Drug balloon and blood vessel dilation equipment applying drug balloon

Abstract

The utility model provides a medicine balloon and a blood vessel dilatation device using the same. The medicine balloon comprises an outer balloon and a dilatation balloon arranged in the outer balloon. The expansion bag comprises a plurality of leaf separating bags with windmill leaf-shaped structures; a plurality of leaf separating bags with windmill leaf-shaped structures form a gap channel during expansion, and blood circulation is allowed to be maintained in the expansion process, so that the ischemia risk of the far-end tissue of a target blood vessel is reduced; the method is particularly important for complex lesions needing long-time expansion; and the occurrence of related complications can be reduced. Meanwhile, due to the multi-leaf structure of the leaf-dividing bag, the leaf-dividing bag of the windmill leaf-shaped structure can fully expand the narrow part; the treatment efficiency and the success rate are improved; the innovative dilation equipment is not only suitable for treatment of common vascular stenosis, but also has important application value for special requirements of drug balloon dilation treatment and the like.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a drug-eluting balloon and a vasodilator using the same. Background Technology

[0002] Coronary heart disease is a serious disease caused by narrowing or blockage of the coronary arteries surrounding the human heart. It is known as the number one killer of human health, causing a large number of deaths every year and placing a huge burden on individuals, families and society.

[0003] With the continuous development of endovascular interventional techniques, the treatment of coronary heart disease has evolved from traditional surgery, through endovascular balloon angioplasty, to the current stent implantation and drug-eluting balloon angioplasty techniques. Currently, endovascular interventional therapy is moving towards the latest concept of "intervention without implantation," and drug-eluting balloon angioplasty catheters are a prime example of this latest and most advanced product.

[0004] When traditional medicated capsules are implanted inside blood vessels for dilation, the outer surface of the capsule completely adheres to the vessel wall, blocking the flow of blood inside the vessel. If dilation treatment is performed for a long time, it can lead to ischemia in the tissues distal to the target vessel, increasing the risk of related complications. At the same time, blood vessels have a certain degree of elasticity. When the capsule is inflated, the blood vessel only expands to the diameter of the capsule at that time. After the treatment is completed and the capsule is removed, the blood vessel will shrink back to a smaller diameter than the capsule at the time of treatment, reducing the therapeutic effect. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a drug-eluting balloon, including an outer balloon and an expansion balloon disposed within the outer balloon. The surface of the outer balloon is used to coat with a drug. When the drug-eluting balloon is deeply inserted into a blood vessel, the drug coated on the surface of the drug-eluting balloon diffuses in the blood lesion plaque. The expansion balloon is used to expand and open the outer balloon.

[0006] The dilatation balloon comprises multiple expandable lobed sacs, one side of which is an elastic surface and the other opposite side is an inelastic surface. When multiple lobed sacs expand simultaneously, the elastic surfaces of the multiple lobed sacs deform, while the inelastic surfaces do not deform, thus forming a gap channel between adjacent lobed sacs. When the drug balloon penetrates deep into the blood vessel, blood can pass through the gap channel.

[0007] In a preferred embodiment, the leaf-splitting sac is a windmill blade-shaped structure; the concave surface of the windmill blade-shaped structure is an inelastic surface, and the convex surface of the windmill blade-shaped structure is an elastic surface; when multiple leaf-splitting sacs expand simultaneously, the concave surface of the leaf-splitting sac and the convex surface of the adjacent leaf-splitting sac form a gap channel.

[0008] The specific design involves a feed nozzle in the middle of the balloon; one end of the feed nozzle is connected to multiple lobulated sacs; the other end is used to connect to an external catheter, through which the external contrast agent enters each lobulated sac, causing the lobulated sacs to change from a contracted state to an expanded state.

[0009] The specific design involves multiple segmented bladders distributed around the feed nozzle.

[0010] The specific plan involves 3-6 lobular sacs;

[0011] In the specific design, the internal spaces of multiple lobed sacs are interconnected through connecting channels set along the outer periphery of the sac.

[0012] In a preferred embodiment, the plurality of lobular sacs are integrally formed.

