Antegrade femoral cannulation involves placing the cannula at which location and orientation?

• A. 2 cm below inguinal ligament, at least 1 cm above CFA bifurcation; patient usually flipped on table
• B. 2 cm above inguinal ligament; patient upright
• C. At CFA bifurcation; patient in lateral decubitus
• D. 2 cm below CFA bifurcation; patient prone

Answer: (A)

In antegrade femoral cannulation you want to access the common femoral artery in a segment where you can advance the catheter toward the heart with a smooth, relatively straight path. This is achieved by puncturing about 2 cm below the inguinal ligament, placing the entry just above the bifurcation of the common femoral artery. Staying at least 1 cm above the bifurcation ensures you’re in the CFA rather than the superficial femoral or profunda branches, reducing the risk of entering a smaller branch or causing a dissection.

The orientation matters because the catheter should be directed cephalad (toward the aorta). Positioning the patient appropriately, often flipping them on the table, aligns the CFA with the catheter’s trajectory, facilitating forward advancement with minimal acute angles.

Thus, this site and position optimize stability and safety for advancing the cannula antegrade toward the central circulation.