Impact of stent porosity on hemodynamics in simulated sigmoid sinus diverticulum
10.13929/j.1672-8475.201811059
- Author:
Kailan YANG
1
Author Information
1. Department of Interventional Radiology, Beijing Friendship Hospital, Capital Medical University
- Publication Type:Journal Article
- Keywords:
Cranial sinuses;
Diverticulum;
Hemodynamics;
Interventional therapy;
Stents;
Tinnitus
- From:
Chinese Journal of Interventional Imaging and Therapy
2019;16(10):630-634
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To investigate the impact of stent porosity on hemodynamics in the simulated sigmoid sinus diverticulum. Methods: An idealized hemodynamic model of sigmoid sinus diverticulum (S0 model, no stent) was constructed based on computational fluid dynamics (CFD). The hemodynamic changes in models stented with different porosities of 75%, 50% and 25% (corresponding to S1, S2, S3 model) were observed. Results: The mean flow velocities in sigmoid sinus diverticulum of model S0, S1, S2 and S3 was 12.65, 4.68, 2.20 and 0.41 mm/s, respectively. Compared with model S0, the velocities in model S1, S2 and S3 decreased by 63.00%(7.97/12.65), 82.61%(10.45/12.65) and 96.76%(12.24/12.65), respectively. The area of high pressure and high wall shear stress (WSS) in diverticulum distal wall reduced gradually with the decrease of stent porosity. Meanwhile, the pressure and WSS tended to distribute uniformly in the entire diverticulum. However, the mean pressures for model S0, S1, S2 and S3 in diverticulum (64.04, 63.86, 62.54 and 60.95 Pa, respectively) showed no significant change. Conclusion: Stent with lower porosity can significantly improve blood flow and hemodynamic stress conditions in the simulated sigmoid sinus diverticulum.
