Drug coating intravascular stent

Abstract

The utility model discloses a drug coating intravascular stent, which belongs to the technical field of intravascular stents and comprises a support column, a sleeve is slidably connected to the outer surface of the support column, four support plates are arranged on the outer side of the sleeve, and the outer surfaces of the four support plates are jointly and fixedly connected with a support sleeve. The side face, close to the sleeve, of each supporting plate is fixedly connected with two second fixing blocks, driving rods are movably hinged to the inner walls of the four second fixing blocks, and four driven rods are movably hinged to the inner walls of the other four second fixing blocks. According to the drug coating intravascular stent, by arranging the first fixing block, the second fixing block, the sleeve, the driving rod, the driven rod and the supporting plate, the first fixing block and the driving rod can be driven to move when the sleeve moves under the action of the sleeve, and the supporting rod and the driven rod are driven to ascend under the action of movement of the driving rod; therefore, the supporting sleeve and the coating can be supported, and the movement distance of the sleeve is controlled.

Description

Technical Field

[0001] The present application belongs to the technical field of vascular stents, and in particular, relates to a drug-coated intravascular stent. Background Art

[0002] A vascular stent is a stent placed in the diseased segment on the basis of luminal balloon dilatation to support the narrowed and occluded segment of the blood vessel, reduce vascular elastic retraction and reshaping, and maintain smooth blood flow in the lumen. Some stents also have the function of preventing restenosis.

[0003] The utility model with the existing authorization announcement number CN215459015U discloses a drug-coated intravascular stent, including a catheter, one end of which is plugged with a fixing column, the outer wall of which is fixedly installed with a supporting assembly, the outer wall of which is rotatably connected to a support plate through the supporting assembly, and the outer wall of the support plate is sleeved with a jacket; when setting the drug-coated intravascular stent, the fixing column is moved to the desired position through the catheter, and then the supporting assembly is used in conjunction with the positioning assembly to enable the supporting assembly to achieve the function of fixing the support plate position.

[0004] By adopting the above technical scheme, the position of the support assembly is stabilized by the positioning assembly, so that the support assembly maintains the position of the support plate, thereby achieving the effect of supporting the blood vessel for a long time, and the support plate is connected as a whole through the outer sleeve to avoid cutting the inner wall of the blood vessel at the edge of the support plate. Through the simple supporting structure of the support assembly, the support assembly supports sufficient space between the support plate and the fixed column to avoid affecting the blood circulation. However, when the above technical scheme is used to widen the patient's blood vessels, it is difficult for the staff to adjust the support height of the stent according to the optimal treatment width, which may easily result in a certain deviation in the expansion height of the blood vessel, which may easily affect the treatment effect of the patient, and further lead to the problem of low practicality.

[0005] Therefore, we propose a drug-coated intravascular stent to solve the above problems. Utility Model Content

[0006] The purpose of the present application is to solve the problem in the prior art that the support height of the stent cannot be accurately adjusted as needed when widening and expanding the patient's blood vessels, and to propose a drug-coated intravascular stent.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A drug-coated intravascular stent comprises a support column, the outer surface of which is slidably connected to a sleeve, four support plates are arranged on the outer side of the sleeve, the outer surfaces of the four support plates are commonly fixedly connected to a support sleeve, and each of the support plates is fixedly connected to a side surface close to the sleeve with two second fixed blocks, wherein the inner walls of the four second fixed blocks are movably hinged with active rods, and the inner walls of the other four second fixed blocks are movably hinged with four driven rods, the outer surface of each driven rod is movably hinged with the inner wall of the active rod, and the inner wall of each active rod and the inner wall of the driven rod are movably hinged with a first fixed block, wherein the side surfaces of two groups of the first fixed blocks close to each other are fixedly connected to the outer surface of the sleeve, and the side surfaces of the other two groups of the first fixed blocks close to each other are fixedly connected to the outer surface of the support column, and the back side of the support column is fixedly connected to a forward and reverse motor, the output end of the forward and reverse motor power is fixedly connected to a threaded rod, the outer surface of the threaded rod is threadedly connected with a moving block, and the back side of the moving block is fixedly connected to the inner wall of the sleeve.

[0009] Preferably, a coating is fixedly connected to the outer surface of the support sleeve, and four groups of drug outlet tubes are fixedly connected to the inner wall of the coating.

[0010] Preferably, one end of each group of the drug outlet pipes close to the support plate passes through the support sleeve and extends to the inside of the support plate, and a drug storage groove is provided on the inner wall of each support plate.

[0011] Preferably, four slide grooves are provided on the outer surface of the support column, and a conduit is fixedly connected to the front side of the support column.

[0012] Preferably, a battery is fixedly connected to the inner wall of the support column, and the battery is electrically connected to the forward and reverse motor via a wire.

[0013] Preferably, a protective cover is provided on the outer side of the battery, and the front side of the protective cover is fixedly connected to the inner wall of the support column.

