Microwave ablation needle easy to cool

Abstract

The utility model relates to the technical field of medical instruments, and discloses an easy-to-cool microwave ablation needle, which comprises a handle, an ablation needle main body is fixed in the handle, the ablation needle main body comprises a metal shell, a coaxial cable is inserted in the metal shell, the coaxial cable comprises an outer insulating sleeve on the outer layer and a conductor on the inner layer, and the outer insulating sleeve is sleeved on the outer insulating sleeve. A cooling assembly is arranged in the metal shell, the cooling assembly comprises two isolating bars fixed in the metal shell, the two isolating bars are spirally distributed on the inner wall in the metal shell at equal intervals, and one side of each isolating bar is fixed to the outer wall of the coaxial cable. According to the utility model, the two water channels are spirally distributed on the outer wall of the coaxial cable, so that the depth of the water inlet channel and the depth of the water outlet channel reach the maximum, the flow and the flow velocity of cooling water are ensured, the distribution of the water inlet channel and the water outlet channel on the outer wall of the coaxial cable is more uniform, the cooling of the coaxial cable is more uniform, and the service life of the coaxial cable is prolonged. And the cooling effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a microwave ablation needle which is easy to cool down. Background Art

[0002] Microwave ablation technology is widely used in the clinical treatment of soft tissue solid tumors. It has the advantages of simplicity, safety, and short operation time. It can reduce intraoperative risks and patient pain, and the size of the coagulation volume is controllable. Microwave tumor ablation uses microwave energy to act on tissues to produce thermal effects. In a short period of time, the center temperature of the thermal field can reach more than 100°C. The tumor tissue is coagulated and inactivated at an instantaneous high temperature, achieving the purpose of tumor ablation treatment. Microwave tumor ablation is to insert a microwave ablation needle into the lesion of human tissue, and continuously emit microwave energy from its front end to perform the operation.

[0003] An existing microwave ablation needle (announcement number: CN219700102U) has the following defects: the above-mentioned device sets inner and outer water channels between the outer shell and the cable, wherein the inner layer is the water inlet channel and the outer layer is the water outlet channel, so that the cooling water in the inner water channel exchanges heat with the cable. However, due to the limited space between the outer shell and the cable, if the water channels are divided into inner and outer water channels, the water channels will be too flat and shallow, just like a flattened water pipe, resulting in a smaller water flow rate, thereby affecting the cooling of the cable. Setting water channels directly on both sides of the cable will result in uneven cooling on the left and right sides of the cable. For this reason, the present utility model is proposed. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and provides a microwave ablation needle which is easy to cool down.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A microwave ablation needle that is easy to cool down, comprises a handle, an ablation needle body is fixed inside the handle, the ablation needle body comprises a metal shell, a coaxial cable is inserted into the inside of the metal shell, the coaxial cable comprises an outer insulating sleeve of an outer layer and an inner conductor, a cooling component is arranged inside the metal shell, the cooling component comprises two isolation strips fixed inside the metal shell, the two isolation strips are spirally and equidistantly distributed on the inner wall of the metal shell, one side of the isolation strip is fixed to the outer wall of the coaxial cable, the two isolation strips separate the inner cavity between the coaxial cable and the metal shell into a water inlet channel and a water outlet channel, the water inlet channel and the water outlet channel are connected to each other at the end of the metal shell.

[0007] Preferably, a sealing ring is provided in the internal fixed sleeve of the metal shell, the inner ring of the sealing ring is fixed to the outer wall of the coaxial cable, the sealing ring is located at the end of the water inlet channel and the water outlet channel, and two connecting water pipes are fixed inside the handle. The two connecting water pipes are fixed to one end of the metal shell and are respectively connected to the water inlet channel and the water outlet channel. One end of the coaxial cable away from the ablation needle body is fixed to the inside of the handle and extends from the bottom surface of the handle.

[0008] Preferably, the interval between the two isolation strips is 0.5 cm.

[0009] Preferably, an isolation sleeve is adhered to the inside of the metal shell, a microwave emitting needle is adhered to the inside of the isolation sleeve, the sealing ring is fixed to one end of the isolation sleeve away from the microwave emitting needle, and the conductor is inserted into one end of the microwave emitting needle.

[0010] Preferably, a micro temperature sensor is fixed to the outer circular wall of the metal shell, and the detection end of the micro temperature sensor passes through the outer circular wall of the metal shell and extends to the inside of the water outlet channel. The detection end of the micro temperature sensor is also in contact with the outer wall of the coaxial cable.

[0011] Preferably, a microcontroller is disposed inside the handle, a liquid crystal display screen is fixed to the top surface of the handle, and the micro temperature sensor and the liquid crystal display screen are both electrically connected to the microcontroller.

