A microwave ablation needle for an anti-adhesion procedure

Abstract

The utility model relates to the technical fields of microwave ablation needle, disclose a microwave ablation needle of anti -adhesion technology, including handle, the handle inside is provided with equipment cavity and liquid storage cavity, the handle top fixedly has the needle stem of sleeve joint, the needle stem bottom is connected with the needle head of interference, the needle head inside fixed mounting has radiator, the utility model discloses through the micro water pump and transports the coolant from liquid storage cavity to liquid inlet chamber, again to the heat absorption cavity in the needle head, finally through the circulation path design of liquid outlet chamber flow back to the circulating path design of liquid storage cavity, the connection between each cavity and pipeline is smooth, guarantees the coolant and absorbs heat constantly, reduces the temperature around needle head and needle stem, on one hand effectively prevented the adhesion of needle body and human tissue in the ablation process, convenient operation and reduce postoperative complications, on the other hand can effectively avoid the heat damage of overhigh temperature to the surrounding normal tissue, improved the security and accuracy of operation, help to protect the normal tissue and organ function of patient.

Description

Technical Field

[0001] This utility model relates to the technical field of microwave ablation needles, and in particular to a microwave ablation needle with an anti-adhesion process. Background Technology

[0002] The anti-adhesion microwave ablation needle is a medical device used in microwave ablation surgery. Its function is to deliver microwave energy to the diseased tissue during microwave ablation surgery, causing the diseased tissue to heat up, dehydrate, coagulate, and denature proteins, leading to irreversible necrosis, thereby achieving the therapeutic purpose, while preventing the ablation needle from adhering to the coagulated tissue.

[0003] Patent CN221357122U discloses a microwave ablation needle, relating to the field of microwave ablation needle technology. The device includes a fixed plate with a needle sleeve fixedly connected to its bottom. The needle sleeve is hollowed out, and a needle is slidably connected through the middle of its inner wall. During use, cooling water can be placed into the inner cylinder or introduced through the inlet. The motor is then turned on, causing the output rod to rotate, which in turn rotates the connected rotating disk. Simultaneously, the side column drives a bidirectional chain to rotate, with the first chain rotating downwards. A rotating rod is connected to one end of the first chain, which drives a push rod to move downwards. A pusher plate at one end of the rotating rod slides along the inner wall of the inner cylinder, continuously squeezing the cooling water inside and directing it through a cooling conduit into the needle sleeve, thus cooling the ablation needle and significantly extending its service life.

[0004] During use, the aforementioned patent lacks a circulating cooling mechanism and the cooling area is limited to the needle sleeve covering the needle shaft. The needle tip, which is the main source of heat, is not effectively cooled. There is a certain thermal resistance in the transfer of heat from the needle tip to the needle sleeve, resulting in low cooling efficiency and difficulty in quickly and effectively reducing the temperature of the needle tip. This makes it easy for tissue to adhere to the ablation needle due to high temperature, causing secondary damage to the tissue when the ablation needle is removed, increasing surgical risks and patient suffering. Utility Model Content

[0005] In view of the above-mentioned problems that existing methods lack a circulating cooling mechanism and the cooling part is limited to the needle sleeve fitted on the needle bar, while the main heat-generating needle tip is not effectively cooled, and tissue is prone to sticking to the ablation needle due to high temperature, this utility model is proposed.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a microwave ablation needle with anti-adhesion process, including a handle, the handle having an equipment cavity and a liquid storage cavity inside, a needle rod fixedly sleeved at the top of the handle, a needle tip interference-connected at the bottom of the needle rod, and a radiator fixedly installed inside the needle tip;

[0007] The needle bar has symmetrical outlet chambers on both sides inside, and an inlet chamber at the center inside the needle bar. A conductor is fixedly installed on the inner wall of the inlet chamber, and a connecting plate is fixedly connected to the bottom end of the conductor. The connecting plate is fixedly connected to the inner wall of the inlet chamber. An annular slot is opened at the bottom end of the needle bar, and the annular slot is connected to the outlet chamber. A through hole is opened between the annular slot and the inlet chamber.

[0008] As a preferred embodiment, the annular slot has an annular block inserted into its inner wall via an interference fit. The annular block has an inlet groove inside its side wall, which is connected to a through hole. A needle is fixedly connected to the bottom of the annular block. The needle has a heat absorption chamber inside, which is connected to the inlet groove. The heat absorption chamber has symmetrical outlet grooves on its inner wall, and the outlet at the top of the outlet groove is connected to the inlet at the bottom of the outlet chamber.

