Multifunctional medicine balloon

Abstract

The invention relates to a multifunctional medicine balloon which comprises a balloon body, a catheter and a connecting handle, the balloon body comprises a balloon body and thrombectomy control rails, the middle of the balloon body is sunken in the radial direction, and the thrombectomy control rails are connected with shoulders at the two ends of the balloon body and arranged on the periphery of the balloon body in parallel in the radial direction. According to the invention, expansion is carried out at a blood vessel stenosis part, an effective hemodynamic effect can be provided for the part, and the restenosis rate of an embolism part is reduced; the sunken part of the balloon body increases the surface area of the balloon and carries medicine together with the thrombectomy control track, so that the medicine loading capacity is improved; meanwhile, the thrombus extraction control track can increase assistance for blood vessel expansion and support and is matched with the sunken part of the capsule body to crush and capture thrombus in the blood vessel; by means of the sawtooth-shaped butt-joint net, thrombus debris remaining in the blood vessel is collected, the thrombus debris is prevented from flowing into a smaller blood vessel at the far end of the blood vessel to cause secondary blockage, the multiple effects of blood vessel expansion, thrombus extraction and hyperplasia resistance are achieved, and the operation efficiency and success rate are improved.

Description

Technical Field

[0001] The invention relates to a drug balloon, in particular to a multifunctional drug balloon, and belongs to the technical field of medical devices. Background Art

[0002] Drug-eluting balloons have been widely used in the field of interventional therapy. They block blood vessels by balloon expansion and release functional drugs, playing a significant role in the treatment of vascular embolism and restenosis. However, the residual thrombus after vascular expansion may accumulate again, and the broken thrombus may enter the distal blood vessels with the blood flow, causing blockage of other blood vessels. At this time, if the thrombectomy catheter or thrombectomy stent is used again, it will cause secondary damage to the blood vessels. In addition, the thrombectomy catheter and thrombectomy stent have low drug loading capacity, poor ability to dissolve thrombi with a high degree of calcification, low operational safety, and thrombi are prone to fall off at will. For this reason, it is necessary to develop a multifunctional drug-eluting balloon to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a multifunctional drug balloon, which can solve the problems of residual thrombus after the drug balloon dilates the blood vessel, multiple operations damage the blood vessel, low drug loading and operability of the thrombus removal stent / catheter, and achieve the multiple functions of dilating the blood vessel, removing the thrombus, and preventing the restenosis of the blood vessel. The technical scheme is as follows: A multifunctional drug balloon comprises a balloon, a catheter and a connecting handle. The balloon comprises a balloon body and a thrombectomy control track. The middle of the balloon body is radially concave. The thrombectomy control track is connected to shoulders at both ends of the balloon body and is radially parallelly arranged on the periphery of the balloon body.

[0004] Furthermore, the depression is an arc-shaped depression.

[0005] Furthermore, there are at least two depressions which are axially spaced in the middle of the balloon. The depressions can increase the surface area of ​​the balloon and allow thrombi to get stuck in the depressions to prevent the balloon from expanding and shifting. At the same time, the depressions can provide an effective blood flow guiding structure at curved and narrow lesions to achieve a hemodynamic effect.

[0006] Furthermore, a serrated docking net is provided between the capsule body and the thrombus removal control track. The serrated docking net is a tubular structure consisting of a base and a serrated end. The connecting handle is transmission-connected to the base of the serrated docking net through a control pipeline.

[0007] Furthermore, there are two serrated butt joint nets, the serrated ends of the two serrated butt joint nets are offset towards each other and are axially slidably arranged at the two ends of the thrombus removal control track respectively.

[0008] Furthermore, the serrated docking network is a hollow tubular structure, the lumen of which can pass contrast fluid and is connected to the control pipeline.

[0009] Further, the control pipeline is arranged closely along the inner side of the thrombus removal control track. The control pipeline is a fiber tube, and each control pipeline individually controls the serrated docking net at one end.

