Efficient water-cooling circulating radiofrequency ablation needle

Abstract

The invention discloses an efficient water-cooling circulating radiofrequency ablation needle which comprises a radiofrequency ablation needle body, an ablation needle handle, a Y-shaped water tank, an outflow pipe, an external outflow pipe, an inflow pipe, an external inflow pipe, an inner needle cooling liquid inflow pipe, a temperature thermocouple, an inner needle galvanic couple wire, a radiofrequency needle positive electrode connecting wire, a negative electrode patch and the like. According to the invention, more efficient water-cooling circulating cooling of the tip of the radio frequency needle is realized by adopting an efficient convection water-cooling circulating structure design; the needle tip part of the radiofrequency ablation electrode adopts a novel development structure or an ultrasonic development coating, so that the development of the needle tip part of the electrode under ultrasonic guidance can be remarkably improved; a spiral nut double-sealing-ring buckle structure is innovatively designed for the water circulation Luer taper of the radiofrequency ablation needle, and the sealing performance and stability of a water pipe connector are remarkably improved; the radiofrequency ablation electrode needle has an efficient and stable water-cooling circulation system and development positioning.

Description

Technical Field

[0001] The invention belongs to the technical field of development of medical surgical interventional instruments and relates to a high-efficiency water-cooled circulating radiofrequency ablation needle. Background Art

[0002] Radiofrequency ablation, as a new type of minimally invasive interventional treatment, is widely used in the clinical treatment of organs such as the liver, kidney, breast, and thyroid. The principle of radiofrequency ablation is to use high-frequency current to insert into the tissue to be ablated (hypertrophic myocardium, tumor). The electrode causes the surrounding tissue ions acted by the current to produce high-frequency oscillations, and the mutual friction and collision generate heat, heating the area to be ablated to above 80°C to the effective treatment temperature range, and maintaining it for a certain period of time to kill the diseased tissue cells. The ablated necrotic tissue is gradually absorbed and disappears in the later recovery process of the body. Based on the advantages of radiofrequency ablation treatment such as high safety and low trauma, it is widely used in clinical treatment.

[0003] However, the common water-cooled circulating radiofrequency ablation single needle in the market has the following problems in the clinical treatment of hypertrophic cardiomyopathy / tumor ablation:

[0004] (1) Currently, the common single-needle RF ablation needles on the market include non-water-cooled RF ablation needles, which have a small ablation range. When the power is increased, the needle tip heats up quickly. Since there is no water-cooled cooling effect at the RF needle tip, the tissue is prone to carbonization, which in turn causes the tissue to have a higher impedance. The transmission of current to tissues farther away is limited, resulting in the actual ablation range being smaller than the intended ablation range. At the same time, the high impedance caused by carbonized tissue is likely to cause the impedance program of the RF ablation system to determine that it is dormant, causing the electrode needle to have more frequent "false dormancy" situations, resulting in an excessively small ablation range. The common single-needle RF ablation needle with a water-cooled circulation system on the market only retains the water circulation pipe in and out of the cold circulation in the electrode needle water tank setting, and relies on the pressure of the water-cooled circulation pump to promote the cooling of the water circulation. The water circulation at the RF needle tip is poor due to the low water pressure. Therefore, when the power at the RF needle tip increases quickly, carbonization is likely to occur, resulting in a deviation in the ablation range. At the same time, the carbonized tissue is absorbed slowly, resulting in a prolonged recovery time for patients after surgery.

[0005] (2) To ensure minimally invasive characteristics of ultrasound-guided radiofrequency ablation electrode needles, conventionally prepared electrode needles have a relatively thin diameter (≤17G). However, under the premise of ensuring that the diameter of the radiofrequency needle / biopsy needle is relatively thin, the needle tip is often not clearly visualized during real-time guidance of ultrasound interventional surgery. This can easily cause position deviation during puncture and needle track change during radiofrequency ablation surgery, leading to problems such as perforation, bleeding, and ablation position deviation. Effective treatment of the intended ablation area (tumor / hypertrophic myocardial tissue) cannot be achieved, and additional damage is caused to normal tissue cells. Even puncture differences can easily pose a risk to the patient's life. Therefore, there is an urgent need for a method and technology that can improve the ultrasound visualization at the needle tip to improve the safety of radiofrequency needles.

