SurModics has been granted a patent for a low-friction septum that provides a leak-resistant seal for vascular access devices. The device includes an enclosure with a cavity for a medical device, a first seal portion, and a second seal portion with a septum seal. The second seal portion is divided into multiple discrete portions with mating surfaces that have raised portions and depressions. The patent claims a device with three or more discrete portions. GlobalData’s report on SurModics 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 SurModics, Bioresorbable stent coating was a key innovation area identified from patents. SurModics's grant share as of September 2023 was 49%. Grant share is based on the ratio of number of grants to total number of patents.

Patent granted for low-friction septum for vascular access device

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

A recently granted patent (Publication Number: US11730943B2) describes a device for vascular access hemostasis. The device includes an enclosure that partially receives a medical device and defines a cavity. It also has a first seal portion and a second seal portion, with the cavity located between them. The second seal portion is made up of three or more discrete portions, each separated by split lines. These discrete portions have mating surfaces with a surface topology consisting of raised portions and depressions.

The first seal portion of the device includes an inwardly sloped portion with an outer surface. A hydrophilic layer is disposed on this outer surface. The inwardly sloped portion forms a frustoconical shape. Additionally, a hydrophilic layer is present on the mating surfaces of each discrete portion of the second seal portion.

The raised portions and depressions on the mating surfaces of the device have a regular pattern of peaks and valleys. The pitch of these peaks and valleys ranges from about 0.01 mm to about 1.0 mm, while the vertical distance between the top of the peaks and the bottom of the valleys is also about 0.01 mm to about 1.0 mm.

The device includes one or more splits that pass through the barrel and the septum seal of the second seal portion but not through the entire enclosure. Support ribs are connected to the second seal portion and are designed for compressive interfacing with a housing.

The first seal portion of the device can be a hole seal or a ring seal. The second seal portion is held in compression by a mating housing. The mating surface of the device includes a portion with the surface topology of raised portions and depressions, as well as a substantially flat portion.

In addition to the device, the patent also describes a sealing device. This device includes an enclosure that compressively interfaces with a housing, a first seal portion with an opening, and a second seal portion. The second seal portion is divided into three or more discrete portions by a split along a split plane. These discrete portions have mating surfaces with a surface topology of raised portions and depressions. The device enclosure also includes support ribs in compressive communication with the second seal portion.

The support ribs in the sealing device are offset from the split by about 45 degrees and are substantially symmetrical relative to the split.

The patent also covers a method of making a sealing device. This involves obtaining an enclosure with a first seal portion and a second septum seal portion, and forming a split in the second seal portion to create three or more discrete portions with mating surfaces consisting of raised portions and depressions.

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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.