Novel anti-off-load coronary stent protection device

Abstract

The utility model relates to the field of medical instruments, and discloses a novel anti-drop coronary stent protection device which comprises a guide wire and a net rack, a balloon is fixedly arranged at the outer end of the guide wire, a supporting frame is fixedly arranged at the outer end of the net rack, a plurality of clamping blocks are fixedly arranged at the two ends of the supporting frame, and anti-drop mechanisms are movably arranged at the two ends of the supporting frame. According to the utility model, when the net rack and the support frame are positioned in a blood vessel, the two magnesium-based alloys of the first layer have good compatibility with human tissues, inflammatory response can be effectively reduced, the risk of thrombosis can be reduced, and the polyglycolic acid of the second layer and the polylactic acid of the third layer can be used as drug release carriers, so that after the stent is implanted, the drug release can be effectively released. The anti-off-loading support ring has the advantages that anti-inflammatory and anti-hyperplasia drugs are slowly released, the risk of restenosis is further reduced, the anti-off-loading support ring can be taken out from a blood vessel together with the balloon after the balloon releases part of air, stimulation to endangium is reduced, and the risk of thrombosis is reduced at the same time.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a novel anti-detachment coronary stent protection device. Background Technology

[0002] Coronary artery disease (CAD) is a condition caused by narrowing or blockage of the coronary arteries, leading to myocardial ischemia. Its main causes include atherosclerosis and thrombosis, which narrow or completely block the blood vessels, restricting the heart muscle's access to sufficient oxygen and nutrients. This can result in a series of serious cardiovascular events, such as angina, myocardial infarction, and even heart failure. Coronary stents can be used to open narrowed or blocked coronary arteries, significantly improving blood flow, relieving angina symptoms, reducing damage caused by myocardial ischemia, and thus reducing the risk of myocardial infarction. However, stents can dislodge or migrate during implantation. To ensure the stent is fixed in the correct position and achieves its intended therapeutic effect, anti-dislodgement devices are crucial. These devices effectively reduce the risk of stent dislodgement or migration, providing patients with a safer and more effective treatment experience.

[0003] However, existing coronary stents are generally made of biocompatible alloys, but these materials generally cannot provide drug release into the blood vessel and are easily affected by cell proliferation, leading to intimal hyperplasia and restenosis. Moreover, conventional stents remain permanently in the blood vessel after expansion, causing long-term mechanical irritation and inflammatory response.

[0004] Therefore, those skilled in the art have provided a novel anti-dislodgement coronary stent protection device to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a novel anti-dislodgement coronary stent protection device. This invention can remove the anti-dislodgement support ring, and then the stent will slowly dissolve in the blood vessel and eventually be absorbed by the human body.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A novel anti-detachment coronary stent protection device includes a guidewire and a mesh frame. A balloon is fixedly mounted on the outer end of the guidewire, and a support frame is fixedly mounted on the outer end of the mesh frame. Multiple locking blocks are fixedly mounted on both ends of the support frame, and anti-detachment mechanisms are movably mounted on both ends of the support frame.

[0008] Furthermore, both the space frame and the support frame include two first layers, and a second layer and a third layer are respectively provided on the opposite side of the two first layers.

[0009] Furthermore, the first layer is made of a magnesium-based alloy, and the second layer is made of polyglycolic acid.

[0010] Furthermore, the third layer is made of polylactic acid.

[0011] Furthermore, the anti-detachment mechanism includes two anti-detachment support rings, and multiple placement slots are provided on the outer sides of the two anti-detachment support rings.

[0012] Furthermore, the anti-detachment mechanism includes two anti-detachment support rings, and multiple placement slots are provided on the outer sides of the two anti-detachment support rings.

[0013] Furthermore, both the support frame and the net frame are movably disposed at the outer end of the balloon, and the balloon is fixedly disposed between two anti-load support rings.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model proposes a novel anti-dislodgement coronary stent protection device. When the mesh frame and support frame of this novel device are located inside the blood vessel, the two first-layer magnesium-based alloys have good biocompatibility with human tissue, which can effectively reduce the inflammatory response and the risk of thrombosis. At the same time, the magnesium-based alloys can dissolve in the blood vessel and be absorbed by the human body. The second layer of polyglycolic acid and the third layer of polylactic acid can act as drug release carriers, which can slowly release anti-inflammatory and anti-proliferative drugs after the stent is implanted, further reducing the risk of restenosis.

