Improved aorta blood vessel shunting device

Abstract

The utility model discloses an improved aorta blood vessel shunting device, which comprises an aorta stent blood vessel and a plurality of inner chimney stents, and is characterized in that the aorta stent blood vessel comprises a proximal end section, a telecentric end section and a concave part arranged between the proximal end section and the telecentric end section, the concave part comprises a first step and a second step, a first receding section is arranged between the first step and the proximal end section, and a second receding section is arranged between the second step and the first step. By the arrangement, avoiding spaces can be provided for release of the branch artery vascular stent, the diameter of the first step and the diameter of the second step are increased respectively, and radial blood flow spaces in the first step and the second step can be increased effectively.

Description

Technical Field

[0001] The utility model relates to the field of aortic implantable blood vessels, in particular to an improved aortic blood vessel shunt device. Background Art

[0002] An improved aortic arch covered stent-type blood vessel (authorization announcement number: CN109009563B) has been disclosed, which includes an aortic stent and three branch artery stents. The main stent is divided into a proximal end, a distal end and a recessed portion (with two steps), with an opening 1 on the right side of the proximal end, an opening 2 on the right side of the first step, and an opening 3 on the left side of the distal end, and no branch vessel yielding section is provided. The openings are respectively fixed with inner chimney stents 1, 2 and 3, and the branch artery stents are respectively placed in these inner chimney stents.

[0003] However, in order to provide space for the release of the branch artery stent, the outer diameter of the first step can only be equal to or slightly larger than the difference between the outer diameter of the proximal end segment and the outer diameter of the inner chimney stent 1; similarly, the outer diameter of the second step is equal to the difference between the outer diameter of the first step and the outer diameter of the inner chimney stent 2. However, the aortic stent constructed with such a size will result in a reduction in the radial blood flow space of the first and second steps, especially for patients with a smaller aortic vessel diameter. Utility Model Content

[0004] In order to solve the problem that the intracavitary graft in the prior art is difficult to repair the aortic vessel with a small diameter or for patients who need to construct multiple branch artery stents, the utility model takes the end close to the heart as the left side and the end far from the heart as the right side. The utility model provides an improved aortic vessel shunt device, including an aortic stent vessel and a plurality of inner chimney stents, characterized in that the aortic stent vessel includes a proximal end segment, a distal end segment and a recessed portion arranged between the proximal end segment and the distal end segment, and the recessed portion is sequentially provided with a first clearance segment, a first step, a second clearance segment and a second step from left to right, and the bottom of the recessed portion is on the same horizontal line;

[0005] An opening 1 is provided in the middle and upper part of the right side wall of the proximal end section, and an opening 2 is provided in the middle and upper part of the right side of the first step; an opening 3 is provided in the middle and upper part of the left side wall of the distal end section, and an inner chimney bracket 1, an inner chimney bracket 2 and an inner chimney bracket 3 are fixedly arranged in the openings 1, 2 and 3 respectively; the inner chimney bracket 1 and the inner chimney bracket 3 are sewn along the inner walls of the proximal end section and the distal end section respectively, and the inner chimney bracket 2 is sewn along the inner wall of the first step;

[0006] The diameter of the first clearance section is not greater than the difference between the right diameter of the proximal end section and the diameter of the first opening, and the length of the first clearance section is not less than the diameter of the first inner chimney support; the left diameter of the first step is greater than the right diameter of the first clearance section.

[0007] Furthermore, the diameter of the second giving way section is not greater than the difference between the right diameter of the first step and the diameter of the second opening, and the length of the second giving way section is not less than the diameter of the second inner chimney support; the left diameter of the second step is greater than the right diameter of the second giving way section.

[0008] Furthermore, the diameter of the first step (D 第一台阶 ) is smaller than the right diameter (D 近心端段右侧 ) and the opening diameter (D 开口一 ) is 5-10mm larger, that is, D 第一台阶 -(D 近心端段右侧 -D 开口一 )=5-10mm.