[0006] (3) The water cooling circulation system is crucial for cooling the ablation needle when the radiofrequency ablation needle is working. However, the common problems when connecting the water inlet and outlet pipes of the Luer connector include water pipe leakage, poor sealing, and complex connection. Water pipe leakage during the ablation process can cause surgical risks such as short circuit and burns on the patient's electrode patch, which seriously affects the safety of the operation. Therefore, it is necessary to prepare a water cooling circulation connector with better sealing, high stability, and convenient operation to improve the safety of the operation.

[0007] Therefore, in radiofrequency ablation treatment of tumors and hypertrophic cardiomyopathy, there is an urgent need for a radiofrequency ablation needle with good water-cooling circulation effect, high stability and clear imaging. Summary of the invention

[0008] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high-efficiency water-cooled circulating radiofrequency ablation needle to solve the common clinical problems of the current conventional radiofrequency ablation needles, including excessive temperature at the ablation needle tip, leading to tissue carbonization, which in turn affects the ablation range and post-healing absorption of the patient; at the same time, when the radiofrequency needle tip is thin, it is easy to cause unclear imaging under ultrasound guidance, which in turn leads to ablation deviation or puncture complications; the guarantee of water pipe sealing provides more reliable stability guarantee for surgical treatment.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0010] A high-efficiency water-cooled circulation radiofrequency ablation needle, comprising a radiofrequency ablation needle, an ablation needle handle, a Y-shaped water tank, an outflow tube, an external outflow tube, an inflow tube, an external inflow tube, an inner needle coolant inflow tube, a temperature measuring thermocouple, an inner needle thermocouple wire, a radiofrequency needle positive electrode connecting wire, and a negative electrode sticker;

[0011] The front end of the radiofrequency ablation needle is a puncture tip, the rear end is connected to and extends into the ablation needle handle, the interior is a central channel, and the side wall is provided with a capillary cooling water flow channel connected front and back;

[0012] The Y-shaped water tank is arranged in the ablation needle handle, and the three ports of the Y-shaped water tank are interconnected. The first port of the Y-shaped water tank is connected to the rear end of the radiofrequency ablation needle, the second port is connected to the outflow tube, and the outflow tube is connected to the external outflow tube, and one end of the inflow tube is arranged at the third port, and the other end of the inflow tube is connected to the external inflow tube, and the external inflow tube is connected to the cooling liquid;

[0013] The inner needle cooling liquid inlet tube is arranged in the central channel of the radiofrequency ablation needle, one end of which is close to the puncture tip and the front water inlet of the capillary cooling water flow channel, and the other end extends into the Y-shaped water tank and is connected to the inlet tube; the annulus between the inner needle cooling liquid inlet tube and the inner wall of the radiofrequency ablation needle is a convection channel; after the cooling liquid enters the inner needle cooling liquid inlet tube through the inlet tube and flows out from the front end thereof, it returns through the capillary cooling water flow channel and the convection channel respectively and then flows out through the outflow tube;

[0014] The temperature measuring thermocouple is arranged at the front end of the inner needle coolant inflow tube, and the inner needle thermocouple wire is connected to the rear end of the inner needle coolant inflow tube;

[0015] One end of the radio frequency needle positive electrode connection line is connected to the electrode needle welding point on the radio frequency ablation needle, and the other end is connected to the host through the electrode needle host connector;

[0016] The negative electrode patch can be attached to a human body and connected to a negative electrode interface of a host through a negative electrode patch connecting connector.

[0017] The present invention also includes the following technical features:

[0018] Specifically, the external inlet pipe is provided with an inlet pipe water flow direction mark, and a water-cooled circulating peristaltic pump is installed at the mark. The water-cooled circulating peristaltic pump is provided with a peristaltic pump switch, a peristaltic pump water pipe installation direction mark and a peristaltic pump speed adjustment knob.

[0019] Specifically, an inverted pyramid enhanced development structure is provided on the front outer wall of the radiofrequency ablation needle, or an ultrasound enhanced development coating is provided on the front outer wall of the radiofrequency ablation needle.

[0020] Specifically, the outflow tube is connected to the spiral double-sealing ring snap-on Luer connector of the external outflow tube through a Luer connector, and the end of the external outflow tube is the outflow port.

[0021] Specifically, the inflow tube is connected to the Luer connector of the external inflow tube through a spiral double-sealing ring snap-on Luer connector, and the end of the external inflow tube is the inflow port.

