Microwave ablation needle for treating hemangioma and vessel malformation

Abstract

The utility model discloses a microwave ablation needle for hemangioma and vessel malformation treatment, and belongs to the technical field of medical instruments. The microwave ablation needle comprises an ablation needle body and an ablation needle tube, a catheter is arranged at the front end of the ablation needle tube, the ablation needle body is coaxially and slidably sleeved with the catheter, and cooling assemblies used for cooling the ablation needle body are arranged in the ablation needle tube and the catheter. A first mounting groove is formed in the rear end of the ablation needle tube, and a limiting assembly used for limiting the ablation needle body is arranged in the first mounting groove. According to the microwave ablation needle, through the arrangement of the catheter, the cooling efficiency of the ablation needle body can be improved under the condition that the microwave ablation effect is not affected, and the tip end of the ablation needle body can be collected into the catheter after microwave ablation heating is finished; the high-temperature tip of the ablation needle body can be prevented from hurting normal tissues of the human body, the limiting assembly can prevent the ablation needle body from moving front and back in the using process, and safety is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a microwave ablation needle for treating hemangiomas and vascular malformations. Background Art

[0002] In recent years, image-guided minimally invasive interventional microwave ablation for tumor treatment has been widely used in clinical practice. Microwave ablation needles are inserted percutaneously into the central area of ​​human tissue lesions under the guidance of CT or ultrasound. The microwaves continuously released from the front end cause the surrounding molecules to rotate at high speed to produce friction and heat, thereby causing tissue coagulation, dehydration and necrosis; microwave ablation of tumors is highly efficient, safe, less traumatic and with fewer complications. Microwave ablation therapy means that medical staff use microwave ablation needles to puncture and contact the patient's lesion site, and use a therapeutic device to transfer microwave energy to the microwave ablation needle, thereby causing irreversible necrosis of the tumor, thereby achieving the treatment effect. Microwave ablation therapy is widely used in the treatment of hemangiomas and vascular malformations. Existing microwave ablation needles cannot be cooled quickly, which can cause harm when removed from the patient's body, and are prone to medical accidents, which is not conducive to use.

[0003] The utility model patent with publication number CN219306917U discloses a rotatably connected microwave ablation needle, which cools the ablation needle by setting a circulating cold water pipe on the outside of the rear end of the ablation needle. However, the microwave ablation needle can only cool the ablation needle portion located in the ablation needle tube, and cannot cool the ablation needle portion located in the front tube head and the catheter and outside the entire connecting assembly, so that the cooling efficiency of the entire ablation needle is low, and the ablation needle cannot be cooled quickly when the cooling time is insufficient; moreover, since the ablation needle punctures the patient's skin and tissue, during the microwave heating of the ablation needle, the part in contact with the patient's skin and tissue will also be affected by microwave ablation, thereby causing certain damage to normal human tissue. Summary of the invention

[0004] In view of the above-mentioned problems, the utility model aims to provide a microwave ablation needle for the treatment of hemangiomas and vascular malformations. A catheter is sheathed on the outside of the ablation needle body so that only the tip of the ablation needle body is exposed outside the catheter. At the same time, circulating water cooling is carried out through a circulating water channel in the catheter, which neither affects the microwave ablation effect nor improves the cooling efficiency of the ablation needle body. After the microwave ablation heating is completed, the tip of the ablation needle body is retracted into the catheter to avoid damage to normal human tissues caused by the high temperature of the tip of the ablation needle body.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A microwave ablation needle for treating hemangiomas and vascular malformations comprises an ablation needle body and an ablation needle tube. A catheter is provided at the front end of the ablation needle tube. The ablation needle body is coaxially and slidably sleeved in the catheter. A cooling component for cooling the ablation needle body is provided in the ablation needle tube and the catheter.

[0007] Furthermore, the cooling component includes a circulating water channel opened in the catheter, a cooling water tank is provided in the ablation needle tube, and the cooling water tank is connected to both ends of the circulating water channel through a cooling water inlet pipe and a cooling water outlet pipe respectively.

