Removing Blood Clots from Brain Vessels with a Special Catheter

This patent describes a specialized catheter system designed to quickly remove blood clots from tiny blood vessels in the brain, often used to treat strokes, by using suction.

What it covers

The patent describes an intravascular access system for medical procedures inside the brain's blood vessels, specifically for rapid aspiration thrombectomy. The system includes an aspiration or support catheter with a flexible, hollow tip (distal luminal portion) that has an inner diameter defining a lumen. This lumen extends from a proximal opening to a distal opening. A key feature is a rigid spine attached to at least the proximal end of this flexible tip, extending backward. The system also includes a dilator, which is a flexible, thin device designed to fit inside the catheter's hollow tip. This setup allows doctors to navigate delicate brain blood vessels, reach a clot, and remove it using aspiration, which means sucking it out.

What it doesn't cover

• —Does not cover systems for removing clots from blood vessels outside the brain (e.g., in the heart or legs).
• —Does not cover systems that use mechanical retrieval methods, like tiny cages or nets, instead of aspiration (suction).
• —Does not cover catheter systems where the rigid spine is not coupled to the proximal end of the flexible luminal portion.
• —Does not cover systems that lack a separate dilator component designed to be received within the catheter's lumen.
• —Does not cover catheters where the distal luminal portion is not flexible.
• —Does not cover systems where the rigid spine does not extend proximally from the luminal portion.

The clever bit

The clever part is combining a flexible catheter tip for navigating delicate brain vessels with a rigid spine attached proximally. This design likely provides better pushability and control for the surgeon while maintaining flexibility at the working end, which is essential for safely reaching and removing clots in the brain's intricate neurovasculature.

Why it matters

This technology is crucial for treating ischemic strokes, which happen when a blood clot blocks blood flow to the brain. Rapid removal of these clots can significantly reduce brain damage and improve patient outcomes, potentially preventing long-term disability or death. Systems like this enable doctors to perform minimally invasive procedures, reducing risks compared to open surgery.

Real-world examples

• 1.Neurovascular thrombectomy procedures
• 2.Catheters used in stroke treatment
• 3.Intravascular clot removal devices
• 4.Aspiration catheters for cerebral arteries