Method for preparing intravascular stent
A vascular stent and tubular technology, applied in the field of vascular stent preparation, can solve the problems of high cost, poor effect, and difficulty in preparing thin-walled thin tubes, and achieve the effect of easy acquisition and low cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0037] see Figure 1-10 , the method for preparing the stent of the present invention is shown in the figure.
[0038] figure 1 It is an embodiment of the present invention. First, the material is magnesium alloy WE43, and the plate material with a thickness of 0.2mm is laser cut and etched, and carved into a figure 1 For the parallelogram-like sheet-like bracket with the pattern shown, the short side of the parallelogram is used as the circumference of the tubular bracket, and the sheet-like bracket is wound spirally around the fixed axis 1, and the winding direction is as follows: figure 1 shown. The sheet support has welding points, such as figure 1As shown, 2 and 3 are a group of welding points, 4 and 5 are a group of welding points, and so on. After the sheet-like support is crimped and formed, each group of welding points is in contact and welded by a transistor-type current welding method.
[0039] Will and figure 1 The sheet-like bracket with the same pattern is c...
Embodiment 2
[0042] Various pattern structures that meet the requirements of the scaffold can be used to prepare the scaffold by the method of helical coiling. Firstly, take a poly-lactic acid (PLLA) sheet with a thickness of 0.2mm, cut the sheet mechanically, and engrave it into image 3 The sheet-like bracket of the structure shown is a parallelogram-like structure, with solder joints reserved according to the design, and then wound in a helical direction to form a tubular bracket at last.
[0043] In addition, the above plate is laser etched into a rectangular shape, the pattern is as follows Figure 4 As shown, the winding axis is parallel to the long side of the rectangle, and the winding is performed, and the welding spots are welded by laser method to obtain a tubular stent.
[0044] The above-mentioned bracket is heat-treated to shape, and kept at a temperature of 300K for 20 minutes to obtain a bracket product.
Embodiment 3
[0046] Take a 316L stainless steel plate with a thickness of 0.25mm, laser cut and etch the plate, and engrave it into a flower-shaped sheet-shaped closed bracket unit, erect the bracket from the middle along the axial direction, and curl the "petals" 90° in the same direction, Form a tubular support unit with a "flower center" as the base, such as Figure 5 and Figure 6 As shown in the figure, there are two kinds of sheet-like support unit structures, Figure 7 for Figure 6 The crimped bracket units, 14 and 15 are reserved welding spots, and finally the plurality of units can be welded together to form a bracket through these two welding spots using a transistor-type current welding method.
[0047] Then keep it at 1050°C for 1 hour, and heat it in furnace cooling.
[0048] Finally, commercially available stainless steel chemical polishing liquid was used for polishing.
PUM
| Property | Measurement | Unit |
|---|---|---|
| Thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More