[0008] Furthermore, a micro pump is installed on the cooling water inlet pipe.

[0009] Furthermore, the cooling water tank is also connected to a water inlet pipe and a water outlet pipe, and sealing plugs are provided at the pipe openings of the water inlet pipe and the water outlet pipe.

[0010] Furthermore, a first mounting groove is provided at the rear end of the ablation needle tube, and a limiting component for limiting the position of the ablation needle body is provided in the first mounting groove.

[0011] Furthermore, the limiting assembly includes a limiting clamping plate rotatably mounted on the side wall of the first mounting groove, the limiting clamping plate is provided with two clearance grooves, and the ablation needle body is provided with two positioning plates matching the clearance grooves.

[0012] Furthermore, an operating handle is provided on the top of the position-limiting clamping plate, and the operating handle passes through the top of the ablation needle tube. A sliding groove communicating with the first mounting groove is provided on the ablation needle tube.

[0013] Furthermore, a torsion spring is installed on one side of the sliding slot, and the torsion spring is connected to the limiting clamping plate.

[0014] Furthermore, a circle of rear limiting ring plate is also provided in the first installation groove.

[0015] Furthermore, a square rod is connected to the rear end of the ablation needle body, and a square hole corresponding to the square rod is opened on the rear side surface of the ablation needle tube.

[0016] The beneficial effect of the utility model is that compared with the prior art, the improvement of the utility model is that:

[0017] 1. The microwave ablation needle of the utility model is provided with a catheter on the outside of the ablation needle body, so that only the tip of the ablation needle body is exposed outside the catheter during microwave ablation. The circulating water channel in the catheter can be used to cool most of the ablation needle body, which does not affect the microwave ablation effect and can improve the cooling efficiency of the ablation needle body. After the microwave ablation heating is completed, the tip of the ablation needle body can be retracted into the catheter to avoid the high temperature of the tip of the ablation needle body from damaging normal human tissues.

[0018] 2. The microwave ablation needle of the utility model is provided with a limit assembly for limiting the position of the ablation needle body at the rear end of the ablation needle tube. The ablation needle body can be limited by the limit card plate and the positioning plate on the ablation needle body to prevent the ablation needle body from moving forward and backward during use. At the same time, the square rod at the rear end of the ablation needle body cooperates with the square hole on the ablation needle tube to prevent the ablation needle body from rotating during use, thereby improving the safety performance of the ablation needle body. In addition, when the ablation needle body needs to be moved backward, it is only necessary to rotate the operating handle to make the positioning plate and the clearance groove on the limit card plate correspond to each other, so as to realize the backward movement of the ablation needle body. The operation is convenient and can be operated with one hand, which is suitable for clinical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the external structure of the microwave ablation needle of the utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of the microwave ablation needle when the front end of the ablation needle body of the utility model is located outside the catheter.

[0021] Figure 3 This is a schematic diagram of the internal structure of the microwave ablation needle when the front end of the ablation needle body of the utility model is located in the catheter.

[0022] Figure 4 This is a side view of the internal structure of the ablation needle body of the utility model in the first installation groove.

[0023] Figure 5 This is a structural side view of the utility model when the positioning plate and the positioning grooves on the limiting clamping plate are staggered.

[0024] Figure 6 This is a structural side view of the utility model when the positions of the positioning plate and the giving groove on the limiting clamping plate correspond to each other.

[0025] Figure 7 It is a side view of the rear limiting ring plate structure of the utility model.

[0026] Among them: 1-ablation needle body, 101-push-pull plate, 2-ablation needle tube, 201-first mounting groove, 202-square hole, 3-catheter, 4-circulating water channel, 5-cooling water tank, 6-cooling water inlet pipe, 7-cooling water outlet pipe, 8-micro pump, 9-water inlet pipe, 10-water outlet pipe, 11-sealing plug, 12-limiting card plate, 13-allowing groove, 14-positioning plate, 15-operating handle, 16-sliding groove, 17-second mounting groove, 18-torsion spring, 19-rear limiting ring plate, 20-square rod. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments. Embodiment 1:

