Double-balloon drug balloon catheter

Abstract

The utility model discloses a drug balloon catheter with double balloons, which relates to the technical field of medical instruments, and is characterized in that the drug balloon catheter with double balloons comprises a support tube, and a sliding component is arranged on the support tube and used for protecting the loss of therapeutic drugs as much as possible when a delivery balloon enters a lesion position. The sliding assembly comprises a protective shell, a guide wire, an inner tube, micropores, balloons and medicine, the protective shell is installed on the supporting tube, the guide wire is installed in the protective shell in a sliding mode, the inner tube is installed on the guide wire, the guide wire can slide in the inner tube, the multiple micropores are formed in the inner tube, the two balloons are installed on the inner tube, the micropores are formed in the corresponding faces of the balloons, and the medicine is arranged in the protective shell. Medicine is mounted on the surface of each balloon, so that loss of the medicine is reduced to the greatest extent when the balloons are conveyed, the medicine can be effectively reserved on the balloons so as to guarantee the treatment effect of the balloons, and meanwhile, damage of the medicine flushed down by blood flow to human bodies is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a double-balloon drug delivery balloon catheter. Background Art

[0002] Double balloon dilation is a technique used to dilate narrowed vessels at complex bifurcation points by placing two balloon catheters inside the narrowed blood vessel at the bifurcation point.

[0003] Drug-eluting balloons utilize a delivery system to carry medication, which is released during balloon inflatation. The medication penetrates the vascular tissue, treating the target diseased vessel. Similar to interventional stenting, this treatment method is a minimally invasive procedure, characterized by minimal trauma and rapid recovery. Furthermore, because no stent-like structural foreign body remains within the blood vessel during the interventional procedure, it reduces the risk of mid- to long-term stent complications, such as late-stage thrombosis and restenosis.

[0004] Before reaching the intended stenotic lesion, the drug in a drug-eluting balloon is constantly washed away by the high-speed blood flow within the artery. Currently, drug-eluting balloons on the market experience nearly 20% drug loss during the process of delivery through the blood vessel, approximately 20% during balloon expansion, 10-20% during balloon retraction, 40-50% loss after entering the bloodstream and reaching downstream, and about 10% loss of the drug coating in contact with the blood vessel. Only 5% of the drug enters the vascular tissue at the moment of balloon expansion. The amount of drug entering the vascular tissue directly determines the treatment effect. During balloon delivery and expansion, the loss of surface drug is as high as 90%, which seriously affects the therapeutic effect of the drug-eluting balloon on the occluded lesion. At the same time, the drug washed away by the blood increases the unnecessary metabolic burden on the body.

[0005] Therefore, in order to solve the above-mentioned technical problems, this application proposes a double-balloon drug delivery balloon catheter. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a double-balloon drug delivery balloon catheter.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a dual-balloon drug delivery catheter, wherein the dual-balloon drug delivery catheter comprises;

[0008] Support tube;

[0009] The sliding assembly is arranged on the support tube, which is used to protect the delivery balloon and minimize the loss of therapeutic drugs when entering the lesion location. The sliding assembly includes a protective shell, a guide wire, an inner tube, micropores, a balloon and drugs. The protective shell is installed on the support tube, and a guide wire is slidably installed in the protective shell. The inner tube is installed on the guide wire, and the guide wire can slide in the inner tube. A plurality of micropores are opened on the inner tube, and two balloons are installed on the inner tube. The micropores are opened on the corresponding surfaces of the balloons, and drugs are installed on the surface of each balloon.

[0010] The rotating component is mounted on the sliding component to further prevent loss of therapeutic drugs during balloon delivery.

[0011] Preferably, the rotating assembly includes a blocking plate, a sliding hole, a baffle and a block. The blocking plate is installed in the protective shell. A plurality of sliding holes are provided on the blocking plate. Each sliding hole is set as a group. A block is slidingly connected in each group of sliding holes. Each block is commonly connected to a baffle. The baffle is inserted into the inner tube to facilitate rotation with the inner tube.

[0012] Preferably, a protective sleeve is installed on the support tube, one end of the inner tube extends out of the protective sleeve, an air pressure chamber is installed on the extended end of the inner tube, a rotating shaft is installed on the air pressure chamber, and a handle is installed on the rotating shaft for easy holding and rotation.

[0013] Preferably, each of the balloons can slide in the protective shell, and each balloon is installed in the protective shell, both ends of each balloon are sealed with the inner tube, and each balloon is foldable, and the drug is installed on the surface inside the fold, so as to minimize the loss of the drug during delivery.