[0009] As a preferred embodiment, a liquid outlet pipe is fixedly sleeved at the top of the liquid outlet chamber, and the top of the liquid outlet pipe extends into the liquid storage chamber.

[0010] As a preferred embodiment, a miniature water pump is fixedly installed inside the equipment cavity, and a liquid extraction tube is fixedly connected to the input end of the miniature water pump. One end of the liquid extraction tube passes through the bottom wall of the equipment cavity and extends into the liquid storage cavity.

[0011] As a preferred embodiment, the output end of the micro water pump is fixedly connected to a three-way pipe, the bottom end of which penetrates the bottom wall of the equipment cavity and extends into the liquid inlet cavity.

[0012] As a preferred embodiment, the outer diameter of the annular block is larger than the outer diameter of the inner wall of the annular slot, and the inner diameter of the annular block is larger than the inner diameter of the inner wall of the annular slot.

[0013] As a preferred embodiment, the annular block is symmetrically provided with semi-circular limiting rods on its outer surface, the annular slot has a limiting groove on its side wall, and the semi-circular limiting rods are slidably connected to the inner wall of the limiting groove.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] 1. This invention utilizes a micro-pump to transport coolant from the storage chamber to the inlet chamber, then to the heat absorption chamber inside the needle, and finally back to the storage chamber through the outlet chamber. The smooth connection between the various chambers and pipes ensures that the coolant continuously absorbs heat, reducing the temperature around the needle and needle shaft. On the one hand, this effectively prevents the needle from adhering to human tissue during the ablation process, facilitating operation and reducing postoperative complications. On the other hand, it effectively avoids thermal damage to surrounding normal tissues caused by excessively high temperatures, improving the safety and precision of the surgery and helping to protect the normal tissues and organ functions of the patient.

[0016] 2. This utility model is easy to disassemble and replace. Simply cool the annular block at a low temperature and then insert it into the annular slot at room temperature. No complicated tools or processes are required. When the needle needs to be replaced, the annular slot can be expanded by heating the needle rod, or the damaged needle can be contracted by low temperature treatment. This easily separates the annular block from the annular slot, making it easy to disassemble and replace parts, reducing maintenance costs and difficulty. Moreover, the interference fit connection can effectively resist axial and radial external forces, ensuring that the connection between the needle and the needle tube will not easily loosen during the use of the microwave ablation needle, thus ensuring the stability and safety of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the bottom cross-sectional structure of the needle rod in this utility model;

[0020] Figure 4 This is an enlarged structural diagram of the needle in this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of the needle in this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Handle; 11. Equipment cavity; 12. Liquid storage cavity; 2. Needle bar; 21. Liquid inlet cavity; 22. Conductor; 23. Connecting plate; 24. Through hole; 25. Annular slot; 26. Liquid outlet cavity; 27. Liquid outlet tube; 28. Limiting groove; 3. Needle; 31. Radiator; 32. Annular block; 33. Liquid inlet groove; 34. Heat absorption cavity; 35. Liquid outlet groove; 36. Semi-circular limiting rod; 4. Liquid extraction tube; 5. T-connector; 6. Miniature water pump. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1-5 This is the first embodiment of the present invention, which provides a microwave ablation needle with anti-adhesion technology, including a handle 1, an equipment cavity 11 and a liquid storage cavity 12 inside the handle 1, a needle rod 2 fixedly sleeved at the top of the handle 1, a needle tip 3 interference-connected at the bottom of the needle rod 2, and a radiator 31 fixedly installed inside the needle tip 3.

[0026] The needle bar 2 has symmetrical outlet chambers 26 on both sides inside, and an inlet chamber 21 at the center inside the needle bar 2. A conductor 22 is fixedly installed on the inner wall of the inlet chamber 21. A connecting plate 23 is fixedly connected to the bottom end of the conductor 22. The connecting plate 23 is fixedly connected to the inner wall of the inlet chamber 21. An annular slot 25 is opened at the bottom end of the needle bar 2. The annular slot 25 is connected to the outlet chamber 26. A through hole 24 is opened between the annular slot 25 and the inlet chamber 21.

