A medical implant and assembly, a medical kit

Abstract

The application provides a medical implant and assembly, a medical kit, the medical implant assembly comprising a medical implant and an embolization coil, the medical implant comprising a balloon and a positioning part; the balloon is made of biodegradable material; the balloon has a receiving cavity, and a first opening in communication with the receiving cavity is further arranged on a proximal balloon wall of the balloon; the positioning part has a transmission channel extending through in an axial direction, a distal end of the positioning part is connected to the first opening of the balloon, and the transmission channel is in communication with the receiving cavity; the embolization coil is made of biodegradable material. The medical implant assembly is used for implanting into a tumor cavity of a hemangioma to promote thrombosis and organization of the hemangioma, and when the hemangioma is thrombosed and organized, and the balloon and the embolization coil are completely degraded, the tumor body of the hemangioma can be greatly reduced, thereby reducing or eliminating clinical symptoms caused by the space-occupying effect.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a medical implant and its components, and a medical kit. Background Technology

[0002] Intracranial aneurysms are a highly morbid and fatal cerebrovascular disease and a major cause of subarachnoid hemorrhage. In recent years, with advancements in medical technology, the development of medical devices and materials, and the accumulation of experience among interventional neurosurgeons, endovascular treatment has become the preferred method for reducing the rebleeding rate and mortality of ruptured intracranial aneurysms. Among these methods, embolizing coils to fill the aneurysm cavity to achieve thrombosis is a widely used endovascular treatment approach.

[0003] Currently, there are two types of embolization coils used clinically: non-degradable and biodegradable. Non-degradable embolization coils, even after filling and organizing the aneurysm thrombus, retain their original size and continue to compress nerves, blood vessels, and organs outside the aneurysm, resulting in persistent clinical symptoms due to the space-occupying effect. Biodegradable embolization coils, because their biodegradable components are not radiolucent, require the introduction of a radiolucent element to aid in visualization to meet clinical needs. Typically, the radiolucent element occupies a large volume and is non-degradable; therefore, once implanted into the aneurysm cavity along with the embolization coil, it remains permanently within the cavity, maintaining a significant aneurysm volume. Summary of the Invention

[0004] The purpose of this invention is to provide a medical implant and component, and a medical kit. The medical implant component is used to implant into the interior of a hemangioma and promote thrombosis and organization of the hemangioma. Most of the structure of the medical implant is degradable, so as to significantly reduce the size of the thrombotic and organized tumor and effectively weaken or even completely eliminate the clinical symptoms caused by the space-occupying effect.

[0005] To achieve the above objectives, the present invention provides a medical implant, comprising a balloon and a positioning part; the balloon is made of a biodegradable material; the balloon has a receiving cavity, and the proximal wall of the balloon is provided with a first opening communicating with the receiving cavity; the positioning part has a delivery channel extending through the axial direction, the distal end of the positioning part is connected to the first opening of the balloon, and the delivery channel communicates with the receiving cavity;

[0006] The medical implant is used to be compressed within the lumen of a microcatheter and is configured to be movable along the axial direction of the microcatheter, with the outer wall of the positioning portion in frictional contact with the inner wall of the microcatheter.

[0007] The medical implant is also used for implantation inside a target object having a second opening, and the positioning part is configured to be positioned at the second opening and cover a portion of the second opening.

[0008] Optionally, the cross-section of the positioning portion gradually increases from the proximal end to the distal end.

[0009] Optionally, the membrane material used to make the balloon is a non-elastic membrane; and / or, the positioning part is a self-expanding structure.

[0010] Optionally, the material of the balloon is any one of polylactic acid, polyglycolic acid, polyurethane, and polylactic acid-glycolic acid copolymer.

[0011] Optionally, a plurality of pores are formed on the sidewall of the positioning part, and in the expanded state, the sum of the areas of all the pores accounts for 20% to 25% of the area of ​​the sidewall of the positioning part.

[0012] To achieve the above objectives, the present invention also provides a medical implant assembly comprising a medical implant as described in any of the preceding claims and an embolization coil, the embolization coil being made of a biodegradable material and used to fill the receiving cavity of the balloon.

[0013] Optionally, the material of the embolization spring coil is any one of polylactic acid, polyglycolic acid, polyurethane, or polylactic acid-glycolic acid copolymer.

[0014] Optionally, the maximum inner diameter of the positioning part is greater than or equal to the diameter of the first opening, the minimum inner diameter of the positioning part is less than or equal to the diameter of the first opening, and the outer diameter of the plug spring coil is less than the minimum inner diameter of the positioning part.

