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Thoracic aorta covered stent

A stent-graft, thoracic aorta technology, applied in stents, blood vessels, devices of human tubular structures, etc., can solve the problems of displacement of the blood vessel wall and the distal end, difficult to pass through the aortic arch, discount, etc. The effect of displacement and flexibility improvement

Active Publication Date: 2012-12-19
BEIJING PERCUTEK THERAPEUTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the thoracic aortic stent graft in the prior art is not easy to pass through the aortic arch, and after release, there are defects such as distortion, discount, endoleak, damage to the vessel wall and displacement and deformation at the distal end

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 Shown is the first embodiment of the thoracic aortic stent graft, which includes a piece of membrane 1 made of fiber material and a number of metal wires with biocompatibility, corrosion resistance and good mechanical and physical properties arranged on it. The first type of columnar single-turn 3, the second type of columnar single-turn 4 and the third type of columnar single-turn 2 are formed. Set a third-type columnar single coil 2 at both ends of the thoracic aortic stent-graft. Six first-type columnar single-turns 3 and six second-type cylindrical single-turns 4 are set, and the setting interval of each columnar single-turn is 5mm. The wave height of the first-type columnar single-turn 3 can be taken as 3mm, and the wire diameter is taken as 0.013", the wave number is 11; the wave height of the second type of columnar single-turn 4 is 5mm, the wire diameter is 0.017", and the wave number is 6. Each columnar single-turn is made of nickel-titanium a...

Embodiment 2

[0033] Such as figure 2Shown is the thoracic aortic stent graft in the second embodiment, the length of the membrane 1 is 210 mm, and the middle of the membrane 1 can be alternately provided with 7 first-type columnar single coils 3 and 6 second-type columnar single coils 4. The interval between the first columnar single circle and the second columnar single circle at both ends of the thoracic aortic stent graft may be 2.5 mm, and the remaining intervals may be 5 mm. The rest are the same as the first embodiment.

Embodiment 3

[0035] Such as image 3 Shown is the thoracic aortic stent-graft of the third embodiment, on the basis of the thoracic aortic stent-graft of the second embodiment, along the distal end (the end away from the heart) of the thoracic aortic stent-graft A second type of cylindrical single-turn 4 is arranged in the axial direction, and the axial overlap between the cylindrical single-turn 4 and the film 1 does not exceed 3mm.

[0036] Such as Figure 4 Shown is a schematic diagram of three kinds of columnar single coils of the thoracic aortic stent graft of the present invention. Wherein each size of the first type columnar single circle 3, the second type columnar single circle 4 and the third type columnar single circle 2 can be determined according to the patient's characteristics, and the two ends of each columnar single circle are connected with stainless steel sleeve 6.

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Abstract

The invention relates to a thoracic aorta covered stent, which is used for treating aneurysm of thoracic aorta and dissecting aortic aneurysm in minimally invasive surgeries. The thoracic aorta covered stent comprises a cover and a stent composed of a plurality of cylindrical single rings, wherein the cover is adhered to the stent to form a tubular cover; the plurality of cylindrical single rings are in wave patterns; a supporting frame is arranged at the near end of the stent; and each cylindrical single ring comprises a first type cylindrical single ring and a second type cylindrical single ring which are distributed at intervals on the tubular cover; the amount of the waveforms of the first type cylindrical single ring is not less than that of the second type cylindrical single ring; and the waveform of the first type cylindrical single ring is less than that of the second type cylindrical ring.

Description

technical field [0001] The invention relates to a covered stent for treating thoracic aortic aneurysms and dissecting aneurysms in minimally invasive surgery. Background technique [0002] In the field of minimally invasive surgery, artificial aortic stent-graft implantation technology is increasingly being used to treat aortic aneurysms and dissecting aneurysms. system, which is guided from the outside of the body to the aortic lesion via a previously implanted guidewire and released. The released aortic stent-graft covers the diseased part of the aorta, blocking its access to fresh blood supply, causing the aortic aneurysm to gradually form a thrombus, thereby reducing the pressure of the aortic aneurysm on surrounding tissues and organs, and eliminating the aortic aneurysm. Rupture poses a risk of profuse bleeding. Under the action of its own elasticity, the aortic stent graft is attached to the wall of the aorta, creating a new blood channel in the diseased aortic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/86A61F2/06
Inventor 杨凡肖家华郑炜
Owner BEIJING PERCUTEK THERAPEUTICS CO LTD
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