[0022] Specifically, the outflow port and the inflow port are both arranged in a cooling liquid container, and an ice-water mixture is contained in the cooling liquid container.

[0023] Specifically, the joint of the spiral double-sealing ring snap-on Luer connector is provided with a double-layer sealing ring, a snap and a connecting thread in sequence. The connector is connected to its matching Luer connector through threads and snaps, and is sealed at the connection by a double-layer sealing ring.

[0024] Specifically, the negative electrode patch is connected to the negative electrode patch connecting connector via a negative electrode patch connecting clip.

[0025] Specifically, a water tank fixing slot is provided in the ablation needle handle to fix the Y-shaped water tank.

[0026] Specifically, an electrode needle fixing slot is further provided in the ablation needle handle to fix the radiofrequency ablation needle.

[0027] Compared with the prior art, the present invention has the following technical effects:

[0028] The present invention adopts a novel Y-shaped water tank convection structure design, a radiofrequency needle tip enhanced development structure or coating, a novel Luer connector design and other technical innovations to provide a radiofrequency ablation needle with good ablation characteristics. In the ablation treatment of hypertrophic / tumor patients, the present invention has the following advantages over the common radiofrequency ablation needles currently on the market:

[0029] The radiofrequency ablation electrode needle of the present invention can solve the problem of tissue carbonization during the ablation process. The core of the present invention is to realize sufficient water-cooled circulation convection cooling in the radiofrequency ablation needle cavity through the innovative design of a Y-shaped high-efficiency convection water-cooling circulation system, effectively avoiding the problem of carbonization of the target tissue caused by excessive temperature at the tip of the radiofrequency ablation electrode needle during surgery, avoiding the problems of ablation range deviation caused by carbonization and long absorption time after recovery of the patient, thereby improving the efficiency of surgery and the recovery effect of the patient.

[0030] The novel enhanced imaging technology of the radiofrequency ablation needle tip of the present invention can improve the positioning accuracy of the operator. The invention prepares an enhanced ultrasonic echo structure of an "inverted pyramid" structure at the needle tip, which can return more ultrasonic waves to the probe receiver; or adopts a foaming coating technology, which can significantly improve the ultrasonic imaging technology of the needle tip, improve the recognition of the needle tip during the operator's minimally invasive surgery with a fine needle, and improve the safety of the operation.

[0031] The water pipe connector of the present invention adopts a new structural design to better ensure the sealing and reliability of water circulation during surgery. Through the innovative design of the spiral nut double sealing ring buckle structure Luer connector, a double-layer sealing ring is used to better prevent the leakage of circulating water. The buckle structure design better connects the Luer male and female connectors to prevent the loosening and leakage of the connector under the impact of water pressure during a long surgical process, thereby improving the sealing and stability of the overall water circulation process.

[0032] The present invention has an innovative design of a Y-shaped high-efficiency convection water-cooling circulation water tank, an ultrasonic reflection "inverted pyramid" enhanced development structure or a foam-like enhanced development coating, and a new spiral nut double sealing ring buckle structure Luer connector design to prepare a device with high-efficiency water-cooling circulation to avoid tissue carbonization, ultrasonic development enhancement of the real-time position observation of the needle tip during surgery, and innovative design of the Luer connector to improve the water circulation sealing. The new high-efficiency water-cooling circulation radiofrequency electrode needle system provides a more efficient, accurate, safe, and stable ablation treatment in clinical applications. The radiofrequency ablation electrode needle system shows great clinical application prospects in the ablation treatment of hypertrophic cardiomyopathy and various tumors (heart, liver, breast, kidney, lung, uterine fibroids), thyroid nodules, vascular plaques and other tissues. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2 This is a schematic diagram of the connection between the radiofrequency ablation needle, the ablation needle handle and various pipelines of the present invention.

[0035] Figure 3 Detailed schematic diagram of the radiofrequency ablation needle and Y-shaped water tank of the present invention.

[0036] Figure 4 It is a schematic diagram of the external outflow pipe, the external inflow pipe and the negative electrode sticker of the present invention.

[0037] Figure 5 It is a schematic diagram of the enhanced development structure of the radiofrequency ablation needle tip of the present invention.

[0038] Figure 6 Schematic diagram of the spiral double sealing ring snap-on Luer connector and the matching Luer connector of the present invention.

