Embolization with N-Butyl Cyanoacrylate: Properties, Techniques, Applications, and Pitfalls

Area of Science:

• Interventional Radiology
• Vascular Surgery
• Medical Device Technology

Background:

• N-butyl cyanoacrylate (NBCA) glue is a liquid embolic agent used for vascular occlusion.
• It rapidly polymerizes upon contact with bodily fluids, forming a solid embolus.
• NBCA glue is effective for controlling hemorrhage in small or tortuous vessels and in urgent hemostasis.

Purpose of the Study:

• To review the technique, applications, and potential complications of N-butyl cyanoacrylate (NBCA) glue embolization.
• To highlight the importance of understanding vascular anatomy and hemodynamics for safe and effective embolization.
• To emphasize the role of operator experience and procedural adherence in achieving successful outcomes.

Main Methods:

• NBCA glue is mixed with an oil-based contrast agent for viscosity and polymerization control.
• Injection is performed under fluoroscopic guidance via microcatheter using pressure- or flow-dependent techniques.
• Modified techniques include flow-controlled injection with balloon catheters or ethanol addition to reduce adhesiveness.

Main Results:

• NBCA glue embolization is effective in treating gastrointestinal bleeding, arteriovenous, portal vein, and lymphatic anomalies.
• It is also used for preoperative devascularization of hypervascular tumors and balloon-occluded retrograde transvenous obliteration.
• The primary risk is nontarget embolization, potentially leading to tissue necrosis or ischemia.

Conclusions:

• N-butyl cyanoacrylate (NBCA) glue embolization is a versatile and powerful tool for vascular occlusion.
• Successful outcomes depend on meticulous patient selection, adherence to protocols, and operator expertise.
• A thorough understanding of vascular anatomy and hemodynamics is crucial for minimizing complications.