A microcatheter adapter

Abstract

This utility model discloses a microcatheter adapter, including a microcatheter, an adapter connection component, and a syringe. One end of the adapter connection component is connected to one end of the microcatheter, and the other end of the adapter connection component is connected to one end of the syringe. In this utility model, the adapter connection component achieves a coaxial connection between the microcatheter and the syringe. The component includes an adapter seat, a microcatheter connection lug, a syringe connection lug, and a needle at the axial center. The components are modularly integrated, eliminating the need for complex assembly and facilitating rapid clinical operation. The adapter seat is made of polypropylene or polytetrafluoroethylene (PTFE), materials that have good chemical resistance to DMSO, avoiding the swelling and cracking problems of traditional PC materials. The needle is made of a DMSO-resistant material, forming the core channel for embolic agent delivery. This ensures that DMSO and its carrier embolic agent only contact the needle, blocking direct contact with the adapter seat and structurally isolating corrosion risks. This design is simple, efficient, and practical.

Description

Technical Field

[0001] This utility model relates to a medical device, specifically a microcatheter adapter, belonging to the field of medical device technology. Background Technology

[0002] In neurointerventional surgery, microcatheters are widely used as the core device for delivering liquid embolic agents in the treatment of vascular diseases such as intracranial aneurysms and arteriovenous malformations. Typical liquid embolic agents such as ONYX and PHIL use dimethyl sulfoxide (DMSO) as a solvent or carrier, utilizing its good fluidity and embolic properties to achieve precise embolization.

[0003] However, current microcatheter adapters still have certain problems. For example, in the catheter with a low-resistance septum disclosed in publication number CN1845768A, although the catheter fittings are made of thermoplastic polyurethane, which can improve the success rate of intravenous insertion, the material selection of the microcatheter seat, the connecting component between the microcatheter and the delivery system, directly affects the safety of the operation and the reliability of the instrument in this technical solution and most current technical solutions.

[0004] Currently, most clinically used microcatheter seats are made of polycarbonate (PC), which has the advantages of high mechanical strength and moderate cost. However, PC has significant compatibility issues with DMSO. For example, DMSO has strong solubility and corrosiveness to PC. When embolic agents are delivered through microcatheters, DMSO will chemically react with the PC catheter seat, causing irreversible damage such as swelling and cracking. This damage can lead to failure of the catheter seat seal and even instrument breakage during surgery, directly affecting the stability of the procedure. Damage to the catheter seat structure can also lead to leakage of embolic agents, which may contaminate the surgical field and interfere with the surgeon's judgment of vascular structure. Furthermore, leakage of embolic agents can lead to insufficient embolic dosage or abnormal distribution, increasing the risk of embolization failure and even causing serious complications such as unexpected embolization. To avoid corrosion of PC by DMSO, microcatheters need to be replaced frequently in clinical practice, leading to increased consumption of consumables and a more significant cost burden. Utility Model Content

[0005] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings of existing technologies by proposing a microcatheter adapter.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A microcatheter adapter includes a microcatheter, an adapter connection component, and a syringe, wherein one end of the adapter connection component is connected to one end of the microcatheter, and the other end of the adapter connection component is connected to one end of the syringe. The adapter connection assembly includes an adapter base, a microcatheter connection lug, a syringe connection lug, and a needle. The adapter base is cylindrical in shape, and the microcatheter connection lug is coaxially fixed at one end of the adapter base and connected to the microcatheter. The syringe connection lug is coaxially fixed at the other end of the adapter base and connected to the syringe. The needle is located at the axis of the adapter base, and its two ends are connected to the microcatheter connection lug and the syringe connection lug, respectively.

[0007] As a further improvement of this utility model: the adapter base is made of polypropylene or polytetrafluoroethylene, and the needle is made of DMSO-resistant material to form a cylindrical structure.

[0008] As a further improvement of this utility model: the needle and the adapter seat are seamlessly bonded together by an adhesive layer, and the adhesive layer is medical-grade epoxy resin glue.