[0016] 2. This utility model proposes a novel anti-dislodgement coronary stent protection device. The support frame and the anti-dislodgement support ring of this novel device can be separated. After the support frame and the mesh frame are supported, a portion of the air is released from the balloon until the outer diameter of the balloon is smaller than the inner diameter of the mesh frame. Since the two ends of the balloon are conical, the two ends will also inflate after the balloon is inflated in the middle. After releasing a portion of the air, the supporting force of the balloon on the support frame at both ends still exists, thus removing the anti-dislodgement support ring from the inner wall of the blood vessel. This can reduce foreign objects in the blood vessel, reduce the risk of thrombosis, and promote the recovery of healthy blood vessels. Attached Figure Description

[0017] Figure 1 This is an isometric schematic diagram of the present invention;

[0018] Figure 2 This is an isometric view of the present invention after it has been supported.

[0019] Figure 3 This is a schematic diagram of the internal structure of the space frame and support frame of this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the present invention;

[0021] Figure 5 This is a cross-sectional view of the present invention after it has been supported.

[0022] Legend:

[0023] 1. Balloon; 2. Guide wire; 3. Net frame; 4. Support frame; 5. Anti-detachment mechanism; 6. Locking block; 7. First layer; 8. Second layer; 9. Third layer; 501. Anti-detachment support ring; 502. Placement groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1 , Figure 2 One embodiment provided by this utility model:

[0026] A novel anti-detachment coronary stent protection device includes a guidewire 2 and a mesh frame 3. A balloon 1 is fixedly installed at the outer end of the guidewire 2, and a support frame 4 is fixedly installed at the outer end of the mesh frame 3. Multiple locking blocks 6 are fixedly installed at both ends of the support frame 4, and anti-detachment mechanisms 5 are movably installed at both ends of the support frame 4.

[0027] Specifically, when the guidewire 2 guides the balloon 1 to the position where support is needed, the balloon 1 is inflated, supporting both the support frame 4 and the mesh frame 3 against the inner wall of the blood vessel, thereby widening the inner wall of the blood vessel and allowing blood to flow through the inside of the mesh frame 3. This can effectively relieve the blood flow restriction caused by arterial stenosis, thereby improving blood supply.

[0028] Reference Figure 3 Both the space frame 3 and the support frame 4 include two first layers 7, and a second layer 8 and a third layer 9 are respectively provided on the opposite side of the two first layers 7;

[0029] The first layer 7 is made of magnesium-based alloy, and the second layer 8 is made of polyglycolic acid;

[0030] The third layer, number 9, is made of polylactic acid.

[0031] Specifically, when the mesh frame 3 and the support frame 4 are located inside the blood vessel, the magnesium-based alloy, as the first layer 7 material, has excellent compatibility with human tissues and can effectively reduce the body's rejection reaction to foreign implants, thereby reducing postoperative inflammation and discomfort. The polyglycolic acid of the second layer 8 and the polylactic acid of the third layer 9 can act as drug release carriers, and can slowly release anti-inflammatory and anti-proliferative drugs after stent implantation, further reducing the risk of restenosis. At the same time, the magnesium-based alloy, polyglycolic acid and polylactic acid are all biodegradable, can gradually dissolve in the body and be absorbed by the body, reduce the amount of foreign matter remaining in the body, reduce the risk of long-term complications, and promote the regeneration and repair of blood vessels.

[0032] Reference Figure 4 , Figure 5 The anti-detachment mechanism 5 includes two anti-detachment support rings 501, and multiple placement slots 502 are provided on the outer side of the two anti-detachment support rings 501.

[0033] The anti-detachment mechanism 5 includes two anti-detachment support rings 501, and multiple placement slots 502 are provided on the outer side of the two anti-detachment support rings 501;

[0034] Both the support frame 4 and the net frame 3 are movably set at the outer end of the balloon 1, and the balloon 1 is fixedly set between the two anti-load support rings 501.