[0039] Figure 7 It is a schematic diagram of the overall structure of the convection high-efficiency water-cooling cycle of the high-efficiency water-cooling cycle radiofrequency ablation needle of the present invention.

[0040] Figure 8 This is a schematic diagram of the cooling principle of the needle tip of the efficient water cooling circulation system during the ablation process of an embodiment of the present invention.

[0041] Fig. 9 This is a comparison of carbonization of necrotic area tissue in the liver ablation by high-efficiency water-cooled circulating radiofrequency in the embodiment of the present invention and that in the conventional radiofrequency ablation.

[0042] The meaning of each number in the figure is:

[0043] 1. Radiofrequency ablation needle, 2. Ablation needle handle, 3. Y-shaped water tank, 4. Outflow tube, 5. External outflow tube, 6. Inflow tube, 7. External inflow tube, 8. Inner needle coolant inflow tube, 9. Temperature measurement thermocouple, 10. Inner needle thermocouple wire, 11. Radiofrequency needle positive electrode connecting wire, 12. Negative electrode sticker, 13. Main unit, 14. Water-cooled circulating peristaltic pump, 15. Luer connector, 16. Spiral double sealing ring snap-on Luer connector, 17. Coolant container;

[0044] 1-1. puncture tip, 1-2. capillary cooling water flow channel, 1-3 convection channel, 1-4. enhanced development structure;

[0045] 2-1. Water tank fixing slot, 2-2. Electrode needle fixing slot;

[0046] 11-1. Electrode needle welding point, 11-2. Electrode needle host connector;

[0047] 12-1. Negative electrode connection connector; 12-2. Negative electrode connection clip

[0048] 14-1. Peristaltic pump switch, 14-2. Peristaltic pump water pipe installation direction mark, 14-3. Peristaltic pump speed adjustment knob;

[0049] 16-1. Double-layer sealing ring, 16-2. Buckle, 16-3. Connecting thread. DETAILED DESCRIPTION

[0050] The present invention provides a highly efficient water-cooled circulation radiofrequency ablation needle, which is used for surgical medical device interventional treatment of diseases such as hypertrophic cardiomyopathy and tumors, and mainly involves the following key points: a new type of highly efficient convection water-cooled circulation radiofrequency ablation system, a new type of electrode needle tip development structure design or ultrasonic development coating preparation, and a new type of water pipe connection lock joint structure design; the core innovation part of the present invention can realize highly efficient water-cooled circulation cooling of the radiofrequency ablation electrode needle system, improve the carbonization problem of ablation tumors and hypertrophic myocardial tissue; at the same time, the ultrasonic development ring structure or ultrasonic development coating material prepared at the tip of the radiofrequency ablation needle can improve the imaging at the tip of the ablation needle; further, the innovative design of the spiral nut double sealing ring buckle structure at the water circulation Luer joint of the radiofrequency ablation needle is designed to significantly improve the sealing of the water pipe joint connection; through the application of the above technology, a highly efficient, accurate, reliable and stable radiofrequency ablation electrode needle system suitable for clinical use is prepared. The novel radiofrequency ablation electrode needle of the present invention is suitable for surgical treatment of diseases such as hypertrophic cardiomyopathy / tumors, and the novel highly efficient water-cooled circulation radiofrequency ablation needle can solve the safety, effectiveness and stability during the ablation surgery of hypertrophic cardiomyopathy and tumors.

[0051] Furthermore, the present invention proposes a solution based on the difficulties faced by common radiofrequency ablation electrode needles in the clinical treatment of tumors and hypertrophic cardiomyopathy, and innovatively designs and prepares a high-stability radiofrequency ablation needle with efficient water-cooling circulation characteristics. Compared with conventional radiofrequency ablation needles on the market, this high-efficiency water-cooling circulation radiofrequency ablation needle has the following technical features: 1. The radiofrequency ablation needle adopts a high-efficiency convection water-cooling circulation structure design, which can achieve more efficient water-cooling circulation cooling of the tip of the radiofrequency needle. 2. The tip of the radiofrequency ablation electrode needle adopts a new development structure or ultrasonic development coating, which can significantly improve the development of the electrode needle tip under ultrasound guidance. 3. The innovative design of the spiral nut double sealing ring buckle structure in the Luer joint of the radiofrequency ablation needle water circulation system significantly improves the sealing and stability of the water pipe joint. Based on the above water-cooling circulation system structural innovation, development structure and coating material application, and structural innovation design of the water-cooling circulation joint, the radiofrequency ablation electrode needle has an efficient and stable water-cooling circulation system and development positioning. The RF needle water cooling circulation system adopts a convection water circulation structure design to achieve more complete water circulation cooling of the electrode needle; the RF needle tip adopts a development structure and ultrasound development coating design, which can better realize real-time development of the needle tip under ultrasound guidance; further, the spiral nut double sealing ring buckle structure design at the water circulation joint ensures the safety and stability of the water circulation, providing a more effective and stable ablation treatment solution during the treatment of tumors and hypertrophic cardiomyopathy.

