation process under various vascular conditions using finite element analysis (FEA) and in vitro anti-slippage testing, and compared with other balloons. The FEA results indicated that in the case of healthy artery and diseased artery with different stenosis rates, the stress on the vessels caused by the knobby scoring balloon was significantly smaller than that of the scoring balloon, and was close to that of the plain balloon. In vitro anti-slippage testing showed that the slippage distance of a plain balloon was 0.11 ± 0.06 mm, and there was no slippage for knobby scoring balloon under nominal pressure. Knobby scoring balloon can effectively expand calcified lesion while providing anti-slippage function, and has a lower risk of vascular injury.