Heart double-stent capable of being released once and conveying and releasing system of heart double-stent

Abstract

The invention discloses a heart double stent capable of being released once, which comprises a main stent, and the lower end of the main stent is connected with a branch stent and a side stent; when the main support, the branch supports and the side supports are in a compressed state, the outer diameter of the branch supports is smaller than that of the main support. Through the ingenious design of double stents, especially the main stent, the branch stent and the side stent which are integrally connected with the main stent, and in cooperation with double-guide-wire conveying, conveying and releasing of the heart double stents of a main branch tube aiming at a main branch blood vessel and a side branch tube aiming at a side branch blood vessel can be achieved at a time; the possibility that the structure of the stent is damaged due to secondary conveying is avoided, and the success rate of a bifurcation lesion implantation double-stent operation is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a single-releaseable double-heart stent and a delivery and release system thereof. Background Art

[0002] When treating dynamic coronary bifurcation lesions, stents may need to be implanted in both the main and side branches. Current stent implantation procedures for bifurcation lesions typically involve first implanting a stent in the main branch and then in the side branch. However, when the second stent is placed in the side branch, the structure of the first stent is easily damaged, leading to surgical failure. Therefore, it is necessary to improve existing technologies and provide a solution that can be delivered and released in one go, allowing for implantation in both the main and side branches. Summary of the Invention

[0003] Therefore, based on the above background, the present invention provides a cardiac double stent that can be released in a single time and its delivery and release system. The present invention uses an ingenious double-stent structure and cooperates with double guidewire delivery to deliver and release double stents for the main branch blood vessel and the side branch blood vessel respectively in a single time, avoiding the possibility of damage to the stent structure and improving the success rate of double-stent implantation surgery for bifurcation lesions.

[0004] The technical solution provided by the present invention is: A single-release dual-stent cardiac stent comprises a main branch stent, the main branch stent being a hollow tube with a mesh-like wall and capable of radially deforming between an expanded state and a compressed state, the lower end of the main branch stent being connected to a branch stent and a side branch stent; The sub-stent is a hollow tube with a mesh wall, which can be radially deformed between an expanded state and a compressed state; The side branch stent is a hollow tube with a mesh wall, which can be radially deformed between an expanded state and a compressed state; When the main branch stent, the sub-stent and the side branch stent are in a compressed state, the inner diameters of the sub-stent and the side branch stent are smaller than the inner diameter of the main branch stent.

[0005] One implementation method is that the tube walls of the main support, sub-support and side support are all composed of U-shaped wave-shaped corrugated rods and connecting rods connecting the upper and lower wave-shaped rods.

[0006] One implementation method is that the sub-bracket and the side-bracket are respectively connected to the main-bracket via connecting rods.

[0007] One implementation method is that the length of the branch stent or the side branch stent is 1-3 times that of the main branch stent.

[0008] One implementation method is that when the main branch stent, sub-stent and side branch stent are in a compressed state, the inner diameter of the sub-stent or side stent is 1 / 3-1 / 2 of the inner diameter of the main branch stent.

[0009] Based on the same inventive concept, the present invention also provides a cardiac dual-stent delivery and release system, which includes the single-release dual-stent system.

[0010] Furthermore, the cardiac dual-stent delivery and deployment system further includes: a first guidewire, the first guidewire being used to deliver the main branch stent and the side branch stent; the first guidewire being provided with a first balloon for expanding the main branch stent and the side branch stent; a second guidewire, the second guidewire being used to deliver the main branch stent and the sub-stent, and the second guidewire being provided with a second balloon for expanding the main branch stent and the sub-stent; Guidewire catheter, used to guide the main stent, branch stent and side branch stent.

