Human endoluminal stent with radial large deformation large holding power

Abstract

A human body lumen stent with radial large deformation and large support force is formed by etching a metal tube and is a tubular net-shaped structure, which is composed of a plurality of sine wave-shaped circular ring-shaped basic structures (1) which are distributed along the axial direction, the wave peaks of the sine waves between every adjacent two sine wave-shaped circular ring-shaped basic structures (1) are opposite and are connected by connecting parts (2) with Omega-shaped structures which are arranged at the both sides and combined back-to-back, and the connecting points (3) are selected at the vertex of the wave peaks of the sine wave-shaped circular ring-shaped basic structures (1). The rib width (5) of the connecting parts (2) is less than or equal to the rib width (4) of the sine wave-shaped circular ring-shaped basic structures (1). The end part of the lumen stent can be made into horn shape, and the internal surface and the external surface of the stent can be covered with a metal membrane, an oxide membrane, a polymer membrane or a sustained-release drug membrane. The material for etching the metal tube of the lumen stent can be nickel-titanium alloy, stainless steel, titanium alloy and pure metals, such as tantalum or gold etc. The structure of the invention has the radial large deformation and the large support force.

Description

technical field [0001] The invention relates to a medical stent with large radial deformation and large supporting force, which is used for expanding and supporting narrowed blood vessels, esophagus, bile duct, intestinal tract or urethra, etc., and belongs to the technical field of medical equipment manufacturing. Background technique [0002] Vascular embolism, esophageal cancer, benign prostatic hyperplasia and biliary stones are common luminal obstructive diseases in daily life. Open surgery can be used for clinical treatment. Not only is the operation difficult, but there are also some difficult problems to solve, such as many complications, The high risk and high recurrence rate require a more convenient, safe and effective method to solve the above difficulties, and the intervention of internal stents is an effective method. Intraluminal stents are a commonly used device and come in various shapes, with tubular being the most common. Most of the existing internal ste...

AI Technical Summary

Problems solved by technology

However, there are still some defects in the existing stents. For example, the commonly used non-vascular intraluminal stents are mostly braided with silk, which is in the shape of a tubular grid. Such stents have overlapping points of metal materials, which makes the fluidity of body fluids worse. There are signs of thrombus formation, the radial support force and radial deformation of the stent are insufficient, and there has been tear damage at the connection point

Commonly used vascular stents also have the disadvantages of small radial support force and poor structural stability.

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