Large vessel stent with adjustable neck two-branch positions and use mode

Abstract

The invention provides a great vessel stent with adjustable neck two-branch positions and a use mode. The great vessel stent comprises a main covered stent body and branch covered stents. The main body covered stent is composed of a main body metal stent and a main body stent covering film, and the main body stent covering film is fixedly connected to one side of the main body metal stent; the branch covered stent is composed of a branch metal stent and a branch stent covering film; the three preset holes are formed in the corresponding area of the aortic arch through the main covered stent body and used for reconstructing the three branch blood vessels respectively, meanwhile, blood supply of the branch blood vessels in the operation can be guaranteed, and an extra cavity is formed between the blood vessel wall supported by the main metal stent body and the covered concave part of the main stent body, so that the blood vessel wall is more convenient to reconstruct. Not only is the subsequent guide wire super-selection space increased, but also the three preset holes have a larger anatomical adaptation range; by selecting and fixing the left common carotid artery branch, the positions of the unknown artery and the left subclavian can be adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of vascular stents, and in particular to a large blood vessel stent with adjustable neck two-branch positions and a use method thereof. Background Art

[0002] Gunshot wounds, stab wounds, cuts, explosion injuries and car accidents may cause carotid artery or combined jugular vein injuries. Common types of injuries are side wall injuries, lacerations or ruptures. Arteriovenous fistulas may also occur. Symptoms include wound bleeding or cranial nerve dysfunction. Hematomas can be palpated locally. For patients with transverse cervical artery injuries accompanied by severe neurological dysfunction, even if the arterial rupture is repaired surgically, the neurological function will not be restored due to prolonged cerebral ischemia. Therefore, only cases of carotid artery injury that do not cause severe cranial nerve dysfunction can be effectively treated by arterial repair surgery.

[0003] During branch vessel reconstruction surgery, a covered stent is needed to support the blood vessels. When using the existing covered stent, it is not convenient to adjust the covered stent according to individual differences because the distances and angles of the three branch vessels in the neck are different.

[0004] In order to solve the above technical problems, a large blood vessel stent with adjustable two-branch position in the neck and a method of use are proposed. Summary of the invention

[0005] In view of this, the present invention provides a large blood vessel stent with adjustable two-branch positions in the neck and a method of use to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the present invention is implemented as follows: a large blood vessel stent with adjustable two-branch positions in the neck, comprising a main covered stent and a branch covered stent;

[0007] The main body coated stent is composed of a main metal stent and a main body stent coating, the main body stent coating is fixedly connected to one side of the main metal stent, one side of the main metal stent is provided with three preset holes, and one side of the main body stent coating is integrally formed with three recessed parts;

[0008] The branch coated stent is composed of a branch metal stent and a branch stent coating, and the branch stent coating is fixedly connected to one side of the branch metal stent.

[0009] Further preferably, a flange seal is provided on one side of the branch metal bracket.

[0010] Further preferably, the main metal bracket and the branch metal bracket are both made of a magnesium alloy as a base, mixed with polylactic acid and polycaprolactone.

[0011] Further preferably, the main stent coating and the branch stent coating are both made of polytetrafluoroethylene, dacron, polyester or polyurethane as main materials.

[0012] Further preferably, the size ratio of the main metal bracket to the branch metal bracket is 3.75:1.

[0013] Further preferably, the positions of the three preset holes can be adjusted. The central hole among the three preset holes is used to fix the left common carotid artery, and the holes on both sides can be adjusted according to the positions of the innominate artery and the left subclavian artery. The corresponding position adjustment can be made by bending the main body of the coated stent, or the corresponding position can be pre-opened when opening the hole.

[0014] As shown in the figure, the present invention also provides a method for using a large blood vessel stent with adjustable neck two-branch positions, comprising the following steps:

[0015] S1. Install the main stent graft by using the main conveyor to open the interlayer so that the main stent graft and the blood vessel are completely fixed;

[0016] S2, installing the branch stent graft by using a branch conveyor;

[0017] S3, guidewire superselection. During the guidewire superselection process, the extra cavity generated between the vascular wall and the concave part increases the space for guidewire superselection;

[0018] S4. Release the stent, completely release the main stent graft and branch stent graft.

