Understanding the MultiBEAM plug design features helps interventional radiologists evaluate whether a nitinol vascular plug is well suited to a specific vessel occlusion task. This clinician-focused guide breaks down the frame architecture, materials, and delivery characteristics behind INVAMED's MultiBEAM vascular plug system.
What Is the Frame Architecture?
MultiBEAM's frame is constructed from nitinol, a nickel-titanium shape-memory alloy that allows the device to be compressed to a low profile for delivery and then self-expand to its designed geometry once released. This super-elastic property allows the frame to retain its intended shape even after repositioning or multiple deployment attempts within the same procedure, which can support more controlled placement in challenging anatomy.
The plug's multisided, self-centering geometry is designed to extend radially against the vessel wall, distributing contact across the vessel circumference rather than relying on a single point of fixation. This design intent is to reduce the likelihood of migration once the plug is seated.
What Role Does the Internal Fiber Fill Play?
In addition to the metallic frame, MultiBEAM incorporates internal fibers designed to increase surface area within the deployed device. These fibers are intended to promote thrombus formation around and within the plug, working alongside the mechanical occlusion provided by the frame itself. This dual mechanism—mechanical blockage plus a thrombogenic surface—is a common design principle across many embolic devices, including embolization coils.
What Are the Sizing and Delivery Specifications?
MultiBEAM is available across a diameter range of approximately 4–22 mm, giving physicians flexibility to match device size to target vessel diameter as determined by pre-procedural imaging. The device is designed for compatibility with standard 4F–5F delivery catheter systems, which supports integration into existing interventional radiology suites without requiring specialized delivery hardware.
Key sizing and compatibility considerations clinicians typically evaluate include:
- Target vessel diameter and any tapering along the intended landing zone
- Vessel tortuosity and the deliverability of the chosen catheter system
- Flow characteristics of the vessel, particularly in higher-flow arterial segments
- Proximity to adjacent branch vessels that should be preserved
How Does Biocompatibility Factor Into Design?
Nitinol is widely used in implantable cardiovascular and peripheral vascular devices due to its established biocompatibility profile and corrosion resistance. MultiBEAM's construction from top-tier, biocompatible materials is intended to support both procedural success and long-term device performance following implantation. As with any implanted device, individual patient factors and vessel biology influence outcomes, and appropriateness is determined by the treating physician.
Frequently Asked Questions
Why is nitinol commonly chosen for vascular plug frames?
Nitinol offers shape-memory and super-elastic properties that allow a device to be compressed for delivery through a small catheter and then reliably self-expand to a consistent, pre-designed shape once deployed, which supports repeatable procedural outcomes.
What catheter sizes are compatible with MultiBEAM?
MultiBEAM is designed for compatibility with standard 4F–5F catheter systems, which supports use within typical interventional radiology procedural setups.
Does the fiber fill affect deployment time?
The fiber fill is designed to work passively alongside the mechanical frame, promoting thrombus formation without requiring additional deployment steps beyond standard plug placement.
Related INVAMED Resources
- Embolization Products — INVAMED's full embolization device portfolio
- MultiBEAM Vascular Plug Overview — clinical application concepts for MultiBEAM
- 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.