Detachable steel spring coils for vessel occlusion

Area of Science:

• Biomedical Engineering
• Interventional Radiology
• Vascular Surgery

Background:

• Vessel occlusion is a critical procedure in interventional radiology.
• Current spring coils have limitations in precise placement and retrieval.
• Improved coil design is needed for enhanced safety and efficacy.

Purpose of the Study:

• To develop and evaluate a novel spring coil design for vessel occlusion.
• To assess the safety and accuracy of the modified coil delivery system.
• To demonstrate the retrievability of the new coil design.

Main Methods:

• Modification of standard spring coils with a screw-on attachment for a delivery wire.
• In vivo implantation of the modified coils in canine and ovine models.
• Evaluation of coil placement accuracy and ease of retrieval from delivery catheters and vessels.

Main Results:

• The modified spring coils enabled safe and accurate placement.
• Successful implantation was achieved in both canine and ovine subjects.
• Coils were easily retrieved from delivery catheters and vessels, unlike conventional coils.

Conclusions:

• The novel screw-on attachment enhances the deliverability and retrievability of spring coils for vessel occlusion.
• This improved design offers a significant advantage over conventional coils, potentially improving procedural outcomes.