[0012] The beneficial effects of the utility model are:

[0013] By arranging a water inlet channel and a water outlet channel between the metal shell and the coaxial cable, and making the two water channels spirally distributed on the outer wall of the coaxial cable, when cooling water enters the water inlet channel, the cooling water will flow in a positive spiral along the water inlet channel on the outer wall of the coaxial cable until it flows to the end where the water inlet channel is connected to the water outlet channel. At this time, the cooling water enters the water outlet channel, and flows in a reverse spiral along the outer wall of the coaxial cable in the water outlet channel and is finally discharged from the equipment. This ensures the depth of the water inlet channel and the water outlet channel while also ensuring that the coaxial cable can obtain more uniform heat dissipation, thereby making it easier to cool the coaxial cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the three-dimensional split structure proposed by the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the water pipe connection proposed by the utility model;

[0017] Figure 4 for Figure 3A is an enlarged schematic diagram of the local structure.

[0018] In the figure: 1. handle; 2. ablation needle body; 201. metal shell; 202. isolation strip; 203. water inlet channel; 204. water outlet channel; 205. sealing ring; 206. isolation sleeve; 207. microwave emission needle; 208. connecting water pipe; 3. coaxial cable; 301. outer insulating sleeve; 302. conductor; 4. micro temperature sensor; 401. LCD display. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Please refer to the attached Figure 1 -Attached Figure 4 A microwave ablation needle that is easy to cool down includes a handle 1, an ablation needle body 2 is fixed inside the handle 1, the ablation needle body 2 includes a metal shell 201, a coaxial cable 3 is inserted inside the metal shell 201, the coaxial cable 3 includes an outer insulating sleeve 301 of an outer layer and a conductor 302 of an inner layer, a cooling component is arranged inside the metal shell 201, and the cooling component includes two isolation strips 202 fixed inside the metal shell 201, the two isolation strips 202 are spirally and equidistantly distributed on the inner wall of the metal shell 201, one side of the isolation strip 202 is fixed to the outer wall of the coaxial cable 3, the two isolation strips 202 separate the inner cavity between the coaxial cable 3 and the metal shell 201 into a water inlet channel 203 and a water outlet channel 204, and the water inlet channel 203 and the water outlet channel 204 are connected to each other at the end of the metal shell 201.

[0022] In the embodiment, a sealing ring 205 is provided inside the fixed sleeve of the metal shell 201, and the inner ring of the sealing ring 205 is fixed to the outer wall of the coaxial cable 3, and the sealing ring 205 is located at the end of the water inlet channel 203 and the water outlet channel 204. Two connecting water pipes 208 are fixed inside the handle 1, and the two connecting water pipes 208 are fixed to one end of the metal shell 201 and are respectively connected to the water inlet channel 203 and the water outlet channel 204. The end of the coaxial cable 3 away from the ablation needle body 2 is fixed to the inside of the handle 1 and extends from the bottom surface of the handle 1. By setting the water inlet channel 203 and the water outlet channel between the metal shell 201 and the coaxial cable 3, the water inlet channel 203 and the water outlet channel 204 are connected to the handle 1. Channel 204, and the two water channels are distributed in a spiral shape on the outer wall of the coaxial cable 3. When cooling water enters the water inlet channel 203, the cooling water will flow in a positive spiral along the water inlet channel 203 on the outer wall of the coaxial cable 3 until it flows to the end where the water inlet channel 203 is connected to the water outlet channel 204. At this time, the cooling water enters the water outlet channel 204, and flows in a reverse spiral along the outer wall of the coaxial cable 3 along the water outlet channel 204 and is finally discharged from the equipment. This ensures that the depth of the water inlet channel 203 and the water outlet channel 204 is ensured, while also ensuring that the coaxial cable 3 can obtain more uniform heat dissipation, thereby making it easier to cool the coaxial cable 3.

[0023] In the embodiment, the interval between the two isolation strips 202 is 0.5 cm. By setting the interval between the two isolation strips 202 to 0.5 cm, the width of the water inlet channel 203 and the water outlet channel 204 can be at least 0.5 cm, ensuring the flow rate of cooling water and ensuring the cooling effect on the coaxial cable 3.

[0024] In an embodiment, an isolation sleeve 206 is adhered to the inside of the metal shell 201, and the isolation sleeve 206 is made of plastic. A microwave emitting needle 207 is adhered to the inside of the isolation sleeve 206. The sealing ring 205 is fixed to one end of the isolation sleeve 206 away from the microwave emitting needle 207, and the conductor 302 is inserted into one end of the microwave emitting needle 207. Through the setting and use of the isolation sleeve 206, the isolation sleeve 206 made of plastic can prevent the metal shell 201 from shielding the coaxial cable 3 or causing interference to it.

[0025] In the embodiment, a micro temperature sensor 4 is fixed to the outer circular wall of the metal shell 201, and the detection end of the micro temperature sensor 4 penetrates the outer circular wall of the metal shell 201 and extends to the inside of the water outlet channel 204. The detection end of the micro temperature sensor 4 is also in contact with the outer wall of the coaxial cable 3. Through the setting and use of the micro temperature sensor 4, it is convenient to detect the temperature of the water outlet channel 204 and the coaxial cable 3.

