Compared to axial CT, US is a better approximation of true perpendicular AAA diameter as determined by orthogonal CT. When aortic angulation is greater than 25 degrees axial CT becomes unreliable. However, US measurements are not affected by angulation and agree strongly with orthogonal CT measurements.

Maximal AAA diameter measured with CT is significantly and consistently larger than maximal AAA diameter measured with US. The clinical significance of this difference and its cause remains a subject for further investigation.

Central venous occlusive disease has emerged as a significant clinical problem. Percutaneous venous angioplasty can provide temporary symptomatic relief; however, multiple procedures are often required and long-term relief is rarely achieved.

In comparison with complications that follow percutaneous arteriotomy when PSMC devices are not used for hemostasis: (1) pseudoaneurysms after the use of PSMC devices are larger and do not respond to ultrasound compression, (2) complications associated with PSMC devices result in more blood loss and increased need for transfusion and are more likely to require extensive operative procedures, and (3) arterial infections after the use of PSMC devices are more common and require aggressive surgical management.

The interobserver agreement in planning EVAR is significantly better with MMS CT compared with traditional axial CT. The routine use of MMS CT appears justified before EVAR to improve the accuracy and consistency of patient selection.