ARRT Vascular Interventional Practice Exam

The correct answer is a catheter, which is specifically designed to facilitate the administration of a bolus of contrast medium during angiographic procedures. Catheters are flexible tubes that can be precisely maneuvered through the vascular system, allowing for the targeted delivery of contrast agents to specific areas of interest.

In angiography, the use of a catheter is crucial as it provides access to the blood vessels, enabling the contrast medium to highlight structures such as arteries and veins on imaging studies. This enhanced visibility helps healthcare practitioners assess the condition of the vascular system, identify blockages, or guide further treatment.

Other devices listed may serve various purposes in medical settings, but they do not specifically serve the role of delivering contrast in angiography. A port is typically used for long-term access to a vein for medication delivery, a stent is a support device placed in blood vessels to keep them open, and a line refers to intravenous lines that can administer fluids or medications but are not specialized for contrast delivery during imaging.