Balloon and intracranial artery dilation system

Abstract

The utility model discloses a balloon and an intracranial artery dilatation system. The balloon comprises a balloon body, a plurality of micropores which are formed in the balloon wall of the balloon body and communicated with an inner cavity of the balloon body, and annular protruding parts located on the two sides of the balloon body in the axial direction. After the balloon is expanded, the annular protruding parts make contact with the inner wall of the artery, so that a gap is formed between the balloon wall between the two annular protruding parts and the inner wall of the artery, and medicine flowing out of the micropores enters the gap at first. When the balloon is used, the medicine flowing out of the micropores of the balloon wall of the balloon body enters the gap firstly and does not directly act on the inner wall of the artery, so that the impact of the medicine on the inner wall of the artery can be remarkably reduced, the damage to the artery can be remarkably reduced, and the probability of injury of an inner membrane, aneurysm and acute bleeding can be remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the field of medical technology, in particular to a balloon and an intracranial artery dilation system. Background Art

[0002] As is known, the balloon is used to dilate the narrow lesion position of the human artery (such as the intracranial artery) once, so as to increase the inner diameter of the artery at the lesion position to a certain extent. In order to reduce the degree and probability of endothelial tearing, tissue bleeding, collagen exposure, and vascular dissection that may occur after balloon dilatation, drug balloons have appeared in the prior art, that is, the outer surface of the balloon body is coated with drugs that inhibit cell proliferation. However, the drug balloons in the prior art have the following defects: on the one hand, the drug coating on the surface of the balloon body causes the balloon's flexibility to deteriorate, thereby poor compliance to small and curved arteries; on the other hand, the amount of drug that the balloon body can carry is small; and there are other problems caused by the drug coating surface.

[0003] In order not to affect the flexibility of the balloon and to be able to provide sufficient drugs, a balloon with a new structure has appeared in the prior art (patent number CN215386905U provides such a balloon), in which many micropores are opened on the wall of the balloon body. When the balloon expands to dilate the artery, the drug from outside the body is supplied into the balloon and flows out through the micropores on the wall of the balloon to be supplied to the artery, thereby not reducing the flexibility of the balloon and being able to provide sufficient drugs to the artery.

[0004] However, the defect of the above-mentioned balloon with micropores is that after the balloon is expanded, the balloon is tightly attached to the inner wall of the artery, and thus the micropores are also attached to the inner wall of the artery. The high pressure state and pressure fluctuation of the pressure pump used to pump drugs outside the body cause the drug solution to directly act on the inner wall with a large impact force, which may cause aggravated arterial damage, for example, damage the endothelium, leading to aneurysm and acute bleeding. Utility Model Content

[0005] In view of the above-mentioned technical problems existing in the prior art, the embodiments of the present utility model provide a balloon and an intracranial artery dilation system.

[0006] In order to solve the above technical problems, the technical solution adopted in the embodiment of the utility model is:

[0007] A balloon comprises: a balloon body, a plurality of micropores arranged on the balloon wall of the balloon body and communicating with the inner cavity of the balloon body, and annular protrusions located on both sides of the balloon body in the axial direction; wherein:

[0008] After the balloon is expanded, the annular protrusion contacts the inner wall of the artery so that a gap exists between the balloon wall between the two annular protrusions and the inner wall of the artery, so that the drug flowing out of the micropores first enters the gap.

[0009] Preferably, at least one annular support portion is formed on the balloon wall of the balloon body between the two annular protrusions.

[0010] Preferably, at least one of the annular protrusions is provided with a catharsis groove, and the catharsis groove enables the drug to flow out axially from a position corresponding to the balloon body through the catharsis groove.

[0011] Preferably, the cathartic groove passes through to the outer peripheral surface of the annular raised portion.

[0012] Preferably, the two annular raised portions are each provided with a catharsis groove, each annular raised portion is provided with a plurality of catharsis grooves, and the plurality of catharsis grooves are arranged circumferentially.

[0013] Preferably, the micropores are circular holes, and the pore diameter of the micropores is 1 um-200 um.

[0014] The utility model also discloses an intracranial artery dilation system, comprising: a handle, a stress relief tube connected to the head of the handle, a catheter proximally connected to the stress relief tube, and a guide wire passing through the catheter. The utility model is characterized in that the intracranial artery dilation system also includes the above-mentioned balloon and a pressure pump for providing medicine to the balloon.

[0015] Preferably, the intracranial artery dilatation system further comprises a rapid exchange port located on the catheter, a developing marker ring located at the end of the balloon, and a catheter marker ring located on the catheter.

