Inari Medical has been granted a patent for an aspiration system that can rapidly remove clot material from blood vessels. The system includes an aspiration pump, an aspiration catheter, a second chamber, a hemostasis valve, and a user-actuatable valve. When the user opens the valve, negative pressure in the chambers causes rapid aspiration of fluid and clot material. GlobalData’s report on Inari Medical gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Inari Medical, Customized implants was a key innovation area identified from patents. Inari Medical's grant share as of September 2023 was 32%. Grant share is based on the ratio of number of grants to total number of patents.

Intravascular clot aspiration system with accelerated response

Source: United States Patent and Trademark Office (USPTO). Credit: Inari Medical Inc

A recently granted patent (Publication Number: US11744691B2) describes an aspiration system with accelerated response. The system includes an aspiration pump in communication with a first chamber, and a coupled assembly consisting of an aspiration catheter, an aspiration tube, a second chamber, and a hemostasis valve. The system also features a user-actuatable valve between the second chamber and the aspiration catheter.

When the user actuates the valve after negative pressure is generated in the first and second chambers, fluid flow from the second chamber into the first chamber causes rapid aspiration into the second chamber. The system is designed to be used for intravascular positioning within a patient's blood vessel, particularly for the removal of clot material such as pulmonary embolisms or deep vein thrombosis.

The hemostasis valve in the system is configured to receive a second catheter and direct it through the aspiration catheter. It consists of a tubular member with a lumen that can slidably receive the second catheter. The valve also includes a filament that can be moved between a first position, where it constricts the lumen to create a seal around the second catheter, and a second position, where it partially opens the lumen.

The second chamber in the system is removably carried by the assembly, and a filter is included within the chamber. The filter has pores sized to inhibit clot material from flowing through while allowing blood to flow. The filter can also be removed from within the second chamber if needed.

Overall, this patent describes an aspiration system that allows for rapid and efficient removal of clot material from blood vessels. The system includes various components such as the aspiration pump, catheter, chambers, valves, and filters to facilitate the aspiration process. The design and configuration of the system aim to provide an accelerated response and effective clot removal, particularly in cases of pulmonary embolisms or deep vein thrombosis.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.