An integrated water-cooled microwave ablation catheter

Abstract

The utility model relates to the technical field of ablation needle, concretely relates to an integrated water -cooling microwave ablation catheter, include: ablation part, ablation part has the ablation end for ablation, and the connecting part of connecting in the ablation end, cable, connect on the connecting part, cooling part, cooling part is sleeved on the connecting part, and the isolation layer is equipped in the cooling part, and the cooling part internal space is divided into the first chamber and the second chamber of intercommunication, the cable passes through the second chamber and the one end of isolation layer forms the point contact or the line contact or does not contact, and the cooling water flows from the first chamber, and the second chamber flows out from the connecting part, in the utility model, through adopting integrated design, and discard traditional capillary cooling structure, the catheter structure is simplified, and the manufacturing complexity and cost are reduced, simultaneously, also avoided the breakage risk that capillary can exist to ensure the stable reliable cooling effect, improved the overall durability and security of catheter.

Description

Technical Field

[0001] This utility model relates to the field of ablation catheter technology, and in particular to an integrated water-cooled microwave ablation catheter. Background Technology

[0002] Microwave ablation, as a minimally invasive treatment method, has been widely used in fields such as tumor treatment and arrhythmia treatment. Its principle is to deliver microwave energy to the target tissue through a microwave ablation catheter, causing water molecules within the tissue to vibrate and generate heat through friction, thereby achieving the purpose of high-temperature inactivation of diseased tissue. During microwave ablation, a large amount of heat is generated in the ablation area. If heat cannot be dissipated effectively and in a timely manner, it will not only affect the ablation effect but may also cause thermal damage to surrounding normal tissues, increasing the risk of complications. Therefore, an effective cooling system is crucial to ensuring the safety and effectiveness of microwave ablation treatment.

[0003] Currently, water-cooled microwave ablation catheters are a commonly used cooling method. This involves installing cooling pipes inside the ablation catheter, using circulating coolant to remove the heat generated during the ablation process. However, existing water-cooled microwave ablation catheters have several problems with the installation of these cooling pipes. Traditional water-cooled microwave ablation catheters use wool tubing as the cooling conduit. However, due to the fragility of the material, the cooling conduit is easily damaged or deformed during insertion due to pressure and friction from the inner wall of the catheter or other components. Once the cooling conduit is damaged, coolant leakage can occur, not only causing the cooling system to fail and unable to effectively dissipate the heat generated during ablation, thus affecting the ablation effect, but also potentially leading to coolant entering human tissue and causing serious complications such as infection and thrombosis, posing a significant threat to the patient's health.

[0004] Therefore, this application develops an integrated water-cooled microwave ablation catheter to solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this invention is to provide an integrated water-cooled microwave ablation conduit to solve the problems of easy rupture and poor cooling effect of existing cooling pipes.

[0006] The technical solution of this utility model is: an integrated water-cooled microwave ablation catheter, comprising: The ablation section has an ablation end for ablation and a connecting portion connected to the ablation end; A cable is connected to the connector. The cooling section is sleeved on the connecting section. The cooling section has an isolation layer inside, which divides the internal space of the cooling section into a first chamber and a second chamber that are interconnected. The cable passes through the second chamber and forms point contact, line contact or no contact with one end of the isolation layer. Cooling water flows in from the first chamber and flows out from the second chamber through the connecting section.

[0007] Preferably, the isolation layer is arc-shaped, and the arc-shaped opening faces the direction of the first chamber, so that the cable makes point contact with one end of the isolation layer and bends through the second chamber.

[0008] Preferably, the isolation layer is arc-shaped, and the arc-shaped opening faces the direction of the second chamber, so that the cable passes through the second chamber and makes line contact with the inner wall surface of the second chamber.

[0009] Preferably, the isolation layer is arc-shaped, and the arc-shaped opening faces the direction of the second chamber, so that the cable passes through the second chamber without contacting the inner wall of the second chamber.

[0010] Preferably, the cooling section further includes a communicating chamber that connects the first chamber and the second chamber. The connecting portion is located inside the communicating chamber, and there is a gap between the outer wall surface of the connecting portion and the inner wall surface of the communicating chamber, allowing coolant to flow on the outer wall surface of the connecting portion.

[0011] Preferably, the cross-sectional area of ​​the cable is smaller than the cross-sectional area of ​​the second chamber, so that the cable cannot fill the space of the second chamber.