[0009] Furthermore, the diameter of the second step (D 第二台阶 ) is smaller than the right diameter of the first step (D 第一台阶右侧 ) and opening two (D 开口二 ) The diameter difference is 5-10mm, that is, D 第二台阶 -(D 第一台阶右侧 -D 开口二 )=5-10mm.

[0010] Furthermore, the left top surface of the first step and the right top surface of the first yielding section are transitionally connected via a coating.

[0011] Furthermore, the coating 1 forms an obtuse-angled inclined surface structure with the top surface of the relinquishing section 1; or, the coating 1 extends in an arc shape from the top surface of the relinquishing section 1 upward to the left top surface of the first step.

[0012] Furthermore, the right top surface of the second yielding section and the left top surface of the second step are transitionally connected via a second coating.

[0013] Furthermore, the second coating and the top surface of the second giving way section form an obtuse-angled inclined surface structure; or, the second coating extends in an arc shape from the top surface of the second giving way section upward to the left top surface of the second step.

[0014] Furthermore, the aortic stent blood vessel is composed of a tubular membrane 1 and a plurality of annular corrugated stents 1 sewn at intervals inside the tubular membrane 1, and the inner chimney stent 1, inner chimney stent 2 and inner chimney stent 3 each include a tubular membrane 2 and a plurality of annular corrugated stents 2 sewn at intervals inside the tubular membrane 2.

[0015] Furthermore, the opening one, the opening two and the opening three are staggeredly arranged, and the plane formed by the central axes of any two inner chimney stents is not on the axially symmetrical plane of the aortic stent blood vessel.

[0016] The plane where the central axis of the inner chimney support is located refers to: the central axes of any two supports, the only plane formed by these two parallel axes in three-dimensional space.

[0017] The axial symmetry plane of the aortic stent graft refers to: the two points at the 12 o'clock position and the 6 o'clock position at the right opening of the opening, the two points are connected as line 1; the two points at the 12 o'clock position and the 6 o'clock position at the leftmost side of the proximal end are connected as line 2; line 1 and line 2 are two parallel axes, forming the only plane in three-dimensional space.

[0018] The utility model has the following advantages: a first clearance section is added between the first step and the proximal end section of the aortic stent blood vessel, and a second clearance section is added between the second step and the first step. The first clearance section and the second clearance section can respectively provide clearance space for the release of the branch artery blood vessel stent, so that the diameter of the first step and the diameter of the second step are respectively increased. The first clearance section and the second clearance section also make the openings 1, 2, and 3 offset from each other, which is more conducive to the stent extending from the openings.

[0019] It can effectively increase the radial blood flow space inside the first step and the second step, create more favorable intravascular repair conditions for patients with small aortic diameter or who need to construct multiple branch vessels, and reduce surgical risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an improved aortic vascular shunt device according to the utility model;

[0021] Figure 2 It is a cross-sectional view of the improved aortic vascular shunt device of the utility model taken along the AA direction;

[0022] Figure 3 It is a cross-sectional view of the improved aortic vascular shunt device of the utility model taken along the BB direction;

[0023] Figure 4 This is a schematic diagram of the structure of the utility model after it is released in the thoracic aorta and three branch vessels are branched into arterial vessels

[0024] Figure markings: 11-proximal end section, 12-recessed portion, 13-distal end section, 14-giving way section one, 15-giving way section two, 21-first step, 22-second step, 31-inner chimney bracket one, 32-inner chimney bracket two, 33-inner chimney bracket three, 110-opening one, 210-opening two, 130-opening three, 141-membrane one, 151-membrane two, 101-tubular membrane one, 102-annular corrugated bracket one, 301-tubular membrane two, 302-annular corrugated bracket two. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. In order to thoroughly understand the utility model, detailed steps and detailed structures will be proposed in the following description to illustrate the technical solution of the utility model. The preferred embodiments of the utility model are described in detail as follows, but in addition to these detailed descriptions, the utility model can also have other implementation methods.

