抄録
Purpose: Our study investigated the risk of recanalization, from a hemodynamic perspective in six patients with visceral aneurysm embolization using coil packing, occasionally along with combined outflow vessel embolization. Methods: Blood flow simulations were performed using anatomically realistic vessel geometry created from the patient’s computed tomography images. A porous media model that represented flow in the embolized aneurysmal region was employed. Stagnant volume ratio (SVR) was evaluated to quantify the stagnation of flow within the embolized aneurysm. Results: SVR was elevated, with increased packing density (PD), in all patients. In the patient with recanalization, the rate of increase in SVR for PD <20% was smaller than that in the other five other patients, and the SVR for the actual PD was the lowest. In the five patients without recanalization, the SVR for the actual PD was greater than 80% at Reynolds number of 300. Conclusion: Individualized blood flow simulations focusing on SVR would be a useful tool to determine the clinical endpoint, the optimum individualized PD and to optimize postoperative follow-up of visceral aneurysms.
