Precise-positioning drug sustained-release balloon

Abstract

The utility model discloses a drug sustained-release balloon capable of being accurately positioned, and relates to the technical field of medical sustained-release balloons. Comprising a sustained-release balloon body, an administration connecting tube is arranged at the bottom of the sustained-release balloon body, the bottom of the administration connecting tube is fixedly connected with an injector, and a limiting frame facilitating position fixing of the sustained-release balloon body is arranged on the outer side of the sustained-release balloon body. When the sustained-release balloon is used, medicine can be fed into the sustained-release balloon body through the injector and the medicine feeding connecting pipe, and the sustained-release balloon body is extruded by the sustained-release balloon body before sustained release; the first limiting rod, the second limiting rod, the third limiting rod, the fourth limiting rod, the fifth limiting rod, the sixth limiting rod, the seventh limiting rod and the eighth limiting rod are in an unfolded and separated state, the slow-release balloon body can be fixed to the position where medicine needs to be administered, the slow-release balloon body is gradually shrunk along with slow release of the slow-release balloon body, and the slow-release balloon body is fixed to the position where medicine needs to be administered. The limiting rods are gradually contracted and closed, and the sustained-release balloon body can be directly taken out after being diluted.

Description

Technical Field

[0001] This utility model relates to the field of medical sustained-release balloon technology, specifically a drug sustained-release balloon that can be precisely positioned. Background Technology

[0002] During cardiovascular interventional surgery, various types of balloons may be used, such as pre-dilation balloons, post-dilation balloons, and cutting balloons. Their function is to open up the "blocking plaque" in severely narrowed blood vessels, preparing for the next step of stent placement.

[0003] Drug-eluting balloon technology is a novel technology derived from balloon dilation technology. This technology uses a drug-eluting balloon as a carrier to deliver drugs to the narrowed area of ​​the blood vessel. After reaching the "destination", the balloon is inflated, allowing the drug on the balloon surface to adhere tightly to the inner wall of the blood vessel. The drug is well released in the narrowed areas such as the coronary artery, and releases relevant drugs that inhibit cell proliferation locally into the arterial wall, thereby inhibiting vascular intimal hyperplasia and reducing vascular stenosis. Finally, the drug-eluting balloon is withdrawn from the body.

[0004] As a novel interventional treatment device, drug-eluting balloons have been proven effective and safe in various coronary artery stenosis lesions, small vessel lesions, and bifurcation lesions through multiple clinical trials. Depending on the treatment site, drug-eluting balloons can be classified as coronary drug-eluting balloons and peripheral drug-eluting balloons.

[0005] In the prior art, since the surface of a drug-eluting balloon is generally smooth before sustained release, it may deviate from its original position due to the impact of blood flow on the inner lining of the blood vessel, which may affect the drug delivery process after sustained release. Utility Model Content

[0006] The purpose of this invention is to provide a drug-releasing balloon that can be precisely positioned to solve the problem mentioned in the background art, where the drug balloon, which is generally smooth before release, may deviate from its original position due to the impact of blood flow on the inner lining of blood vessels, thus potentially affecting the drug delivery process after release.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a drug-releasing balloon with precise positioning, comprising a sustained-release balloon body, a drug delivery connecting tube at the bottom of the sustained-release balloon body, the bottom of the drug delivery connecting tube being fixedly connected to a syringe, and a limiting frame for fixing the position of the sustained-release balloon body on its outer side.

[0008] The limiting frame includes a first limiting rod, a second limiting rod, a third limiting rod, a fourth limiting rod, and a fifth limiting rod. A second limiting rod is located on one side of the first limiting rod, and the first and second limiting rods are connected by a medical elastic cord. A third limiting rod is located on the side of the second limiting rod away from the first limiting rod, and the second and third limiting rods are connected by a medical elastic cord. A fourth limiting rod is located on the side of the third limiting rod away from the second limiting rod, and the third and fourth limiting rods are connected by a medical elastic cord. The fourth limiting rod is located on the side of the third limiting rod away from the third limiting rod. A fifth limiting rod is provided on one side. The fourth and fifth limiting rods are connected by a medical elastic thread. The first and fifth limiting rods are symmetrically arranged on both sides of the sustained-release balloon body. The second, third, and fourth limiting rods are located on the outer side of one hemisphere of the sustained-release balloon body. A sixth, seventh, and eighth limiting rods are also provided on the outer side of the other hemisphere of the sustained-release balloon body. The first and sixth limiting rods, the sixth and seventh limiting rods, the seventh and eighth limiting rods, and the eighth and fifth limiting rods are all connected by medical elastic threads.

[0009] Before the sustained-release balloon releases its contents, the first, second, third, fourth, fifth, sixth, seventh, and eighth limiting rods are in a spread-out, separated state due to the compression of the balloon body, thus fixing the balloon body at the desired drug delivery location. As the sustained-release balloon body releases its contents, it gradually shrinks, and the limiting rods gradually contract. Once the sustained-release balloon body is fully diluted, the first, second, third, fourth, fifth, sixth, seventh, and eighth limiting rods tighten and close under the action of their respective elastic lines, allowing for direct removal. The function of each elastic line is to tighten the limiting rods.

