Augmented Reality (AR) is the most recent and widely used technology in a variety of industries, including tourism, the arts, business, industrial manufacture and restoration, education and healthcare. Development of AR is important for students to practice and improve the skills of stent placement to prevent the risk of artery rupture during actual procedure. Therefore, the study aims to develop a multi-user interaction in collaborative AR interface blood flow simulation in coronary artery where students can learn about the blood flow simulation and practice the stent placement together with lecturer. This work aims to study the related requirements for blood flow simulation in aneurysm blood vessels, to propose an AR-based solution that could help students to practice the stent placement using collaborative AR platform and to evaluate the functionality and usability of the proposed solution. The proposed solution uses multiple markers and touch screen inputs with UI buttons as tools to do the stent placement. The methodology of this study has four stages; analysis, design, implementation and evaluation. The multi-user interaction and collaborative AR interface have been implemented during implementation phase. This study has been evaluated by 20 users from biomedical engineering background using the System Usability Scale (SUS) and the mean SUS score is 70.875, which above the average system usability that shows the system is acceptable. The significance of this study is to help biomedical students to build confidence and proficiency in stent placement, ultimately enhancing their preparedness for real-life clinical situations.