[0015] Optionally, the maximum inner diameter of the positioning part is 1 mm to 2 mm, the minimum inner diameter of the positioning part is 0.5 mm to 1 mm, and the outer diameter of the plug spring coil is 0.01 inch to 0.017 inch.

[0016] To achieve the above objectives, the present invention also provides a medical kit including a microcatheter and a medical implant component as described in any of the preceding claims;

[0017] The medical kit is configured such that the medical implant is compressed within the lumen of the microcatheter, the medical implant is movable along the axial direction of the microcatheter, and the outer surface of the positioning portion is in frictional contact with the inner wall of the microcatheter.

[0018] The medical kit is also configured such that when the balloon extends from the lumen of the microcatheter and is in an expanded state, and the positioning portion is located at the distal end of the lumen of the microcatheter, the embolic coil is delivered along the lumen of the microcatheter to the receiving cavity of the balloon.

[0019] Optionally, the medical kit further includes a contrast agent for injecting the balloon along the lumen of the microcatheter, displacing the balloon from the microcatheter, and inflating the balloon.

[0020] Compared with the prior art, the medical implants and components, and medical kits of the present invention have the following advantages:

[0021] The aforementioned medical implant assembly includes a medical implant and an embolic coil; the medical implant includes a balloon and a positioning part; the balloon is made of a biodegradable membrane, the balloon has a receiving cavity, and the proximal wall of the balloon is provided with a first opening communicating with the receiving cavity; the positioning part has a delivery channel extending through it along its axial direction, the distal end of the positioning part is connected to the first opening of the balloon, and the delivery channel communicates with the receiving cavity; the medical implant is used to be compressed in the lumen of a microcatheter and is configured to be movable along the axial direction of the microcatheter, and the outer wall of the positioning part is in frictional contact with the inner wall of the microcatheter; the medical implant is also used to be implanted inside a target object having a second opening, the positioning part being configured to be positioned at the second opening and covering a portion of the second opening; the embolic coil is made of a biodegradable material and is used to fill the receiving cavity. The target object can be a hemangioma, and the second opening is the neck of the hemangioma. When the medical implant component is implanted into the cavity of the hemangioma, it can fill the cavity and promote thrombosis of the hemangioma. The accommodating cavity of the balloon is also used to contain contrast agent to assist in angiography of the embolization coil. As the embolization coil is packed into the accommodating cavity, the contrast agent is gradually discharged from the first balloon. This eliminates the need for the introduction of non-biodegradable metal imaging elements. Therefore, when the hemangioma thrombus organizes and the balloon and embolization coil are completely degraded, the volume of the aneurysm can be significantly reduced, thereby reducing or eliminating pressure on nerves, blood vessels, and organs outside the aneurysm, and thus weakening or eliminating clinical symptoms caused by the space-occupying effect. Furthermore, the positioning part is used to position itself at the neck of the hemangioma and covers a portion of the neck, which helps prevent the embolization coil from herniating into the carrier artery. Attached Figure Description

[0022] The accompanying drawings are provided to better understand the invention and are not intended to unduly limit the scope of the invention. Wherein:

[0023] Figure 1This is a schematic diagram of the structure of a medical implant according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a medical implant according to an embodiment of the present invention. Figure 2 and Figure 1 The observation directions are different;

[0025] Figure 3 This is a schematic diagram of the embolization spring coil of a medical implant assembly according to an embodiment of the present invention, in which the embolization spring coil is straightened.

[0026] Figure 4 This is a schematic diagram of the positioning part of a medical implant according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the positioning part of a medical implant component according to an embodiment of the present invention. Figure 5 and Figure 4 The observation directions are different;

[0028] Figure 6 This is a partially enlarged schematic diagram of the positioning portion of a medical implant component according to an embodiment of the present invention.

[0029] Figure 7 This is a schematic diagram of the structure of a medical implant component according to an embodiment of the present invention when the medical implant is compressed within the lumen of a microcatheter;

[0030] Figure 8 This is a schematic diagram of the structure of a medical implant component according to an embodiment of the present invention, in which the positioning part of the medical implant is compressed in the lumen of a microcatheter, and the balloon extends from the distal end of the lumen and expands.

[0031] Figure 9 This is a schematic diagram illustrating the usage state of a medical implant component provided according to an embodiment of the present invention.