[0010] Further, the serrated docking net is a retractable structure, and its serrated angle is 30° - 90°. When the serrated docking net contracts, the serrated angle will decrease. If the angle is less than 30°, due to the small change in the angle, the contraction effect will be affected; if the angle is greater than 90°, the axial distance of the serrated ends of the serrated docking net will be shortened, affecting the effect of the serrated docking net in clamping the thrombus.

[0011] Further, a medicine storage groove is arranged on the outer surface of the thrombus removal control track, and the medicine in the medicine storage groove releases its medicinal power at the place where the thrombus on the blood vessel wall falls off.

[0012] Further, the number of thrombus removal control tracks is 2 - 6, and the thrombus removal control track is a solid fiber structure. Increasing the number of thrombus removal control tracks can enhance the blood vessel dilation effect. However, the thrombus removal control track itself has a certain width. If the number of thrombus removal control tracks exceeds 6, the distance between the thrombus removal control tracks will be too close, which will affect the drug release effect on the surface of the capsule body and also affect the entry of the thrombus into the depression between the thrombus removal control track and the capsule body.

[0013] Compared with the prior art, its beneficial effects are as follows: The multifunctional drug balloon can dilate at the blood vessel stenosis site, providing an effective hemodynamic effect for this site and reducing the restenosis rate at the embolism site; the concave part of the capsule body increases the surface area of the balloon, jointly carrying drugs with the thrombus removal control track to increase the drug loading capacity; at the same time, the thrombus removal control track can also assist in blood vessel dilation and support, and cooperate with the concave part of the capsule body to break and capture the thrombus in the blood vessel; with the help of the serrated docking net, the collection of residual thrombus debris in the blood vessel is realized, avoiding the flow of thrombus debris into smaller blood vessels at the distal end of the blood vessel and causing secondary blockage, achieving multiple effects of blood vessel dilation, thrombus removal, and anti - proliferation, and improving the efficiency and success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the capsule body structure of the present invention; Figure 3 It is a schematic diagram of the initial state of the serrated docking net of the present invention; Figure 4 It is a schematic diagram of the docking state of the serrated docking net of the present invention; Figure 5 It is a schematic diagram of the contraction state of the serrated docking net of the present invention; Figure 6 It is a schematic diagram of the surface structure of the thrombus removal control track of the present invention; Figure 7Schematic diagram of the structure when the capsule body of the present invention has three depressions; In the figure: 1. Capsule body, 2. Serrated docking net, 3. Thrombus extraction control track, 4. Inner tube, 5. Control pipeline, 6. Connection handle, 7. Drug storage tank. Embodiment

[0015] For the convenience of those of ordinary skill in the art to understand and implement the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are used to illustrate the present invention, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments. Example

[0016] As Figure 1 and Figure 2 shown, a multifunctional drug balloon includes a capsule body 1, a thrombus extraction control track 3, a serrated docking net 2, a control pipeline 5 and a connection handle 6. The surface of the capsule body 1 is coated with a drug coating having an anti-thrombotic effect. An arc-shaped depression is provided in the middle of the capsule body 1. A drug storage tank 7 is provided on the outer surface of the thrombus extraction control track 3. The drug in the drug storage tank 7 is an anti-thrombotic, anti-inflammatory, immunomodulatory, anti-proliferative or anticoagulant drug. Example

[0017] As Figure 1 shown, two thrombus extraction control tracks 3 are arranged radially and parallelly on the periphery of the capsule body 1. There is a drug storage tank 7 on the outer surface of the thrombus extraction control track 3, and a serrated docking net 2 is slidably connected to the inner side. With this structure, it can not only provide a sliding track for the serrated docking net 2, but also release drugs while expanding and supporting blood vessels. Example