[0026] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. The utility model takes the end close to the heart as the left side and the end away from the heart as the right side.

[0027] like Figure 1 , 4 As shown, the utility model provides an improved aortic vascular shunt device, including an aortic stent and three inner chimney stents. The aortic stent includes a proximal end segment 11, a distal end segment 13, and a recessed portion 12 opened between the proximal end segment 11 and the distal end segment 13, and an opening 110 is opened in the middle and upper part of the right side wall of the proximal end segment 11.

[0028] The recessed portion 12 forms a first step 21 and a second step 22 from left to right, and an opening 210 is provided in the upper and middle portion of the right side of the first step 21; an opening 3 130 is provided in the upper and middle portion of the left side wall of the distal end section 13, and an inner chimney bracket 1 31, an inner chimney bracket 2 32 and an inner chimney bracket 3 33 are fixed in the opening 110, the opening 210 and the opening 3 130 respectively.

[0029] A clearance section 14 is also provided between the first step 21 and the proximal end section 11. The diameter of the clearance section 14 is not greater than the difference between the right diameter of the proximal end section 11 and the diameter of the opening 110, and the length of the clearance section 14 is not less than the diameter of the inner chimney support 31, so as to ensure that the top surface of the clearance section 14 has sufficient height and length so that the branch artery stent blood vessel can smoothly extend from the opening 110 to the branch blood vessel of the human body.

[0030] A second clearance section 15 is provided between the second step 22 and the first step 21 . The diameter of the second clearance section 15 is not greater than the difference between the right diameter of the first step 21 and the diameter of the second opening 210 , and the length of the second clearance section 15 is not less than the diameter of the second inner chimney support 32 .

[0031] The left side of the first step 21 and the right top surface of the giving way section 14 are transitionally connected through the coating 141, and the coating 141 and the top surface of the giving way section 14 form an obtuse-angle inclined surface structure; the right top surface of the giving way section 2 15 and the left top surface of the second step 22 are transitionally connected through the coating 2 151, and the coating 2 151 and the top surface of the giving way section 2 15 form an obtuse-angle inclined surface structure.

[0032] like Figure 1-3 As shown, since the front ends of the first step 21 and the second step 22 are provided with the first and second clearance sections 14 and 15, respectively, the diameter of the first step 21 can be greater than or equal to 5-10 mm greater than the difference between the right diameter of the proximal end section 11 and the diameter of the opening 110, and the diameter of the second step 22 can be greater than or equal to 5-10 mm greater than the difference between the right diameter of the first step 21 and the diameter of the opening 210, thereby effectively increasing the radial blood flow space inside the first step 21 and the second step 22.

[0033] like Figure 3 As shown, opening one 110, opening two 210 and opening three 130 are staggered, that is, the plane formed by the central axes of any two inner chimney stents is not on the axial symmetric plane of the aortic stent blood vessel. This structure is more suitable for the aortic arch structure of the human body.

[0034] like Figure 1 As shown, the aortic stent vessel is composed of a tubular membrane 101 and a plurality of annular corrugated stents 102 sutured at intervals in the tubular membrane 101. The inner chimney stent 1 31, the inner chimney stent 2 32 and the inner chimney stent 33 each include a tubular membrane 2 301 and a plurality of annular corrugated stents 2 302 sutured at intervals in the tubular membrane 2 301.

[0035] Both the annular corrugated stent 102 and the annular corrugated stent 2 302 are made of medical stainless steel alloy rings with good biocompatibility, chemical stability, mechanical and physical properties, such as nickel-based alloys, cobalt-based alloys, 316 medical stainless steel, shape memory alloys or degradable or degradable polymer materials; while the tubular membrane 101 and the tubular membrane 2 301 are polytetrafluoroethylene membranes, polyester fiber membranes, polyamide membranes or polypropylene membranes.