[0010] The bottom of the third limiting rod is fixedly connected to the drug delivery connecting tube via a flexible connector.

[0011] The first, second, third, fourth, fifth, sixth, seventh, and eighth limiting rods are each provided with multiple threading holes for threading medical elastic threads.

[0012] The sustained-release balloon contains a drug. The drug can be administered into the sustained-release balloon via a syringe and a delivery tube.

[0013] A contrast agent is fixedly mounted on the outside of the drug delivery connecting tube. The contrast agent facilitates in vivo positioning.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This precisely positioned drug-releasing balloon allows medication to be administered into the balloon body via a syringe and a drug delivery tube. Before the sustained release begins, the first, second, third, fourth, fifth, sixth, seventh, and eighth limiting rods are in a spread-out and separated state due to the compression of the balloon body, thus fixing the sustained-release balloon body at the desired drug delivery location.

[0016] 2. This precisely positioned drug-releasing balloon gradually shrinks as the balloon releases its contents. The first, second, third, fourth, fifth, sixth, seventh, and eighth limiting rods then contract and converge. Once the balloon is fully diluted, the limiting rods tighten under the action of the elastic lines, allowing for direct removal. The imaging device facilitates in vivo positioning. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic cross-sectional view of the present invention.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the sustained-release balloon body of this utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the third limiting rod and the drug delivery connecting tube of this utility model;

[0021] Figure 4 This is a partial cross-sectional structural diagram of the present invention.

[0022] In the diagram: 1. Sustained-release balloon body; 2. Drug delivery connecting tube; 3. Syringe; 4. Drug; 5. First limiting rod; 6. Second limiting rod; 7. Medical elastic cord one; 8. Third limiting rod; 9. Medical elastic cord two; 10. Fourth limiting rod; 11. Medical elastic cord three; 12. Fifth limiting rod; 13. Medical elastic cord four; 14. Imaging device. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-4 This utility model provides a technical solution: a drug-releasing balloon with precise positioning, including a sustained-release balloon body 1, a drug delivery connecting tube 2 is provided at the bottom of the sustained-release balloon body 1, the bottom of the drug delivery connecting tube 2 is fixedly connected to a syringe 3, and a limiting frame is provided on the outside of the sustained-release balloon body 1 to facilitate its fixed position.

[0025] The limiting frame includes a first limiting rod 5, a second limiting rod 6, a third limiting rod 8, a fourth limiting rod 10, and a fifth limiting rod 12. A second limiting rod 6 is located on one side of the first limiting rod 5, and the first limiting rod 5 and the second limiting rod 6 are connected by a medical elastic cord 7. A third limiting rod 8 is located on the side of the second limiting rod 6 away from the first limiting rod 5, and the second limiting rod 6 and the third limiting rod 8 are connected by a medical elastic cord 9. A fourth limiting rod 10 is located on the side of the third limiting rod 8 away from the second limiting rod 6, and the third limiting rod 8 and the fourth limiting rod 10 are connected by a medical elastic cord 11. The fourth limiting rod 12 is located on the side of the third limiting rod 5 away from the third limiting rod 6. A fifth limiting rod 12 is provided on one side of the positioning rod 8. The fourth limiting rod 10 and the fifth limiting rod 12 are connected by a medical elastic thread 13. The first limiting rod 5 and the fifth limiting rod 12 are symmetrically arranged on both sides of the sustained-release balloon body 1. The second limiting rod 6, the third limiting rod 8 and the fourth limiting rod 10 are located on the outer side of the hemisphere of the sustained-release balloon body 1. A sixth limiting rod, a seventh limiting rod and an eighth limiting rod are also provided on the outer side of the other hemisphere of the sustained-release balloon body 1. The first limiting rod 5 and the sixth limiting rod, the sixth limiting rod and the seventh limiting rod, the seventh limiting rod and the eighth limiting rod, and the eighth limiting rod and the fifth limiting rod 12 are all connected by medical elastic threads. The first limiting rod 5, the second limiting rod 6, the third limiting rod 8, the fourth limiting rod 10, the fifth limiting rod 12, the sixth limiting rod, the seventh limiting rod, and the eighth limiting rod are connected by elastic lines to form an expandable and contractible ring that wraps around the sustained-release balloon body 1 and can change along with the sustained-release balloon body 1.

[0026] The first limiting rod 5, the second limiting rod 6, the third limiting rod 8, the fourth limiting rod 10, the fifth limiting rod 12, the sixth limiting rod, the seventh limiting rod and the eighth limiting rod are all long rods, made of stainless steel, nickel-titanium alloy or cobalt-chromium alloy.

[0027] The bottom of the third limiting rod 8 is fixedly connected to the drug delivery connecting tube 2 via a flexible connector. The flexible connector can be a soft rope or an elastic rope.

[0028] The first limiting rod 5, the second limiting rod 6, the third limiting rod 8, the fourth limiting rod 10, the fifth limiting rod 12, the sixth limiting rod, the seventh limiting rod, and the eighth limiting rod are all provided with multiple threading holes for threading medical elastic threads.

