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Investigating external compression as prevention of fainting incidences during upright weight-bearing MRI scans by measuring the deep veins of the legs

IJperlaan, S.A. (2020) Investigating external compression as prevention of fainting incidences during upright weight-bearing MRI scans by measuring the deep veins of the legs.

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Abstract:With the weight-bearing MRI, patients can be positioned in the upright position, to image gravity-dependent problems. One drawback is that fainting incidences occur due to inactivity of the lower leg muscles. Using a leg compression pump decreases fainting incidences. Nevertheless, an alternative method is desired. Compression stockings are considered to have the same effect as the fluctuating compression on these veins. US is used to measure the cross-sectional area and the blood velocity of the deep veins. Two measuring methods to investigate why fainting occurs, what the effect is on the veins due to compression, and if the constant compression can achieve the same effect as the fluctuating compression. The first method focuses on the change in the cross-sectional area of the posterior tibial vein (PTV) in the calf. The second method focuses on the change in blood velocity in the common femoral vein (CFV) in the groin. The effect of the upright position, which causes a fainting incident, on the deep veins is still unclear. When compression increases, the blood velocity also increases. When compression is constant, the blood velocity is also constant. Therefore, constant compression cannot achieve the same effect as the fluctuating compression.
Item Type:Essay (Master)
Faculty:TNW: Science and Technology
Programme:Biomedical Engineering MSc (66226)
Link to this item:http://purl.utwente.nl/essays/81060
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