[0028] See attached Figure 1-7 A microwave ablation needle for treating hemangioma and vascular malformation is shown, comprising an ablation needle body 1 and an ablation needle tube 2, wherein a handle is integrally provided at the bottom of the ablation needle tube 2, and an anti-slip groove is provided on the handle. The rear end of the ablation needle body 1 passes through the ablation needle tube 2, and a catheter 3 is provided at the front end of the ablation needle tube 2, wherein the catheter 3 is coaxially sleeved outside the ablation needle body 1, and the ablation needle body 1 is connected to the catheter 3 by sliding along the axial direction of the catheter 3, and the catheter 3 guides the movement of the ablation needle body 1 and can also accommodate the ablation needle body 1, and a cooling component for cooling the ablation needle body 1 is provided in the ablation needle tube 2 and the catheter 3, and the catheter 3 is made of heat-insulating material.

[0029] The front end of the ablation needle body 1 slides through the catheter 3, the rear end of the ablation needle body 1 slides through the ablation needle tube 2, and the rear end of the ablation needle body 1 is connected to an external microwave ablation device through a coaxial cable. When performing microwave ablation treatment, the front end of the ablation needle body 1 is moved outside the catheter 3, and the ablation needle body 1 and the catheter 3 are punctured together to the diseased tissue inside the human body, and then the microwave ablation device is turned on. The microwave ablation device, as a microwave generator, transmits microwaves to the ablation needle body 1 through the coaxial cable, and the heat at the front end of the ablation needle body 1 burns the diseased tissue. The part of the catheter 3 that is sleeved outside the ablation needle body 1 can avoid causing damage to normal tissues of the human body. After the microwave ablation is completed, a cooling component is used to cool the catheter 3 body and the internal ablation needle body 1, and at the same time, the ablation needle body 1 is moved backward until the front end is located in the catheter 3, and the ablation needle body 1 is taken out together with the catheter 3, which can avoid the tip of the ablation needle body 1 located outside the catheter 3 from causing damage to normal tissues of the human body without cooling.

[0030] The cooling component includes a circulating water channel 4 opened in the catheter 3, and a cooling water tank 5 is provided in the ablation needle tube 2. The cooling water tank 5 is connected to the two ends of the circulating water channel 4 through a cooling water inlet pipe 6 and a cooling water outlet pipe 7 respectively. A micro pump 8 is installed on the cooling water inlet pipe 6. Under the action of the micro pump 8, the cooling water in the cooling water tank 5 enters the circulating water channel 4 through the cooling water inlet pipe 6, and then circulates to the cooling water tank 5 through the cooling water outlet pipe 7. A refrigerant is provided in the cooling water tank 5 to ensure the temperature of the water in the cooling water tank 5. The cooling water tank 5 uses existing technology to cool the internal circulating water, which will not be elaborated in the application.

[0031] The cooling water tank 5 is also connected to a water inlet pipe 9 and a water outlet pipe 10, which both pass through the ablation needle tube 2, and sealing plugs 11 are provided at the pipe openings of the water inlet pipe 9 and the water outlet pipe 10. Water can be added to the cooling water tank 5 through the water inlet pipe 9, and the water in the cooling water tank 5 can be discharged through the water outlet pipe 10. When there is no need to add water or drain water, the sealing plug 11 is used to seal the water inlet pipe 9 and the water outlet pipe 10.

[0032] When the microwave ablation needle in this embodiment is in use, the front end of the ablation needle body 1 is moved to the outside of the catheter 3, and the ablation needle body 1 and the catheter 3 are punctured into the diseased tissue inside the human body together, and then the microwave ablation instrument is turned on. The microwave ablation instrument, as a microwave generator, transmits microwaves to the ablation needle body 1 through a coaxial cable. The heat at the front end of the ablation needle body 1 burns the diseased tissue, and the part of the catheter 3 that is arranged outside the ablation needle body 1 can avoid damage to normal human tissue.