[0032] [The annotations in the attached figures are explained below]:

[0033] 100-Medical implant, 110-Balloon, 111-Cavity, 112-First opening, 120-Positioning part, 200-Embryo spring coil, 210-Spring coil body;

[0034] 20 - Microcatheter, 21 - Lumen. Detailed Implementation

[0035] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the actual number, shape, and size of components in the actual implementation. In the actual implementation, the type, quantity, and proportion of each component can be arbitrarily changed, and the component layout may also be more complex.

[0036] Furthermore, while each embodiment described below possesses one or more technical features, this does not imply that users of the present invention must simultaneously implement all technical features in any embodiment, or can only separately implement some or all technical features in different embodiments. In other words, provided it is feasible, those skilled in the art can, based on the disclosure of the present invention and depending on design specifications or implementation requirements, selectively implement some or all technical features in any embodiment, or selectively implement a combination of some or all technical features in multiple embodiments, thereby increasing the flexibility in implementing the present invention.

[0037] As used herein, the singular forms “a,” “an,” and “the” include plural objects, and the plural form “a plurality” includes two or more objects, unless otherwise expressly indicated. As used herein, the term “or” is generally used to include the meaning of “and / or,” unless otherwise expressly indicated, and the terms “install,” “connect,” and “link” should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Connections can be mechanical or electrical. Connections can be direct or indirect through an intermediate medium, and can represent internal communication between two elements or an interaction between two elements. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this article, the terms “proximal” and “distal” refer to the relative orientation, position, and direction of the components or movements relative to each other from the perspective of the physician using the medical device. Although “proximal” and “distal” are not restrictive, “proximal” usually refers to the end of the medical device that is closer to the physician during normal operation, while “distal” usually refers to the end that first enters the patient’s body.

[0039] The core idea of ​​this invention is to provide a medical implant assembly comprising a medical implant and an embolic coil. The medical implant includes a balloon and a positioning portion, wherein the balloon is made of a biodegradable material. The balloon has a receiving cavity, and a first opening communicating with the receiving cavity is provided on the proximal wall of the balloon. The positioning portion has a delivery channel extending through it along its axial direction, the distal end of the positioning portion being connected to the first opening of the balloon and communicating the delivery channel with the receiving cavity. The medical implant is used to be compressed within the lumen of a microcatheter and is configured to be movable along the axial direction of the microcatheter, with the outer wall of the positioning portion in frictional contact with the inner wall of the microcatheter. The medical implant is also used for implantation into the interior of a target object having a second opening, the positioning portion being configured to be positioned at the second opening and covering a portion of the second opening. The embolic coil is made of a biodegradable material and is used to fill the receiving cavity of the balloon.

[0040] The target object can be a hemangioma. When the medical implant component is implanted into the lumen of the hemangioma, it can promote thrombosis and organization of the hemangioma. The hemangioma includes, but is not limited to, aneurysms. During use, contrast agent is loaded into the accommodative cavity of the balloon for assisted imaging, thereby eliminating the need to introduce non-degradable metal imaging elements to complete the embolization coil placement. When the hemangioma thromboses and organizes, and the embolization coil and the balloon are completely degraded, the volume of the hemangioma can be significantly reduced, thereby alleviating or eliminating pressure on nerves, blood vessels, and organs outside the aneurysm, and thus reducing or eliminating clinical symptoms caused by the space-occupying effect.

[0041] To make the objectives, advantages, and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clearly illustrate the objectives of the embodiments of the present invention. The same or similar reference numerals in the drawings represent the same or similar parts.

[0042] Please refer to Figures 1 to 5 The medical implant assembly provided in this embodiment of the invention includes a medical implant 100 and an embolization coil 200. The medical implant 100 includes a balloon 110 and a positioning part 120. The balloon 110 is made of a biodegradable material and has a receiving cavity 111 (e.g., Figure 9As indicated, the proximal wall of the balloon 110 is further provided with a first opening 112 communicating with the receiving cavity 111. The positioning part 120 has a delivery channel (not shown) extending through it along its axial direction. The distal end of the positioning part 120 is connected to the first opening 112 of the balloon 110, and the delivery channel communicates with the receiving cavity 111. The embolization coil 200 is made of a biodegradable material and is used to fill the receiving cavity 111 of the balloon 110.