[0011] The above technical solution has the following beneficial effects: The present invention uses an ingenious double-stent design, especially the main-branch stent, and the structure of the sub-stent and side-branch stent integrally connected to the main-branch stent, in conjunction with double-guidewire delivery, to achieve single-time delivery and release of double stents for the main branch of the main blood vessel and the side branch of the side blood vessel, avoiding the possibility of damage to the stent structure caused by secondary delivery and improving the success rate of double-stent implantation surgery for bifurcation lesions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a schematic diagram of the double-stent structure of the heart of the present invention.

[0014] Figure 2 It is a structural schematic diagram of the main support bracket of the present invention.

[0015] Figure 3 This is a schematic structural diagram of the main support of the present invention in a hypothetical flat-laid out state.

[0016] Figure 4 Schematic diagram of the structure of the first guide wire of the present invention.

[0017] Figure 5 For reference to the use process of this invention Figure 1(The mesh shapes of the brackets are not drawn).

[0018] Figure 6 For reference to the use process of this invention Figure 2 (The mesh shapes of the brackets are not drawn).

[0019] Figure 7 For reference to the use process of this invention Figure 3 (The mesh shapes of the brackets are not drawn). DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In the description of the present invention, references to "first feature" and "second feature" may include one or more of these features. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features being described. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of these features.

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Example 1: According to Figures 1 to 7 The single-release double heart stent shown in FIG. 1 includes a main branch stent 1, wherein the main branch stent 1 is a hollow tube with a mesh wall and can be radially deformed between an expanded state and a compressed state. Figure 1 As shown, the lower end of the main branch stent 1 is connected to a sub-branch 2 and a side branch stent 3; the sub-branch 2 is a hollow tube with a mesh wall, which can be radially deformed between an expanded state and a compressed state; The side support 3 is a hollow tube with a mesh wall, which can be radially deformed between an expanded state and a compressed state; According to actual clinical application results, when the main branch stent 1 , the sub-stent 2 and the side branch stent 3 are in a compressed state, the inner diameters of the sub-stent 2 and the side branch stent 3 are smaller than the inner diameter of the main branch stent 1 .

[0025] The tube walls of the main support 1, the sub-support 2 and the side support 3 are all composed of U-shaped wave-shaped corrugated rods 4 and connecting rods 5 connecting the upper and lower wave-shaped rods 4, so as to achieve radial deformation between the expanded state and the compressed state.

[0026] The main support bracket 1 and the branch support 3, and the main support bracket 1 and the side support bracket 3 are connected by a connecting rod 5. Specifically, the corrugated rod 4 and the connecting rod can be connected by welding or made into one piece.

[0027] According to actual clinical application, preferably, the upper and lower lengths of the sub-branch 2 or side-branch 3 are 1-3 times that of the main-branch 1 , and preferably, the upper and lower lengths of the sub-branch 2 or side-branch 3 are 2 times that of the main-branch 1 .

[0028] Example 2: According to Figures 1 to 7 A cardiac dual-stent delivery and release system is shown, which includes the single-release dual stent described in Example 1.

[0029] Specifically, the cardiac dual-stent delivery and deployment system also includes: A first guide wire 6 is used to deliver the main branch stent 1 and the side branch stent 3 ; a first balloon 61 is provided on the first guide wire 6 for expanding the main branch stent 1 and the side branch stent 3 ; A second guide wire 7, which is used to deliver the main branch stent 1 and the sub-stent 2. The second guide wire 7 is provided with a second balloon 71 for expanding the main branch stent 1 and the sub-stent 2; The guidewire catheter 8 is used to guide the main stent 1, the sub-stent 2, and the side branch stent 3.

[0030] Furthermore, the first guide wire and the second guide wire have the same structure. Figure 4 As shown, the first guide wire 6 is further provided with a trachea 62 connected to the first balloon 61, through which the first balloon is inflated and deflated. This is a conventional structure and will not be described in detail here.