[0036] In other embodiments, the coating 1 141 and the coating 2 151 may also adopt the following structure: the coating 1 141 extends in an arc shape from the top surface of the making way section 14 from bottom to top to the left top surface of the first step 21; the coating 2 151 extends in an arc shape from the top surface of the making way section 2 15 from bottom to top to the left top surface of the second step 22.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An improved aortic vascular bypass device, comprising an aortic stent blood vessel and a plurality of inner chimney stents, characterized in that: The aortic stent blood vessel comprises a proximal end segment, a distal end segment and a recessed portion arranged between the proximal end segment and the distal end segment, wherein the recessed portion is provided with a first giving way segment, a first step, a second giving way segment and a second step in sequence from left to right; and the bottoms of the recessed portions are on the same horizontal line; An opening 1 is provided in the middle and upper part of the right side wall of the proximal end section, and an opening 2 is provided in the middle and upper part of the right side of the first step; an opening 3 is provided in the middle and upper part of the left side wall of the distal end section, and an inner chimney bracket 1, an inner chimney bracket 2 and an inner chimney bracket 3 are fixedly arranged in the openings 1, 2 and 3 respectively; the inner chimney bracket 1 and the inner chimney bracket 3 are sewn along the inner walls of the proximal end section and the distal end section respectively, and the inner chimney bracket 2 is sewn along the inner wall of the first step; The diameter of the first clearance section is not greater than the difference between the right diameter of the proximal end section and the diameter of the first opening, and the length of the first clearance section is not less than the diameter of the first inner chimney support; the left diameter of the first step is greater than the right diameter of the first clearance section.

2. An improved aortic vascular shunt device according to claim 1, characterized in that: The diameter of the second giving way section is not greater than the difference between the right diameter of the first step and the diameter of the second opening, and the length of the second giving way section is not less than the diameter of the second inner chimney support; the left diameter of the second step is greater than the right diameter of the second giving way section.

3. An improved aortic vascular shunt device according to claim 1, characterized in that: The diameter of the first step is 5-10 mm larger than the difference between the right diameter of the proximal end section and the first diameter of the opening.

4. An improved aortic vascular shunt device according to claim 1, characterized in that: The diameter of the second step is 5-10 mm larger than the difference between the right diameter of the first step and the second diameter of the opening.

5. The improved aortic vascular shunt device according to claim 2, characterized in that: The left top surface of the first step and the right top surface of the first yielding section are transitionally connected via a coating.

6. An improved aortic vascular shunt device according to claim 5, characterized in that: The coating 1 forms an obtuse-angled inclined surface structure with the top surface of the first relinquishing section; or, the coating 1 extends in an arc shape from the top surface of the first relinquishing section upward to the left top surface of the first step.

7. An improved aortic vascular shunt device according to claim 2, characterized in that: The right top surface of the second yielding section and the left top surface of the second step are transitionally connected via a second coating.

8. An improved aortic vascular shunt device according to claim 7, characterized in that: The second coating and the top surface of the second giving way section form an obtuse-angled inclined surface structure; or, the second coating extends in an arc shape from the top surface of the second giving way section upward to the left top surface of the second step.

9. An improved aortic vascular shunt device according to claim 1, characterized in that: The aortic stent blood vessel is composed of a tubular membrane 1 and a plurality of annular corrugated stents 1 sewn at intervals inside the tubular membrane 1. The inner chimney stent 1, inner chimney stent 2 and inner chimney stent 3 each include a tubular membrane 2 and a plurality of annular corrugated stents 2 sewn at intervals inside the tubular membrane 2.

10. An improved aortic vascular shunt device according to any one of claims 1 to 9, characterized in that: The opening one, the opening two and the opening three are arranged in a staggered manner, and the plane formed by the central axes of any two inner chimney supports is not on the axial symmetric plane of the aortic stent blood vessel.

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