Micro-Tech Nanjing has filed a patent for a cold snare device that includes a spring tube, a drive wire, and a loop. The loop is connected to the drive wire and can be controlled to enter and exit the spring tube. The use of a spring tube instead of a plastic outer tube increases the strength of the device, making it more effective in cutting large polyps. GlobalData’s report on Micro-Tech Nanjing 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 Micro-Tech Nanjing, Surgical robots was a key innovation area identified from patents. Micro-Tech Nanjing's grant share as of September 2023 was 52%. Grant share is based on the ratio of number of grants to total number of patents.
A cold snare with a spring tube for cutting polyps
A recently filed patent (Publication Number: US20230310023A1) describes a cold snare device used in medical procedures. The cold snare consists of several components, including a spring tube, a drive wire, and a loop. The drive wire passes through the spring tube and moves back and forth along its longitudinal axis, allowing the loop to enter and exit the tube.
In one embodiment, the cold snare also includes an end member fixedly connected to the distal end of the spring tube. This end member has an inner hole that communicates with the spring tube, and the loop enters and exits the tube through this hole. The proximal end of the end member holds the distal end of the spring tube, while the distal end of the end member serves as a contraction port.
The distance between a merger point and an opening of the loop is specified to be between 5-15 mm in another claim. The end member is made of metal and has a round corner between its distal end face and inner circumferential surface.
The loop itself is made of a nickel-titanium alloy and can have a round, square, or flat cross-section. It is described as a single wire structure and can be in the shape of a water drop or oval. The loop comprises a first ring segment, a necking segment, and a second ring segment connected sequentially. The first and second ring segments have smooth transitions from their proximal ends to their respective intersection points with the necking segment.
The cold snare may also include a riveted tube, with the distal end of the drive wire and the proximal end of the loop fixedly connected into the tube. An outer skin, such as a polymer tube, can be cladded on the outside of the spring tube. Additionally, a scale for measuring the size of a polyp to be cut may be provided at the distal end of the spring tube.
The spring tube itself can be a flexible or elastic metal tube, such as a metal wire wound spring tube or a spirally cut metal tube. It can also be a combination of these structures.
Overall, this patent describes a cold snare device with various components and features that enable its use in medical procedures. The device allows for the manipulation of a loop to enter and exit a spring tube, providing potential benefits in cutting polyps or other tissue.
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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