[0026] In an embodiment, a microcontroller is disposed inside the handle 1, and a liquid crystal display screen 401 is fixed to the top surface of the handle 1. The micro temperature sensor 4 and the liquid crystal display screen 401 are electrically connected to the microcontroller. The temperature detected by the micro temperature sensor 4 can be displayed through the liquid crystal display screen 401, which is convenient for medical staff to observe and determine whether the current temperature of the coaxial cable 3 will cause burns to the patient's normal tissues.

[0027] Working principle: When in use, connect the connecting water pipe 208 to the external cooling system, then connect the coaxial cable 3 to the external microwave host, then insert the microwave emission needle 207 into the patient's diseased component and start the microwave host. At this time, the coaxial cable 3 begins to heat up, and the cooling system is started to inject cooling water into the water inlet channel 203 through the connecting water pipe 208. When the cooling water enters the water inlet channel 203, the cooling water will flow in a positive spiral along the water inlet channel 203 on the outer wall of the coaxial cable 3 until it flows to the end where the water inlet channel 203 is connected to the water outlet channel 204. At the same time, the cooling water enters the water outlet channel 204, flows in a reverse spiral along the outer wall of the coaxial cable 3 of the water outlet channel 204, and is finally discharged from the equipment and enters the external cooling system for cooling before being injected into the water inlet channel 203. During this process, the micro temperature sensor 4 detects the temperature of the water outlet channel 204 and the coaxial cable 3, and displays the temperature detected by the micro temperature sensor 4 through the LCD screen 401, which is convenient for medical staff to observe, thereby completing the cooling of the microwave ablation needle. The plastic isolation sleeve 206 can prevent the metal shell 201 from shielding the coaxial cable 3 or interfering with it.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A microwave ablation needle that is easy to cool down, comprising a handle (1), characterized in that: An ablation needle body (2) is fixed inside the handle (1), the ablation needle body (2) comprises a metal shell (201), a coaxial cable (3) is inserted inside the metal shell (201), the coaxial cable (3) comprises an outer insulating sleeve (301) of an outer layer and a conductor (302) of an inner layer, a cooling component is arranged inside the metal shell (201), the cooling component comprises two isolation strips (202) fixed inside the metal shell (201), the two isolation strips (202) are spirally distributed on the inner wall of the metal shell (201) at equal intervals, one side of the isolation strips (202) is fixed to the outer wall of the coaxial cable (3), the two isolation strips (202) separate the inner cavity between the coaxial cable (3) and the metal shell (201) into a water inlet channel (203) and a water outlet channel (204), and the water inlet channel (203) and the water outlet channel (204) are connected to each other at the end of the metal shell (201).

2. The microwave ablation needle that is easy to cool down according to claim 1, characterized in that: The internal fixed sleeve of the metal shell (201) is provided with a sealing ring (205), the inner ring of the sealing ring (205) is fixed to the outer wall of the coaxial cable (3), and the sealing ring (205) is located at the ends of the water inlet channel (203) and the water outlet channel (204). Two connecting water pipes (208) are fixed inside the handle (1), and the two connecting water pipes (208) are both fixed to one end of the metal shell (201) and are respectively connected to the water inlet channel (203) and the water outlet channel (204). One end of the coaxial cable (3) away from the ablation needle body (2) is fixed to the inside of the handle (1) and extends from the bottom surface of the handle (1).

3. The microwave ablation needle that is easy to cool down according to claim 2, characterized in that: The interval between the two isolation strips (202) is 0.5 cm.

4. The microwave ablation needle that is easy to cool down according to claim 3, characterized in that: An isolation sleeve (206) is adhered to the interior of the metal shell (201), a microwave emitting needle (207) is adhered to the interior of the isolation sleeve (206), the sealing ring (205) is fixed to one end of the isolation sleeve (206) away from the microwave emitting needle (207), and the conductor (302) is inserted into one end of the microwave emitting needle (207).

5. The microwave ablation needle that is easy to cool down according to claim 4, characterized in that: A micro temperature sensor (4) is fixed to the outer circular wall surface of the metal shell (201); a detection end of the micro temperature sensor (4) penetrates the outer circular wall surface of the metal shell (201) and extends to the inside of the water outlet channel (204); and the detection end of the micro temperature sensor (4) is also in contact with the outer wall of the coaxial cable (3).

6. The microwave ablation needle that is easy to cool down according to claim 5, characterized in that: A microcontroller is disposed inside the handle (1), a liquid crystal display screen (401) is fixed to the top surface of the handle (1), and both the micro temperature sensor (4) and the liquid crystal display screen (401) are electrically connected to the microcontroller.

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