[0013] To achieve the above objectives, this utility model also provides a vasodilator, including a catheter and the aforementioned drug balloon; one end of the catheter is connected to the middle of the balloon via an inlet, and the other end is used to inject an external contrast agent.

[0014] Compared with related technologies, the drug-eluting balloon provided by this utility model has the following beneficial effects:

[0015] 1. Reduced complications: The multiple windmill-shaped lobed sacs form interstitial channels during dilation, allowing blood flow to be maintained during dilation, thereby reducing the risk of ischemia in tissues distal to the target vessel; this is especially important for complex lesions requiring prolonged dilation; and helps reduce the occurrence of related complications.

[0016] 2. More complete dilation: Due to its multi-lobed structure, the windmill-shaped lobed sacs can more fully dilate the narrowed part, improving the efficiency and success rate of treatment;

[0017] 3. Wide applicability: This innovative dilation device is not only suitable for the treatment of ordinary vascular stenosis, but also has important application value for special needs such as drug balloon dilation therapy.

[0018] 4. One-piece molding: The one-piece molded windmill blade is technically simpler and more reliable, improving the durability and safety of the equipment. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of the drug-eluting balloon inserted into a blood vessel according to this utility model;

[0020] Figure 2 This is a cross-sectional view of the expanded drug-eluting balloon of this invention.

[0021] The diagram is labeled as follows: 1. Balloon; 11. External capsule; 2. Blood vessel; 3. Lobulated capsule;

[0022] 31. Elastic surface; 32. Inelastic surface; 33. Gap channel;

[0023] 4. Feed nozzle; 5. Guide tube. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please refer to the following: Figures 1-2 The drug-eluting balloon 1 includes an outer balloon 11 and an expansion balloon disposed within the outer balloon 11. The surface of the outer balloon 11 is used to coat the outer balloon with a drug. When the drug-eluting balloon 1 is deeply inserted into the blood vessel 2, the drug coated on the surface of the drug-eluting balloon 1 diffuses in the blood lesion plaque. The expansion balloon is used to expand and open the outer balloon after expansion.

[0026] The dilatation sac includes multiple expandable lobed sacs 3, with one side of each lobed sac 3 being an elastic surface 31 and the other opposite side being an inelastic surface 32. When multiple lobed sacs 3 expand simultaneously, the elastic surface 31 of the multiple lobed sacs deforms, while the inelastic surface 32 does not deform, thus forming a gap channel 33 between adjacent lobed sacs 3. When the drug balloon 1 penetrates deep into the blood vessel 2, blood can pass through the gap channel 33.

[0027] Compared with related technologies, the drug-eluting balloon 1 provided by this utility model has the following beneficial effects:

[0028] 1. Reduced complications: The multiple windmill-shaped lobed sacs 3 form interstitial channels 33 during dilation, allowing blood flow to be maintained during dilation, thereby reducing the risk of ischemia in tissues distal to the target vessel 2; this is especially important for complex lesions that require prolonged dilation; and helps reduce the occurrence of related complications.

[0029] 2. Wide applicability: This innovative dilation device is not only suitable for the treatment of ordinary vascular stenosis, but also has important application value for special needs such as drug balloon dilation.

[0030] In a preferred embodiment, the leaf sac 3 is a windmill blade-shaped structure; the concave surface of the windmill blade-shaped structure is an inelastic surface 32, and the convex surface of the windmill blade-shaped structure is an elastic surface 31; when multiple leaf sacs 3 expand simultaneously, the concave surface of the leaf sac 3 and the convex surface of the adjacent leaf sac 3 form a gap channel 33.

[0031] In the specific design, the balloon 1 has an inlet 4 in the middle; one end of the inlet 4 is connected to multiple lobed sacs 3; the other end is used to connect to an external conduit 5, and the external contrast agent enters each lobed sac 3 through the inlet 4, causing the lobed sacs 3 to change from a contracted state to an expanded state.

[0032] The specific design involves multiple segmented bladders 3 surrounding the feed nozzle 4.

[0033] The specific treatment plan involves 3-6 lobed sacs 3. Due to their multi-lobed structure, the windmill-like lobed sacs 3 can more fully expand the narrowed portion, thus improving the efficiency and success rate of treatment.