[0016] Compared with the prior art, the balloon and intracranial artery dilation system disclosed in the utility model have the following beneficial effects:

[0017] By providing annular protrusions at both ends of the balloon body, a gap is formed between the balloon wall of the balloon body and the inner wall of the artery. The drug flowing out from the micropores of the balloon wall will first enter the gap without directly acting on the inner wall of the artery, thereby significantly reducing the impact of the drug on the inner wall of the artery, significantly reducing damage to the artery, and further significantly reducing the probability of damaging the endothelium, aneurysm, and acute bleeding.

[0018] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to restrict the present invention.

[0019] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the utility model. When appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present device or method.

[0021] Figure 1 The figure is a schematic diagram of the structure of the intracranial artery dilation system provided in an embodiment of the utility model.

[0022] Figure 2 This is a front view of the balloon provided in an embodiment of the utility model.

[0023] Figure 3 A three-dimensional view of a balloon provided in an embodiment of the present utility model.

[0024] Figure 4 This is an end view of the balloon body.

[0025] Reference numerals:

[0026] 10-balloon; 20-guidewire; 30-catheter; 31-catheter marker ring; 32-quick exchange port; 33-development marker ring; 40-delivery cable; 50-stress relief tube; 60-handle; 11-balloon body; 12-micropore; 13-annular protrusion; 14-annular support; 15-laxative groove; 100-artery. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0030] like Figures 1 to 4 As shown, the utility model discloses a balloon 10 and an intracranial artery dilation system having the balloon 10, the intracranial artery dilation system is used to deliver the balloon 10 to the inner hole of the diseased artery 100, and the intracranial artery 100 dilation system also includes: a handle 60, a catheter 30, a stress relief tube 50, a delivery cable 40, a guide wire 20 and a pressure pump; the stress relief tube 50 is connected to the handle 60, the proximal end of the catheter 30 is connected to the stress relief tube 50, the balloon 10 is connected to the distal end of the catheter 30, the guide wire 20 passes through the catheter 30 and the interior of the balloon 10, the delivery cable 40 is connected to the proximal end of the catheter 30, and the pressure pump is located on the handle 60 side for delivering drugs (rapamycin or paclitaxel) to the catheter 30 and to the balloon 10 through the catheter 30. After the balloon 10 is delivered to the diseased artery 100 by the catheter 30 and the guide wire 20, the balloon 10 expands to dilate the inner wall of the artery 100. The catheter 30 is provided with a catheter marker ring 31 , the end of the balloon 10 is provided with a development marker ring 33 , and the catheter 30 is also provided with a quick exchange port 32 .

[0031] The function of the handle 60 is to facilitate the holding during the operation, especially when the drug is perfused, the pressure pump needs to be connected to the perfusion catheter 30, and the connection method is a threaded connection. At this time, it is necessary to hold the handle 60 and keep it still, and rotate the pressure connection tube. After the two are firmly connected, the drug can be perfused. The function of the stress relief tube 50 is to increase the strength of the connection between the handle 60 and the proximal catheter 30. If there is no stress relief tube 50 during the process of pushing the balloon 10, the connection between the two may be broken. The function of the delivery cable 40 is, on the one hand, to provide a drug delivery channel for the system. Its proximal end is connected to the handle 60, and the drug enters the handle 60 through the pressure pump. With the pressure of the pressure pump, the drug in the handle 60 enters the balloon 10 through the catheter 30. On the other hand, the purpose of selecting the steel cable is the rigidity of its material. If the material is a polymer, it is easy to bend during the pushing process. The role of the catheter marker ring 31 is that the length of the catheter 30 is fixed, so it is not necessary to use an angiography machine during the pushing process. The position of the balloon 10 from the diseased artery 100 can be roughly calculated based on the position of the catheter marker ring 31 from the puncture point, and the amount of contrast agent used can be reduced during the operation, reducing the radiation damage to patients and medical staff. The design of the rapid exchange port 32 plays a role in reducing the operation time. After the guide wire 20 is in place during the operation, the distal end of the system is inserted from the distal end of the guide wire 20, the guide wire 20 is held still, and the system is slowly pushed along the guide wire 20 until the distal end of the guide wire 20 leaks out of the rapid exchange port 32. Because the speed of pushing the system along the guide wire 20 is slow, the pushing distance is reduced, which can reduce the operation time. Therefore, the design of the rapid exchange port 32 is very necessary. The role of the imaging marker ring 33 during the operation is to help the operator accurately locate. Before the balloon 10 is expanded, it is necessary to ensure that the lesion is inside the two imaging marker rings 33 of the balloon 10.

