When a large blood vessel in the brain becomes blocked by a clot, restoring blood flow quickly is a clinical priority. Mechanical thrombectomy stroke treatment is an endovascular procedure designed to physically remove that clot using a specialized device threaded through the blood vessels. Among the tools used for this purpose is the stent retriever, a self-expanding mesh device that engages the clot directly. This article explains, in general educational terms, how stent retrievers are engineered to function and where they fit into acute stroke care.
What Happens During a Thrombectomy Procedure?
A mechanical thrombectomy procedure is typically performed by an interventional neuroradiologist or neurointerventionalist. A catheter is introduced into an artery, usually in the wrist or groin, and guided through the vascular system up into the brain under imaging guidance. Once the catheter reaches the site of the blockage, a smaller microcatheter is advanced through the clot itself. A stent retriever device is then deployed through this microcatheter directly at the location of the obstruction. The goal is to engage the clot mechanically so it can be withdrawn from the vessel, allowing blood flow to be restored to the affected brain tissue. Outcomes vary by patient, and a qualified physician determines whether this approach is suitable based on imaging findings and clinical presentation.
How Does a Stent Retriever Physically Capture a Clot?
A stent retriever is built as a self-expanding mesh structure that is delivered to the blockage site in a compressed state inside a microcatheter. When the microcatheter is withdrawn, the mesh expands outward against the vessel wall and integrates with the surrounding thrombus material. This design allows the device to interlace with the clot rather than simply pushing against it. Once engagement is confirmed through imaging, the physician withdraws the stent retriever together with the captured clot, often while applying aspiration at the catheter tip to help maintain control of the clot during removal. This general mechanism—mesh deployment, integration with the thrombus, and controlled withdrawal—is common to stent retriever technology used in mechanical thrombectomy stroke procedures.
Where the KinG Device Fits Into This Category
INVAMED manufactures the KinG Intracranial Revascularization Device, which the manufacturer describes as a stent retriever, or flow restoration device, intended for acute ischemic stroke. According to the manufacturer, KinG is designed for capturing and removing large clots from the intracranial arteries with the aim of restoring perfusion. It is listed among devices intended for acute stroke therapy in cases of large vessel occlusion. As with all stent retriever technology, KinG is one component of a broader care pathway that includes patient selection, imaging, and post-procedure monitoring; specifications beyond what the manufacturer states are not detailed here, and clinicians should consult the official Instructions for Use (IFU) for complete technical information. KinG belongs to INVAMED's broader neurovascular interventions product category, which also includes flow diverter stents, detachable coils, and neurovascular access catheters.
Why Is Large Vessel Occlusion a Target for This Approach?
Large vessel occlusion, or LVO, refers to a blockage in one of the brain's major arteries, and it is frequently associated with more significant stroke symptoms than blockages in smaller vessels. Because the clot burden in an LVO is often too large or too firmly lodged for clot-dissolving medication alone to fully clear, mechanical retrieval offers a complementary or alternative approach in appropriately selected patients. Physicians typically confirm LVO using imaging such as CT angiography before considering a mechanical thrombectomy stroke intervention.
Who decides if a patient is a candidate for mechanical thrombectomy?
A qualified stroke physician or interventional specialist determines candidacy based on factors such as imaging findings, the location and size of the occlusion, time since symptom onset, and the patient's overall clinical condition. This decision is individualized and outcomes vary by patient.
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.