Evaluation of the Pressure and Wall Shear Stress on the Aneurysm Wall According to the Growth Position of a Femoral Artery Pseudoaneurysm by Numerical Analysis

Öz

Bu çalışmada femoral arter psödoanevrizmasında (β) boyun bölgesi ile anevrizma bölgesi arasındaki açı değişiminin anevrizma duvarındaki basınç ve kayma gerilmelerine etkisi hesaplamalı akışkanlar dinamiği (HAD) yöntemi ile araştırıldı. CFD yöntemi, kan akışının yönünü ve hızını gözlemlemede önemli bir araçtır. Sayısal analiz sonuçları ile anevrizmanın büyüme hızı ve rüptür riskinin değerlendirilmesi amaçlandı. Femoral arter ile anevrizma boyun bölgesi arasındaki açının belirli bir değeri (α=45˚) için β açısının 0˚ ile 15˚ arasında değişmesi sonucu elde edilen bulgular, anevrizma içindeki hız vektörlerini içeren grafiklerde sunuldu, anevrizma duvarındaki basınç ve duvar kayma gerilmeleri. Tüm analiz sonuçları değerlendirildiğinde femoral arterde oluşan psödoanevrizma için en yüksek büyüme hızı ve rüptür riskinin β =0˚ açısında olabileceği anlaşıldı. Elde edilen bulguların femoral arter psödoanevrizma tedavisinde tedavi yöntemi ve süresinin belirlenmesinde faydalı olacağı öngörülmüştür.

Anahtar Kelimeler

• Basınç
• psödoanevrizma
• duvar kayma gerilimi.

Evaluation of the Pressure and Wall Shear Stress on the Aneurysm Wall According to the Growth Position of a Femoral Artery Pseudoaneurysm by Numerical Analysis

Abstract

In this study, the effect of the angle change between the neck region and the aneurysm region of a femoral artery pseudoaneurysm (β) on the pressure and shear stresses on the aneurysm wall was investigated with the computational fluid dynamics (CFD) method. The CFD method is an important tool in observing the direction and velocity of blood flow. With the numerical analysis results, it was aimed to evaluate the growth rate and rupture risk of the aneurysm. Findings obtained as a result of the change of β angle between 0˚ and 15˚ for a certain value of the angle between the femoral artery and the aneurysm neck region (α=45˚) were presented in graphs containing velocity vectors inside the aneurysm, pressure, and wall shear stresses on the aneurysm wall. When all the analysis results were evaluated, it was understood that for a pseudoaneurysm formed in the femoral artery, the highest growth rate and risk of rupture could occur at the β =0˚ angle. It was predicted that the obtained findings will be beneficial in determining the treatment method and time in the treatment of femoral artery pseudoaneurysm.

Keywords

• Pressure
• pseudoaneurysm
• wall shear stress
• Pressure, pseudoaneurysm, wall shear stress

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