The Influence of Out-of-Plane Geometry on The Flow Within A Distal End-to-Side Anastomosis  

Oleh:

Shah, O. ; Doorly, D. J. ; Peiro, J. ; Papaharilaou, Y. ; Watkins, N. ; Caro, C. G. ; Dumoulin, C. L. ; Sherwin, S. J.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Biomechanical Engineering vol. 122 no. 1 (2000), page 86-95.
Topik: GEOMETRY; out - of - plane geometry; flow; distal end - to - side; anastomosis

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ52.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

This paper describes a computational and experimental investigation of flow in a prototype model geometry of a fully occluded 45 deg distal end - to - side anastomosis. Previous investigations have considered a similar configuration where the centerlines of the bypass and host vessels lie within a plane, thereby producing a plane of symmetrywithin the flow. We have extended these investigations by deforming the bypass vessel out of th eplane of symmetry, thereby breaking the symmetry of the flow and procuding a nonplanar geometry. Experimental data were obtained using magnetic resonance imaging of flow within perspex models and computational data were obtained from simulations using a high - order spectral / hp element method. We found that the non planar three - dimensional flow notably alters the distribution of wall shear stress at the bed of the anastomosis, reducing the peak wall shear stress peak by approximately 10 percent when compared with the planar model. Furthermore, an increase in the absolute flux of velocity into the occluded region, proximal to the anastomosis, of 80 percent was observed in the non planar geometry when compared with the planar geometry.

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