Telescopic blood vessel covered stent

Abstract

The invention discloses a telescopic blood vessel covered stent, and relates to the technical field of medical instruments, the telescopic blood vessel covered stent comprises a left stent, a right stent, a middle stent, a main shaft, a conical nut, a hook, a circular ring, a connecting block, a sliding block, a key, a hexagon bolt and a spring, the left stent, the right stent, the conical nut, the hook, the circular ring, the key and the spring are all mounted on the main shaft; the left support and the right support are connected to the main shaft through hexagon bolts, the hook and the circular ring are provided with threads and matched with the conical nut to be fixed to the main shaft, the middle support and the connecting block are connected to the main shaft through bolts, the sliding block can move along an I-shaped sliding rail on the main shaft, and the spring is arranged below the key. According to the device, radial and axial adjustment can be carried out according to changes of the thickness of blood vessels of a user and the length of a lesion, operation is convenient, and functional feasibility is high.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and specifically to a retractable vascular covered stent. Background Art

[0002] Cardiovascular disease is one of the leading causes of death worldwide. In the 1980s, with the development of technology, angioplasty became a minimally invasive option for the treatment of vascular stenosis. Implanting an internal stent in the lesion segment can support the narrowed and occluded segment of the blood vessel, reduce the elastic retraction and reshaping of the blood vessel, and maintain smooth blood flow in the lumen. Today's vascular stents have been perfected in terms of flexibility, support, compatibility and durability. However, in clinical practice, there are some cases where the diameter and length of the stent are insufficient due to blood vessel growth, which affects the dredging effect. To this end, the present invention provides a retractable vascular covered stent that can be adjusted radially and axially according to changes in the thickness of the user's blood vessels and the length of the lesion. Summary of the invention

[0003] The object of the present invention is to provide a retractable vascular covered stent to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a retractable vascular covered stent, comprising left and right brackets, a middle bracket, a main shaft, a conical nut, a hook, a ring, a connecting block, a slider, a button, a hexagonal bolt and a spring, the left and right brackets, the conical nut, the hook, the ring, the button and the spring are all installed on the main shaft, the left and right brackets are connected to the main shaft by hexagonal bolts, the hook and the ring are both threaded, and are fixed to the main shaft in cooperation with the conical nut, the middle bracket and the connecting block are connected to the main shaft by bolts, the slider can move along the I-shaped slide rail on the main shaft, the button has a spring under it, and the two ends of the spring are respectively bonded to the grooves of the button and the main shaft.

[0005] Preferably, the left and right brackets have a smaller diameter than the middle bracket and are respectively nested in the middle bracket, and are connected to the slider via the connecting block. The left and right brackets are fixed on the main shaft so that the middle bracket and the left and right brackets can move relative to each other.

[0006] Preferably, the upper end of the button is an inclined surface, and when the slider moves along the inclined surface, the button will be pressed to move downward and compress the spring to allow the slider to pass;

[0007] When the slider passes the button, the button rebounds upward to the initial state due to the elastic force of the spring, and at the same time fixes the position of the slider to form a self-locking state.

[0008] Preferably, the left and right brackets and the middle bracket are all made of elastic materials and can complete deformation in the radial direction.

[0009] Preferably, the hooks and the rings are distributed in pairs on both sides of the main axis. In the initial case, the diameter of the vascular stent is required to be small, so each hook is hung on the corresponding ring;

[0010] At the same time, use thin wires on the left and right sides to intersperse between the hook and the ring;

[0011] When the diameter of the vascular stent needs to be expanded, remove the hook, tighten the thin wire and tie a knot as needed to achieve multi-level adjustment of the diameter of the vascular stent.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention can be adjusted radially and axially according to changes in the thickness of the user's blood vessels and the length of the lesions. It is easy to operate and has strong functional feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the structure diagram of the mechanism of the present invention;

[0015] Figure 2 It is a cross-sectional view of the mechanism of the present invention;

[0016] Figure 3 This is a schematic diagram of the connection between the main shaft and the left and right brackets;

[0017] Figure 4 This is a schematic diagram of the cooperation between the main shaft I-shaped guide rail and the slider;

[0018] Figure 5 It is a schematic diagram of the spring button mechanism;

[0019] Figure 6 It is a schematic diagram of the installation of the hook, the ring and the conical nut respectively.

[0020] In the figure: 1-left and right brackets; 2-middle bracket; 3-spindle; 4-conical nut; 5-hook; 6-ring; 7-connecting block; 8-slider; 9-button; 10-hexagonal bolt; 11-spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 6The present invention provides a technical solution: a retractable vascular covered stent, including left and right stents 1, a middle stent 2, a main shaft 3, a conical nut 4, a round hook 5, a ring 6, a connecting block 7, a slider 8, a button 9, a hexagonal bolt 10 and a spring 11.

[0023] In this embodiment, the left and right brackets 1, the conical nut 4, the hook 5, the ring 6, the button 9 and the spring 11 are all installed on the main shaft 3. The left and right brackets 1 are connected to the main shaft 3 by hexagonal bolts 10. The hook 5 and the ring 6 are both threaded and fixed to the main shaft 3 in cooperation with the conical nut 4. The middle bracket 2 and the connecting block 7 are connected to the main shaft 3 by bolts. The slider 8 can move along the I-shaped slide rail on the main shaft. The button 9 has a spring under it, and the two ends of the spring are respectively bonded to the grooves of the button 9 and the main shaft 3.