[0043] Here, the balloon 110 is made of a membrane material, and the distal end of the positioning part 120 is connected to the first opening 112 of the balloon 110. This means that the distal end of the positioning part 120 is connected to the area of ​​the membrane material surrounding the first opening 120. The positioning part 120 can be connected to the membrane material by suture, heat fusion, adhesive bonding, or any other suitable method. The biodegradable materials used to manufacture the balloon 110 include, but are not limited to, any one of polylactic acid, polyglycolic acid, polyurethane, and polylactic-glycolic acid copolymer. Similarly, the biodegradable materials used to manufacture the embolization coil 200 include, but are not limited to, any one of polylactic acid, polyglycolic acid, polyurethane, and polylactic-glycolic acid copolymer.

[0044] The medical implant component is used for transmission via a microcatheter 20 (e.g., Figure 7 and Figure 8 As shown, the medical implant component is inserted into the interior of a target object through a second opening. The target object can be a hemangioma, and correspondingly, the second opening is the neck of the hemangioma. The hemangioma includes, but is not limited to, an aneurysm. When the medical implant component is implanted into the interior (i.e., the aneurysm cavity) of the hemangioma, it can promote thrombosis and organization of the hemangioma, thereby achieving the treatment of the hemangioma.

[0045] The specific implantation process of the medical implant component includes the following steps:

[0046] First, the microcatheter 20 is delivered into the patient's body along a guidewire pre-inserted into the body, with the distal end of the microcatheter 20 positioned at the apex of the hemangioma, and then the guidewire is withdrawn. Here, the apex of the hemangioma refers to the position of the hemangioma wall opposite the neck opening.

[0047] Next, the medical implant 100 is compressed into the lumen 21 of the microcatheter 20, and pushed along the lumen 21 by a pusher until the distal end of the balloon 110 is substantially flush with the distal end of the microcatheter 20. During this process, the medical implant 100 is entirely compressed within the lumen 21, at which point the positioning part 120 is approximately compressed into a cylindrical shape (e.g., ...). Figure 7As shown), the outer wall of the positioning part 120 is in frictional contact with the cavity wall of the inner cavity 21.

[0048] Subsequently, a contrast agent is infused into the receiving cavity 111 of the balloon 110. The contrast agent enters the receiving cavity 111 through the inner cavity 21, the delivery channel, and the first opening 112. Figure 8 As shown, under the propulsion of the contrast agent, the medical implant 100 moves relative to the microcatheter 20 in a proximal-to-distal direction, and the balloon 110 gradually extends out of the lumen 21 from the distal end of the microcatheter 20 and expands, while the positioning part 120 remains compressed within the lumen 21. It should be noted that... Figure 8 The balloon 110 described herein is shown as spherical, merely to illustrate that the balloon 110 is in an expanded state, and not its actual shape. As the balloon 110 expands, the blood within the tumor cavity is continuously squeezed out.

[0049] Subsequently, the position of the microcatheter 20 is adjusted by retraction or other operations to match the shape of the balloon 110 with the cavities of the hemangioma, and the outer wall of the balloon 110 is aligned with the tumor wall. Simultaneously, the infusion of contrast agent is stopped.

[0050] Then, the embolic spring coil 200 is pushed along the inner lumen 21 of the microcatheter 20 by a pusher rod, so that the embolic spring coil 200 passes through the delivery channel and the first opening 112 and fills the receiving cavity 111. During the filling of the embolic spring coil 200, the contrast agent is squeezed out of the receiving cavity 111 by the embolic spring coil 200, and the imaging effect of the medical implant 100 gradually weakens. Those skilled in the art should know that when the embolic spring coil 200 is completely filled in the receiving cavity 111, the space in the receiving cavity 111 not occupied by the embolic spring coil 200 is small, so the amount of contrast agent remaining in the receiving cavity 111 is also small, and thus the balloon 110 of the medical implant 100 is no longer clearly visible. Therefore, when the imaging of the balloon 110 is not obvious, it can be determined that the embolic spring coil 200 has been densely filled.

[0051] Finally, contrast agent is infused into the medical implant 100 along the inner cavity 21. Driven by the contrast agent, the medical implant 100 moves proximally to distally until the positioning part 120 dislodges from the inner cavity 21, causing the positioning part 120 to expand and position itself at the aneurysm neck orifice, with the outer wall of the positioning part 120 covering a portion of the aneurysm neck orifice. It is understood that the area corresponding to the proximal end of the delivery channel at the aneurysm neck orifice is not covered. (e.g.) Figure 9 (As shown).

