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Lumen stent

A lumen and body technology, applied in stents, blood vessels, and devices of human tubular structures, etc., can solve problems such as rupture and failure of intraluminal isolation therapy.

Active Publication Date: 2016-06-15
LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the blood flow continues to flow in, it may cause the false lumen of the dissection or the cavity of the aneurysm to continue to increase, and eventually lead to the serious consequences of its rupture, making the endovascular isolation therapy fail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0046] see image 3 , according to the first embodiment of the present invention, the lumen stent 2 includes a first tube body 21 and a second tube body 22. The second tube body 22 is sleeved outside the first tube body 21 and covers at least the first tube body 21. In part, one end of the second pipe body 22 is sealedly connected with the outer peripheral surface of the first pipe body 21 .

[0047]Specifically, the first tube body 21 has radial expansion capability, can be compressed under the action of external force, and can self-expand or be restored to the original shape and maintain the original shape by mechanical expansion (such as balloon expansion) after the external force is removed, Therefore, after being implanted into the lumen, it can be fixed in the lumen through its radial supporting force against the lumen wall. The first tube body 21 includes a first radial support structure 211 disposed on the entire tube body. For example, the first radial support struct...

no. 2 example

[0065]On the basis of the first embodiment, the endoluminal stent of the second embodiment is further within the maximum diameter area L of the above-mentioned thin film body 222, and the radial deformation capacity of the second radial support structure 221 is greater than that of the first radial support The radial deformation ability of the structure 211, that is, under the same radial force (including the radial force, the magnitude and direction, and the acting time are respectively the same), the diameter of the first radial support structure 211 in the radial support section The change in length is smaller than the change in diameter and length of the second radial support structure 221 at the same position; The change rate of the diameter and length of the first radial support structure 211 in the support section is smaller than the change rate of the diameter and length of the second radial support structure 221 at the same position, and the change rate is the ratio of...

no. 3 example

[0077] see Figure 12 , the difference from the lumen stent of the first embodiment is that the orifice of the second pipe body 22 of the lumen stent 2 according to the third embodiment close to the proximal end 23 is sealedly connected with the outer peripheral surface of the first pipe body 21 to form The nozzle is closed, and the nozzle of the second tube body 22 near the distal end 24 is opened. The above-mentioned second tube body 22 is all located near the proximal end 23 of the first tube body 21, but those skilled in the art should know that the drawings are only used as examples, and are not intended to limit the present invention. According to the teaching of the present invention, the second tube body 22 is provided near the distal end 24 of the first tube body 21 .

[0078] see Figure 13A and 13B Specifically, the second pipe body 22 may further include a straight pipe section 221a, a tapered pipe section 222a, and a connecting section 223a, the connecting sect...

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Abstract

The invention discloses a lumen stent which includes a first tube body and a second tube body. The second tube body sleeves outside the first tube body and has at least one end in hermetic connection with the outer surface of the first tube body. The second tube body includes a thin film body which covers at least part of the first tube body and a second radial supporting structure which is disposed in the maximum radius-length region of the thin film body and surrounds the maximum radius-length region. The second radial supporting structure has radius-length supporting property. According to the embodiments of the invention, the implantation of the lumen stent can form a semi-enclosed gap between the first tube body and the second tube body, or form a semi-enclosed gap between the second tube body and a tube wall, so that blood that flow into the aforementioned gap can serve as a filling material and block off I type endoleak channel and prevent blood from flowing into a tumor body or an interlayer position.

Description

technical field [0001] The invention relates to implanted medical devices, in particular to a lumen stent and a lumen stent system. Background technique [0002] Currently, endoluminal stents can be used to perform endoluminal isolation to isolate the diseased area in the human lumen. For example, lumen stents can be used to isolate arterial dissection or aneurysm in blood vessels. Such methods have the advantages of less surgical trauma, less intraoperative blood transfusion, faster postoperative recovery and shorter hospital stay, so they have gradually replaced traditional open surgery. The lumen stent usually has radial expansion ability, and is fixed in the lumen by sticking to the blood vessel lumen wall by its radial supporting force. In order to prevent the stent from falling off, the stent needs to have a sufficiently large radial support force, and the greater the radial support force, the stronger the rigidity of the stent after radial expansion. However, due to...

Claims

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Application Information

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IPC IPC(8): A61B17/12A61F2/82
CPCA61B17/12118A61B17/12145A61F2002/823A61F2210/0076A61F2/848A61F2/852A61F2002/061A61F2002/077A61F2002/8486A61F2220/005A61F2220/0058A61F2250/0018A61F2250/0063A61F2250/0069A61F2/07A61F2220/0075A61F2250/0039A61F2230/0067A61F2/89A61F2/97A61F2002/065
Inventor 舒畅肖本好
Owner LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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