The Spider Peripheral Detachable Coil System is an INVAMED embolization device engineered for peripheral aneurysm occlusion, arteriovenous fistula management, and embolization of abnormal peripheral vessels. Built on a platinum-tungsten alloy platform, Spider combines a pushable-detachable delivery mechanism with high radiopacity to support controlled, visualized coil placement. This overview summarizes the system's design and clinical application concepts for interventional radiologists.
What Is the Spider Peripheral Coil System?
Spider is a detachable coil kit designed for the embolization of peripheral aneurysms, arteriovenous fistulas, and other abnormal vessels requiring controlled coil packing. The system is engineered to provide stable coil packing with controlled mechanical detachment, distinguishing it from purely pushable coil designs that lack a repositioning step.
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.
What Materials Are Used in Spider Coils?
Spider coils are constructed from a platinum-tungsten alloy in a 92/8% composition. This material combination is selected for several design reasons:
- Platinum contributes biocompatibility and inherent radiopacity, supporting visualization under fluoroscopy
- Tungsten adds mechanical strength and stiffness to the alloy, supporting structural integrity of the coiled configuration
- High radiopacity of the finished alloy is intended to help physicians achieve real-time fluoroscopic visibility throughout deployment, supporting assessment of coil packing density during the procedure
Spider coils are available across a diameter range of approximately 2–30 mm, allowing physicians to select an appropriately sized coil for vessels ranging from small branch arteries to larger aneurysm sacs.
What Is the Pushable-Detachable Delivery Mechanism?
Spider's delivery mechanism is described as pushable yet detachable, meaning the coil is advanced through a microcatheter like a standard pushable coil but includes a mechanical detachment step before final release. This design is intended to afford the precision of in-place detachment without the added complexity of electrolytic release systems, allowing physicians to reposition the coil prior to permanent deployment if the initial placement is not optimal.
This mechanical detachment approach is intended to optimize procedural control and may help reduce the risk of coil migration compared with certain purely pushable systems, particularly in higher-flow or more complex peripheral vascular anatomy.
What Are the Application Concepts?
The Spider Peripheral Coil System supports a range of peripheral embolization applications, including:
- Peripheral aneurysm occlusion
- Arteriovenous fistula management
- Embolization of abnormal or aberrant peripheral vessels
- Organ-specific procedures, such as splenic, renal, or hepatic artery branch occlusion, where appropriate
Device and coil sizing selection remain the responsibility of the treating physician, based on pre-procedural imaging and intraprocedural assessment of packing density.
Frequently Asked Questions
What diameter range is available for Spider Peripheral coils?
Spider Peripheral coils are available in diameters of approximately 2–30 mm, supporting a range of peripheral vessel and aneurysm sizes.
What does "pushable yet detachable" mean for procedural control?
It means the coil can be advanced like a standard pushable coil but includes a mechanical detachment mechanism, allowing the physician to confirm positioning and repositioning before permanently releasing the coil.
Why is radiopacity important in coil design?
High radiopacity allows physicians to clearly visualize the coil under fluoroscopy throughout deployment, supporting accurate placement and assessment of packing density in real time.
Related INVAMED Resources
- Embolization Products — INVAMED's full embolization device portfolio
- Neurovascular Interventions — related coil delivery technologies
- Contact INVAMED — request the IFU or technical specifications
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.