Cyanoacrylate closure for varicose veins is a non-thermal technique that seals an incompetent vein using a small amount of medical-grade adhesive delivered through a catheter. Unlike heat-based methods, this approach does not rely on thermal energy to close the vein, which changes how the procedure is performed and what patients may experience. This guide explains the mechanism, procedure flow, and key considerations.
What Is Cyanoacrylate Vein Closure?
Cyanoacrylate closure, sometimes referred to informally as "vein glue" treatment, uses a specialized medical adhesive to permanently seal an incompetent saphenous or perforator vein. The adhesive is delivered through a thin catheter positioned inside the diseased vein under ultrasound guidance. Once in contact with the vein wall, the adhesive polymerizes rapidly, closing the vein.
Because no thermal energy or extensive tumescent anesthesia is required, this technique is often described as non-thermal, non-tumescent (NTNT) vein closure. INVAMED's VenaBLOCK system is an example of a cyanoacrylate-based closure device designed for this type of application, indicated for closure of the great and small saphenous veins, or perforator veins, in the endovenous treatment of incompetent varicose veins.
How Is the Procedure Typically Performed?
A cyanoacrylate closure procedure generally follows this sequence:
- Ultrasound-guided access — the physician identifies the target vein and inserts a catheter through a small needle puncture.
- Catheter positioning — the catheter is advanced to the appropriate starting point within the diseased vein segment.
- Adhesive delivery — small, controlled amounts of cyanoacrylate adhesive are delivered as the catheter is withdrawn along the vein.
- Manual compression — the physician applies external compression along the vein to help ensure even adhesive contact with the vein wall.
- Closure confirmation — ultrasound is used to confirm vein closure before concluding the procedure.
Polymerization begins quickly once the adhesive contacts the vein wall under appropriate conditions, allowing the physician to work along the vein segment in a controlled, stepwise manner.
How Does This Differ From Thermal Techniques?
The defining difference is the closure mechanism. Thermal techniques, such as radiofrequency ablation, use heat to cause vein wall collagen to contract, which typically requires tumescent anesthesia to protect surrounding tissue and provide comfort during energy delivery. Cyanoacrylate closure instead relies on a chemical/mechanical seal from the adhesive itself, which means large volumes of tumescent anesthesia are generally not required. This can translate to fewer needle injections during the procedure, though individual experiences and physician techniques vary.
What Should Patients Know Before the Procedure?
As with any vascular procedure, cyanoacrylate closure carries risks and is not appropriate for every patient. Suitability depends on factors such as vein anatomy, extent of reflux, and overall health, all of which should be assessed by a qualified physician. Some patients may have a sensitivity to the adhesive components, which is another reason a thorough medical history and physician evaluation are essential before proceeding.
Frequently Asked Questions
Does cyanoacrylate closure require anesthesia?
The procedure typically requires only minimal local anesthesia at the entry point, rather than the more extensive tumescent anesthesia used in thermal techniques. Specific anesthesia approaches should be discussed with the treating physician.
Is vein glue treatment permanent?
Cyanoacrylate closure is intended to permanently seal the treated vein segment. As with any vein procedure, individual outcomes vary, and a physician can discuss expected durability based on a patient's specific anatomy.
What happens to the adhesive after the procedure?
The adhesive remains within the closed vein segment as the body's natural healing processes gradually reabsorb the treated vein. Physicians can explain the expected tissue response based on current clinical understanding.
Related INVAMED Resources
- Varicose Vein Treatment Devices
- How Does Radiofrequency Ablation Work for Veins?
- Contact INVAMED for Product Information
Medical Disclaimer: This article is provided for general informational and educational purposes only and does not constitute medical advice, diagnosis, or treatment recommendation. It is not a substitute for consultation with a qualified healthcare professional. Product indications, availability, and regulatory status vary by country. Always refer to the official Instructions for Use (IFU) and consult a licensed physician for guidance specific to your situation. INVAMED devices are intended for use by trained healthcare professionals.