Evolution of novel grinding tool in removing coronary artery calcification tissue process.

Coronary rotational atherectomy (CRA) means of use a tiny grinding tool to rotate at high speed in the blood vessels, so as to remove calcified tissue, effectively enlarge the inner diameter of the vessels, which is an important tool for the treatment of cardiovascular calcified blockage. However, excessive grinding force, temperature and debris size can lead to serious surgical complications and endanger the patient life during CRA. This study introduces the design, fabrication and performance verification process of a novel grinding tool, and investigates the influence of tool geometrical parameters and grinding parameters The experimental results showed that: the novel grinding tool can effectively remove the simulated calcified tissue by grinding. The geometrical size of tools plays an important effect on the grinding properties, which can result in increasing grinding force, temperature and debris size with the increase of tool diameters. In addition, with the increase of rotational speed, the grinding force and temperature increase gradually, while the debris size decreases as the rotational speed increases. The increasing inner diameter of bone can also lead to a decrease in grinding force and temperature slightly. All the obtained results can give effective guidance for clinical operations.