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Large-radical-support-force medical stent

A technology of radial support and axial distribution, which is applied to the device, surgery, dilator and other directions of the human tubular structure, and can solve the problems of insufficient radial support force of the stent, small radial support force of the stent, and poor body fluid flow performance. , to achieve the effect of easy polishing, large radial support force and good structural stability

Inactive Publication Date: 2007-11-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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. And the radial support force of the bracket is insufficient, and the adjustable range is small
Commonly used vascular stents also have the disadvantages of small radial support force and poor structural stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Referring to Figure 1, a tubular stent for blood vessels in the human body is etched from a super-elastic nickel-titanium alloy tube and has a tubular mesh structure. The stent is composed of a plurality of sine-wave circular ring-shaped basic structures distributed along its axial direction. 1. Composition, between every two adjacent sine wave torus basic structure 1, the crests of the sine wave are opposite, and are connected by the "X"-shaped connector 2. The connection point 3 is selected in the sine wave torus basic structure 1 The middle position of the wave crest and trough. Between every two adjacent sine-wave annular basic structures 1, the “X”-shaped connectors 2 are distributed at equal intervals, and the distance 10 is one time of the sine wave wavelength 6 of the sine-wave annular basic structure 1. The rib width 5 of the "X"-shaped connecting member 2 is smaller than the rib width 4 of the sine wave torus basic structure 1.

[0017] The outer diameter 11 of th...

Embodiment 2

[0021] Refer to Figure 2. The tubular stent for blood vessels in the human body is etched from a superelastic nickel-titanium alloy tube and has a tubular mesh structure. The tubular stent for blood vessels consists of a plurality of sinusoidal waveforms distributed along its axial direction. The structure 1 is composed of two adjacent sine wave torus basic structure 1, the peaks of the sine wave are opposite, and are connected by the "X"-shaped connector 2, and the connection point 3 is selected in the sine wave torus basic structure The position between the crest and trough of 1. Between every two adjacent sine-wave toroidal basic structures 1, the "X"-shaped connectors 2 are equally spaced. The distance 10 is 3.729mm, which is the sine wave wavelength 6 of the sine-wave toroidal basic structure 1. 3 times. The rib width 5 of the "X"-shaped connecting member 2 is smaller than the rib width 4 of the sine wave torus basic structure 1. The other structures, dimensional features, an...

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Abstract

The present invention relates to a medical supporting frame with large radial supporting force. It is made up by etching metal tube, and is formed into a tubular net-shaped structure, the internal and external surfaces of said supporting frame can be covered with metal membrane, oxide membrane, high-molecular membrane or slowly-released medicine membrane, and the material of said metal tube can be nickel-titamium alloy, stainless steel, titanium alloy, pure metal tantalum or gold. Said invention also provides its concrete sructure characteristics and its advantages.

Description

Technical field [0001] The invention relates to a medical stent with a large radial supporting force, which is used for dilating and supporting stenotic blood vessels, esophagus, bile ducts, intestines or urethra and other human internal lumens, belonging to the technical field of medical equipment manufacturing. Background technique [0002] Vascular embolism, esophageal cancer, prostate hyperplasia and biliary calculi are common luminal obstructive diseases in life. Open surgery can be used in clinical treatment. Not only is the operation difficult, but there are also some difficult problems, such as many complications, The risk is high, the recurrence rate is high, etc., which requires a simpler, safer and effective method to solve the above difficulties. The use of internal stent intervention is an effective method. Intraluminal stent is a commonly used device, with various shapes, tubular is the most common. The existing internal stents for human cavities are mostly grid-lik...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M29/00A61F2/04
Inventor 储成林林萍华浦跃朴王世栋
Owner SOUTHEAST UNIV