Cyanoacrylate embolization of experimental aneurysms

Area of Science:

• Interventional Neuroradiology
• Biomaterials Science
• Vascular Surgery

Background:

• Cyanoacrylates are effective occlusive agents in neurovascular interventions.
• Endovascular treatment of aneurysms aims for long-term efficacy.
• Canine aneurysm models provide a platform for evaluating new treatment strategies.

Purpose of the Study:

• To assess the potential of cyanoacrylates to improve long-term results in endovascular aneurysm treatment.
• To compare coil embolization with cyanoacrylate-based embolization in canine aneurysm models.
• To investigate methods for controlled endovascular delivery of cyanoacrylates.

Main Methods:

• Construction of venous pouch carotid aneurysms in canine models.
• Comparison of coil embolization for lateral wall and bifurcation aneurysms.
• Evaluation of cyanoacrylate-coated gelatin sponges and direct endovascular cyanoacrylate deposition.
• Assessment of angiographic results, neointima thickness, and delivery control at 3 and 12 weeks.

Main Results:

• Bifurcation aneurysms treated with coils had higher recurrence rates and thinner neointimas compared to lateral wall aneurysms.
• Cyanoacrylate-coated sponges improved angiographic outcomes and neointima thickness.
• Direct endovascular cyanoacrylate delivery resulted in stray emboli and parent vessel issues, though improved with a coil.
• Cyanoacrylate embolization of bifurcation aneurysms showed better angiographic results than coil embolization at 3 months.

Conclusions:

• Cyanoacrylate embolization demonstrated potential in improving angiographic results and reducing aneurysm recurrence.
• Challenges remain in achieving controlled and safe endovascular delivery of cyanoacrylates.
• Further research is needed to develop safe delivery techniques for clinical application.