Real-Time Monitoring of Endoleak in Abdominal Aortic Aneurysm Stent Implants Using Flexible Coplanar Capacitor Sensors

One of the treatment methods for abdominal aortic aneurysms is stent implantation. However, within five years post-procedure, there is a potential risk of recurrence due to endoleak. These leaks do not present characteristic symptoms upon onset, making it necessary to detect their occurrence solely through imaging techniques such as CT or MRI. This necessitates regular follow-up visits, imposing a significant burden on patients. To overcome the temporal and spatial limitations that hinder effective patient risk monitoring, real-time detection technology is crucial. We propose a non-invasive, flexible sensor capable of detecting Type I endoleak, which poses the highest risk. This serpentine-shaped coplanar capacitor sensor is designed to be attached to the exterior surface of the stent, continuously monitoring blood leakage. Fabricated with microscale thickness, this sensor does not impede vascular movement and can wirelessly provide real-time data on the location and extent of leaks. By overcoming major challenges associated with the transfer of flexible electrodes, the sensor maintains consistent performance even after repeated cycles of expansion and contraction. This technology enables real-time monitoring of the patient's condition, allowing for timely intervention. Consequently, it significantly improves treatment outcomes for patients with aortic aneurysms and reduces the complications that can arise post-procedure. The sensor represents a breakthrough in the management and treatment of aortic aneurysms, providing a means to minimize risks and enhance patient care through advanced monitoring capabilities.