[0052] In other words, during the implantation of the embolization coil 200, the medical implant assembly is visualized using the contrast agent to determine whether the embolization coil 200 is densely packed, eliminating the need for non-degradable metal imaging elements. As a result, after the hemangioma thrombosis and organization, and the complete degradation of the balloon 110 and the embolization coil 200, only the positioning portion 120 remains at the aneurysm neck, significantly reducing the size of the aneurysm and effectively alleviating or eliminating pressure on nerves, blood vessels, and organs outside the aneurysm, thereby weakening or eliminating clinical symptoms caused by the space-occupying effect. Furthermore, the positioning portion 120, positioned at the aneurysm neck and covering a portion of the neck, effectively reduces the likelihood of the embolization coil 200 herniating into the parent artery, thus reducing the risk of thrombosis within the parent artery.

[0053] In this embodiment, the positioning part 120 is preferably a self-expanding structural component. A self-expanding structural component is made of a highly elastic material and is pre-molded into a predetermined shape during manufacturing. When the structural component is subjected to external pressure or tension, it deforms; when the external pressure or tension is removed, the structural component returns to its predetermined shape under its own elastic force. The materials used to manufacture the positioning part 120 include, but are not limited to, at least one of nickel-titanium alloy, nickel-titanium alloy, cobalt-chromium alloy, nickel-cobalt alloy, stainless steel, and DFT. Thus, when the positioning part 120 is compressed within the inner cavity 21 of the microcatheter 20, the outer wall of the positioning part 120 makes frictional contact with the cavity wall of the inner cavity 21 under its own elastic force. Furthermore, the positioning part 120 expands automatically after being detached from the microcatheter 20, requiring no further operation, making it simple and convenient to use.

[0054] More preferably, the cross-section of the positioning part 120 gradually increases from the proximal end to the distal end. When the positioning part 120 detaches from the microcatheter 120 and expands, the outer surface of the distal portion of the sidewall of the positioning part 120 abuts against the tumor wall around the tumor neck opening. At the same time, the inner surface of this portion of the sidewall is squeezed by the embolization spring coil 200 in the accommodating cavity 111 of the balloon 110. That is, the distal portion of the sidewall of the positioning part 120 is clamped and positioned, thereby positioning the positioning part 120 at the tumor neck opening and covering a portion of the tumor neck opening with the proximal portion of the sidewall of the positioning part 120.

[0055] Optionally, the contrast agent includes, but is not limited to, any one of iopromide (Ulvitin), iohexol (Shuangbei), meglumine diatrizoate, sodium diatrizoate, iodized oil, and iodixanol (Iodine). Furthermore, to ensure that the balloon 110 can smoothly extend out of the inner cavity 21 and expand under the propulsion of the contrast agent, the membrane material used to manufacture the balloon 110 is preferably a non-elastic membrane, to avoid the membrane material being in a contracted state within the inner cavity 21, which would hinder the entry of the contrast agent into the receiving cavity 111.

[0056] In addition, in this embodiment, the wall thickness of the membrane material used to manufacture the balloon 10 is 0.1mm to 0.5mm. Taking the balloon 110 expanded into a spherical shape as an example, the outer diameter of the balloon 110 is 5mm to 30mm, preferably 8mm to 24mm. The maximum inner diameter D1 (i.e., the distal inner diameter) of the positioning part 120 is greater than or equal to the diameter of the first opening 112, so that the distal end face of the positioning part 120 can surround the first opening 112. The maximum inner diameter D1 of the positioning part 120 can be 1mm to 2mm. The minimum inner diameter D2 (i.e., the proximal inner diameter) of the positioning part 120 should be greater than the outer diameter of the embolization spring coil 200. The minimum inner diameter D2 of the positioning part 120 can be 0.5mm to 1mm. The outer diameter of the embolization spring coil 200 is 0.01 inch to 0.017 inch.

[0057] The positioning part 120 has multiple pores formed on its sidewall, and the area of ​​all the pores accounts for 20% to 25% of the area of ​​the sidewall of the positioning part 120. That is, the metal coverage of the positioning part 120 reaches 75% to 80%. A higher metal coverage can reduce the amount of blood entering the aneurysm cavity, alter hemodynamics, and facilitate the reconstruction of the aneurysm-bearing artery. Figures 4 to 6 As shown, the positioning part 120 is preferably formed by cross-weaving multiple strands of filaments, so that when the positioning part 120 expands, the multiple strands of filaments can slide along the tumor wall and fit against the tumor wall. The number of filaments can be 24 to 96.