[0012] Compared with the prior art, the advantages of this utility model are: (1) By adopting an integrated design and abandoning the traditional capillary cooling structure, the conduit structure is simplified, reducing manufacturing complexity and cost. At the same time, it avoids the risk of capillary rupture, thereby ensuring stable and reliable cooling effect and improving the overall durability and safety of the conduit. (2) The cooling water not only flows through the end of the ablation section, but also flows around the outer wall of the ablation section, which realizes the comprehensive cooling of the ablation section, greatly improves the cooling effect, helps to maintain the temperature stability of the ablation section during the working process, and improves the accuracy and safety of ablation treatment. (3) By setting up an isolation layer, the actual cross-sectional areas of the first chamber and the second chamber are made to be close to equal, thereby improving the cooling effect. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1This is a perspective view of an integrated water-cooled microwave ablation catheter according to the present invention; Figure 2 This is a side sectional view of the ablation catheter in Embodiment 1 of this utility model; Figure 3 This is a diagram showing the positional relationship between the first chamber, the second chamber, and the cable in Embodiment 1 of this utility model; Figure 4 This is a side sectional view of the ablation catheter in Embodiment 2 of this utility model; Figure 5 This is a diagram showing the positional relationship between the first chamber, the second chamber, and the cable in Embodiment 2 of this utility model; Figure 6 This is a side sectional view of the ablation catheter in Embodiment 3 of this utility model; Figure 7 This is a diagram showing the positional relationship between the first chamber, the second chamber, and the cable in Embodiment 2 of this utility model.

[0014] The components are: 1. Ablation section; 11. Ablation end; 12. Connecting section; 2. Cable; 3. Cooling section; 31. First chamber; 32. Second chamber; 33. Connecting chamber; 4. Isolation layer. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to specific embodiments: like Figures 1-2 As shown, an integrated water-cooled microwave ablation catheter includes an ablation section 1, a cable 2, and a cooling section 3. The ablation section 1 includes an ablation end 11 for performing the ablation operation and a connecting section 12 connected to the ablation end 11. The cable 2 is connected to the connecting section 12 and is responsible for transmitting energy to the ablation section 1, thereby achieving the ablation function on the target tissue. The cooling section 3 is sleeved on the outer wall of the connecting section 12, and an isolation layer 4 is provided inside the cooling section 3. This isolation layer 4 divides the internal space of the cooling section 3 into a first chamber 31 and a second chamber 32 that are interconnected. In actual operation, cooling water flows in from the first chamber 31, flows through the connecting section 12, and then flows out from the second chamber 32, forming a complete cooling water circulation system. This design effectively cools the ablation section 1 without the need for a capillary structure, simplifying the catheter construction and avoiding the risk of capillary rupture, thus ensuring stable and reliable cooling performance.

[0016] In Example 1, as Figures 2-3As shown, the isolation layer 4 has an arc-shaped design, with its arc-shaped opening facing the first chamber 31. This ensures that when the cable 2 passes through the second chamber 32, it only makes point contact with one end of the arc-shaped opening of the isolation layer 4. Subsequently, the cable 2 bends within the second chamber 32 and passes through smoothly. This method ensures the stability of the contact between the cable 2 and the isolation layer 4, effectively utilizes the space of the second chamber 32, reduces the inlet area occupied by the cable 2 in the second chamber 32, facilitates the smooth flow of cooling water within the chamber, and improves the overall cooling effect.

[0017] In Example 2, as Figures 4-5 As shown, the isolation layer 4 has an arc-shaped structure, and its arc-shaped opening faces the second chamber 32. In this embodiment, the cable 2 can smoothly pass through the second chamber 32 and form a line contact with the inner wall of the second chamber 32. In this way, the accommodating space of the first chamber 31 is reduced, and the accommodating space of the second chamber 32 is increased. When the cable 2 passes through the second chamber 32, only the outer wall of the cable 2 forms a line contact with the inner wall of the second chamber 32. The cable 2 does not block the area of ​​the inlet of the second chamber 32 on a large scale. On the contrary, it increases the area of ​​the second chamber 32 and accelerates the flow rate of cooling water.

[0018] In Example 3, as Figures 6-7 As shown, the isolation layer 4 adopts an arc-shaped structure, and the opening of the arc faces the second chamber 32. In this embodiment, the cable 2 can pass smoothly through the second chamber 32 and remain in contact with the inner wall of the second chamber 32 without bending.