[0014] Preferably, a protective cover is fixedly connected to the outer surface of the forward and reverse motor, and the front side of the protective cover is fixedly connected to the back side of the support column.

[0015] Preferably, the inner wall of each slide groove is slidably connected with a slider, and the side faces of each group of sliders that are away from each other are fixedly connected to the inner wall of the sleeve.

[0016] In summary, the technical effects and advantages of this application are:

[0017] 1. By setting the first fixed block, the second fixed block, the sleeve, the active rod, the driven rod and the support plate, the sleeve can drive the first fixed block and the active rod to move when the sleeve moves. Under the action of the active rod moving, the driving support rod and the driven rod are raised, so that the support sleeve and the coating can be propped up. Under the control of the sleeve moving distance, the height of the blood vessel can be accurately controlled, which effectively reduces the situation of large deviation of the support height caused by the difficulty in controlling the stent support;

[0018] 2. By setting up a forward and reverse motor, a threaded rod and a moving block, the forward and reverse motor can provide the power required for movement and adjustment. The rotation of the forward and reverse motor can drive the threaded rod to rotate. Under the action of the rotation of the threaded rod, the moving block and the sleeve will be driven to move, thereby quickly driving the device to support blood vessel widening and improve the accuracy of device control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the coating of the utility model;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the coating of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the support plate of the utility model in a three-dimensional cutaway view;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the sleeve of the utility model in cross section.

[0023] In the figure: 1. support column; 2. catheter; 3. support sleeve; 4. coating; 5. sleeve; 6. support plate; 7. second fixed block; 8. first fixed block; 9. active rod; 10. driven rod; 11. medicine outlet pipe; 12. medicine storage tank; 13. forward and reverse motor; 14. threaded rod; 15. moving block; 16. protective cover; 17. slider; 18. battery; 19. protective cover; 20. slide groove. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figure 1-4A drug-coated intravascular stent comprises a support column 1, the outer surface of the support column 1 is slidably connected to a sleeve 5, four support plates 6 are arranged on the outer side of the sleeve 5, the outer surfaces of the four support plates 6 are commonly fixedly connected to a support sleeve 3, the outer surface of the support sleeve 3 is fixedly connected to a coating 4, and the inner wall of the coating 4 is fixedly connected to four groups of drug outlet tubes 11. By arranging the coating 4 and the drug outlet tubes 11, it is possible to facilitate the delivery of drugs to the patient's blood, thereby improving the therapeutic effect of the device.

[0026] Two second fixed blocks 7 are fixedly connected to one side of each support plate 6 close to the sleeve 5, and one end of each group of medicine outlet tubes 11 close to the support plate 6 passes through the support sleeve 3 and extends to the inside of the support plate 6. A medicine storage groove 12 is provided on the inner wall of each support plate 6. By providing the medicine storage groove 12, it is convenient for the staff to add the corresponding therapeutic drugs into the medicine storage groove 12, thereby facilitating the treatment of the patient.

[0027] The inner walls of the four second fixed blocks 7 are all movably hinged with active rods 9, and the inner walls of the other four second fixed blocks 7 are all movably hinged with four driven rods 10. The outer surface of the support column 1 is provided with four slide grooves 20, and the front of the support column 1 is fixedly connected with a conduit 2. By setting the slide groove 20, a platform for limiting the movement of the sleeve 5 can be provided, thereby avoiding position displacement. By setting the conduit 2, it is convenient for the staff to install and pick up the entire device, thereby improving the work efficiency of the staff.

[0028] The outer surface of each driven rod 10 is movably hinged to the inner wall of the active rod 9, and the inner wall of each active rod 9 and the inner wall of the driven rod 10 are movably hinged with a first fixed block 8. The inner wall of the support column 1 is fixedly connected with a battery 18, and the battery 18 is electrically connected to the forward and reverse motor 13 through a wire. By setting up the battery 18, the forward and reverse motor 13 can be provided with the power required for operation, so that it can work stably.

[0029] The side surfaces of the two groups of first fixing blocks 8 that are close to each other are fixedly connected to the outer surface of the sleeve 5. A protective cover 19 is provided on the outer side of the battery 18. The front side of the protective cover 19 is fixedly connected to the inner wall of the support column 1. By providing the protective cover 19, the battery 18 can be well protected to avoid damage to the battery 18.

[0030] The side surfaces of the other two groups of first fixed blocks 8 that are close to each other are fixedly connected to the outer surface of the support column 1, and the back side of the support column 1 is fixedly connected to a forward and reverse motor 13, and the output end of the power of the forward and reverse motor 13 is fixedly connected to a threaded rod 14, and the outer surface of the forward and reverse motor 13 is fixedly connected to a protective cover 16, and the front side of the protective cover 16 is fixedly connected to the back side of the support column 1. By setting the protective cover 16, the stability effect of the forward and reverse motor 13 during operation can be further increased, and at the same time, it can also provide a certain protection for the motor.