[0019] Further preferably, in S2, the flange seal of the branch stent graft is used to pull the recessed portion of the main stent graft until it is attached to the greater bend in a semi-released state, thereby effectively avoiding internal leakage.

[0020] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0021] 1. The present invention sets three preset holes in the corresponding area of ​​the aortic arch through the main covered stent, which are respectively used to reconstruct three branch blood vessels, and can also ensure the blood supply of the branch blood vessels during the operation. The main metal stent can open the interlayer, and the position of the main covered stent and the blood vessel is completely fixed. The additional cavity generated between the blood vessel wall supported by the main metal stent and the concave part of the main stent covered film not only increases the space for subsequent guide wire superselection, but also makes the three preset holes have a larger anatomical adaptability range;

[0022] 2. The present invention sets three preset holes that can be adjusted in position, so that the central preset hole fixes the left common carotid artery, and the positions of the preset holes on both sides can be adjusted according to the positions of the innominate artery and the left subclavian artery. The corresponding position adjustment can be made by bending the main covered stent, or the corresponding position can be pre-opened when opening the hole.

[0023] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural diagram of the present invention;

[0026] Figure 2 It is a structural diagram of the main covered stent in the present invention;

[0027] Figure 3 It is a cross-sectional structural diagram of the main covered stent in the present invention;

[0028] Figure 4 It is a structural diagram of the branch stent graft in the present invention;

[0029] Figure 5 is a cross-sectional structural diagram of a branch stent graft in the present invention;

[0030] Figure 6 The figure is a flow chart of the method of the present invention.

[0031] Figure numerals: 10, main body coated bracket; 11, main body metal bracket; 12, main body bracket coating; 13, preset hole; 14, recessed portion; 20, branch coated bracket; 21, branch metal bracket; 22, branch bracket coating; 23, flange seal. DETAILED DESCRIPTION

[0032] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0033] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-6 As shown, an embodiment of the present invention provides a large blood vessel stent with two branches in the neck with adjustable positions, which is composed of a main covered stent 10 and a branch covered stent 20.

[0035] The main body coated bracket 10 is composed of a main metal bracket 11 and a main bracket coating 12. The main bracket coating 12 is fixedly connected to one side of the main metal bracket 11. Three preset holes 13 are opened on one side of the main metal bracket 11. Three recessed parts 14 are integrally formed on one side of the main bracket coating 12.

[0036] The branch stent graft 20 is composed of a branch metal stent 21 and a branch stent graft 22 . The branch stent graft 22 is fixedly connected to one side of the branch metal stent 21 . A flange seal 23 is provided on one side of the branch metal stent 21 .

[0037] In one embodiment, the main metal bracket 11 and the branch metal bracket 21 are both made of magnesium alloy as the base, mixed with polylactic acid and polycaprolactone, and the main bracket coating 12 and the branch bracket coating 22 are both made of polytetrafluoroethylene, polyester, polyester or polyurethane as the main material.

[0038] In one embodiment, the size ratio of the main metal bracket 11 to the branch metal bracket 21 is 3.75:1.

[0039] In one embodiment, the main conveyor responsible for conveying the main coated stent 10 has a catheter with a pre-bent shape and a circumferential self-alignment property.

[0040] In one embodiment, the positions of the three preset holes 13 can be adjusted, wherein the central preset hole 13 fixes the left common carotid artery, and the positions of the preset holes 13 on both sides can be adjusted according to the positions of the innominate artery and the left subclavian artery. The corresponding position adjustment can be made by bending the main coated stent 10, or the corresponding position can be pre-opened when opening the hole.

[0041] A method for using a large blood vessel stent with adjustable neck two-branch positions, comprising the following steps:

[0042] S1, installing the main body stent graft 10, installing the main body stent graft 10 through the main body conveyor, opening the interlayer, so that the main body stent graft 10 and the blood vessel are completely fixed;

[0043] S2, installing the branch stent graft 20, and installing the branch stent graft 20 through the branch conveyor;

[0044] S3, guidewire superselection, during which the extra cavity generated between the blood vessel wall and the recessed portion 14 increases the space for guidewire superselection;

[0045] S4. Release the stent, and completely release the main stent graft 10 and the branch stent graft 20.