[0027] An annular block 32 is interference-fitted to the inner wall of the annular slot 25. An inlet groove 33 is opened inside the side wall of the annular block 32. The inlet groove 33 is connected to the through hole 24. A needle 3 is fixedly connected to the bottom end of the annular block 32. A heat absorption chamber 34 is opened inside the needle 3. The heat absorption chamber 34 is connected to the inlet groove 33. A liquid outlet groove 35 is symmetrically opened on the inner wall of the heat absorption chamber 34. The top outlet of the liquid outlet groove 35 is connected to the bottom inlet of the liquid outlet chamber 26.

[0028] A liquid outlet pipe 27 is fixedly sleeved at the top of the liquid outlet chamber 26, and the top of the liquid outlet pipe 27 extends into the liquid storage chamber 12.

[0029] A miniature water pump 6 is fixedly installed inside the equipment cavity 11. A liquid extraction tube 4 is fixedly connected to the input end of the miniature water pump 6. One end of the liquid extraction tube 4 passes through the bottom wall of the equipment cavity 11 and extends into the liquid storage cavity 12.

[0030] The output end of the micro water pump 6 is fixedly connected to a three-way pipe 5. The bottom end of the three-way pipe 5 passes through the bottom wall of the equipment cavity 11 and extends into the liquid inlet cavity 21.

[0031] Specifically, when the radiator 31 is working, it generates heat. At this time, the micro water pump 6 is started. The micro water pump 6 draws coolant from the storage chamber 12 through the liquid extraction pipe 4. After pressurizing the coolant, it is injected into the liquid inlet chamber 21 through the three-way pipe 5. The coolant flows to the bottom of the liquid inlet chamber 21 and flows into the liquid inlet groove 33 inside the side wall of the annular block 32 through the through hole 24. The coolant enters the heat absorption chamber 34 inside the needle 3 from the liquid inlet groove 33 and absorbs heat in the heat absorption chamber 34. As the micro water pump 6 continues to inject coolant into the liquid inlet chamber 21, under the action of pressure, the coolant that has absorbed heat enters the liquid outlet chamber 26 through the liquid outlet groove 35 and finally flows back to the storage chamber 12 through the liquid outlet pipe 27, completing one cycle.

[0032] During microwave ablation, a micro water pump 6 delivers coolant from the reservoir 12 to the inlet chamber 21, then to the heat absorption chamber 34 inside the needle 3, and finally back to the reservoir 12 through the outlet chamber 26. This circular path design ensures smooth connections between the various chambers and pipes, guaranteeing that the coolant continuously absorbs heat and reduces the temperature around the needle 3 and needle shaft 2. On the one hand, this effectively prevents the needle from adhering to human tissue during ablation, facilitating operation and reducing postoperative complications. On the other hand, it effectively avoids thermal damage to surrounding normal tissues caused by excessively high temperatures, improving the safety and precision of the surgery and helping to protect the normal tissues and organ functions of the patient.

[0033] Reference Figures 1-5 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the outer diameter of the annular block 32 is larger than the outer diameter of the inner wall of the annular slot 25, and the inner diameter of the annular block 32 is larger than the inner diameter of the inner wall of the annular slot 25.

[0034] A semi-circular limiting rod 36 is symmetrically arranged on the outer surface of the annular block 32, and a limiting groove 28 is opened on the side wall of the annular slot 25. The semi-circular limiting rod 36 is slidably connected to the inner wall of the limiting groove 28.

[0035] Specifically, when it is necessary to connect the needle 3 and the needle bar 2, the annular block 32 is first cooled and shrunken. When the annular block 32 is cooled to the set temperature, due to the low temperature, the outer diameter of the annular block 32 is smaller than the outer diameter of the inner wall of the annular slot 25, so that the annular block 32, which was originally unable to be inserted, has the conditions for insertion.

[0036] Align the annular block 32 with the annular slot 25 and insert it along the axial direction. During the insertion process, the semi-circular limiting rods 36 symmetrically arranged on the outer surface of the annular block 32 will slide along the inner wall of the limiting groove 28 to ensure that the annular block 32 is accurately inserted into the annular slot 25.

