Puncture needle assembly and ablation needle assembly

Abstract

The invention provides a puncture needle assembly and an ablation needle assembly, the puncture needle assembly comprises an ablation needle base, an ablation needle body and an ablation needle head, one end of the ablation needle body is arranged in the ablation needle base, and the ablation needle head is fixedly arranged at the other end of the ablation needle body. Compared with the prior art, the ablation needle has the following beneficial effects that through the four rows of stainless steel balls uniformly embedded in the outer surface of the guide sleeve, when the ablation needle moves along the puncture needle tube, the friction force between the guide sleeve and the inner wall of the needle tube is remarkably reduced, the ablation needle moves more smoothly, meanwhile, pressure is uniformly dispersed, and abrasion to the inner wall of the needle tube is reduced; therefore, the service life of the puncture needle tube is prolonged, the medical cost is reduced, the two ends of the guide sleeve are designed to be in a semi-spherical shape, the stability of movement of the guide sleeve in the puncture needle tube is guaranteed, the phenomenon of blocking or deviation is reduced, it is guaranteed that an ablation needle can accurately reach a target ablation position, and the accuracy of ablation treatment is further improved.

Description

Technical Field

[0001] The present invention relates to a puncture needle assembly and an ablation needle assembly, belonging to the field of medical intervention devices. Background Art

[0002] The puncture needle assembly is mainly used for accurately puncturing human tissues to open a path for subsequent ablation diagnosis or treatment operations. The ablation needle assembly is mainly used for ablating diseased tissues. The ablation needle assembly is usually used in cooperation with the puncture needle assembly to destroy diseased cells through energy transfer. The puncture needle assembly and the ablation needle assembly are extremely crucial instrument parts in medical intervention treatment.

[0003] In the prior art, when the puncture needle and the ablation needle are used in cooperation, the connection method between the two is unstable, mostly simple socketing. When the ablation needle moves in the needle tube of the puncture needle, the friction force is large, the movement is not smooth, the phenomenon of jamming or deviation is increased, so that the ablation needle cannot accurately reach the target ablation position, the treatment accuracy is reduced, and the ablation needle is also easy to cause wear on the inner wall of the needle tube, shortening the service life of the puncture needle and increasing the medical cost.

[0004] In summary, the present invention provides a puncture needle assembly and an ablation needle assembly to solve the above problems. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a puncture needle assembly and an ablation needle assembly to solve the problem of large frictional resistance when the ablation needle moves in the needle tube of the puncture needle as mentioned in the above background art.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions: A puncture needle assembly and an ablation needle assembly, including an ablation needle base, an ablation needle body and an ablation needle tip. One end of the ablation needle body extends into the interior of the ablation needle base, and the ablation needle tip is fixedly installed at the other end of the ablation needle body. A plurality of heat insulation components are uniformly and fixedly sleeved on the outer part of the ablation needle body from left to right.

[0007] Further, the heat insulation component includes a guide sleeve, the guide sleeve is sleeved on the outer part of the ablation needle body, and four rows of balls are uniformly embedded around the axis on the outer surface of the guide sleeve.

[0008] Further, the number of balls in each row is five, and both ends of the guide sleeve are in a semi-spherical shape.

[0009] Further, an annular groove for cooperating with the sleeving of the guide sleeve is formed on the surface of the ablation needle body, and a convex ring adapted to the annular groove is arranged on the inner surface of the guide sleeve.

[0010] Further, a sealing rubber seat is sleeved outside the ablation needle body and on one side of the ablation needle seat, and an annular groove is formed on the outer surface of the sealing rubber seat.

[0011] Further, the sealing rubber seat is fixedly connected to the ablation needle seat and is in contact with the ablation needle body.

[0012] A puncture needle assembly includes a puncture needle seat and a puncture needle tube. One end of the puncture needle tube is fixedly embedded on one side of the puncture needle seat. A conical cavity communicating with the port of the puncture needle tube is formed inside the puncture needle seat. One side of the ablation needle seat and one side of the puncture needle seat are mutually embedded by threads.

[0013] Further, the sealing rubber seat is mutually embedded with the conical cavity inside the puncture needle seat, and one end of the ablation needle body extends into the interior of the puncture needle tube through the conical cavity inside the puncture needle seat.

[0014] Further, the bead surface of the ball inside the heat insulation assembly is in contact with the inner wall of the puncture needle tube, and the needle tip of the puncture needle tube is obliquely cut and sharp.

[0015] Further, the inner diameter of the port of the puncture needle tube is the same as the size of the small-diameter port of the conical cavity inside the puncture needle seat, and anti-slip patterns of annular protrusions are uniformly arranged on the surface of the puncture needle seat from left to right.

