Implant delivery system and inner tube thereof

Abstract

The invention discloses an implant delivery system and an inner tube thereof; the implant delivery system comprises a handle, an outer tube and the inner tube; the outer tube and the inner tube are both connected with the handle; the handle controls the outer tube and the inner tube to move in the axial direction; the inner tube comprises an inner tube body and at least one protruding part located on the outer side of the inner tube body; each protruding part comprises a plurality of protruding single bodies; one ends of the protruding single bodies are connected with the inner tube body; and the other ends of the protruding single bodies extend towards the far end of the inner tube body. In the implant delivery system provided by the invention, the inner tube and an implant are unidirectionally occluded, so that a relatively large static friction force required by release of the implant is provided, and the release and positioning of the implant are accurate and stable without generating axial shortening; and meanwhile, the structure can effectively reduce the friction force between the inner tube and the implant when the inner tube retracts, so that the implant is prevented from being moved due to retraction of the delivery system, and the operation is safer.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an implant delivery system and an inner tube thereof. Background technique [0002] With the development of endoluminal technology, the use of stents has been widely recognized by radiologists, cardiologists and surgeons. Stents and stent grafts are used to support various tubular passages in the body, including arteries, veins, air tract, gastrointestinal tract, and bile ducts. The preferred method of placing a stent is to use a specialized delivery system through the body's natural pathways for precise placement and deployment at the intended treatment site. With the help of the small outer diameter of the delivery system, doctors can minimize surgical incisions to achieve minimally invasive procedures. [0003] Stents are typically plastically deformable (eg, "balloon-expandable" stents) or elastically deformable (eg, "self-expanding" stents) to return from a compres...

AI Technical Summary

Problems solved by technology

However, due to the large volume of the rear release mechanism itself, this method is generally only suitable for systems with a thicker outer tube diameter. In addition, because the inner tube bears a large axial compression force during the release process, it is prone to instability and bending during the release process.

[0006] Moreover, the above delivery system needs to operate multiple parts to release the stent. After the stent is released, an operating mechanism is required to release the rear release constraint at the far end, which has the disadvantage of complicated and difficult release.

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