Double-cavity reducing micro catheter

Abstract

The utility model provides a double-cavity reducing microcatheter, which relates to the catheter field, and comprises a double-cavity microcatheter, a three-way catheter seat and a TPU (thermoplastic polyurethane) tube, the three-way catheter seat is arranged at the right end of the double-cavity microcatheter, the TPU tube is arranged at the right end of the double-cavity microcatheter, and an upper cavity is arranged inside the double-cavity microcatheter. The upper cavity and the lower cavity of the double-cavity reducing micro catheter are independent channels, different liquids or substances can be transmitted respectively, and when angiography needs to be carried out on a blood vessel to determine a lesion position, a contrast agent can be injected into the upper cavity through an external device connected with the upper cavity, then flows to the far end of the catheter along the upper cavity under the action of pressure and enters a target blood vessel part. When medicine treatment needs to be carried out on the diseased region, medicine can be injected into the lower cavity through an injector and other devices connected with the lower cavity and accurately conveyed to the diseased region to play a treatment role, the double-cavity micro catheter can convey different liquid or instruments at the same time, the catheter does not need to be frequently replaced or a guide wire does not need to be frequently withdrawn, and therefore the operation process is greatly simplified.

Description

Technical Field

[0001] This utility model relates to a dual-lumen variable diameter microcatheter, belonging to the field of catheters. Background Technology

[0002] In today's medical field, minimally invasive surgery and interventional diagnostic technology are booming. Microcatheters, as key instruments, play an irreplaceable role. However, existing microcatheter technology still has many areas for improvement, especially the single-lumen microcatheters that dominate the market. The operation of single-lumen microcatheters places stringent demands on the professional skills and experience of doctors. Due to their single function, in complex surgical scenarios, doctors often need to rely on superb techniques and rich experience to compensate for the shortcomings of the instrument itself, which undoubtedly greatly increases the difficulty and uncertainty of surgical operations.

[0003] In the common procedure of selective angiography, the limitations of single-lumen microcatheters are particularly prominent. To complete the angiography, the guidewire must first be withdrawn, a process that is not only cumbersome and complex but also significantly prolongs the operation time. For patients, the extended operation time means higher risks and greater pain, and also increases the probability of unexpected situations during the operation, such as vasospasm and thrombosis. At the same time, the single-lumen microcatheter's limited functionality not only reduces the efficiency of the operation but may also affect the accuracy and stability of the treatment effect due to the complexity of the operation, bringing many adverse factors to the patient's treatment prognosis. To address these issues, we provide a dual-lumen variable-diameter microcatheter. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a dual-lumen variable-diameter microcatheter, the specific technical solution of which is as follows:

[0005] A dual-lumen variable-diameter microcatheter includes a dual-lumen microcatheter, a three-way catheter seat, and a TPU tube. The three-way catheter seat is located at the right end of the dual-lumen microcatheter, and the TPU tube is located at the right end of the dual-lumen microcatheter. The dual-lumen microcatheter has an upper lumen and a lower lumen. A valve is fixedly connected to the left side of the lower lumen.

[0006] Preferably, the left end of the three-way catheter seat is connected to the right end of the double-lumen microcatheter.

[0007] Preferably, the right end of the TPU tube is connected to the left end of the dual-lumen microcatheter.

[0008] Preferably, both ends of the three-way conduit seat are threaded.

[0009] Preferably, the lower cavity is located below the upper cavity.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This dual-lumen variable-diameter microcatheter features independent upper and lower lumens, enabling the separate delivery of different liquids or substances. When angiography is needed to determine the location of a lesion, the contrast agent can be injected into the upper lumen via an external device connected to it. Under pressure, the contrast agent then flows along the upper lumen to the distal end of the catheter and enters the target blood vessel. When drug therapy is required, the medication can be injected into the lower lumen via a syringe or other device connected to it, and precisely delivered to the lesion to exert its therapeutic effect. The dual-lumen microcatheter can deliver different liquids or instruments simultaneously without frequent catheter changes or guidewire withdrawals, greatly simplifying the procedure and improving surgical efficiency. The valve controls the flow of the liquid. When the liquid flows from right to left, the valve allows the liquid to pass smoothly under normal operating conditions, enabling the liquid in the lower lumen to flow to the distal end of the catheter. When there is a risk of backflow, the valve automatically closes to prevent backflow, ensuring that the medication accurately reaches the target location, thus guaranteeing the effective treatment. Attached Figure Description

[0012] Figure 1 This is a front view of the three-way conduit seat of this utility model;

[0013] Figure 2 This is a front sectional view of the three-way guide tube seat of this utility model;

[0014] Figure 3 In the dual-lumen variable diameter microcatheter of this utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0015] Figure 4 This is a three-dimensional structural diagram of the valve in the dual-cavity variable diameter microcatheter of this utility model;

[0016] Figure 5 This is a front view of the valve in the dual-cavity variable diameter microcatheter of this utility model.

