The aim of this article is to investigate the blood flow in bifurcated artery with mild stenosis taking blood as a micropolar fluid. The arteries forming bifurcation are taken to be symmetric and straight cylinders of finite length. The governing equations are non-dimensionalized, and coordinate transformation is used to convert the irregular boundary to a regular boundary. The resulting system...

A non-Newtonian mathematical model of blood described as a Hershel-Bulkley fluid flowing in stenosed artery with the effect chemical reaction is mathematically studied. The expressions shear stress, mean velocity and absolute plug non-plug flow field are evaluated analytically. convective-diffusion equation solved using Taylor-Aris technique subject to relevant boundary constraint determining c...

A numerical simulation to investigate the Non-Newtonian modeling effects on physiological flows in a three dimensional idealized artery with a single stenosis of 85% severity is given. The wall vessel is considered to be rigid. Oscillatory physiological and parabolic velocity profile has been imposed for inlet boundary condition. Determination of the physiological waveform is performed using a ...

The effect of slip boundary conditions on the blood flow taking blood as a Casson fluid has been studied. It is observed that axial velocity, volumetric flow rate and pressure gradient decrease along the radial distance as the slip length increases but the wall shear stress increases with increase in slip length. All the results derived are presented analytically and graphically by selecting su...

A continuous murmur like that of a persistent ductus arteriosus produced by a stenosed branch of a pulmonary artery with a post-stenotic dilatation is presented in the following case. Other abnormalities included a hypoplastic left lung, atrial septal defect, ventricular septal defect, and an absent left pulmonary artery. The literature on congenital heart disease contains increasing numbers of...

The flow of blood through a stenosed catheterized artery has been studied. To observe the effects of hematocrit, blood has been represented by a two-phase macroscopic model (i.e., a suspension of red cells in plasma). It is found that for any given catheter size, the impedance increases with hematocrit and also for a given hematocrit, the same increases with the catheter size. In the stenotic r...

We report herein the case of a 23 year old woman who was referred to Mulago National Referral and Faculty of Medicine Makerere University Teaching Hospital because of sudden collapse, left sided weakness and headache for management. The patient underwent a battery of investigations but died five days after admission. The post mortem findings were extensive infarction the right cerebrum extendin...

Coronary stent fractures have been suggested as a potential new mechanism of restenosis. The mechanical properties of stents were designed not only to prevent vessel recoil, but also to resist the mechanical stress of vessel movement over millions of cardiac cycles. We present a case in which mechanical stress may have contributed to the fracture of a stent implanted in a saphenous vein graft (...