[0033] After microwave ablation is completed, the ablation needle body 1 is moved backward to the front end located in the catheter 3. At the same time, the micro pump 8 is started, and the cooling water in the cooling water tank 5 enters the circulating water channel 4 through the cooling water inlet pipe 6, and then circulates to the cooling water tank 5 through the cooling water outlet pipe 7. The circulating cooling water in the circulating water channel 4 can cool the catheter 3 itself and the ablation needle body 1 in the catheter 3, which can improve the cooling effect of the ablation needle body 1. Since the catheter 3 body is made of heat-insulating material, the temperature will not be too high. The ablation needle body 1 is taken out together with the catheter 3, which can prevent the tip of the ablation needle body 1 located outside the catheter 3 from causing damage to normal human tissue without cooling. Embodiment 2:

[0034] On the basis of the first embodiment, in order to ensure the stability of the ablation needle body 1 during forward and backward movement, a first mounting groove 201 is opened at the rear end of the ablation needle tube 2, and a limiting component for limiting the ablation needle body 1 is provided in the first mounting groove 201.

[0035] Specifically, the limiting assembly includes a limiting card plate 12 rotatably mounted on the side wall of the first mounting groove 201, the limiting card plate 12 is provided with two clearance grooves 13, the ablation needle body 1 is symmetrically provided with two positioning plates 14 matching the clearance grooves 13, the top of the limiting card plate 12 is provided with an operating handle 15, the operating handle 15 passes through the top of the ablation needle tube 2, and the ablation needle tube 2 is provided with a sliding groove 16 connected to the first mounting groove 201, the sliding groove 16 serves as the moving space of the operating handle 15, and the thickness of the positioning plate 14 corresponds to the distance between the limiting card plate 12 and the front side wall of the first mounting groove 201. When the operating handle 15 is located at one end of the sliding groove 16, the clearance groove 13 and the positioning plate 14 are interlaced with each other. At this time, when the positioning plate 14 is located at the front end of the limiting card plate 12, the positioning plate 14 is clamped and fixed between the limiting card plate 12 and the first mounting groove 201. Rotate the operating handle 15 to drive the limit clamping plate 12 to rotate. When the operating handle 15 is located at the other end of the sliding groove 16, the position of the clearance groove 13 corresponds to the position of the positioning plate 14. Pull the ablation needle body 1 backward, and the positioning plate 14 can pass through the clearance groove 13, so that the ablation needle body 1 can move backward.

[0036] In order to facilitate the fixing of the limiting clamping plate 12, a second mounting groove 17 is further provided on one side of the sliding groove 16, and a torsion spring 18 is installed in the second mounting groove 17, and the torsion spring 18 is connected to the limiting clamping plate 12. When there is no need to move the ablation needle body 1, the torsion spring 18 is in a balanced state, driving the operating handle 15 to be located at one end close to the second mounting groove 17, so that the positioning groove 13 and the clamping plate 12 are interlaced with each other, and the ablation needle body 1 can be limited.

[0037] In order to facilitate the forward and backward movement of the ablation needle body 1 , a push-pull plate 101 is provided at the rear end of the ablation needle body 1 .

[0038] In order to limit the distance that the ablation needle body 1 moves backward, a circle of rear limiting ring plate 19 is further provided in the first installation groove 201 .

[0039] In order to prevent the ablation needle body 1 from rotating during the forward and backward movement, a square rod 20 is provided on the front side of the push-pull plate 101 , and a square hole 202 corresponding to the square rod 20 is opened on the rear side of the ablation needle tube 2 .

[0040] When the microwave ablation needle in this embodiment is in use, the front end of the ablation needle body 1 is moved outside the catheter 3. At this time, the two positioning plates 14 on the ablation needle body 1 are located between the limiting clamping plate 12 and the first mounting groove 201. At the same time, the square rod 20 is inserted into the square hole 202, which can limit the position of the ablation needle body 1, and the ablation needle body 1 will not rotate.

[0041] The ablation needle body 1 and the catheter 3 are inserted together into the diseased tissue inside the human body, and then connected to the microwave ablation device. The microwave ablation device acts as a microwave generator and transmits microwaves to the ablation needle body 1 through a coaxial cable. The heat at the front end of the ablation needle body 1 burns the diseased tissue, and the part of the catheter 3 that is arranged outside the ablation needle body 1 can avoid damage to normal human tissue.