[0024] In this embodiment, the diameter of the left and right brackets 1 is slightly smaller than that of the middle bracket 2, and they are respectively nested in the middle bracket 2 and connected to the slider through the connecting block 7. The left and right brackets 1 are fixed on the main shaft 3, so that the middle bracket 2 and the left and right brackets 1 can move relative to each other, realizing the axial telescopic transformation of the brackets.

[0025] In this embodiment, the upper end of the button 9 is an inclined surface. When the slider 8 moves along the inclined surface, the button 9 will be pressed downward and compress the spring 11, so that the slider 8 can pass. After the slider 8 passes through the button, the button 9 rebounds upward to the initial state due to the elastic force of the spring 11, and the position of the slider is fixed at the same time, forming a self-locking. The button self-locking mechanism as described above is respectively provided on the left and right sides of the four main shafts 3, so that the slider 8 drives the left and right brackets 1 to be fixed on both sides after the extension and contraction.

[0026] In this embodiment, the left and right brackets 1 and the middle bracket 2 are all made of elastic materials, which can complete deformation in the radial direction to achieve the change of the diameter of the vascular stent. The hooks 5 and the rings 6 are distributed in pairs on both sides of the main shaft 3. In the initial case, the diameter of the vascular stent is required to be small, so each hook 5 is hung on the corresponding ring 6. At the same time, thin wires are used on the left and right sides to be inserted between the hooks 5 and the rings 6 in a shoelace-like manner. When the user needs to expand the diameter of the vascular stent, the hook 5 is removed, the thin wire is tightened and knotted as required, and the multi-level adjustment of the diameter of the vascular stent is achieved.

[0027] Working principle: The expansion and contraction can be adjusted in two directions, radial and axial, according to user needs. The vascular stent is composed of left and right stents 1 and middle stent 2. The axial direction is guided and limited by the slide rail. The limit function is mainly realized by the spring 11 and the button 9 device.

[0028] When the length needs to be extended, the slider 8 moves along the inclined surface and presses down the spring 11, and after the button 9 is pressed, the spring 11 pops up to form a self-locking state.

[0029] When the length needs to be shortened, the button 9 can be manually pressed to move the slider 8 to the spring 11 button device on the other side for limiting.

[0030] The elasticity of the stent material is utilized to move in the radial direction to change the diameter of the entire stent. Several hooks 5 and rings 6 are arranged on both sides of the main shaft 3 of the stent. Silk threads are inserted between the hooks 5 and the rings 6 in a shoelace-like manner. When the diameter needs to be reduced, the silk threads can be tightened to close the main shafts 3 on both sides, and finally the hooks 5 are hung on the rings 6 to stabilize the positioning. When the diameter needs to be expanded, a part of the silk threads can be released as needed, and when the diameter is expanded to the position required by the user, the silk threads can be knotted.

[0031] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A retractable vascular covered stent, characterized in that: The invention comprises left and right brackets (1), a middle bracket (2), a main shaft (3), a conical nut (4), a hook (5), a ring (6), a connecting block (7), a slider (8), a button (9), a hexagonal bolt (10) and a spring (11). The left and right brackets (1), the conical nut (4), the hook (5), the ring (6), the button (9) and the spring (11) are all installed on the main shaft (3). The left and right brackets (1) are connected to the main shaft (3) through the hexagonal bolt (10). The hook (5) and the ring (6) are both threaded and matched with the conical nut (4) to be fixed on the main shaft (3). The middle bracket (2) and the connecting block (7) are connected to the main shaft (3) through bolts. The slider (8) can move along an I-shaped slide rail on the main shaft. A spring (11) is arranged under the button (9). Two ends of the spring (11) are respectively bonded to the grooves of the button (9) and the main shaft (3).

2. The retractable vascular covered stent according to claim 1, characterized in that: The left and right brackets (1) have a smaller diameter than the middle bracket (2) and are respectively nested in the middle bracket (2). They are connected to the slider (8) via the connecting block (7). The left and right brackets (1) are fixed on the main shaft (3) so that the middle bracket (2) and the left and right brackets (1) can move relative to each other.

3. The retractable vascular covered stent according to claim 1, characterized in that: The upper end of the button (9) is an inclined surface. When the slider (8) moves along the inclined surface, the button (9) is pressed to move downward and compress the spring (11) to enable the slider (8) to pass through. When the slider (8) passes the button, the button (9) rebounds upward to the initial state due to the elastic force of the spring (11), and at the same time fixes the position of the slider to form a self-locking state.

4. The retractable vascular covered stent according to claim 1, characterized in that: The left and right brackets (1) and the middle bracket (2) are all made of elastic materials and are capable of completing deformation in the radial direction.

5. The retractable vascular covered stent according to claim 1, characterized in that: The hooks (5) and the rings (6) are distributed in pairs on both sides of the main axis (3). In the initial case, the diameter of the vascular stent is required to be small, so each hook (5) is hung on the corresponding ring (6); At the same time, thin wires are used to intersperse between the hook (5) and the ring (6) on the left and right sides; When the diameter of the vascular stent needs to be enlarged, the hook (5) is removed, and the thin wire is tightened and knotted as required, thereby achieving multi-level adjustment of the diameter of the vascular stent.

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