Experimental investigations of the steady flow through an idealized model of a femoral artery bypass

Abstract

The present paper presents the steps taken by the authors in the first stage of an experimental program within a larger national research project whose objective is to characterize the flow through a femoral artery bypass with a view to finding solutions for its optimization. The objective of the stage is to investigate by means of the PIV method the stationary flow through a bypass model with an idealized geometry. A bypass assembly which reunites the idealized geometry models of the proximal and distal anastomoses, and which respects the lengths of a femoral artery bypass was constructed on the basis of data for a real patient provided by medical investigations. With the aim of testing the model and the established experimental set-up with regard to their suitability for the assessment of the velocity field associated to the steady flow through the bypass, three zones that can restore the whole distal anastomosis were PIV investigated. The measurements were taken in the conditions of maintained inflow at the bypass entry of 0.9 l / min (Re = 600). The article presents comparatively the flow spectra and the velocity fields for each zone obtained in two situations: with the femoral artery completely occluded and completely open.

Analysis of Hemodynamic Effect on Different Stent Strut Configuration in Femoral Popliteal Artery during the Physical and Physiological Conditions

“…In this study, the validation was carried out by validating the streamline of flow velocity in Femoral artery between the present numerical and experimental data by Giurgea et al, [17]. The location of the streamline was taken in the same location.…”

Functional and Metrological Issues in Arterial Simulators for Biomedical Testing Applications: A Review

“…Other studies [52,53] used the PIV method for flow behavior analysis in vessels and grafts, therefore suggesting that this is an accurate and validated method for the measurement of flow velocity and visualization of fluid flow. Despite this advantage, Giurgea et al [53] recognized that PIV methods suffer from the mandatory matching between the phantom and the fluid refractive indices, which is hard to achieve because of the limitations in the manufacturing process, especially of curved vessel walls. A summary of the main sensors, metrological issues and measured quantities in the arterial simulators developed and realized according to above flow studies is reported in Table 4.…”

“…In the current state-of-the-art research, the main works regarding experimental set-ups for arterial simulation investigated blood flow behavior in artery bifurcations [23][24][25][26][27][28], or in the presence of stenosis and plaques [29][30][31][32][33][34][35][36][37]. Other authors designed and developed arterial simulators with the goal of experimentally validating the mathematical models behind the relationships subsisting between flow and pressure, or between flow and geometrical and mechanical characteristics of the artery [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54]. Another important and prolific field of application for arterial simulators is medical device testing, especially in the context of artificial organs, such as ventricular assist devices (mono-or biventricular) and artificial hearts (through centrifugal blood pumps).…”