[0042] After the microwave ablation is finished, the operating handle 15 is rotated to drive the limit clamping plate 12 to rotate. The operating handle 15 is located at the end of the sliding groove 16 away from the second mounting groove 17. The position of the clearance groove 13 corresponds to the position of the positioning plate 14. The ablation needle body 1 is pulled backward, and the positioning plate 14 can pass through the clearance groove 13, so that the ablation needle body 1 can move backward. Move the ablation needle body 1 backward until the front end is located in the catheter 3, release the operating handle 15, and the positioning plate 14 is stuck between the limit clamping plate 12 and the rear limit ring plate 19. At the same time, start the micro pump 8, the cooling water in the cooling water tank 5 enters the circulating water channel 4 through the cooling water inlet pipe 6, and then circulates to the cooling water tank 5 through the cooling water outlet pipe 7. The circulating cooling water in the circulating water channel 4 can cool the catheter 3 itself and the ablation needle body 1 in the catheter 3, which can improve the cooling effect of the ablation needle body 1. Since the catheter 3 body is made of heat-insulating material, the temperature will not be too high. Taking out the ablation needle body 1 together with the catheter 3 can prevent the tip of the ablation needle body 1 located outside the catheter 3 from causing damage to normal human tissue without cooling.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A microwave ablation needle for treating hemangiomas and vascular malformations, comprising an ablation needle body (1) and an ablation needle tube (2), characterized in that: A catheter (3) is provided at the front end of the ablation needle tube (2); the ablation needle body (1) is coaxially and slidably sleeved in the catheter (3); and a cooling component for cooling the ablation needle body (1) is provided in the ablation needle tube (2) and the catheter (3); The cooling component comprises a circulating water channel (4) opened in the catheter (3); a cooling water tank (5) is provided in the ablation needle tube (2); the cooling water tank (5) is connected to both ends of the circulating water channel (4) via a cooling water inlet pipe (6) and a cooling water outlet pipe (7) respectively; A micro pump (8) is installed on the cooling water inlet pipe (6); The cooling water tank (5) is also connected to a water inlet pipe (9) and a water outlet pipe (10), and sealing plugs (11) are provided at the pipe openings of the water inlet pipe (9) and the water outlet pipe (10).

2. A microwave ablation needle for treating hemangioma and vascular malformation according to claim 1, characterized in that: A first mounting groove (201) is provided at the rear end of the ablation needle tube (2), and a limiting component for limiting the position of the ablation needle body (1) is provided in the first mounting groove (201).

3. A microwave ablation needle for treating hemangioma and vascular malformation according to claim 2, characterized in that: The limiting assembly comprises a limiting clamping plate (12) rotatably mounted on the side wall of the first mounting groove (201), the limiting clamping plate (12) being provided with two clearance grooves (13), and the ablation needle body (1) being provided with two positioning plates (14) matching the clearance grooves (13).

4. A microwave ablation needle for treating hemangioma and vascular malformation according to claim 3, characterized in that: An operating handle (15) is provided on the top of the position-limiting clamping plate (12), the operating handle (15) passes through the top of the ablation needle tube (2), and a sliding groove (16) communicating with the first mounting groove (201) is provided on the ablation needle tube (2).

5. A microwave ablation needle for treating hemangioma and vascular malformation according to claim 4, characterized in that: A torsion spring (18) is installed on one side of the sliding slot (16), and the torsion spring (18) is connected to the limiting clamping plate (12).

6. A microwave ablation needle for treating hemangioma and vascular malformation according to claim 5, characterized in that: A circle of rear limiting ring plate (19) is also provided in the first installation groove (201).

7. A microwave ablation needle for treating hemangioma and vascular malformation according to claim 6, characterized in that: The rear end of the ablation needle body (1) is connected to a square rod (20), and the rear side surface of the ablation needle tube (2) is provided with a square hole (202) corresponding to the square rod (20).

Images