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Cardiovascular system
Published in A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha, Clark’s Procedures in Diagnostic Imaging: A System-Based Approach, 2020
A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha
The most common indication for ultrasound of the arterial supply to the upper limb is probably for suspected thoracic outlet syndrome (TOS), to distinguish between neurogenic and vascular causes of TOS. The subclavian artery should be scanned to check for compression by muscle hypertrophy or an accessory rib.
Effects of electro-osmotic and double diffusion on nano-blood flow through stenosis and aneurysm of the subclavian artery: numerical simulation
Published in Waves in Random and Complex Media, 2022
A. M. A. Moawad, A. M. Abdel-Wahab, Kh. S. Mekheimer, Khalid K. Ali, N. S. Sweed
Stenosis and aneurysm regions at maximum height for various vital parameters are provided for the volumetric flow rate as time planes. Owing to the pulsatile nature of flow (an unavoidable consequence of the human heartbeat), the flow rate oscillates with time, as demonstrated in Figure 7. Figure 7(a) is the time plane of volumetric flow rate for some values of which indicated to the volumetric flow rate comes down by raising the Bingham number. Figure 7(b) shown the time plane of volumetric flow rate for different tapered angles at the throat of stenosis and aneurysm of curved artery for converging , normal and diverging arteries. This demonstrates that a non-tapered is also located between the curves of the convergent and divergent tapered for curved arteries. Figure 7(c) illustrated the effect of curvature parameter of artery through the time plane of volumetric flow rate. The volumetric flow rate increases as the electro-osmotic velocity is increased, as shown in Figure 7(d). The subclavian-vertebral artery steal syndrome (SSS) is the hemodynamic phenomenon of blood flow reversal in the vertebral artery due to significant stenosis or occlusion of the proximal subclavian artery or the innominate artery. Figure 7(e) analysis this phenomenon and investigated the time plane of flow rate at maximum height of both stenosis and aneurysm. In Figure 8, for several values of and , the volumetric flow rate is obtained by plotting against the -axis.