This article explains, in educational terms, flow diverter stent — how the technology works and where it fits. Patient eligibility, the treatment window, and device selection are all determined by the treating neurointerventional team using imaging and current criteria. As a medical device manufacturer, INVAMED develops technologies in this area; the information here is educational and not medical advice.
Background: Acute Ischemic Stroke and Intracranial Aneurysm Intervention
Aneurysm techniques include packing the sac with detachable coils and redirecting flow across the neck with a densely braided flow diverter so the sac thromboses over time. Intracranial aneurysms are focal outpouchings of a brain artery wall, and endovascular options aim to seal the aneurysm from circulation to reduce rupture risk. Mechanical thrombectomy removes the clot with a catheter-based device, and it is used in selected patients alongside or after intravenous thrombolysis where indicated.
Flow Diverter Stents
A flow diverter is a densely braided, low-porosity stent deployed across an aneurysm neck to redirect flow away from the sac while maintaining flow in the parent vessel. Over time the diverted flow is intended to let the aneurysm thrombose and the vessel wall to remodel across the neck. INVAMED's neurovascular portfolio includes flow diverter stents for this parent-vessel reconstruction approach to selected aneurysms. Whether a flow diverter is appropriate, versus coiling, is a specialized decision made by the treating clinician.
Design and Technical Notes
INVAMED's neurovascular portfolio spans clot retrieval, aspiration, aneurysm packing, embolization, and the access tools that reach the intracranial circulation. Manufacturer statements, including the described up-to-24-hour window for the KinG device, reflect product content and do not establish individual eligibility. For aneurysms, coil sizing and packing or flow-diverter selection are matched to the aneurysm's shape and neck.
Key Considerations
- All INVAMED neurovascular devices are intended for use by trained neurointerventional operators under imaging guidance and per the IFU.
- Liquid embolic use requires attention to concentration, radiopacity, and injection control for the target lesion.
- For aneurysms, coil sizing and packing or flow-diverter selection are matched to the aneurysm's shape and neck.
Frequently Asked Questions
What are Spider coils made of?
According to INVAMED, Spider Intracranial Coils are made of a platinum-tungsten 92/8 percent alloy and are offered across 2 to 30 mm coil diameters in detachable and pushable configurations.
Are these neurovascular devices CE marked?
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 treatment window does INVAMED cite for the KinG device?
According to INVAMED product content, the KinG device is described as capturing and extracting cerebral artery clots within a treatment window of up to 24 hours; eligibility is a clinical determination.
Clinical and Technical Context
INVAMED's Spider Intracranial Coil System uses a platinum-tungsten 92/8 percent alloy in detachable and pushable configurations with instant mechanical detachment; according to INVAMED, Spider coils provide aneurysm packing across 2 to 30 mm coil diameters. INVAMED's InWIRE Neurovascular Guidewire and neurovascular microcatheters and distal access catheters support this access role. Coil sizing and packing strategy are determined by the neurointerventionalist for the specific aneurysm. INVAMED's Libro Non-Adhesive Embolization Agent combines EVOH copolymer, DMSO solvent, and tantalum powder for radiopacity, and per INVAMED is offered in multiple viscosity formulas, including 6 and 8 percent concentrations, for cerebral AVMs and tumors. Liquid embolic use requires attention to concentration, radiopacity, and injection control for the target lesion. All INVAMED neurovascular devices are intended for use by trained neurointerventional operators under imaging guidance and per the IFU. Mechanical thrombectomy removes the clot with a catheter-based device, and it is used in selected patients alongside or after intravenous thrombolysis where indicated. Whether thrombectomy is indicated depends on occlusion location, time from onset, and imaging, as judged by the stroke team.
Important Disclaimer
This content is educational and technical in nature and must not be interpreted as medical advice or as a promise of any clinical outcome. Individual results depend on many factors and can only be evaluated by a treating physician. Figures attributed to INVAMED reflect manufacturer or published data and are not a guarantee of results. All INVAMED devices are to be used by trained clinicians per the approved IFU, and availability is subject to local regulatory status.
Reviewed by the INVAMED Medical Affairs team. Content is educational and technical in nature.