What is the primary purpose of digital subtraction angiography during peripheral interventions?

• A. Provide a road map of blood vessels to guide intervention
• B. Measure systemic blood pressure
• C. Assess ventricular function
• D. Visualize nerves

Answer: (A)

Digital subtraction angiography is used during peripheral interventions to create a clear map of the arterial tree by subtracting nonvascular structures after contrast is injected. This road map shows the course of the vessels, helping the operator navigate to the target lesion, plan catheter paths, and guide device delivery with precision. It also allows immediate visualization of the treated segment to assess results and ensure patency. Measuring systemic blood pressure, evaluating ventricular function, or visualizing nerves aren’t the primary roles of DSA in this setting, as those functions are served by other tools or imaging methods.