A stent and a stent system

A segmental and regional technology, applied in the direction of stents, can solve problems such as difficult extraction, large surgical trauma, and damage

Active Publication Date: 2019-05-03
BIOTYX MEDICAL (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For children with ductus arteriosus-dependent complex congenital heart disease, there is no fully symptomatic stent in the prior art, but permanent stents for other indications are used for treatment. At times, another surgery is required to remove the permanent stent that has grown in the tissue, and then ligate the ductus arteriosus or place an occluder to close the ductus arteriosus
Surgical operation is very traumatic and because the stent has grown in the arterial duct tissue, it is very difficult to remove, which is easy to cause injury or other complications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A ball expandable stent, such as Figure 6 As shown, it includes a 5mm long degradable segmental region 11 and a 3mm long non-degradable segmental region 12 disposed at the distal end of the stent. The degradable segment area 11 can be made of degradable nitrided iron tube by laser engraving and polishing. It can be developed by itself, but the development is weaker than that of the non-degradable segment. It can be coated with rapamycin polylactic acid coating. The non-degradable segmental area 12 can be made by laser engraving and polishing with a high-developability platinum-chromium alloy tube, which can be developed by itself. The degradable segment area 11 and the non-degradable segment area 12 can be connected together by welding, and then pressed onto the balloon catheter.

[0058] After the stent is expanded and released by the balloon catheter in vitro, the axial profile of the main body of the stent without restraint is rectangular, and is suitable for arte...

Embodiment 2

[0062] A ball-expanded stent includes a 10mm-long degradable section area and 5mm-long non-degradable section areas arranged at both ends of the stent. The degradable segmental area can be made of degradable polylactic acid tubes by laser engraving and polishing, which cannot be developed by itself, and no development structure is set. Among them, the non-degradable segmental area can be made of high-developing tantalum-niobium alloy tubes through laser engraving and polishing, and can be developed by itself. The degradable segment area and the non-degradable segment area can be connected together by crimping, and then crimped to the balloon catheter.

[0063] After the stent is expanded and released in vitro by the balloon catheter, the axial profile of the main body of the stent without restraint is drum-shaped, and is suitable for arterial catheters with a large outer diameter in the middle and smaller outer diameters at both ends. The high visibility of the non-degradable s...

Embodiment 3

[0067] A ball-expanded stent includes a 16mm-long degradable section area and a 4mm-long non-degradable section area arranged at one end of the stent. The degradable segment area can be made of degradable pure zinc tube through laser engraving and polishing, which can be visualized by itself, but the visualization is weaker than that of the non-degradable segment. The non-degradable segmental area can be made by laser engraving and polishing with high-visibility platinum-chromium alloy tube, which can be developed by itself. The degradable segment area and the non-degradable segment area can be connected together by riveting, and then crimped to the balloon catheter.

[0068] After the stent is expanded and released in vitro by the balloon catheter, the axial profile of the stent main body without restraint is dumbbell-shaped, and is suitable for arterial catheters with obviously small middle outer diameter and large outer diameter at both ends. The high visibility of the non...

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Abstract

The invention relates to a stent. The stent includes at least one degradable section zone and at least one non-degradable section zone which are connected to each other. The axial length of the at least one degradable section zone is not less than 3 mm. At least one end of the stent is provided with the non-degradable section zone the axial length of which is not less than 3 mm. The stent enablessubsequent arterial duct closing after implantation of the stent into an arterial duct without the need of taking out the stent, thus reducing the probability of harm to child patients and other complications. The invention also provides a stent system.

Description

technical field [0001] The invention relates to the field of interventional medical devices, in particular to a bracket and a bracket system. Background technique [0002] The ductus arteriosus 82 is the normal blood flow channel between the aorta 81 and the pulmonary artery 83 in the fetal period (such as figure 1 shown). Because the fetus's pulmonary respiratory function is not complete at this time, there is no pulmonary blood circulation, the pulmonary artery blood from the right ventricle does not flow into the lungs like normal adults, but directly enters the aorta through the arterial duct and then flows to the whole body, while the blood from the left ventricle Blood enters the ascending aorta normally, so the patency of the ductus arteriosus is necessary for blood circulation in the embryonic period. After birth, the lungs expand and perform the function of gas exchange. The pulmonary circulation and the systemic circulation perform their respective duties. The du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/915
CPCA61F2/915
Inventor 林文娇
Owner BIOTYX MEDICAL (SHENZHEN) CO LTD
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