[0019] To further explain, when cooling water flows from the first chamber 31 to the second chamber 32, the flow is smoother and the cooling effect is better when the cross-sectional areas of the first chamber 31 and the second chamber 32 are equal. When the cross-sectional area of ​​the first chamber 31 is larger than that of the second chamber 32, the inflow rate is faster and the outflow rate is slower. When the difference is large, it can lead to blockage of the cooling water, preventing it from being discharged in time. Conversely, when the cross-sectional area of ​​the first chamber 31 is smaller than that of the second chamber 32, the inflow rate is slower. The rapid outflow of cooling water prevents the cooling water from fully filling the area where the connection part 12 is located, resulting in poor cooling effect. Furthermore, because the second chamber 32 contains the cable 2, the original cross-sectional area of ​​the second chamber 32 is filled by the cable 2, making the actual cross-sectional area of ​​the second chamber 32 smaller. Therefore, in embodiment two, the arc-shaped opening of the isolation layer 4 faces the second chamber 32, increasing the cross-sectional area of ​​the second chamber 32 and decreasing the cross-sectional area of ​​the first chamber 31, thereby making the cross-sectional areas of the two chambers closer to being equal and achieving a better cooling effect.

[0020] Specifically, in Embodiment 1, Embodiment 2 and Embodiment 3, when cable 2 enters the second chamber 32, its cross-sectional area is always smaller than that of the second chamber 32, thereby ensuring that the cooling water can flow smoothly through the second chamber 32 without being blocked by cable 2, thus achieving smooth circulation of cooling water and achieving the expected cooling effect.

[0021] Furthermore, the cooling section 3 also includes a connecting chamber 33, which connects the first chamber 31 and the second chamber 32. The connection of the ablation section 1 is located inside the connecting chamber 33, and there is a certain gap between the outer wall surface of the connecting part 12 and the inner wall surface of the connecting chamber 33, so that the coolant can flow smoothly around the outer wall surface of the connecting part 12, thereby effectively improving the cooling efficiency and ensuring the temperature stability of the ablation section 1 during operation. Traditional cooling methods only cool the end of the ablation section 1, while in this application, cooling is achieved not only at the end but also on the outer wall surface of the ablation section 1, greatly improving the cooling effect. In practical applications, due to the better cooling effect, the traditional point ablation can be changed to continuous ablation, increasing the ablation efficiency.

[0022] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. An integrated water-cooled microwave ablation catheter, characterized in that, include: The ablation section (1) has an ablation end (11) for ablation and a connection section (12) connected to the ablation end (11). Cable (2) is connected to the connecting part (12); Cooling section (3) is sleeved on the connecting section (12). The cooling section (3) is provided with an isolation layer (4) to divide the internal space of the cooling section (3) into a first chamber (31) and a second chamber (32) that are interconnected. The cable (2) passes through the second chamber (32) and forms a point contact, line contact or no contact with one end of the isolation layer (4). Cooling water flows in from the first chamber (31) and flows out from the second chamber (32) through the connecting section (12).

2. The integrated water-cooled microwave ablation catheter according to claim 1, characterized in that: The isolation layer (4) is arc-shaped, and the arc-shaped opening is directed toward the first chamber (31), so that the cable (2) makes point contact with one end of the isolation layer (4) and bends through the second chamber (32).

3. The integrated water-cooled microwave ablation catheter according to claim 1, characterized in that: The isolation layer (4) is arc-shaped, and the arc-shaped opening is oriented toward the second chamber (32), so that the cable (2) passes through the second chamber (32) and makes line contact with the inner wall surface of the second chamber (32).

4. The integrated water-cooled microwave ablation catheter according to claim 1, characterized in that: The isolation layer (4) is arc-shaped, and the arc opening is oriented toward the second chamber (32), so that the cable (2) passes through the second chamber (32) and does not contact the inner wall of the second chamber (32).

5. The integrated water-cooled microwave ablation catheter according to claim 1, characterized in that: The cooling section (3) further includes a connecting chamber (33) that connects the first chamber (31) and the second chamber (32). The connecting section (12) is located inside the connecting chamber (33), and there is a gap between the outer wall of the connecting section (12) and the inner wall of the connecting chamber (33), so that the coolant flows on the outer wall of the connecting section (12).

6. The integrated water-cooled microwave ablation catheter according to claim 1, characterized in that: The cross-sectional area of ​​the cable (2) is smaller than that of the second chamber (32), so that the cable (2) cannot fill the space of the second chamber (32).

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