[0035] Specifically, after the support frame 4 is supported by the balloon 1, the locking blocks 6 at both ends of the support frame 4 will separate from the placement slots 502 of the two anti-dislodgement support rings 501, so that the mesh frame 3 and the support frame 4 can be placed in the blood vessel separately. Then, the balloon 1 releases some air until the outer diameter of the balloon 1 is smaller than the inner diameter of the mesh frame 3. Since the two ends of the balloon 1 are conical, the two ends will also inflate and enlarge after the middle of the balloon 1 is inflated. After releasing some air, the supporting force of the two ends of the balloon 1 on the support frame 4 is still there, so it can be removed from the inner wall of the blood vessel along with the anti-dislodgement support rings 501. This can reduce foreign bodies in the blood vessel, reduce stimulation to the vascular endothelium, and reduce the risk of thrombosis. The patient's postoperative recovery speed is improved, and the quality of life is also improved. The mesh frame 3 and the support frame 4 do not need to be removed. They will slowly dissolve in the blood vessel, which helps to enhance the natural healing of the vascular endothelium, improve the adaptability to blood flow, and improve the overall health of the blood vessel.

[0036] Working principle: When the guide wire 2 guides the balloon 1 to the position that needs support, the balloon 1 is inflated, supporting both the support frame 4 and the mesh frame 3 against the inner wall of the blood vessel, thereby widening the inner wall of the blood vessel and allowing blood to flow through the inside of the mesh frame 3. When the mesh frame 3 and the support frame 4 are located inside the blood vessel, the magnesium-based alloy of the first layer 7 has good biocompatibility with human tissue, can dissolve in the blood vessel, and can be absorbed by the human body. The polyglycolic acid of the second layer 8 and the polylactic acid of the third layer 9 can act as drug release carriers, and can slowly release anti-inflammatory, anti-proliferative and other drugs after the stent is implanted.

[0037] Secondly, after the support frame 4 is supported by the balloon 1, the locking blocks 6 at both ends of the support frame 4 will separate from the placement slots 502 of the two anti-dislodgement support rings 501, so that the mesh frame 3 and the support frame 4 can be placed in the blood vessel separately. Then, the balloon 1 releases some air until the outer diameter of the balloon 1 is smaller than the inner diameter of the mesh frame 3. Since the two ends of the balloon 1 are conical, the two ends will also inflate and enlarge after the middle of the balloon 1 is inflated. After releasing some air, the supporting force of the two ends of the balloon 1 on the support frame 4 is still there, so it is removed from the inner wall of the blood vessel along with the anti-dislodgement support rings 501, reducing the stimulation of the vascular endothelium and reducing the risk of thrombosis. Then the mesh frame 3 and the support frame 4 do not need to be removed and will slowly dissolve in the blood vessel, improving the adaptability to blood flow and the overall health of the blood vessel.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel anti-dislodgement coronary stent protection device, comprising a guidewire (2) and a mesh frame (3), characterized in that: The guide wire (2) is fixedly provided with a balloon (1) at its outer end, the net frame (3) is fixedly provided with a support frame (4) at its outer end, the support frame (4) is fixedly provided with multiple locking blocks (6) at both ends, and the support frame (4) is movably provided with an anti-detachment mechanism (5) at both ends.

2. The novel anti-dislodgement coronary stent protection device according to claim 1, characterized in that: The space frame (3) and the support frame (4) each include two first layers (7), and a second layer (8) and a third layer (9) are respectively provided on the opposite side of the two first layers (7).

3. The novel anti-dislodgement coronary stent protection device according to claim 2, characterized in that: The first layer (7) is made of magnesium-based alloy, and the second layer (8) is made of polyhydroxyacetic acid.

4. The novel anti-dislodgement coronary stent protection device according to claim 2, characterized in that: The third layer (9) is made of polylactic acid.

5. The novel anti-dislodgement coronary stent protection device according to claim 1, characterized in that: The anti-detachment mechanism (5) includes two anti-detachment support rings (501), and multiple placement slots (502) are provided on the outer side of the two anti-detachment support rings (501).

6. The novel anti-dislodgement coronary stent protection device according to claim 5, characterized in that: Multiple card blocks (6) are movably disposed at the inner end of the placement slot (502), and the anti-displacement support ring (501) is movably disposed on both sides of the support frame (4) and the grid frame (3).

7. A novel anti-dislodgement coronary stent protection device according to claim 1 or 5, characterized in that: The support frame (4) and the net frame (3) are both movably arranged at the outer end of the balloon (1), and the balloon (1) is fixedly arranged between the two anti-load support rings (501).

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