Active clinical trials for "May-Thurner Syndrome"

Multi-detector computer tomography protocol project: Chest imaging technique and case presentation.

To assess the role of IVUS in Providing diagnostic important data as: luminal diameters, cross-sectional area, assessment of potential thrombus volume which enables optimal choice of appropriate angioplasty technique, endovascular device guidance, and their impact on procedural technical success and patency rates. comparing diagnostic accuracy of intravascular ultrasound (IVUS) with multiplanar venography and CT venography for iliocaval obstruction.

The aim of this study is to compare intravascular ultrasound with venography in the diagnosis and treatment of iliac vein compression syndrome.

May-Thurner syndrome is the result of compression of the left common iliac vein between the right common iliac artery and overlying vertebrae. In This Study , We will detect the role of color doppler US in the diagnosis of May-Thurner Syndrome in comparison to Direct CT Venography

Determine the sensitivity, specificity and accuracy of vascular ultrasound, using direct and indirect ultrasonographic signs, in the obstructive diseases of iliac venous segment, in patients with advanced chronic venous insufficiency (CEAP 3-6), considering the intravascular ultrasound (IVUS) as the gold standard for this diagnosis. Develop an algorithm for noninvasive ultrasound investigation of obstructive lesions in the iliac segment in patients with advanced chronic venous insufficiency (CEAP 3-6).

Iliac vein compression is a common cause of leg or abdominal complaints and is difficult to diagnose. Although a combination of duplex ultrasonography, magnetic resonance venography and two-plane phlebography are able to show compression, not all suspected iliac vein compressions can be identified. Intravascular ultrasound appears to have a higher diagnostic value, but is far more expensive. In our experience a balloon occlusion test in the common iliac vein during phlebography can diagnose iliac vein compression due to the collateral network that is visualised. The general consensus is that pelvic collaterals are a sign of pathology, though the investigators would like to validate this test by showing that a balloon occlusion test in healthy subjects does not identify a collateral network.