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Pre-bent aortic membrane-covered stent and manufacturing method thereof

A technology of covered stents and manufacturing methods, applied in stents, medical science, surgery, etc., can solve problems such as new aortic breaks, dissection/operation-related death, etc., to prevent new breaks, reduce and The effect of cracking and eliminating the elastic back force

Inactive Publication Date: 2012-09-19
上海中山医疗科技发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing pre-curved aortic stent grafts will produce elastic straightening force and the resulting stress after being passively bent at curved parts such as the aortic arch, which will easily lead to new aortic tears, and the latter is the result of aortic dissection. The number one cause of dissection / procedure-related death after repair

Method used

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  • Pre-bent aortic membrane-covered stent and manufacturing method thereof
  • Pre-bent aortic membrane-covered stent and manufacturing method thereof
  • Pre-bent aortic membrane-covered stent and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A pre-curved aortic stent graft consists of a metal stent 3 and a stent graft 4. The metal stent 3 includes a curved keel 1 and 7 rings of Z-shaped wave-shaped stents 2 connected to the keel 1. The metal bracket 3 is made of nickel-titanium alloy, and the covering film 4 is made of PET.

[0028] Its production method is:

[0029] 1. Preparation of Metal Scaffold 3:

[0030] Such as Image 6 As shown, it is a schematic diagram of forming a nickel-titanium alloy stent. The bending mold includes a straight tubular body 8, and 14 rows of stainless steel rods 9 (not all shown) are connected to the straight tubular body 8 for hanging nickel. Titanium alloy wires, two adjacent rows of stainless steel rods 9 are arranged in a staggered manner. Form a straight tubular stent as follows:

[0031] (1) Be that Ni content is 54.2wt%, Ti content is 45.3wt%, and the nickel-titanium alloy wire that diameter is 0.2mm starts from wherein a stainless steel bar 9 of the second row of be...

Embodiment 2

[0053] A pre-curved aortic stent graft consists of a metal stent 3 and a stent graft 4. The metal stent 3 includes a curved keel 1 and 7 rings of Z-shaped wave-shaped stents 2 connected to the keel 1. The metal bracket 3 is made of nickel-titanium alloy, and the covering film 4 is made of PET.

[0054] Its production method is:

[0055] 1. Preparation of Metal Scaffold 3:

[0056] Such as Image 6 As shown, it is a schematic diagram of forming a nickel-titanium alloy stent. The bending mold includes a straight tubular body 8, and 14 rows of stainless steel rods 9 (not all shown) are connected to the straight tubular body 8 for hanging nickel. Titanium alloy wires, two adjacent rows of stainless steel rods 9 are arranged in a staggered manner. Form the Z-shaped corrugated support 2 as follows:

[0057] (1) Be that Ni content is 57.1wt%, Ti content is 42.5wt%, and the nickel-titanium alloy wire that diameter is 0.4mm starts from wherein 1 stainless steel bar 9 of the second ...

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Abstract

The invention provides a pre-bent aortic membrane-covered stent and a manufacturing method thereof. The pre-bent aortic membrane-covered stent is characterized by consisting of a metal stent and a covering membrane, wherein the metal stent comprises a bent keel and a plurality of Z-shaped wavy stents. By the pre-bent aortic membrane-covered stent, elastic straightening force generated after the conventional stent is passively bent on bent parts such as an aortic arc part and stress formed by the elastic straightening force can be eliminated, and newly-generated cleavages of aorta caused by the stent can be reduced and prevented.

Description

technical field [0001] The invention relates to a pre-curved aortic covered stent and a manufacturing method thereof. Background technique [0002] Existing pre-curved aortic stent grafts will produce elastic straightening force and the resulting stress after being passively bent at curved parts such as the aortic arch, which will easily lead to new aortic tears, and the latter is the result of aortic dissection. Number one cause of dissection / procedure-related death after repair. Contents of the invention [0003] The object of the present invention is to provide a pre-curved aortic stent-graft and a manufacturing method thereof. The prepared pre-curved aortic stent-graft can eliminate the defects caused by passive bending of existing stents at curved parts such as the aortic arch. The elastic recoil force, and the resulting stress, reduce and prevent new aortic ruptures caused by the stent. [0004] In order to achieve the above object, the present invention provides a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/90A61L31/02A61L31/10
Inventor 董智慧符伟国王玉琦郭大乔徐欣陈斌蒋俊豪杨珏史振宇
Owner 上海中山医疗科技发展有限公司
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