Task: Answer Verification
Input (English): Question: Is a sheathless retrograde approach via the popliteal artery useful and safe for treating chronic total occlusions in the superficial femoral artery?
Answer: Based on this retrospective analysis, the use of a microcatheter for SFA CTO retrograde access appears to be superior to 4-F or 6-F sheaths in terms of shorter time to hemostasis and fewer complications.
Output (English): yes