[0016] Advantages of the present invention: Through four rows of stainless steel balls uniformly embedded on the outer surface of the guiding sleeve, when the ablation needle moves along the puncture needle tube, the friction between the guiding sleeve and the inner wall of the needle tube is significantly reduced, making the movement of the ablation needle smoother. At the same time, the pressure is evenly distributed, reducing the wear on the inner wall of the needle tube, thereby extending the service life of the puncture needle tube, reducing the medical cost. The design of the two ends of the guiding sleeve being semi-spherical ensures its smooth movement inside the puncture needle tube, reducing the phenomenon of jamming or deviation, ensuring that the ablation needle can accurately reach the target ablation position, and further improving the accuracy of ablation treatment.

[0017] Through the heat insulation assembly uniformly sleeved outside the ablation needle body, especially the guiding sleeve is made of polytetrafluoroethylene material, and its low coefficient of friction reduces the heat transfer generated by the friction between the needle body and the surrounding tissues during puncture, effectively reducing the risk of thermal damage to the surrounding normal tissues and protecting the surrounding healthy tissues. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious: Figure 1Stereogram of a puncture needle assembly and an ablation needle assembly of the present invention; Figure 2 Main sectional view of a puncture needle assembly and an ablation needle assembly of the present invention; Figure 3 is Figure 2 Main sectional view of the ablation needle body shown; Figure 4 is Figure 3 Front view of the ablation needle body shown; Figure 5 is Figure 2 Main sectional view of the puncture needle assembly shown; Figure 6 is Figure 4 Main sectional view of the heat insulation component shown; Figure 7 is Figure 6 Front view of the heat insulation component shown.

[0019] In the figure: 1. Ablation needle seat; 2. Ablation needle body; 3. Heat insulation component; 4. Ablation needle tip; 5. Puncture needle assembly; 6. Sealant seat; 31. Guide sleeve; 32. Ball; 51. Puncture needle seat; 52. Puncture needle tube. Detailed implementation manners

[0020] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the detailed implementation manners.

[0021] Please refer to Figures 1-7 , the present invention provides a technical solution: an ablation needle assembly, including an ablation needle seat 1, an ablation needle body 2 and an ablation needle tip 4. One end of the ablation needle body 2 extends into the interior of the ablation needle seat 1, and the ablation needle tip 4 is fixedly installed at the other end of the ablation needle body 2. Its material is selected as platinum-iridium alloy with high melting point, high hardness and good biocompatibility. The shape and size of the needle tip are specially designed according to different ablation treatment requirements, so as to better release energy during ablation and achieve an ideal ablation effect. The surface of the ablation needle tip 4 is specially treated with a nano-coating technology to improve its corrosion resistance and biocompatibility, and reduce the adverse reactions during use in human tissues. A plurality of heat insulation components 3 are uniformly fixedly sleeved on the outside of the ablation needle body 2 from left to right. The ablation needle body 2 is a key component for energy transmission and ablation operation, and is made of nickel-titanium alloy with good flexibility and conductivity.

[0022] Please refer to Figures 2-7, the heat insulation component 3 includes a guide sleeve 31. The guide sleeve 31 is sleeved outside the ablation needle body 2. Four rows of ball bearings 32 are evenly embedded in the outer surface of the guide sleeve 31 around the axis. The guide sleeve 31 of the heat insulation component 3 is made of polytetrafluoroethylene material with a low friction coefficient and good heat insulation performance, which further reduces the resistance during puncture and enhances the heat insulation effect. The number of ball bearings 32 in each row is five. Both ends of the guide sleeve 31 are semi-spherical. The ball bearings 32 are made of stainless steel with high hardness, good wear resistance and good biocompatibility. Both ends of the guide sleeve 31 are semi-spherical. This design not only reduces the risk of damage to the surrounding tissues by the guide sleeve 31 during puncture, but also makes the movement of the guide sleeve 31 in the puncture needle cannula 52 more stable, reducing the possibility of jamming or deviation. An annular groove for the guide sleeve 31 to be sleeved is provided on the surface of the ablation needle body 2. A convex ring adapted to the annular groove is provided on the inner surface of the guide sleeve 31. A sealing rubber seat 6 is sleeved outside the ablation needle body 2 and on one side of the ablation needle seat 1. An annular groove is provided on the outer surface of the sealing rubber seat 6. The ablation needle body 2 is a hollow structure, and a wire or optical fiber for transmitting energy is arranged inside it. One end of the wire or optical fiber is connected to the energy connection port in the ablation needle seat 1, and the other end extends to the ablation needle tip 4 to achieve precise energy transmission. A temperature sensor is provided at the front end of the ablation needle tip 4. The temperature sensor is connected to the temperature monitoring module in the ablation needle seat 1 through a wire, and can monitor the temperature of the ablation area in real time and feedback it to the external control system to timely adjust the ablation parameters. The sealing rubber seat 6 is fixedly connected to the ablation needle seat 1 and is in contact with the ablation needle body 2. The ablation needle seat 1 is made of engineering plastic material with high strength and good insulation performance to ensure electrical safety and structural stability during operation.

