Medtronic has patented a microcatheter with an improved inner liner for easier delivery of vascular reconstruction devices. The method involves stretching a PTFE tube to create a liner with enhanced toughness and low friction, making it easier to deploy expandable devices. GlobalData’s report on Medtronic 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 Medtronic, Prosthetic cardiac valves was a key innovation area identified from patents. Medtronic's grant share as of February 2024 was 59%. Grant share is based on the ratio of number of grants to total number of patents.

Low friction, tough microcatheter for vascular reconstruction device delivery

Source: United States Patent and Trademark Office (USPTO). Credit: Medtronic Plc

A recently granted patent (Publication Number: US11925766B2) outlines a method for producing a catheter with specific characteristics. The method involves longitudinally stretching a portion of a PTFE tube to create a PTFE liner with enhanced tensile strength and a specific radial coefficient of friction suitable for deploying an expandable device within the catheter. The process includes wrapping a coil over the PTFE liner and placing a sheath over the coil to complete the catheter assembly. Various techniques are described for stretching the PTFE tube, such as tensioning and heating, to achieve the desired properties of the liner.

Furthermore, the patent details the creation of a medical device incorporating the catheter with the longitudinally-stretched PTFE liner. The device includes the expandable device designed to exert a radial force on the liner, emphasizing the importance of the liner's tensile strength and radial coefficient of friction. The internal surface of the PTFE liner is engineered to reduce friction during the deployment of the expandable device, enhancing the overall functionality of the medical device. The patent highlights specific ranges for the radial coefficient of friction and the radial force exerted by the expandable device, ensuring optimal performance of the catheter in medical applications.

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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.