[0018] As Figures 1-6 shown, when in use, the capsule body 1 is sent to the blood vessel stenosis to expand the blood vessel, and the drug coated on the surface of the capsule body 1 starts to be released. Then, the remaining thrombus after blood vessel dilation is placed in the depression between the capsule body 1 and the thrombus extraction control track 3. By rotating the drug balloon, the thrombus extraction control track 3 rotates circumferentially to break and strip the thrombus from the blood vessel wall. At this time, the thrombus extraction control track 3 is in close contact with the blood vessel wall, and the anti-thrombotic drug in the drug storage tank 7 on the outer surface is directly released at the place where the thrombus falls off. The axial docking of the serrated docking nets 2 at both ends is controlled through the control pipeline 5. After docking, the serrated ends of the two serrated docking nets 2 are inserted into each other in a staggered manner to form a tubular net to clamp and fix the thrombus. Then, the serrated docking net 2 is controlled through the control pipeline 5 to contract towards the depression of the capsule body to prevent thrombus debris from flowing into smaller blood vessels at the distal end of the blood vessel, and the thrombus is attached to the surface of the capsule body 1. Finally, the balloon is depressurized and withdrawn to remove the thrombus, so as to achieve multiple effects of expanding blood vessels, extracting thrombus and anti-proliferation. Example

[0019] As Figures 3-5As shown, the number of the serrated docking meshes 2 is two, which are respectively arranged at both ends of the thrombus extraction control track 3. One control pipeline 5 controls one serrated docking mesh 2. During use, by radially and parallelly pulling the two control pipelines 5, the axial back-and-forth sliding of the two serrated docking meshes 2 can be controlled. By cross-pulling the two control pipelines 5, the two serrated docking meshes 2 can be controlled to contract towards the axial center direction. Embodiment

[0020] The serrated docking mesh 2 is communicated with the control pipeline 5. By injecting contrast agent into the control pipeline 5, it enters the serrated docking mesh 2. The thrombus range can be determined through the contrast result of the serrated docking mesh 2 and the cyst body 1. Embodiment

[0021] The control pipeline 5 is connected and communicated with the base of the serrated docking mesh 2, closely attached to the inner side of the thrombus extraction control track, and extends all the way to the connection handle 6. There is a fixing device at each turning point of the whole drug balloon to make the control pipeline 5 closely attached to the balloon and the connection handle 6. Embodiment

[0022] As Figure 7 shown, the cyst body 1 can be provided with 3 depressions to address different situations.

[0023] The above embodiments are only illustrative of the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A multi-functional drug balloon, comprising a balloon, a catheter and a connection handle, characterized in that, The balloon includes a balloon body (1) and an embolectomy control track (3). The middle part of the balloon body (1) is radially sunken. The embolectomy control track (3) is connected to the shoulders at both ends of the balloon body (1) and is radially and parallelly arranged on the periphery of the balloon body (1).

2. The multifunctional drug balloon according to claim 1, characterized in that, The sunken part is an arc-shaped sunken part.

3. A multifunctional drug balloon according to any one of claims 1 or 2, characterized in that There are at least two such sunken parts, which are axially spaced and arranged in the middle of the balloon body (1).

4. The multifunctional drug balloon according to claim 1, wherein, A serrated docking net (2) is also sleeved between the balloon body (1) and the embolectomy control track (3). The serrated docking net (2) is a tubular structure, composed of a base and serrated ends. The connection handle (6) is drivingly connected to the base of the serrated docking net (2) through a control pipeline (5).

5. The multifunctional drug balloon according to claim 4, characterized in that, There are two serrated docking nets (2). The serrated ends of the two serrated docking nets (2) are misaligned with each other and are respectively axially slidably arranged at both ends of the embolectomy control track (3).

6. A multifunctional drug balloon according to claim 4, characterized in that, The serrated docking net (2) is a hollow tubular structure and is communicated with the control pipeline (5).

7. The multifunctional drug balloon according to claim 4, wherein, The control pipeline (5) is tightly arranged on the inner side of the embolectomy control track (3).

8. A multifunctional drug balloon according to claim 4, characterized in that, The serrated docking net (2) is a telescopic structure, and its serrated angle is 30° - 90°.

9. The multifunctional drug balloon according to claim 1, wherein, A medicine storage groove (7) is arranged on the outer surface of the embolectomy control track (3).

10. A multifunctional drug balloon according to claim 1, characterized in that, The number of the embolectomy control tracks (3) is 2 - 6.

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