Evaluation of a new vascular occlusion device

Area of Science:

• Vascular Surgery
• Interventional Cardiology
• Biomedical Engineering

Background:

• Vascular occlusion devices are crucial for treating various cardiovascular conditions.
• Existing devices like coils have limitations, necessitating development of novel solutions.
• The patent ductus arteriosus (PDA) remains a target for innovative occlusion techniques.

Purpose of the Study:

• To evaluate a novel balloon-expandable vascular plug for efficacy in canine femoral/iliac arteries.
• To assess the device's performance in a canine model of patent ductus arteriosus (PDA).
• To determine the safety and potential limitations of the new vascular occlusion device.

Main Methods:

• Four vascular plug variations were implanted in 18 canine iliac/femoral arteries.
• Angiography was used for follow-up at 1-2 hours post-implantation.
• The 'butterfly' plug was tested in a canine PDA model, with long-term follow-up in some animals.

Main Results:

• Complete or near-complete occlusion was achieved in 12 of 18 arteries within 2 hours.
• Successful PDA occlusion occurred in 6 of 8 dogs within 1-2 days.
• One instance of vessel wall erosion occurred at 3 months without sequelae; three misplacements led to one fatality.

Conclusions:

• The balloon-expandable vascular plug shows promise for vascular occlusion, with no observed migration.
• Device sizing may be less critical compared to coils due to its design.
• Delivery system modifications and increased experience are required to mitigate misplacement risks.