[0009] As a further improvement of this utility model: a threaded locking structure is provided on the outer wall of the end of the microcatheter connecting Luer away from the adapter seat, and the microcatheter connecting Luer is connected and locked to the microcatheter through the threaded locking structure.

[0010] As a further improvement of this utility model: the outer wall of the adapter seat is provided with anti-slip teeth, and multiple anti-slip teeth are equidistantly arranged along the circumference of the adapter seat and combined to form a ring-shaped structure.

[0011] As a further improvement of this utility model, the inner wall of the needle is polished.

[0012] The beneficial effects of this utility model are: In this invention, a coaxial connection between a microcatheter and a syringe is achieved through an adapter connection assembly. The assembly includes an adapter seat, a microcatheter connection lug, a syringe connection lug, and a needle at the axial center. Each component is modularly integrated, eliminating the need for complex assembly and facilitating rapid clinical operation. The adapter seat is made of polypropylene or polytetrafluoroethylene, which has good chemical resistance to DMSO, avoiding the swelling and cracking problems of traditional PC materials. The needle is made of a DMSO-resistant material, forming the core channel for embolization agent delivery. This ensures that DMSO and its carrier embolization agent only contact the needle, blocking direct contact with the adapter seat and structurally isolating the risk of corrosion. The needle and adapter seat are seamlessly bonded together with a medical-grade epoxy resin adhesive layer, forming a reliable sealing structure that prevents embolization agent leakage, reduces surgical field contamination and the risk of embolization failure, and also prevents operational hazards such as instrument breakage. It is simple, efficient, and practical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the structure of the adapter connection component of this utility model; Figure 4 This is a schematic diagram of the adapter holder and its connection structure of this utility model.

[0014] In the diagram: 1. Microcatheter, 2. Adapter connector, 21. Adapter base, 22. Microcatheter connection lug, 23. Syringe connection lug, 24. Needle, 25. Adhesive layer, 26. Threaded locking structure, 27. Anti-slip teeth, 3. Syringe. Detailed Implementation

[0015] 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.

[0016] Example 1, as Figures 1 to 4 As shown, a microcatheter adapter includes a microcatheter 1, an adapter connection component 2, and a syringe 3. One end of the adapter connection component 2 is connected to one end of the microcatheter 1, and the other end of the adapter connection component 2 is connected to one end of the syringe 3. The adapter connection assembly 2 includes an adapter base 21, a microcatheter connection lug 22, a syringe connection lug 23, and a needle 24. The adapter base 21 has a cylindrical structure, and the microcatheter connection lug 22 is coaxially fixed at one end of the adapter base 21 and connected to the microcatheter 1. The syringe connection lug 23 is coaxially fixed at the other end of the adapter base 21 and connected to the syringe 3. The needle 24 is located at the axis of the adapter base 21, and its two ends are connected to the microcatheter connection lug 22 and the syringe connection lug 23, respectively. The adapter base 21 is made of polypropylene (PP) or polytetrafluoroethylene (PTFE), and the needle 24 is made of DMSO-resistant material to form a cylindrical structure. The needle 24 and the adapter base 21 are seamlessly bonded together by an adhesive layer 25, which is a medical-grade epoxy resin adhesive.

[0017] In this invention, the coaxial connection between the microcatheter 1 and the syringe 3 is achieved through the adapter connection component 2. The component includes an adapter seat 21, a microcatheter connection lug 22, a syringe connection lug 23, and a needle 24 at the axis. The components are modularly integrated, eliminating the need for complex assembly and facilitating rapid clinical operation. The adapter seat 21 is made of polypropylene (PP) or polytetrafluoroethylene (PTFE), which has good chemical resistance to DMSO and avoids the swelling and cracking problems of traditional PC materials. The needle 24 is made of a DMSO-resistant material, forming the core channel for embolization delivery. This ensures that DMSO and its carrier embolization agent only contact the needle 24, blocking direct contact with the adapter seat 21 and structurally isolating the risk of corrosion. The needle 24 and the adapter seat 21 are seamlessly bonded by an adhesive layer 25 made of medical-grade epoxy resin, forming a reliable sealing structure to prevent embolization agent leakage, reduce surgical field contamination and the risk of embolization failure, and prevent operational hazards such as instrument breakage. It is simple, efficient, and practical.