[0017] Figure descriptions: 1. Three-way catheter seat; 2. Double-lumen microcatheter; 3. TPU tube; 4. Valve; 5. Lower cavity; 6. Upper cavity. Detailed Implementation

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] 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.

[0020] Please see Figure 1-5 In this utility model, the dual-lumen variable diameter microcatheter includes a dual-lumen microcatheter 2, a three-way catheter seat 1, and a TPU tube 3. The three-way catheter seat 1 is located at the right end of the dual-lumen microcatheter 2, and the TPU tube 3 is located at the right end of the dual-lumen microcatheter 2. The dual-lumen microcatheter 2 has an upper cavity 6 inside and a lower cavity 5 inside. A valve 4 is fixedly connected to the left side of the lower cavity 5.

[0021] The left end of the three-way catheter hub 1 is connected to the right end of the double-lumen microcatheter 2. Using the three-way catheter hub 1, doctors can have more operational options and flexibility. The right end of the TPU tube 3 is connected to the left end of the double-lumen microcatheter 2. Using the TPU tube 3, the double-lumen microcatheter 2 can better follow the direction of the blood vessel and avoid damage to the blood vessel wall.

[0022] Both ends of the three-way catheter seat 1 are threaded, and the threaded connection makes the installation and disassembly of the device simple and quick. The lower cavity 5 is located below the upper cavity 6. The lower cavity 5 and the upper cavity 6 make the surgical process more compact and efficient.

[0023] The working principle of this utility model is as follows:

[0024] In use, the syringe containing contrast agent is connected to the corresponding port of the three-way catheter hub 1. Then, the syringe plunger is slowly pushed to inject the contrast agent into the upper cavity 6. Under pressure, the contrast agent flows along the upper cavity 6 through the double-lumen microcatheter 2 and enters the target blood vessel. The upper cavity 6 and lower cavity 5 in the double-lumen variable diameter microcatheter are independent channels, which can realize the separate delivery of different liquids or substances. When it is necessary to perform angiography to determine the location of the lesion, the contrast agent can be injected into the upper cavity 6 through an external device connected to the upper cavity 6. Then, under pressure, it flows along the upper cavity 6 to the distal end of the catheter and enters the target blood vessel. When it is necessary to treat the lesion with drugs, the drugs can be injected into the lower cavity 5 through a syringe or other device connected to the lower cavity 5 and accurately delivered to the lesion to exert a therapeutic effect. The valve 4 plays a role in controlling the flow of liquid. When the liquid flows from right to left, the valve 4 allows the liquid to pass smoothly under normal working conditions, so that the liquid in the lower cavity 5 can flow to the distal end of the catheter. When there is a risk of liquid backflow, the valve 4 will automatically close to prevent liquid backflow.

[0025] 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.

[0026] 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.

[0027] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A dual-lumen variable-diameter microcatheter, comprising a dual-lumen microcatheter (2), a three-way catheter seat (1), and a TPU tube (3), characterized in that: The three-way catheter seat (1) is located at the right end of the double-lumen microcatheter (2), the TPU tube (3) is located at the right end of the double-lumen microcatheter (2), the double-lumen microcatheter (2) has an upper cavity (6) inside, the double-lumen microcatheter (2) has a lower cavity (5) inside, and a valve (4) is fixedly connected to the left side of the lower cavity (5).

2. The dual-lumen variable diameter microcatheter according to claim 1, characterized in that: The left end of the three-way catheter seat (1) is connected to the right end of the double-lumen microcatheter (2).

3. The dual-lumen variable diameter microcatheter according to claim 1, characterized in that: The right end of the TPU tube (3) is connected to the left end of the double-lumen microcatheter (2).

4. The dual-lumen variable diameter microcatheter according to claim 1, characterized in that: Both ends of the three-way conduit seat (1) are threaded.

5. The dual-lumen variable diameter microcatheter according to claim 1, characterized in that: The lower cavity (5) is located below the upper cavity (6).

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