[0037] After insertion, allow the annular block 32 to naturally return to room temperature within the annular slot 25. As the temperature gradually rises, the size of the annular block 32 begins to recover. At this time, the interference between the outer ring of the annular block 32 and the inner wall of the annular slot 25, and the same interference between the inner ring and the outer ring, form an interference fit connection. After returning to room temperature, the semi-circular limiting rod 36 and the limiting groove 28 fit tightly together. The tight fit between the two further enhances the stability of the connection, prevents the annular block 32 from moving axially and radially during the operation of the microwave ablation needle, ensures the reliability and sealing of the connection, and meets the working requirements of the microwave ablation needle.

[0038] This design allows for easy disassembly and replacement. Simply cool the annular block 32 at a low temperature and then insert it into the annular slot 25 at room temperature. No complicated tools or processes are required. When the needle 3 needs to be replaced, the annular slot 25 can be expanded by heating the needle bar 2, or the damaged needle 3 can be contracted by low-temperature treatment. This easily separates the annular block 32 from the annular slot 25, facilitating disassembly and replacement of parts and reducing maintenance costs and difficulty. Furthermore, the interference fit connection effectively resists axial and radial external forces, ensuring that the connection between the needle 3 and the needle bar 2 will not easily loosen during the use of the microwave ablation needle, thus guaranteeing the stability and safety of the equipment.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A microwave ablation needle with an anti-adhesion process, comprising a handle (1), characterized in that: The handle (1) has an equipment cavity (11) and a liquid storage cavity (12) inside. A needle rod (2) is fixedly sleeved on the top of the handle (1). A needle tip (3) is interference-connected to the bottom of the needle rod (2). A radiator (31) is fixedly installed inside the needle tip (3). The needle rod (2) has symmetrically arranged outlet chambers (26) on both sides inside. The needle rod (2) has an inlet chamber (21) at the center inside. A conductor (22) is fixedly installed on the inner wall of the inlet chamber (21). A connecting plate (23) is fixedly connected to the bottom end of the conductor (22). The connecting plate (23) is fixedly connected to the inner wall of the inlet chamber (21). An annular slot (25) is opened at the bottom end of the needle rod (2). The annular slot (25) is connected to the outlet chamber (26). A through hole (24) is opened between the annular slot (25) and the inlet chamber (21).

2. The microwave ablation needle with an anti-adhesion process according to claim 1, characterized in that: An annular block (32) is interference-fitted to the inner wall of the annular slot (25). An inlet groove (33) is provided inside the side wall of the annular block (32). The inlet groove (33) is connected to the through hole (24). A needle (3) is fixedly connected to the bottom end of the annular block (32). A heat absorption chamber (34) is provided inside the needle (3). The heat absorption chamber (34) is connected to the inlet groove (33). An outlet groove (35) is symmetrically provided on the inner wall of the heat absorption chamber (34). The top outlet of the outlet groove (35) is connected to the bottom inlet of the outlet chamber (26).

3. The microwave ablation needle with an anti-adhesion process according to claim 2, characterized in that: The top of the liquid outlet chamber (26) is fixedly sleeved with a liquid outlet pipe (27), and the top of the liquid outlet pipe (27) extends into the liquid storage chamber (12).

4. The microwave ablation needle with an anti-adhesion process according to claim 1, characterized in that: A micro water pump (6) is fixedly installed inside the equipment cavity (11). A liquid extraction tube (4) is fixedly connected to the input end of the micro water pump (6). One end of the liquid extraction tube (4) passes through the bottom wall of the equipment cavity (11) and extends into the liquid storage cavity (12).

5. The microwave ablation needle with an anti-adhesion process according to claim 4, characterized in that: The output end of the micro water pump (6) is fixedly connected to a three-way pipe (5), the bottom end of which penetrates the bottom wall of the equipment cavity (11) and extends into the liquid inlet cavity (21).

6. The microwave ablation needle with an anti-adhesion process according to claim 2, characterized in that: The outer diameter of the annular block (32) is greater than the outer diameter of the inner wall of the annular slot (25), and the inner diameter of the annular block (32) is greater than the inner diameter of the inner wall of the annular slot (25).

7. The microwave ablation needle with an anti-adhesion process according to claim 6, characterized in that: The outer surface of the annular block (32) is symmetrically provided with semi-circular limiting rods (36), and the side wall of the annular slot (25) is provided with a limiting groove (28). The semi-circular limiting rods (36) are slidably connected to the inner wall of the limiting groove (28).

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