[0031] The outer surface of the threaded rod 14 is threadedly connected to a moving block 15, and the back of the moving block 15 is fixedly connected to the inner wall of the sleeve 5. The inner wall of each slide groove 20 is slidably connected to a slider 17, and the side of each group of sliders 17 that are away from each other are fixedly connected to the inner wall of the sleeve 5. By providing the slider 17, the stability of the sleeve 5 during movement can be further increased to prevent rotation during movement.

[0032] The working principle of the utility model is as follows: when in use, the staff first brings the device to a suitable use position, then connects the power supply of the storage battery 18 and the forward and reverse motor 13, so that it can be in a stable power-on state to avoid power failure during use, and then the staff adds an appropriate amount of suitable medicine to the medicine storage tank 12. When the stent needs to be used to widen the blood vessel, the staff first turns on the forward and reverse motor 13, and the forward and reverse motor 13 starts to generate power rotation after being turned on. The rotation of the forward and reverse motor 13 can drive the threaded rod 14 to rotate, so that under the action of the rotation of the threaded rod 14, the moving block 15 will be driven to move its position. The process of the moving block 15 moving The sleeve 5 and the first fixed block 8 can be driven to move. When the first fixed block 8 moves, it can drive the active rod 9 to rise. The active rod 9 can generate an upward impulse during the rising process. Under the action of the impulse, the support plate 6 and the driven rod 10 will be driven to rise. When the four support plates 6 are unfolded, the support sleeve 3 and the blood vessel will be stretched open until the blood vessel is widened to a suitable position according to treatment needs, so as to avoid the widening height deviation being too large and affecting the patient's treatment. After adjusting to the appropriate position, the staff can turn off the forward and reverse motors 13. At the same time, the medicine inside the medicine storage tank 12 will evaporate upward through the medicine outlet pipe 11 and be transmitted to the patient's blood vessel through the coating 4 for treatment.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] 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. A drug-coated intravascular stent, comprising a support column (1), characterized in that: The outer surface of the support column (1) is slidably connected to a sleeve (5), and four support plates (6) are arranged on the outer side of the sleeve (5). The outer surfaces of the four support plates (6) are fixedly connected to a support sleeve (3). Each of the support plates (6) is fixedly connected to two second fixed blocks (7) on a side close to the sleeve (5), wherein the inner walls of the four second fixed blocks (7) are movably hinged to active rods (9), and the inner walls of the other four second fixed blocks (7) are movably hinged to four driven rods (10), and the outer surface of each driven rod (10) is movably hinged to the inner wall of the active rod (9). ) and the inner wall of the driven rod (10) are both movably hinged with a first fixed block (8), wherein the side surfaces of two groups of the first fixed blocks (8) close to each other are fixedly connected to the outer surface of the sleeve (5), and the side surfaces of the other two groups of the first fixed blocks (8) close to each other are fixedly connected to the outer surface of the support column (1), the back side of the support column (1) is fixedly connected to a forward and reverse motor (13), the output end of the power of the forward and reverse motor (13) is fixedly connected to a threaded rod (14), the outer surface of the threaded rod (14) is threadedly connected to a moving block (15), and the back side of the moving block (15) is fixedly connected to the inner wall of the sleeve (5).

2. The drug-coated intravascular stent according to claim 1, characterized in that: The outer surface of the support sleeve (3) is fixedly connected with a coating (4), and the inner wall of the coating (4) is fixedly connected with four groups of drug outlet tubes (11).

3. The drug-coated intravascular stent according to claim 2, characterized in that: One end of each group of the medicine outlet pipes (11) close to the support plate (6) passes through the support sleeve (3) and extends to the inside of the support plate (6), and a medicine storage groove (12) is provided on the inner wall of each support plate (6).

4. The drug-coated intravascular stent according to claim 1, characterized in that: Four sliding grooves (20) are provided on the outer surface of the support column (1), and a guide tube (2) is fixedly connected to the front side of the support column (1).

5. The drug-coated intravascular stent according to claim 1, characterized in that: A storage battery (18) is fixedly connected to the inner wall of the support column (1), and the storage battery (18) is electrically connected to the forward and reverse motor (13) via a wire.

6. The drug-coated intravascular stent according to claim 5, characterized in that: A protective cover (19) is provided on the outside of the storage battery (18), and the front side of the protective cover (19) is fixedly connected to the inner wall of the support column (1).

7. The drug-coated intravascular stent according to claim 1, characterized in that: A protective cover (16) is fixedly connected to the outer surface of the forward and reverse motor (13), and the front side of the protective cover (16) is fixedly connected to the back side of the support column (1).

8. The drug-coated intravascular stent according to claim 4, characterized in that: The inner wall of each slide groove (20) is slidably connected to a slider (17), and the side faces of each group of sliders (17) that are away from each other are fixedly connected to the inner wall of the sleeve (5).

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