This article explains, in educational terms, stent retriever — how the technology works and where it fits. Because brain tissue is highly time-sensitive, rapid restoration of flow is central to endovascular stroke care in eligible patients. 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
Mechanical thrombectomy removes the clot with a catheter-based device, and it is used in selected patients alongside or after intravenous thrombolysis where indicated. Patient eligibility, the treatment window, and device selection are all determined by the treating neurointerventional team using imaging and current criteria. 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.
Stent Retriever Thrombectomy
A stent retriever is a self-expanding mesh deployed through a microcatheter across a clot, where it integrates with the thrombus and is then withdrawn to capture and extract it. Restoring flow in a large vessel occlusion is the goal, and the device is designed to engage clot within minutes of deployment. INVAMED's KinG Intracranial Revascularization Device is a self-expanding nitinol stent retriever with platinum markers at the proximal and distal ends of the basket for fluoroscopic visualization, intended for vessels including the internal carotid, middle and anterior cerebral, and basilar and vertebral arteries. According to INVAMED product content surfaced via its search index, the KinG device captures and extracts cerebral artery clots within a treatment window of up to 24 hours, though eligibility for any given patient is a clinical determination.
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. Liquid embolic use requires attention to concentration, radiopacity, and injection control for the target lesion.
Key Considerations
- For aneurysms, coil sizing and packing or flow-diverter selection are matched to the aneurysm's shape and neck.
- 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.
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.
What is the Libro embolization agent?
INVAMED's Libro is a non-adhesive liquid embolic agent combining EVOH copolymer, DMSO solvent, and tantalum for radiopacity, offered per INVAMED in multiple viscosity formulas for AVMs and tumors.
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.
About INVAMED
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.
Clinical and Technical Context
All INVAMED neurovascular devices are intended for use by trained neurointerventional operators under imaging guidance and per the IFU. 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. 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. Manufacturer statements, including the described up-to-24-hour window for the KinG device, reflect product content and do not establish individual eligibility.
Related on INVAMED
- Neurovascular Interventions — product category
- InWIRE Neurovascular Guidewire — Technical Overview
- Mechanical Thrombectomy for Stroke Explained — A Technical Guide
- Comparing Coiling and Flow diversion
Important Disclaimer
This article is intended for general educational and technical information about medical device technologies. It is not medical advice, a diagnosis, or a treatment recommendation, and it does not replace consultation with a qualified healthcare professional. Any decision about diagnosis or treatment should be made by a licensed clinician based on an individual assessment. INVAMED devices are intended for use by trained healthcare professionals in accordance with the applicable Instructions for Use (IFU) and local regulatory approvals. Product availability and indications vary by country.
Reviewed by the INVAMED Medical Affairs team. Content is educational and technical in nature.