[0029] The sustained-release balloon body 1 contains a drug 4. The drug can be administered into the sustained-release balloon body 1 via a syringe 3 and a drug delivery connecting tube 2.

[0030] The surface of the sustained-release balloon body 1 has multiple micropores, which can slowly exude medication to the affected area. The pore size is determined according to the size of the medication, requiring that after the sustained-release balloon body 1 is expanded by the medication, the pore size is 1-3 times the size of the medication, so that the medication can slowly exude.

[0031] A microporous membrane can also be provided inside the sustained-release balloon body 1. The shape of the microporous membrane is adapted to the shape and size of the sustained-release balloon body 1. Multiple drug outlet holes are distributed on the surface of the sustained-release balloon body 1. The selection standard for the microporous membrane is that its pore size is 1-3 times the size of the drug. After the drug solution slowly seeps out through the microporous membrane, it acts on the affected area through the drug outlet holes on the sustained-release balloon body 1.

[0032] The sustained-release balloon body 1 can also be a double-layer structure, with multiple micropores distributed on the outer layer and drug solution filling the space between the inner and outer layers. After the sustained-release balloon body 1 is expanded, the size of the micropores allows the drug solution to slowly seep out.

[0033] A contrast agent 14 is fixedly installed on the outside of the drug delivery connecting tube 2. The contrast agent 14 is provided to facilitate in vivo positioning.

[0034] Working principle: When using the precisely positioned drug-releasing balloon, the drug can be administered into the balloon body 1 through the syringe 3 and the drug delivery connecting tube 2. Before the sustained release of the drug, the first limiting rod 5, the second limiting rod 6, the third limiting rod 8, the fourth limiting rod 10, the fifth limiting rod 12, the sixth limiting rod, the seventh limiting rod, and the eighth limiting rod are in a spread-out state due to the compression of the balloon body 1, which can fix the balloon body 1 at the position where the drug needs to be administered. As the sustained release of the drug is completed, the balloon body 1 gradually shrinks, and the above-mentioned limiting rods gradually contract and close. After the sustained release of the drug is completed, the above-mentioned limiting rods tighten under the action of the elastic lines and can be directly removed.

[0035] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A drug-releasing balloon with precise positioning capability, comprising a sustained-release balloon body (1), characterized in that: The bottom of the sustained-release balloon body (1) is provided with a drug delivery connecting tube (2), the bottom of which is fixedly connected to the syringe (3), and a limiting frame is provided on the outside of the sustained-release balloon body (1) to facilitate its fixed position.

2. The drug-releasing balloon with precise positioning according to claim 1, characterized in that: The limiting frame includes a first limiting rod (5), a second limiting rod (6), a third limiting rod (8), a fourth limiting rod (10), and a fifth limiting rod (12). A second limiting rod (6) is provided on one side of the first limiting rod (5). The first limiting rod (5) and the second limiting rod (6) are connected by a medical elastic cord (7). A third limiting rod (8) is provided on the side of the second limiting rod (6) away from the first limiting rod (5). The second limiting rod (6) and the third limiting rod (8) are connected by a medical elastic cord (9). A fourth limiting rod (10) is provided on the side of the third limiting rod (8) away from the second limiting rod (6). The third limiting rod (8) and the fourth limiting rod (10) are connected by a medical elastic cord (11). 10) A fifth limiting rod (12) is provided on the side away from the third limiting rod (8). The fourth limiting rod (10) and the fifth limiting rod (12) are connected by a medical elastic thread (13). The first limiting rod (5) and the fifth limiting rod (12) are symmetrically arranged on both sides of the sustained-release balloon body (1). The second limiting rod (6), the third limiting rod (8) and the fourth limiting rod (10) are located on the outer side of the hemisphere of the sustained-release balloon body (1). A sixth limiting rod, a seventh limiting rod and an eighth limiting rod are also provided on the outer side of the other hemisphere of the sustained-release balloon body (1). The first limiting rod (5) and the sixth limiting rod, the sixth limiting rod and the seventh limiting rod, the seventh limiting rod and the eighth limiting rod, and the eighth limiting rod and the fifth limiting rod (12) are all connected by a medical elastic thread.

3. The drug-releasing balloon with precise positioning according to claim 2, characterized in that: The bottom of the third limiting rod (8) is fixedly connected to the drug delivery connecting tube (2) through a flexible connector.

4. A drug-releasing balloon with precise positioning according to claim 2 or 3, characterized in that: The first limiting rod (5), the second limiting rod (6), the third limiting rod (8), the fourth limiting rod (10), the fifth limiting rod (12), the sixth limiting rod, the seventh limiting rod, and the eighth limiting rod are all provided with multiple threading holes for threading medical elastic threads.

5. A drug-releasing balloon with precise positioning according to claim 1 or 2, characterized in that: The sustained-release balloon body (1) is filled with a drug (4).

6. A drug-releasing balloon with precise positioning according to claim 1 or 2, characterized in that: A imaging device (14) is fixedly installed on the outside of the drug delivery connecting tube (2).

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