[0052] like Figures 1 to 7 The high-efficiency water-cooled circulation radiofrequency ablation needle of the present invention comprises a radiofrequency ablation needle 1, an ablation needle handle 2, a Y-shaped water tank 3, an outflow tube 4, an external outflow tube 5, an inflow tube 6, an external inflow tube 7, an inner needle coolant inflow tube 8, a temperature measuring thermocouple 9, an inner needle thermocouple wire 10, a radiofrequency needle positive electrode connecting wire 11, and a negative electrode sticker 12.

[0053] The front end of the radiofrequency ablation needle 1 is a puncture tip 1-1, and the rear end is connected to and extends into the ablation needle handle 2. The interior is a central channel, and a capillary cooling water flow channel 1-2 connected front to back is arranged in the side wall.

[0054] The Y-shaped water tank 3 is arranged in the ablation needle handle 2, and the three ports of the Y-shaped water tank 3 are interconnected. The first port of the Y-shaped water tank 3 is connected to the rear end of the radiofrequency ablation needle 1, the second port is connected to the outflow tube 4, and the outflow tube 4 is connected to the external outflow tube 5, and one end of the inflow tube 6 is arranged at the third port and the other end of the inflow tube 6 is connected to the external inflow tube 7, and the external inflow tube 7 is connected to the cooling liquid.

[0055] The inner needle cooling liquid inlet tube 8 is arranged in the central channel of the radiofrequency ablation needle 1, with one end close to the puncture tip 1-1 and the front water inlet of the capillary cooling water flow channel 1-2, and the other end extending into the Y-shaped water tank 3 and connected to the inlet tube 6; the annular space between the inner needle cooling liquid inlet tube 8 and the inner wall of the radiofrequency ablation needle 1 is the convection channel 1-3; after the cooling liquid enters the inner needle cooling liquid inlet tube 8 through the inlet tube 6 and flows out from its front end, it returns through the capillary cooling water flow channel 1-2 and the convection channel 1-3 respectively and then flows out through the outflow tube 4.

[0056] The temperature measuring thermocouple 9 is arranged at the front end of the inner needle coolant inflow tube 8, and the inner needle thermocouple wire 10 is connected to the rear end of the inner needle coolant inflow tube 8.

[0057] One end of the radio frequency needle positive electrode connecting line 11 is connected to the electrode needle welding point 11 - 1 on the radio frequency ablation needle 1 , and the other end is connected to the host 13 through the electrode needle host connector 11 - 2 .

[0058] The negative electrode patch 12 can be attached to the human body and connected to the negative electrode interface of the host 13 via the negative electrode patch connecting connector 12 - 1 .

[0059] More specifically, a water flow direction mark of the inflow pipe 6 is provided on the external inflow pipe 7, and a water-cooled circulating peristaltic pump 14 is installed at the mark. The water-cooled circulating peristaltic pump 14 is provided with a peristaltic pump switch 14-1, a peristaltic pump water pipe installation direction mark 14-2 and a peristaltic pump speed adjustment knob 14-3.