[0014] Preferably, the baffle is installed at the front end of the frontmost balloon, and the baffle can slide in the protective shell. When not in use, the baffle is behind the blocking plate, so as to prevent the blood flow from flushing the medicine on the balloon when the balloon is delivered.

[0015] Preferably, the inner tube can slide within the protective sleeve, facilitating the insertion and retraction of the inner tube.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the utility model, when inserting the protective shell into the inner tube, the protective shell is inserted together with the inner tube, and then the protective shell is sent to the blocked part through the inner tube. At the same time, the balloon in the protective shell also moves to the blocked part together with the protective shell and the inner tube, so as to minimize the loss of the drug when delivering the balloon, effectively retain the drug on the balloon to ensure the therapeutic effect of the balloon, and reduce the damage to the human body caused by the drug washed down by the blood flow.

[0018] 2. In this utility model, by rotating the inner tube, the baffle installed on the inner tube is rotated, causing all the blocks on the baffle to rotate to the position of the sliding hole. Then, the inner tube is moved towards the blockage until the balloon on the inner tube is detached from the protective shell and moved to the blockage. This achieves the goal of minimizing the loss of drug on the balloon while delivering the balloon quickly to the blockage. It can effectively, simply, conveniently and quickly detach the balloon from the protective shell and enter the blockage. Attached Figure Description

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the cross-sectional view of the protective shell in this utility model;

[0022] Figure 3 This is a schematic structural diagram of the Chinese medicine capsule of the utility model;

[0023] Figure 4 This is a structural diagram of the middle baffle of the utility model.

[0024] 1. Support tube; 2. Sliding assembly; 201. Protective shell; 202. Guide wire; 203. Inner tube; 204. Micropore; 205. Balloon; 206. Drug; 3. Rotating assembly; 301. Blocking plate; 302. Sliding hole; 303. Baffle; 304. Block; 4. Protective cover; 5. Air pressure chamber; 6. Rotating shaft; 7. Handle. Detailed Implementation

[0025] like Figure 1-4 As shown, this utility model provides a double-balloon drug delivery balloon catheter, including a support tube 1;

[0026] The sliding assembly 2 is mounted on the support tube 1 and is used to minimize the loss of therapeutic drug 206 when the delivery balloon 205 is inserted into the lesion site. The sliding assembly 2 includes a protective shell 201, a guidewire 202, an inner tube 203, micropores 204, a balloon 205, and the drug 206. The protective shell 201 is mounted on the support tube 1 and serves a protective function. The guidewire 202 is slidably installed inside the protective shell 201 and serves a guiding function. The inner tube 203 is mounted on the guidewire 202 and can slide within the inner tube 203. The inner tube 203 has multiple micropores 204 for outputting air pressure, and two balloons are mounted on the inner tube 203. 205, which is used to achieve the therapeutic effect, each balloon 205 can slide within the protective shell 201, and each balloon 205 is installed inside the protective shell 201 to prevent the loss of drug 206. The two ends of each balloon 205 are sealed to the inner tube 203 to facilitate inflation and expansion. Each balloon 205 is foldable to protect the drug 206. Micropores 204 are opened on the corresponding surfaces of the balloon 205 to facilitate the inflow of air pressure. Drug 206 is installed on the surface of each balloon 205, and the drug 206 is installed on the surface inside the fold to reduce the loss of drug 206.

[0027] The rotating assembly 3 is mounted on the sliding assembly 2 to further prevent the loss of therapeutic drugs 206 during balloon delivery 205. The rotating assembly 3 includes a baffle plate 301, a sliding hole 302, a baffle 303, and a stop 304. The baffle plate 301 is installed inside the protective shell 201. When not in use, the baffle plate 303 is located behind the baffle plate 301 and serves to achieve a self-locking function. Multiple sliding holes 302 are provided on the baffle plate 301 for quick unlocking. Each sliding hole 302 is set as a group, and a stop 304 is slidably connected in each group of sliding holes 302. Each stop 304 is connected to a baffle plate 303 for blocking. The baffle plate 303 is inserted into the inner tube 203 and can slide inside the protective shell 201 for easy unlocking. The baffle plate 303 is installed at the front end of the foremost balloon 205 to block the blood flow from flushing the drug 206.

[0028] A protective sleeve 4 is installed on the support tube 1 for protection. One end of the inner tube 203 extends out of the protective sleeve 4, and the inner tube 203 can slide inside the protective sleeve 4 for telescopic function. A pressure chamber 5 is installed at the extended end of the inner tube 203 for stamping function. A rotating shaft 6 is installed on the pressure chamber 5, and a handle 7 is installed on the rotating shaft 6 for facilitating stamping.