[0031] In a specific implementation, the length of the first balloon is greater than the sum of the lengths of the main branch stent and the side branch stent; the length of the second balloon is greater than the sum of the lengths of the main branch stent and the side branch stent; In a specific implementation, the main support 1, the sub-support 2, and the side support 3 are respectively made of nickel-titanium alloy.

[0032] When the present invention implants a stent into a bifurcation lesion, the implantation process is as follows: Figures 5 to 7 : At the same time, the guidewire catheter 8 is inserted through the first guidewire and the second guidewire, and then the double stent is delivered to the junction of the main branch vessel 9 and the side branch vessel 100 (branch opening) through the guidewire catheter 8. At this time, the first guidewire 6 partially enters the side branch vessel 100, and the double stent is continued to be delivered simultaneously through the first guidewire 6 and the second guidewire 7 until the side branch stent 3 enters the side branch vessel along the first guidewire 6 (as shown in FIG. Figure 5 As shown), continue to deliver the double heart stents until all the side branch stents 3 are delivered to the side branch vessel 100, then inflate the first balloon 61, inflate the main branch stent 1 and the side branch stent 3 until the side branch stent 3 is attached to the side branch vessel wall (as shown). Figure 6 As shown), after releasing the gas in the first balloon 61, the second balloon 71 is inflated to expand the main branch stent 1 and the branch stent 2 until the branch stent 2 is in contact with the main branch vessel wall. After releasing the second balloon, the catheter and its first and second guide wires are withdrawn to achieve a single release of two stents.

[0033] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A single-release double-stent heart stent, comprising a main branch stent (1), wherein the main branch stent (1) is a hollow tube with a mesh wall, capable of radially deforming between an expanded state and a compressed state, and characterized in that: The lower end of the main support bracket (1) is connected to a sub-branch (2) and a side support bracket (3); The sub-stent (2) is a hollow tube with a mesh-like wall, capable of radially deforming between an expanded state and a compressed state; The side support (3) is a hollow tube with a mesh-like wall, capable of radially deforming between an expanded state and a compressed state; When the main support bracket (1), the sub-branch (2) and the side support bracket (3) are all in a compressed state, the inner diameters of the sub-branch (2) and the side support bracket (3) are smaller than the inner diameter of the main support bracket (1).

2. The single-release double heart stent according to claim 1, characterized in that: The tube walls of the main support bracket (1), the sub-branch (2) and the side support bracket (3) are all composed of a corrugated rod (4) and a connecting rod (5); the corrugated rod (4) is U-shaped and wavy, and the connecting rod is located between the upper and lower corrugated rods (4).

3. The single-release double heart stent according to claim 2, characterized in that: The sub-bracket (4) and the side-bracket (3) are respectively connected to the main-bracket (1) via connecting rods (5).

4. The single-release double heart stent according to claim 1, characterized in that: The length of the sub-branch (2) or the side branch bracket (3) is 1-3 times that of the main branch bracket (1).

5. The single-release double heart stent according to claim 1, characterized in that: When the main support stent (1), the sub-support stent (2) and the side support stent (3) are all in a compressed state, the inner diameter of the sub-support stent (2) or the side support stent (3) is 1 / 3 to 1 / 2 of the inner diameter of the main support stent (1).

6. A cardiac dual-stent delivery and release system, characterized in that: The invention comprises the single-release double heart stent according to any one of claims 1 to 4.

7. A cardiac dual-stent delivery and release system according to claim 6, characterized in that: Also includes: A first guide wire (6), the first guide wire (6) being used to transport the main branch stent (1) and the side branch stent (3); a first balloon (61) being provided on the first guide wire (6) for expanding the main branch stent (1) and the side branch stent (3); A second guide wire (7), the second guide wire (7) being used to transport the main branch stent (1) and the sub-stent (2), and the second guide wire (7) being provided with a second balloon (71) for expanding the main branch stent (1) and the sub-stent (2); The guidewire catheter (8) is used to guide the main branch stent (1), the sub-stent (2) and the side branch stent (3).

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