[0060] The core part of this radiofrequency ablation needle is to design an efficient water-cooled circulating electrode needle system and prepare a Y-shaped efficient convection water-cooled circulating water tank. The water-cooled circulating peristaltic pump drives the peristaltic cold water to enter the inner needle cavity of the electrode needle along the tube cavity by rotating at the water inlet pipe. The water flows along the inner needle cavity to the thermocouple at the tip hole of the electrode needle and flows out to the outer cavity of the radiofrequency electrode needle. The water flows from the tip of the electrode needle along the outer cavity (outside the inner needle cavity) to the Y-shaped water tank, and then flows out from the outlet of the Y-shaped water tank into the ice-water mixture, bringing the heat from the electrode needle tip into the ice water in time. Driven by the peristaltic pump, the ice water flows into the inner needle cavity again. Repeated convection cycles can bring the heat at the tip of the radiofrequency electrode needle to the external ice water, thereby avoiding the problem of "tissue carbonization" caused by excessive temperature at the needle tip. The Y-type water tank capillary double-layer convection efficient water cooling circulation structure is designed. Driven by the peristaltic pump, the ice-water mixed coolant enters the inner needle coolant inlet tube and flows out along the inner needle coolant tube mouth. The coolant flows into the capillary cooling channel along the capillary cooling water inlet of the outer wall; the other part of the coolant is convectively cooled along the outer wall of the inner needle; the two parts of coolant overlap to achieve a cooling effect of "1+1>2", and the two parts of coolant are concentrated at the outlet of the Y-type water tank, and the heat is replaced by the ice-water mixture along the outflow tube. The reciprocating cycle realizes the efficient water cooling cycle of the radiofrequency ablation needle and avoids the problem of tissue "carbonization".

[0061] More specifically, an inverted pyramid enhanced development structure 1-4 is provided on the front outer wall of the radiofrequency ablation needle 1, and a size etching mark is provided on the outer wall of the radiofrequency ablation needle; a new development structure is prepared at the tip of the radiofrequency ablation needle, which can enhance the reflection effect of ultrasonic echo waves. This new structure prepares an "inverted pyramid" structure at the tip of the outer wall of the radiofrequency needle, which has the function of enhancing ultrasonic reflected echo waves, thereby improving the ultrasonic echo of the radiofrequency needle tip under real-time ultrasonic development during surgery, thereby enabling the operator to make real-time judgment on the position of the radiofrequency needle tip and improving the safety and accuracy of the surgical operation.

[0062] Alternatively, an ultrasound enhanced development coating may be prepared at the tip of the RF needle. The foaming structure in the coating structure may enhance the ultrasound echo, thereby enhancing the development of the needle tip. The coating material includes, but is not limited to, aluminum oxide, silicon oxide and other materials.

[0063] Specifically, the outflow tube 4 is connected to the spiral double-sealing ring snap-on Luer connector 16 of the external outflow tube 5 through the Luer connector 15, and the end of the external outflow tube 5 is the outflow port.

[0064] Specifically, the inflow tube 6 is connected to the Luer connector 15 of the external inflow tube 7 through a spiral double-seal ring snap-on Luer connector 16, and the end of the external inflow tube 7 is the inlet.

[0065] The outflow port and the inflow port are both arranged in the cooling liquid container 17 , and the cooling liquid container 17 contains a mixture of ice and water.

[0066] Specifically, the joint of the spiral double-sealing ring snap-on Luer connector 16 is provided with a double-layer sealing ring 16-1, a snap 16-2 and a connecting thread 16-3 in sequence. The connector is connected to its matching Luer connector 15 through threads and the snap 16-2, and is sealed at the connection by the double-layer sealing ring 16-1.

[0067] The above-mentioned water pipe Luer joint structure is innovatively designed. In order to ensure the reliability of the seal at the water pipe joint, a double-layer sealing ring joint is added at the joint. At the same time, a snap-on structure is designed. When the male and female Luer joints are rotated to seal, the snap-on structure is automatically triggered to lock the two joints, thereby avoiding loosening of the two joints under long-term water pressure shock and causing water leakage and other problems, thereby improving the reliability of the water pipe circulation system.

[0068] Specifically, the negative electrode patch 12 is connected to the negative electrode patch connection connector 12 - 1 via the negative electrode patch connection clamp 12 - 2 .

[0069] Specifically, a water tank fixing slot 2-1 is provided in the ablation needle handle 2 to fix the Y-shaped water tank 3. An electrode needle fixing slot 2-2 is also provided in the ablation needle handle 2 to fix the radiofrequency ablation needle 1.

[0070] In the present invention, the radiofrequency ablation needle and the inner needle cooling liquid inflow tube are made of alloy material, the Y-shaped water tank is made of plastic material, and the interconnected parts are connected by gluing.