[0018] Example 2, as Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes: The outer wall of the microcatheter connection Luer 22 away from the adapter seat 21 is provided with a threaded locking structure 26, and the microcatheter connection Luer 22 is connected and locked to the microcatheter 1 through the threaded locking structure 26, which realizes the tight fixation of the microcatheter 1 and the adapter connection component 2, avoids loosening or falling off due to external force during the operation, ensures connection stability, and facilitates quick installation and removal, improving operation efficiency.

[0019] The outer wall of the adapter seat 21 is provided with anti-slip teeth 27. Multiple anti-slip teeth 27 are arranged at equal intervals along the circumference of the adapter seat 21 and are combined to form a ring structure, which increases the friction when the operator holds the adapter seat 21 and effectively prevents slippage when twisting the adapter seat 21 due to sweaty hands during operation.

[0020] The inner wall of the needle 24 is polished to reduce the flow resistance of the liquid embolic agent during delivery, avoid embolic agent residue or unstable flow rate caused by rough inner wall, ensure smooth delivery and accurate dosage of embolic agent, and reduce the risk of contamination of embolic agent by impurities on the inner wall, thereby improving the safety of the operation.

[0021] When using this medical device, the adapter connection component 2 is first connected to the microcatheter 1 via the microcatheter connection lug 22, and to the syringe 3 via the syringe connection lug 23, forming an embolic agent delivery pathway of "syringe 3 → adapter connection component 2 → microcatheter 1". The needle 24 is located at the axis of the adapter seat 21, serving as the core delivery channel for the embolic agent. Its two ends are connected to the microcatheter connection lug 22 and the syringe connection lug 23, respectively, ensuring that the liquid embolic agent containing DMSO flows stably along the coaxial path. After the connection is completed, the operator can accurately control the dosage and delivery speed of the embolic agent, achieving safe and accurate delivery from the microcatheter 1 to the syringe 3, and finally completing the targeted embolization operation.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A microcatheter adapter, comprising a microcatheter (1), an adapter connection assembly (2), and a syringe (3), characterized in that, One end of the adapter connection component (2) is connected to one end of the microcatheter (1), and the other end of the adapter connection component (2) is connected to one end of the syringe (3); The adapter connection assembly (2) includes an adapter seat (21), a microcatheter connection lug (22), a syringe connection lug (23), and a needle (24). The adapter seat (21) is cylindrical in shape. The microcatheter connection lug (22) is coaxially fixed at one end of the adapter seat (21) and connected to the microcatheter (1). The syringe connection lug (23) is coaxially fixed at the other end of the adapter seat (21) and connected to the syringe (3). The needle (24) is located at the axis of the adapter seat (21) and its two ends are connected to the microcatheter connection lug (22) and the syringe connection lug (23), respectively.

2. A microcatheter adapter according to claim 1, characterized in that: The adapter base (21) is made of polypropylene (PP) or polytetrafluoroethylene (PTFE), and the needle (24) is made of DMSO-resistant material to form a cylindrical structure.

3. A microcatheter adapter according to claim 1, characterized in that: The needle (24) and the adapter seat (21) are seamlessly bonded together by an adhesive layer (25), and the adhesive layer (25) is medical grade epoxy resin glue.

4. A microcatheter adapter according to claim 1, characterized in that: The outer wall of the microcatheter connecting lug (22) away from the adapter seat (21) is provided with a threaded locking structure (26), and the microcatheter connecting lug (22) is connected and locked to the microcatheter (1) through the threaded locking structure (26).

5. A microcatheter adapter according to claim 1, characterized in that: The adapter seat (21) is provided with anti-slip teeth (27) on its outer wall. Multiple anti-slip teeth (27) are provided at equal intervals along the circumference of the adapter seat (21) and are combined to form a ring structure.

6. A microcatheter adapter according to claim 1, characterized in that: The inner wall of the needle (24) is polished.

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