[0029] Working principle: First, a puncture needle is inserted into the radial artery. Then, a guidewire 202 is inserted into the puncture needle and withdrawn. The guidewire 202 then travels along the artery through the obstruction. The support tube 1 and the protective shell 201 mounted on the support tube 1 are then advanced through the guidewire 202 into the obstruction. As the protective shell 201 moves towards the obstruction, it simultaneously carries the flexible inner tube 203 and the balloon 205 on the inner tube 203 into the vicinity of the obstruction. The inner tube 203 is then rotated, causing the baffle 303 mounted on it to rotate. This rotation of the baffle 303 causes the stop blocks 304 on the baffle 303 to rotate on the barrier plate 301 until all the stop blocks 304 are rotated to the position of the sliding hole 302. The inner tube 203 is then moved towards the obstruction until the balloon 205 on the inner tube 203 is moved to the obstruction. Finally, the handle 7 is turned, and the balloon 205 is advanced towards the obstruction. The rotating shaft 6 pressurizes the air chamber 5, which then supplies air pressure to the inner tube 203. The air pressure enters the balloon 205 through the micro-holes 204 in the inner tube 203, inflating the balloon 205. The balloon 205 expands at the obstruction site, opening in an umbrella shape as it is pressurized, so that the side of the balloon 205 with the attached drug 206 fits tightly against the obstruction site. The drug 206 is then continuously and evenly released into the obstruction site, slowly seeping into the obstruction site from the surface of the balloon 205. After the drug 206 is fully released, the obstruction site expands. Then, air pressure is released to contract the balloon 205, which then retracts into the protective shell 201 through the inner tube 203. The inner tube 203 and the protective shell 201 are then withdrawn from the blood vessel, and finally, the guidewire 202 is withdrawn from the blood vessel.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A double-balloon (205) drug (206) balloon (205) catheter, characterized in that: The drug (206) balloon (205) catheter of the double balloon (205) comprises: Support tube (1); The sliding component (2) is arranged on the support tube (1) and is used to protect the delivery balloon (205) and reduce the loss of the therapeutic drug (206) as much as possible when the delivery balloon (205) enters the lesion position. The sliding component (2) comprises a protective shell (201), a guide wire (202), an inner tube (203), micropores (204), a balloon (205) and a drug (206). The protective shell (201) is installed on the support tube (1). The guide wire (202) is slidably installed in the protective shell (201). The inner tube (203) is installed on the guide wire (202). The guide wire (202) can slide in the inner tube (203). The inner tube (203) is provided with a plurality of micropores (204). Two balloons (205) are installed on the inner tube (203). The micropores (204) are provided on the corresponding surfaces of the balloons (205). The surface of each balloon (205) is provided with a drug (206). The rotating assembly (3) is arranged on the sliding assembly (2), and is used to further prevent the loss of the therapeutic drug (206) when the balloon (205) is transported.

2. A double-balloon (205) drug (206) balloon (205) catheter according to claim 1, characterized in that: The rotating assembly (3) comprises a baffle plate (301), a sliding hole (302), a baffle plate (303) and a stopper (304); the baffle plate (301) is installed in the protective shell (201); a plurality of sliding holes (302) are provided on the baffle plate (301); each sliding hole (302) is set as a group; each group of sliding holes (302) is slidably connected to a stopper (304); each stopper (304) is commonly connected to a baffle plate (303); and the baffle plate (303) is plugged into the inner tube (203).

3. A double-balloon (205) drug (206) balloon (205) catheter according to claim 2, characterized in that: The support tube (1) is provided with a protective sleeve (4), one end of the inner tube (203) extends out of the protective sleeve (4), an air pressure chamber (5) is provided at the extended end of the inner tube (203), a rotating shaft (6) is provided on the air pressure chamber (5), and a handle (7) is provided on the rotating shaft (6).

4. A double-balloon (205) drug (206) balloon (205) catheter according to claim 3, characterized in that: Each of the balloons (205) can slide in the protective shell (201), and each of the balloons (205) is installed in the protective shell (201), both ends of each of the balloons (205) are sealedly connected to the inner tube (203), and each of the balloons (205) is foldable, and the medicine (206) is installed on the surface inside the fold.

5. A double-balloon (205) drug (206) balloon (205) catheter according to claim 4, characterized in that: The baffle (303) is installed at the front end of the frontmost balloon (205). The baffle (303) can slide in the protective shell (201). When not in use, the baffle (303) is behind the blocking plate (301).

6. A double-balloon (205) drug (206) balloon (205) catheter according to claim 5, characterized in that: The inner tube (203) can slide inside the protective sleeve (4).

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