[0071] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0072] Example:

[0073] like Figure 8 The high-efficiency water-cooled circulation radiofrequency ablation needle of the present invention can provide a more accurate and effective ablation treatment through the high-efficiency water-cooled circulation system during the operation. The ablation treatment of liver tissue is completed by using the new high-efficiency water-cooled circulation radiofrequency ablation system, requiring the ablation process power of 80W and the time of 8 minutes.

[0074] The working process of the new water-cooled circulation radiofrequency ablation system with high efficiency water-cooled circulation system is as follows:

[0075] (1) Complete the connection of the RF ablation electrode needle system and turn on the water-cooled circulation peristaltic pump. Immerse the water-cooled circulation water inlet and outlet pipes in the ice-water mixture, connect the electrode needle circuit, and connect the water-cooled circulation water inlet / outlet spiral nut double sealing ring buckle structure Luer connector. When connecting the Luer connector, rotate the male and female Luer connectors and hear a "click" sound to complete the sealing connection of the water circulation connector. Mark the water circulation direction of the water inlet pipe and install it in the same direction as the water circulation direction of the peristaltic pump. After the water circulation connection is completed, turn on the peristaltic pump switch. Driven by the peristaltic pump, the ice water flows from the water inlet to the inner core cavity of the electrode needle, and continues to flow to the temperature measuring thermocouple port of the electrode needle tip and flows out. At the needle tip, it convects along the inner cavity of the electrode needle (outer wall of the inner needle) and returns to the Y-shaped water tank, and then flows out from the Y-shaped water tank along the outlet pipe to the ice-water mixture, completing a water circulation process in the RF needle cavity.

[0076] (2) Puncture the tip of the RF needle to the area to be ablated, start the RF ablation device, and the heat at the tip of the RF ablation needle will be taken away by the cooling circulating water. Connect the RF ablation electrode needle, start the RF ablation device, gradually increase the power of the RF ablation device to 80W, and continue the ablation for 8 minutes. The peristaltic pump drives the cold water from the inner needle to the needle tip, and the excess heat at the needle tip is carried by convection from the outer wall of the RF needle (outside the inner needle) to the Y-shaped water tank, and then returned to the ice-water mixture through the outlet water pipe. The heat from the outflowing hot water melts the ice in the ice-water mixture, and the temperature of the returning hot water is also kept at a low value. Such continuous and repeated cycles ensure that the temperature of the RF needle tip is less than 10°C.

[0077] (3) High-efficiency water-cooled RF ablation needle system to avoid tissue carbonization. After the RF ablation system maintains a power of 80W for 8 minutes, turn off the RF ablation instrument, turn off the water-cooled RF ablation needle, remove the RF ablation needle, dissect the liver tissue after ablation, observe the tissue necrosis in the ablation area, and determine the tissue carbonization, necrosis and ablation range. Fig. 9 Comparison between the necrotic area tissue of the liver ablation by high-efficiency water-cooled circulation radiofrequency (left picture) and the carbonized tissue of the conventional radiofrequency ablation (right picture) shows that the radiofrequency ablation electrode needle has a good water-cooled circulation effect, clear boundaries, a short transition zone, and no problems such as tissue carbonization.

[0078] The high-efficiency water-cooled circulating radiofrequency ablation needle of the present invention can maintain a relatively low temperature at the needle tip through the innovative structural design of the Y-shaped water tank, thereby avoiding carbonization and absorption problems of tissues and achieving more accurate, safe, stable and reliable surgical ablation treatment.

