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Effects of Different Degrees of Extraluminal Compression on Hemodynamics in a Prominent Transverse-Sigmoid Sinus Junction.
- Source :
- Frontiers in Human Neuroscience; 2/16/2022, Vol. 15, p1-7, 7p
- Publication Year :
- 2022
-
Abstract
- Objectives: To simulate hemodynamic changes after extraluminal compression in pulsatile tinnitus (PT) patients with a prominent transverse-sigmoid sinus junction (PTSJ). Methods: One patient-specific case was reconstructed based on computed tomography venography (CTV) images of a PT patient. The compression degree served as a new index in this study. Cases with 10, 20, 30, 40, 50, 60, 70, 80, and 90% of the compression degree of the control subject were constructed. Steady-state computational fluid dynamics (CFD) were assessed. The wall pressure distribution, wall maximum pressure (P<subscript> max </subscript>) and flow pattern (velocity streamlines and velocity vector) of the PTSJ were calculated to evaluate hemodynamic differences among all cases. Results: With increasing compression, the wall pressure at the compression point and downstream of the PTSJ decreased but increased upstream. When the compression degree exceeded 70%, the upstream pressure increased significantly. Above 50% compression, the blood flow pattern downstream of the sigmoid sinus tended to spiral, especially after 80% compression. Beyond 60% compression, the blood flow pattern under the compression axis became more medial. Conclusion: Mechanical compression of PTSJ changes wall pressure and blood flow patterns. The degree of compression should be carefully observed to avoid possible complications or reoccurrence. [ABSTRACT FROM AUTHOR]
- Subjects :
- COMPUTATIONAL fluid dynamics
HEMODYNAMICS
BLOOD flow
CRANIAL sinuses
BLOOD pressure
Subjects
Details
- Language :
- English
- ISSN :
- 16625161
- Volume :
- 15
- Database :
- Complementary Index
- Journal :
- Frontiers in Human Neuroscience
- Publication Type :
- Academic Journal
- Accession number :
- 155314975
- Full Text :
- https://doi.org/10.3389/fnhum.2022.823455