Questions you should ask, (1) Is it available ?(2) Am I a candidate ? (3) What if I have reaction(s) after Venaseal treatment ? Do you pre-treat ??(4) Risks and benefits ?
This particular adhesive has long been used to treat variety of vascular conditions with excellent safety profile. But one should consider other options (such as Radiofrequency or laser ablation) if not comfortable with possible complications.
The technical success rate of thermal ablation procedures is roughly 95%. That means previously ablated saphenous veins will re-open 5% of the time even with experienced provider and will require an additional procedure. It certainly is a "retreat" but should not be considered as a free "retreat".