[0058] Furthermore, the embolization spring coil 200 includes a spring coil body 210, which is formed by shaping a primary coil according to a target shape. The primary coil is a cylindrical helical spring structure formed by spirally winding wire around a central axis. When the embolization spring coil 200 is straightened, the spring coil body 210 takes on the form of a cylindrical helical spring structure. The outer diameter of the aforementioned embolization spring coil 200 refers to the outer diameter of the cylindrical helical spring. The diameter of the wire is 0.0009 inch to 0.0015 inch, and when the embolization spring coil 200 is straightened, its length is 10mm to 1000mm, preferably 40mm to 70mm.

[0059] Furthermore, this embodiment of the invention also provides a medical implant, which is the aforementioned medical implant 100.

[0060] Furthermore, this embodiment of the invention also provides a medical kit, which includes the aforementioned medical implant assembly and microcatheter 20. The medical kit is configured such that the medical implant 100 is compressed within the lumen 21 and is axially movable along the lumen 21. The medical kit is also configured such that when the balloon 110 extends from the distal end of the lumen and is in an inflated state, and the positioning portion 120 is located at the distal end of the lumen 21, the embolic coil 200 is inserted into the receiving cavity 111 along the lumen 21.

[0061] While the present invention has been disclosed above, it is not limited thereto. Those skilled in the art can make various modifications and variations to the present invention without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, the present invention also intends to include such modifications and variations.

Claims

1. A medical implant, characterized in that, The device includes a balloon and a positioning part; the balloon is made of a biodegradable material; the balloon has a receiving cavity, and the proximal wall of the balloon is provided with a first opening communicating with the receiving cavity; the positioning part has a delivery channel extending through the axis, the distal end of the positioning part is connected to the first opening of the balloon, and the delivery channel communicates with the receiving cavity; the cross-section of the positioning part gradually increases from the proximal end to the distal end, and multiple pores are formed on the sidewall of the positioning part, wherein in the expanded state, the sum of the areas of all the pores accounts for 20% to 25% of the area of ​​the sidewall of the positioning part; The medical implant is used to be compressed within the lumen of a microcatheter and is configured to be movable along the axial direction of the microcatheter, with the outer wall of the positioning portion in frictional contact with the inner wall of the microcatheter. The medical implant is also used for implantation inside a target object having a second opening, and the positioning part is configured to be positioned at the second opening and cover a portion of the second opening.

2. The medical implant according to claim 1, characterized in that, The membrane material used to make the balloon is a non-elastic membrane; and / or, the positioning part is a self-expanding structural component.

3. The medical implant according to claim 1, characterized in that, The balloon is made of any one of polylactic acid, polyglycolic acid, polyurethane, or polylactic acid-glycolic acid copolymer.

4. A medical implant component, characterized in that, The invention includes a medical implant and an embolization coil as described in any one of claims 1-3, the embolization coil being made of a biodegradable material and used to fill the receiving cavity of the balloon.

5. The medical implant component according to claim 4, characterized in that, The embolization spring coil is made of any one of polylactic acid, polyglycolic acid, polyurethane, or polylactic acid-glycolic acid copolymer.

6. The medical implant component according to claim 4, characterized in that, The maximum inner diameter of the positioning part is greater than or equal to the diameter of the first opening, the minimum inner diameter of the positioning part is less than or equal to the diameter of the first opening, and the outer diameter of the plug spring coil is less than the minimum inner diameter of the positioning part.

7. The medical implant component according to claim 6, characterized in that, The maximum inner diameter of the positioning part is 1mm to 2mm, the minimum inner diameter of the positioning part is 0.5mm to 1mm, and the outer diameter of the plug spring coil is 0.01 inch to 0.017 inch.

8. A medical kit, characterized in that, Includes microcatheters and medical implant components as described in any one of claims 4-7; The medical kit is configured such that the medical implant is compressed within the lumen of the microcatheter, the medical implant is movable along the axial direction of the microcatheter, and the outer surface of the positioning portion is in frictional contact with the inner wall of the microcatheter. The medical kit is also configured such that when the balloon extends from the lumen of the microcatheter and is in an expanded state, and the positioning portion is located at the distal end of the lumen of the microcatheter, the embolic coil is delivered along the lumen of the microcatheter to the receiving cavity of the balloon.

9. The medical kit according to claim 8, characterized in that, The medical kit also includes a contrast agent for injecting the balloon along the lumen of the microcatheter, pushing the balloon out of the microcatheter, and inflating the balloon.

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