How is angiography performed in the workup of diabetic foot ulcers?

Updated: Oct 15, 2020
  • Author: Tanzim Khan, DPM; Chief Editor: Romesh Khardori, MD, PhD, FACP  more...
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Answer

Typically, a catheter is inserted retrograde via a femoral puncture, and contrast is power-injected into the infrarenal aorta. Films are taken as the contrast is followed down to both feet. In certain cases, as with aortic occlusion, a femoral approach to the aorta may not be possible. In this case, the interventionalist (interventional cardiologist, vascular surgeon, or interventional radiologist) may use an alternative entry point, such as via the brachial or axillary artery. The arterial catheter is usually passed through a 5F sheath that is 1.6 mm in diameter. This is a sizable hole in the femoral artery, which may be only 6-10 mm in diameter. After the catheter is removed, gentle pressure must be applied to the puncture site for approximately 30 minutes. In most cases, the physician performing the angiogram may elect to use a small device to aid in closing the puncture site (“closure device”). Successful deployment of these devices eliminates the need for prolonged pressure application.


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