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Tectorial membrane rack for aorta without inner leakage

A stent-graft, aorta technology, applied to the filter in the blood vessel, the device of the human tubular structure, medical science and other directions, can solve the problems of endoleak, short effective time, etc. Safety and efficacy of treatment

Inactive Publication Date: 2003-03-19
维科医疗器械(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the use of a balloon to expand is only an artificial external expansion. Once the external force is removed, the stent will rebound, so its effective time is very short. After a period of time, endoleaks will occur again.

Method used

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  • Tectorial membrane rack for aorta without inner leakage
  • Tectorial membrane rack for aorta without inner leakage
  • Tectorial membrane rack for aorta without inner leakage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment one: see attached figure 2 and image 3 As shown, an aortic stent graft for preventing endoleak is composed of a straight tube network stent 1 and a membrane 2 coated on the surface of the stent. In order to prevent internal leakage, an appropriate amount of a biocompatible superabsorbent polymer material is placed in the middle of the interlayer of the double-layer outer membrane 5 at both ends of the stent 1 according to its water absorption characteristics, and is formed by wrapping A sealing ring, when the water-absorbing material starts to absorb water and expand, it fills the space between the two ends of the stent and the blood vessel wall. The superabsorbent material can be selected from the above range, such as polyacrylic acid, polyvinyl alcohol and the like.

Embodiment 2

[0052] Embodiment two: see attached Figure 4 and Figure 5 As shown, an aortic stent graft for preventing endoleak is composed of a straight tube network stent 1 and a membrane 2 coated on the surface of the stent. In order to prevent internal leakage, a biocompatible superabsorbent polymer material is sewn on the port at one end of the covering film 2 to form a sealing ring 3 similar to a collar or a tire, which is filled in a water-swelling manner The gap between the vessel and the port of the stent. The sealing ring 3 is an annular pouch, and the pouch is filled with powder or granular superabsorbent polymer material, and the annular pouch is sewn on the port of the stent coating. Figure 4 The sealing ring 3 in the bracket is arranged on the membrane port at the upper end of the bracket and stands up like a collar. Figure 5 The middle sealing ring 3 is located at the film-covered port at the upper end of the support and is turned down similar to a tire shape.

Embodiment 3

[0053] Embodiment three: see attached Figure 6 ~ Figure 9 As shown, an aortic stent graft for preventing endoleak is composed of a straight tube network stent 1 and a membrane 2 coated on the surface of the stent. In order to prevent internal leakage, a biocompatible superabsorbent polymer material is sewn on the port at one end of the covering film 2 to form a sealing ring 3 similar to a collar or a tire, which is filled in a water-swelling manner The gap between the vessel and the port of the stent. The sealing ring 3 is a fiber tape, which is directly made of cellulose-based superabsorbent polymer material, and the fiber tape is placed on the port of the stent coating by sewing. Figure 6 The middle sealing ring 3 is arranged on the film-covered port at the upper end of the bracket and stands up like a collar. Figure 7 The middle sealing ring 3 is located at the film-covered port at the upper end of the support and is turned down similar to a tire shape. Figure 8 The ...

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Abstract

The tectorial membrane rack for aorta without inner leakage consists of one netted rack in the shape matching with aorta and tectorial membrane layer covering the rack. The present invention features that high-hydroscopicity polymer with biocompatibility is sewn to the end of the tectorial membrane to form collar-like sealing ring, which will expand to fill the interval between blood vessel and the rack after absorbing water. One kind of biodegradable coating is painted to the high-hydroscopicity material to retard its hydroscopic expansion. The said high-hydroscopicity material includes acrylic acid, acrylate, acrylamide, cellulose, etc. The present invention makes it possible to raise the safety and treating effect of operation.

Description

technical field [0001] The invention belongs to a medical device, in particular to a covered stent for human aortic aneurysm. The aortic covered stent can effectively prevent endoleak at both ends of the stent. Background technique [0002] Aortic aneurysm is the most common aneurysm, and 90% of aortic aneurysms are caused by atherosclerosis, and most of them occur after the age of 40. The male to female ratio is 10:1, and the incidence rate is about 5%. The final outcome of aortic aneurysm is rupture, such as rupture of the anterior wall, the mortality rate is as high as 90%. Aortic aneurysm is a common and dangerous vascular disease in clinical practice. According to reports in relevant medical journals, if patients with aortic aneurysm are not treated in time, their 5-year survival rate is only about 17%, and 63% of them die from aortic aneurysm rupture. Therefore, patients with aortic aneurysm should be treated in time once they are discovered...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/00A61F2/01A61F2/06A61L27/34A61L31/10A61M29/00
Inventor 常慧曾敏訾振军符伟国王玉琦陈毅生郭高东
Owner 维科医疗器械(苏州)有限公司
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