[0079] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0080] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0081] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A highly efficient water-cooled circulating radiofrequency ablation needle, characterized in that: It comprises a radiofrequency ablation needle (1), an ablation needle handle (2), a Y-shaped water tank (3), an outflow tube (4), an external outflow tube (5), an inflow tube (6), an external inflow tube (7), an inner needle coolant inflow tube (8), a temperature measuring thermocouple (9), an inner needle thermocouple wire (10), a radiofrequency needle positive electrode connecting wire (11), and a negative electrode sticker (12); The front end of the radiofrequency ablation needle (1) is a puncture tip (1-1), the rear end is connected to and extends into the cavity of the ablation needle handle (2), the interior of the radiofrequency ablation needle (1) is a central channel, and a capillary cooling water flow channel (1-2) connected front and back is provided in the side wall; The Y-shaped water tank (3) is arranged in the cavity of the ablation needle handle (2), and the three ports of the Y-shaped water tank (3) are interconnected. The first port of the Y-shaped water tank (3) is connected to the rear end of the radiofrequency ablation needle (1), the second port is connected to the outflow tube (4), and the outflow tube (4) is connected to the external outflow tube (5), and one end of the inflow tube (6) is arranged at the third port, and the other end of the inflow tube (6) is connected to the external inflow tube (7), and the external inflow tube (7) is connected to the cooling liquid; The inner needle cooling liquid inflow tube (8) is arranged in the central channel of the radiofrequency ablation needle (1), one end of which is close to the puncture tip (1-1) and the front water inlet of the capillary cooling water flow channel (1-2), and the other end of which extends into the Y-shaped water tank (3) and is connected to the inflow tube (6); the annular space between the inner needle cooling liquid inflow tube (8) and the inner wall of the radiofrequency ablation needle (1) is the convection channel (1-3); the cooling liquid enters the inner needle cooling liquid inflow tube (8) through the inflow tube (6) and flows out from the front end thereof, and then returns through the capillary cooling water flow channel (1-2) and the convection channel (1-3) and then flows out through the outflow tube (4); The temperature measuring thermocouple (9) is arranged at the front end of the inner needle coolant inflow tube (8), and the inner needle thermocouple wire (10) is connected to the rear end of the inner needle coolant inflow tube (8); One end of the radio frequency needle positive electrode connection line (11) is connected to the electrode needle welding point (11-1) on the radio frequency ablation needle (1), and the other end is connected to the host (13) via the electrode needle host connector (11-2); The negative electrode patch (12) can be attached to a human body and connected to a negative electrode interface of a host (13) via a negative electrode patch connecting connector (12-1).

2. The high-efficiency water-cooled circulating radiofrequency ablation needle according to claim 1, characterized in that: The external inflow pipe (7) is provided with a water flow direction mark of the inflow pipe (6), and a water-cooled circulating peristaltic pump (14) is installed at the mark. The water-cooled circulating peristaltic pump (14) is provided with a peristaltic pump switch (14-1), a peristaltic pump water pipe installation direction mark (14-2) and a peristaltic pump speed adjustment knob (14-3).

3. The high-efficiency water-cooled circulating radiofrequency ablation needle according to claim 1, characterized in that: The front outer wall of the radiofrequency ablation needle (1) is provided with an inverted pyramid enhanced development structure (1-4), or the front outer wall of the radiofrequency ablation needle (1) is provided with an ultrasonic enhanced development coating.

4. The high-efficiency water-cooled circulating radiofrequency ablation needle according to claim 1, characterized in that: The outflow tube (4) is connected to the spiral double-seal-ring snap-on Luer connector (16) of the external outflow tube (5) via a Luer connector (15), and the end of the external outflow tube (5) is an outflow port.

5. The high-efficiency water-cooled circulating radiofrequency ablation needle according to claim 4, characterized in that: The inflow tube (6) is connected to the Luer connector (15) of the external inflow tube (7) via a spiral double-seal ring snap-on Luer connector (16), and the end of the external inflow tube (7) is an inflow port.

6. The high-efficiency water-cooled circulating radiofrequency ablation needle according to claim 5, characterized in that: The outflow port and the inflow port are both arranged in a cooling liquid container (17), and a mixture of ice and water is contained in the cooling liquid container (17).

7. The high-efficiency water-cooled circulating radiofrequency ablation needle according to claim 5, characterized in that: The spiral double-sealing ring snap-on Luer connector (16) is provided with a double-layer sealing ring (16-1), a snap (16-2) and a connecting thread (16-3) at the connector in sequence; the connector is connected to a matching Luer connector (15) via the thread and the snap (16-2), and is sealed at the connection point via the double-layer sealing ring (16-1).

8. The high-efficiency water-cooled circulating radiofrequency ablation needle according to claim 1, characterized in that: The negative electrode patch (12) is connected to the negative electrode patch connection connector (12-1) via a negative electrode patch connection clip (12-2).

9. The high-efficiency water-cooled circulating radiofrequency ablation needle according to claim 1, characterized in that: A water tank fixing slot (2-1) is provided in the ablation needle handle (2) for fixing the Y-shaped water tank (3).

10. The high-efficiency water-cooled circulating radiofrequency ablation needle according to claim 1, characterized in that: An electrode needle fixing slot (2-2) is also provided in the ablation needle handle (2) to fix the radiofrequency ablation needle (1).

Images