[0034] In the specific design, the internal spaces of multiple lobed sacs 3 are interconnected through connecting channels set along the outer periphery of the sac 1.

[0035] In a preferred embodiment, the multiple blade-shaped bladders 3 are integrally formed; the integrally formed windmill blade-shaped bladders are technically simpler and more reliable, improving the durability and safety of the equipment.

[0036] To achieve the above objectives, this utility model also provides a vascular dilation device, including a catheter 5 and the drug balloon 1; one end of the catheter 5 is connected to the inlet 4 in the middle of the balloon 1, and the other end is used to inject external contrast agent.

[0037] The working principle provided by this utility model is as follows:

[0038] Insert the drug-eluting balloon 1 into the blood vessel 2;

[0039] Contrast agent is injected through catheter 5 and enters multiple different lobulated sacs 3 through inlet 4, causing each lobulated sac 3 to dilate. After the lobulated sacs 3 dilate, the supporting outer sac dilates, and the drug coated on the surface of the outer sac diffuses within the blood lesion plaque.

[0040] Since one side of the lobular sac 3 is an elastic surface 31 and the other opposite side is an inelastic surface 32, when multiple lobular sacs 3 expand simultaneously, the elastic surface 31 of the multiple lobular sacs deforms, while the inelastic surface 32 does not deform, thus forming a gap channel 33 between adjacent lobular sacs 3. When the drug balloon 1 penetrates deep into the blood vessel 2, blood can pass through the gap channel 33.

[0041] Meanwhile, the contrast agent can be visualized under X-ray, allowing for real-time monitoring of the balloon's position, observation of any deviation, occlusion of collateral branches, and whether the balloon is adequately inflated.

[0042] Preferably, the internal spaces of the multiple lobular sacs 3 are interconnected by connecting channels provided along the outer periphery of the sac 1, ensuring that the contrast agent in each lobular sac 3 is filled uniformly and that the lobular sac 3 expands uniformly.

[0043] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A drug-eluting balloon, comprising an outer balloon and an expansion balloon disposed within the outer balloon, wherein the surface of the outer balloon is used to coat with a drug; when the drug-eluting balloon is deeply inserted into a blood vessel, the drug coated on the surface of the drug-eluting balloon diffuses in the blood lesion plaque; the expansion balloon is used to expand and open the outer balloon after expansion; Its characteristics are: The dilatation balloon includes multiple expandable lobed sacs, one side of which is an elastic surface and the other opposite side is an inelastic surface. When multiple lobed sacs expand simultaneously, the elastic surfaces of the multiple lobed sacs deform, while the inelastic surfaces do not deform, thus forming a gap channel between adjacent lobed sacs. When the drug balloon penetrates deep into the blood vessel, blood can pass through the gap channel.

2. The drug-eluting balloon according to claim 1, characterized in that, The lobed sacs are windmill blade-shaped structures; the concave surface of the windmill blade-shaped structure is an inelastic surface, and the convex surface of the windmill blade-shaped structure is an elastic surface; when multiple lobed sacs expand simultaneously, the concave surface of the lobed sacs and the convex surface of the adjacent lobed sacs form a gap channel.

3. The drug-eluting balloon according to claim 1, characterized in that, The balloon has an inlet nozzle in the middle; one end of the inlet nozzle is connected to multiple lobulated sacs; the other end is used to connect to an external catheter, and the external contrast agent enters each lobulated sac through the inlet nozzle, causing the lobulated sacs to change from a contracted state to an expanded state.

4. The drug-eluting balloon according to claim 3, characterized in that, Multiple lobed bladders are distributed around the feed nozzle.

5. The drug-eluting balloon according to claim 4, characterized in that, The number of lobular sacs is 3-6.

6. The drug-eluting balloon according to claim 4, characterized in that, The internal spaces of multiple lobed sacs are interconnected by connecting channels set along the outer periphery of the sac.

7. The drug-eluting balloon according to claim 6, characterized in that, The multiple lobed sacs are integrally formed.

8. A vasodilator device, comprising a catheter, characterized in that, It also includes the drug balloon as described in any one of claims 3-7; one end of the catheter is connected to the middle of the balloon via an inlet, and the other end is used to inject an external contrast agent.

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