[0023] Please refer to Figures 1-5, a puncture needle assembly. The puncture needle assembly 5 includes a puncture needle hub 51 and a puncture needle cannula 52. One end of the puncture needle cannula 52 is fixedly embedded on one side of the puncture needle hub 51. A conical cavity communicating with the port of the puncture needle cannula 52 is provided inside the puncture needle hub 51. One side of the ablation needle hub 1 and one side of the puncture needle hub 51 are mutually embedded through threads. This threaded connection method has the advantages of firm connection and convenient disassembly, and can ensure the relative position stability between the puncture needle assembly 5 and the ablation needle assembly during the treatment process, and will not loosen or displace due to external forces during the operation. The sealant seat 6 is mutually embedded with the conical cavity inside the puncture needle hub 51. One end of the ablation needle body 2 extends into the inside of the puncture needle cannula 52 through the conical cavity inside the puncture needle hub 51. After puncturing in place, the puncture needle stylet is withdrawn from the inside of the puncture needle cannula 52, and the ablation needle body 2 can be inserted into the inside of the puncture needle cannula 52. The sealant seat 6 effectively prevents impurities such as liquid, gas or tissue debris from entering the inside of the needle hub and affecting the normal operation of the ablation needle, ensuring the cleanliness and safety of the treatment environment. The spherical surface of the ball 32 inside the heat insulation component 3 is in contact with the inner wall of the puncture needle cannula 52. The tip of the puncture needle cannula 52 is beveled and sharp. This design makes it easier for the puncture needle to puncture human tissues, can effectively reduce the puncture resistance, and reduce the damage to the surrounding tissues. Four rows of balls 32 are evenly embedded around the axis on the outer surface of the guide sleeve 31, which greatly reduces the friction between the guide sleeve 31 and the inner wall of the puncture needle cannula 52, makes the movement of the ablation needle in the puncture needle cannula 52 smoother, and also reduces the wear on the inner wall of the puncture needle cannula 52. The balls 32 are evenly embedded on the outer surface of the guide sleeve 31, and their spherical surfaces can achieve good contact with the inner wall of the puncture needle cannula 52. While ensuring smooth sliding, it can also effectively disperse the pressure, avoid excessive local pressure from damaging the inner wall of the puncture needle cannula 52, and extend the service life of the puncture needle cannula 52. The inner diameter of the port of the puncture needle cannula 52 is the same as the size of the small-diameter port of the conical cavity inside the puncture needle hub 51. Anti-slip patterns in the form of annular protrusions are evenly arranged on the surface of the puncture needle hub 51 from left to right. The design of these anti-slip patterns is to increase the friction when the doctor holds the puncture needle hub 51, make the operation more stable and reliable, and avoid puncture mistakes caused by slippery hands during the puncture process.

[0024] Specific implementation method: By the doctor holding the puncture needle hub 51, the annular protrusion anti-slip patterns on the surface of the puncture needle hub 51 increase the friction between the hand and the needle hub, ensuring stable operation. The tip of the puncture needle cannula 52 is beveled and sharp. When contacting human tissues, it can effectively reduce the puncture resistance and reduce the damage to the surrounding tissues, facilitating the puncture needle assembly 5 to accurately puncture to the target position.

[0025] After the puncture is in place, the stylet of the puncture needle is withdrawn. Since the ablation needle seat 1 and the puncture needle seat 51 are tightly connected by threads, the ablation needle assembly can be stably installed on the puncture needle assembly 5. The ablation needle body 2 extends into the puncture needle tube 52 through the conical cavity inside the puncture needle seat 51. The sealant seat 6 is respectively embedded with the ablation needle seat 1 and the conical cavity inside the puncture needle seat 51, effectively preventing impurities from entering and ensuring the normal working environment of the ablation needle.