[0032] The utility model mainly improves the structure of the balloon 10. Specifically, the balloon 10 includes a balloon body 11, a plurality of micropores 12 arranged on the balloon wall of the balloon body 11 and connected with the inner cavity of the balloon body 11, and annular protrusions 13 located on both sides of the axial direction of the balloon body 11. After the balloon 10 expands the artery 100, the annular protrusions 13 contact the inner wall of the artery 100 so that there is a gap between the balloon wall between the two annular protrusions 13 and the inner wall of the artery 100. In this way, the drug flowing out of the micropores 12 of the balloon wall of the balloon body 11 will first enter the gap and will not directly act on the inner wall of the artery 100, thereby significantly reducing the impact of the drug on the inner wall of the artery 100, thereby significantly reducing the damage to the artery 100, and further significantly reducing the probability of damaging the intima, aneurysm of the artery 100, and acute bleeding.

[0033] In some preferred embodiments, at least one annular support portion 14 is formed on the balloon wall of the balloon body 11 between the two annular protrusions 13. The annular support portion 14 is used to support the middle part of the balloon body 11 to prevent the middle of the balloon 10 from collapsing. The number of annular support portions 14 can be set according to the specifications of the balloon 10. For example, two or more annular support portions 14 can be set in a balloon 10 that is longer and / or has a larger radial dimension.

[0034] The aperture of the micropore 12 can be set according to the specifications of the balloon 10. For a small-sized balloon 10 (diameter less than 2 mm, length less than 2 mm), the recommended size of the micropore 12 is 1-50 um, for a medium-sized balloon 10 (diameter less than 3 mm, length less than 3 mm), the recommended size of the micropore 12 is 50-100 um, and for a large-sized balloon 10 (diameter greater than 3 mm, length greater than 3 mm), the recommended size of the micropore 12 is 100-200 um.

[0035] In some preferred embodiments, at least one annular protrusion 13 is provided with a catharsis groove 15, and the catharsis groove 15 enables the drug to flow out axially from the position corresponding to the balloon body 11 through the catharsis groove 15. Preferably, the catharsis groove 15 is provided on both annular protrusions 13, and more preferably, each annular protrusion 13 is provided with a plurality of catharsis grooves 15 arranged circumferentially, and more preferably, the catharsis groove 15 passes through the outer peripheral surface of the annular protrusion 13. The function of the catharsis groove 15 is that after the liquid drug fills the lesion site, the drug can flow out from the catharsis groove 15, which can reduce the expansion of the inner wall of the artery 100 by the drug and reduce the damage to the inner wall.

[0036] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of this application, and the examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0037] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the utility model. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the utility model may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the utility model should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

[0038] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A balloon, characterized in that: include: A balloon body, a plurality of micropores arranged on the balloon wall of the balloon body and communicating with the inner cavity of the balloon body, and annular protrusions located on both sides of the balloon body in the axial direction; wherein: After the balloon is expanded, the annular protrusion contacts the inner wall of the artery so that there is a gap between the balloon wall between the two annular protrusions and the inner wall of the artery, so that the drug flowing out of the micropores first enters the gap.

2. The balloon according to claim 1, characterized in that At least one annular supporting portion is formed on the balloon wall of the balloon body between the two annular protrusions.

3. The balloon according to claim 1, characterized in that A catharsis groove is provided on at least one of the annular protrusions, and the catharsis groove enables the drug to flow out axially from the position corresponding to the balloon body through the catharsis groove.

4. The balloon according to claim 3, characterized in that The cathartic groove passes through the outer peripheral surface of the annular raised portion.

5. The balloon according to claim 4, characterized in that The two annular raised portions are each provided with a catharsis groove, and each annular raised portion is provided with a plurality of catharsis grooves, and the plurality of catharsis grooves are arranged circumferentially.

6. The balloon according to claim 1, characterized in that The micropores are circular holes, and the pore diameter of the micropores is 1um-200um.

7. An intracranial artery dilation system, comprising: A handle, a stress relief tube connected to the handle head, a catheter proximally connected to the stress relief tube, and a guide wire passing through the catheter, characterized in that it also includes a balloon as described in any one of claims 1 to 6, and a pressure pump for providing medicine to the balloon.

8. The intracranial artery dilation system according to claim 7, characterized in that: It also includes a rapid exchange port located on the catheter, a developing marker ring located at the end of the balloon, and a catheter marker ring located on the catheter.

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