Question:medium
Which of the following is the best stent material for a femoropopliteal bypass intervention?
Which of the following is the best stent material for a femoropopliteal bypass intervention?
Show Hint
Think covered self-expanding nitinol with a microporous polymer cover.
Updated On: Jun 24, 2026
- Dacron
- Reversed saphenous vein
- PTFE
- None
Show Solution
The Correct Option is C
Solution and Explanation
Step 1: Define the anatomical challenge. Blood vessels behind the thigh and knee bend and compress with every step, so any device placed there must survive constant mechanical stress.
Step 2: Identify the right stent. The device of choice is a $PTFE$-covered self-expanding nitinol stent. Its covering carries pores of about 30 to 100 microns, which let the inner surface develop an endothelial lining and promote healing.
Step 3: Justify nitinol. Nitinol is a flexible shape-memory alloy, and only self-expanding covered nitinol stents are recommended for the femoropopliteal region precisely because of this durability under repeated flexion.
Step 4: Exclude the others. Dacron suits big central vascular grafts, and reversed saphenous vein is a venous bypass conduit rather than a stent, so neither fits a stenting question.
\[\boxed{\text{PTFE}}\]
Step 2: Identify the right stent. The device of choice is a $PTFE$-covered self-expanding nitinol stent. Its covering carries pores of about 30 to 100 microns, which let the inner surface develop an endothelial lining and promote healing.
Step 3: Justify nitinol. Nitinol is a flexible shape-memory alloy, and only self-expanding covered nitinol stents are recommended for the femoropopliteal region precisely because of this durability under repeated flexion.
Step 4: Exclude the others. Dacron suits big central vascular grafts, and reversed saphenous vein is a venous bypass conduit rather than a stent, so neither fits a stenting question.
\[\boxed{\text{PTFE}}\]
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