[0026] The ablation needle body 2 is made of nitinol alloy, which has good flexibility and conductivity. One end of the wire or optical fiber inside it is connected to the energy connection port inside the ablation needle seat 1, and the other end extends to the ablation needle tip 4. Energy is transmitted from an external device through the wire or optical fiber inside the ablation needle seat 1 and the ablation needle body 2 to the ablation needle tip 4. The needle tip is made of platinum-iridium alloy with high melting point, high hardness and good biocompatibility. With its specially designed shape and size, it can efficiently release energy after reaching the target ablation area, raising the temperature of the diseased tissue and achieving an ideal ablation effect. At the same time, the temperature sensor at the front end of the ablation needle tip 4 monitors the temperature of the ablation area in real time, and feeds back the temperature information to the temperature monitoring module inside the ablation needle seat 1 through a wire, and then transmits it to an external control system. Doctors can adjust ablation parameters such as energy output in a timely manner according to the temperature data to ensure the safety and effectiveness of the ablation process.

[0027] Multiple heat insulation components 3 evenly sleeved outside the ablation needle body 2 play an important role. The guide sleeve 31 is made of polytetrafluoroethylene material, which has a low friction coefficient and good heat insulation performance. On the one hand, it reduces the heat transfer generated by the friction between the needle body and the surrounding tissues during the puncture process, reducing the risk of thermal damage to the surrounding normal tissues.

[0028] Four rows of ball bearings 32 are evenly embedded on the outer surface of the guide sleeve 31, with five in each row. They are made of stainless steel, and their spherical surfaces are in contact with the inner wall of the puncture needle tube 52. During the movement of the ablation needle along the puncture needle tube 52, the ball bearings 32 greatly reduce the friction between the guide sleeve 31 and the inner wall of the needle tube, making the movement of the ablation needle smoother. At the same time, they evenly disperse the pressure, reducing the wear on the inner wall of the needle tube and extending the service life of the puncture needle tube 52. The two ends of the guide sleeve 31 are semi-spherical, which not only reduces the risk of damage to the surrounding tissues during puncture, but also ensures its stable movement inside the puncture needle tube 52, reducing jamming or deviation, and ensuring that the ablation needle can accurately reach the target ablation position.

[0029] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An ablation needle assembly, comprising an ablation needle seat (1), an ablation needle body (2) and an ablation needle head (4), characterized in that: One end of the ablation needle body (2) is evenly inserted into the interior of the ablation needle seat (1), and the ablation needle head (4) is fixedly mounted on the other end of the ablation needle body (2). The exterior of the ablation needle body (2) is evenly and fixedly covered with a plurality of heat insulation components (3) from left to right.

2. A puncture needle assembly and an ablation needle assembly according to claim 1, characterized in that: The heat insulation component (3) comprises a guide sleeve (31), the guide sleeve (31) being sleeved on the outside of the ablation needle body (2), and the outer surface of the guide sleeve (31) being evenly embedded with four rows of balls (32) around the axis.

3. The ablation needle assembly according to claim 2, characterized in that: The number of balls (32) in each row is five, and both ends of the guide sleeve (31) are semi-spherical.

4. The ablation needle assembly according to claim 2, characterized in that: The surface of the ablation needle body (2) is provided with an annular groove that matches the sleeve of the guide sleeve (31), and the inner surface of the guide sleeve (31) is provided with a convex ring that matches the annular groove.

5. The ablation needle assembly according to claim 1, characterized in that: A sealant seat (6) is sleeved on the outside of the ablation needle body (2) and located on one side of the ablation needle seat (1), and an annular groove is formed on the outer surface of the sealant seat (6).

6. The ablation needle assembly according to claim 5, characterized in that: The sealant seat (6) is fixedly connected to the ablation needle seat (1), and the sealant seat (6) is in contact with the ablation needle body (2).

7. A puncture needle assembly, used for inserting the ablation needle assembly according to any one of claims 2 to 4, characterized in that: The puncture needle assembly (5) comprises a puncture needle seat (51) and a puncture needle tube (52), one end of the puncture needle tube (52) being fixedly embedded in one side of the puncture needle seat (51), the interior of the puncture needle seat (51) being provided with a conical through cavity which is connected to the port of the puncture needle tube (52), and one side of the ablation needle seat (1) and one side of the puncture needle seat (51) being embedded in each other via a thread.

8. A puncture needle assembly according to claim 7, characterized in that: The sealant seat (6) and the conical through cavity inside the puncture needle seat (51) are mutually embedded, and one end of the ablation needle body (2) extends through the conical through cavity inside the puncture needle seat (51) to the inside of the puncture needle tube (52).

9. A puncture needle assembly according to claim 7, characterized in that: The bead surface of the ball (32) inside the heat insulation component (3) contacts the inner wall of the puncture needle tube (52), and the needle tip of the puncture needle tube (52) is beveled and sharp.

10. The puncture needle assembly according to claim 7, characterized in that: The inner diameter of the port of the puncture needle tube (52) is the same as the size of the small diameter port of the conical through cavity inside the puncture needle seat (51), and the surface of the puncture needle seat (51) is evenly provided with annular raised anti-slip patterns from left to right.

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