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Sine-wave tubular medical interventional stent

A sine wave and sine wave technology, applied in the field of medical sine wave tubular medical interventional stents, can solve the problems of insufficient radial support force of stents, poor body fluid flow performance, poor axial bendability, etc., and achieve good axial compliance The effect of high stability, smooth surface and small frictional resistance

Inactive Publication Date: 2005-07-20
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 disadvantages such as small radial support force of the stent and poor axial bendability.

Method used

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  • Sine-wave tubular medical interventional stent
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  • Sine-wave tubular medical interventional stent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see figure 1 , a sinusoidal waveform tubular medical interventional stent, is etched from a superelastic nickel-titanium alloy tube, showing a tubular network structure, consisting of a plurality of sinusoidal waveform circular ring-shaped basic structures 1 distributed along its axial direction, each The two sinusoidal ring-shaped basic structures 1 are connected by a sinusoidal connector 2 . The sine wave crest of each sine wave circular basic structure corresponds to the sine wave trough of its adjacent sine wave circular basic structure. The propagating directions of the sinusoidal fluctuations of the sinusoidal ring-shaped basic structure 1 and the sinusoidal connector 2 are perpendicular to each other. The connection point 4 between the sinusoidal ring-shaped basic structure 1 and the sinusoidal-wave connector 2 is selected at the middle position between the crest and the trough of the sinusoidal ring-shaped basic structure 1 . Between every two adjacent sinusoi...

Embodiment 2

[0029] see figure 2 , a sinusoidal waveform tubular medical interventional stent, is etched from a superelastic nickel-titanium alloy tube, showing a tubular network structure, consisting of a number of sinusoidal circular ring-shaped basic structures [1] distributed along its axial direction, each phase Between two adjacent sinusoidal waveform ring-shaped basic structures [1], they are connected by sinusoidal waveform connectors [2]. Between every two adjacent sinusoidal circular ring-shaped basic structures [1], the sinusoidal waveform connectors [2] are distributed at equal intervals, and the distance [13] is 1.282 mm, which is a sinusoidal circular ring-shaped basic structure [1] 1 times longer than the wavelength of the sine wave [8]. Other structures and dimensions of the stent in Embodiment 2 are the same as those in Embodiment 1.

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Abstract

The present invention relates to a sine wave shaped tubular medical intervertional supporting frame for dilating and supporting the narrow blood vessel, esophagus, bill duct, intestinal track and urethra, etc. of human interior. It is made up by etching metal tube, and has a tubular net-shaped structure formed from several sine wave shaped circular ring-like basic structures uniformly distributed along its axial direction. Said invention also provides its concrete structure and its advantages of adjustable radial supporting force and good axial flexibility, etc.

Description

technical field [0001] The invention relates to a medical sinusoidal waveform tubular medical interventional stent, 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 exi...

Claims

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Application Information

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