[0046] In one embodiment, in S2, the recessed portion 14 of the main stent graft 10 is pulled up in a semi-released state through the flange seal 23 of the branch stent graft 20 until it is attached to the greater bend, while effectively avoiding internal leakage.

[0047] When the present invention is working: the main stent graft 10 is provided with three preset holes 13 in the area corresponding to the aortic arch, which are respectively used to reconstruct three branch blood vessels, and can also ensure the blood supply of the branch blood vessels during the operation; the main stent graft 10 is separated from the main metal stent 11 at the large bend in the preset holes 13 and the surrounding areas, forming a concave portion 14 of the main stent graft 12, at which time the main metal stent 11 can open the interlayer, and the position of the main stent graft 10 and the blood vessel is completely fixed, and the main metal stent 11 is The additional cavity created between the propped-up vascular wall and the recessed portion 14 not only increases the space for subsequent guidewire superselection, but also enables the three preset holes 13 to have a larger anatomical adaptability range. A post-release mechanism is arranged at the proximal end to avoid the vent effect during the release process, that is, the main coated stent 10 deviates toward the distal end during the release process. The branch coated stent 20 is provided with a flange seal 23 at the proximal end, which can be used to lift the recessed portion 14 of the main coated stent 10 in a semi-released state until it is attached to the major bend, while effectively avoiding internal leakage.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A large blood vessel stent with adjustable two-branch position in the neck, characterized in that: It comprises a main stent graft (10) and a branch stent graft (20); The main body coated stent (10) is composed of a main metal stent (11) and a main body stent coating (12); the main body stent coating (12) is fixedly connected to one side of the main metal stent (11); one side of the main metal stent (11) is provided with three preset holes (13); one side of the main body stent coating (12) is integrally formed with three recessed portions (14); The branch stent graft (20) is composed of a branch metal stent (21) and a branch stent graft (22), and the branch stent graft (22) is fixedly connected to one side of the branch metal stent (21).

2. The large blood vessel stent with adjustable neck two-branch positions according to claim 1, characterized in that: A flange seal (23) is provided on one side of the branch metal bracket (21).

3. The large blood vessel stent with adjustable neck two-branch positions according to claim 1, characterized in that: The main metal support (11) and the branch metal support (21) are both made of a magnesium alloy as a base, mixed with polylactic acid and polycaprolactone.

4. The large blood vessel stent with adjustable neck two-branch positions according to claim 1, characterized in that: The main stent coating (12) and the branch stent coating (22) are both made of polytetrafluoroethylene, dacron, polyester or polyurethane as main materials.

5. The large blood vessel stent with adjustable neck two-branch positions according to claim 1, characterized in that: The size ratio of the main metal support (11) to the branch metal support (21) is 3.75:

1.

6. The large blood vessel stent with adjustable neck two-branch positions according to claim 1, characterized in that: The positions of the three preset holes (13) can be adjusted. The central hole among the three preset holes (13) is used to fix the left common carotid artery, and the holes on both sides of the three preset holes (13) can be adjusted according to the positions of the innominate artery and the left subclavian artery. The corresponding position adjustment can be made by bending the main covered stent (10), or the corresponding position can be pre-opened when opening the hole.

7. A method for using a large blood vessel stent with adjustable neck two-branch positions, characterized in that: The following steps are involved: S1, installing the main body stent graft (10), installing the main body stent graft (10) by using a main body conveyor, opening the interlayer, and completely fixing the position of the main body stent graft (10) and the blood vessel; S2, installing the branch stent graft (20), and installing the branch stent graft (20) through a branch conveyor; S3, guidewire superselection, during which the extra cavity generated between the blood vessel wall and the recessed portion (14) increases the space for guidewire superselection; S4, releasing the stent, completely releasing the main stent graft (10) and the branch stent graft (20).

8. The method for using the large blood vessel stent with adjustable neck two-branch positions according to claim 7, characterized in that: In the above-mentioned S2, the flange seal (23) of the branch stent graft (20) is used in a semi-released state to pull up the recessed portion (14) of the main stent graft (10) until it is attached to the greater bend, while effectively avoiding internal leakage.

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