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In-vivo measurements of blood flow velocity profiles in canine ilio-femoral anastomotic bypass grafts

In-vivo measurements of blood flow velocity profiles in canine ilio-femoral anastomotic bypass grafts

Authors :
Jones, S.A.
Giddens, D.P.
Loth, F.
Zarins, C.K.
Kajiya, F.
Morita, I.
Hiramatsu, O.
Ogasawara, Y.
Tsujioka, K.
Source :
Journal of Biomechanical Engineering. Feb, 1997, Vol. 119 Issue 1, p30, 9 p.
Publication Year :
1997

Abstract

In-vivo velocity profiles were recorded with a 20 MHz, 80-channel pulsed Doppler ultrasound velocimeter in canine end-to-side ilio-femoral anastomotic grafts. The geometries were obtained from casts of the anastomotic region, and flow rates were measured with electromagnetic flow probes. Three cases reported here include a 'standard' geometry, which was similar to previously studied in vitro models, a stenosed geometry, and a case with below average flow rate. Observed flow features include separation at the hood and toe, movement of the floor stagnation point, and skewed profiles in the proximal outflow segment. Out-of-plane curvature and lateral displacement of the anastomosis inlet appear to have a strong effect on the flow fields. In addition, compliance affects the instantaneous flow rates within the proximal and distal branches.

Details

ISSN :
01480731
Volume :
119
Issue :
1
Database :
Gale General OneFile
Journal :
Journal of Biomechanical Engineering
Publication Type :
Academic Journal
Accession number :
edsgcl.19366610