Cold adhesion coring biopsy needle

Abstract

The invention provides a cold-sticking coring biopsy needle, and belongs to the technical field of cold-sticking coring biopsy, the cold-sticking coring biopsy needle comprises a shell, a biopsy assembly, a guide assembly, a rotating assembly and a cold-sticking agent adding assembly, the shell is in a hollow cylindrical shape and is made of medical grade stainless steel, and the biopsy assembly is made of stainless steel. The support is used for supporting the biopsy assembly placed in the shell; the shell comprises an inner pipe and an outer pipe, the inner pipe is sleeved with the outer pipe, and the inner pipe and the outer pipe slide relative to each other; the near end of the outer tube is connected with the rotating assembly, the far end of the outer tube is connected with the biopsy assembly, and the near end of the inner tube is connected with the other side of the biopsy assembly; the guide assembly is arranged between the inner pipe and the outer pipe; the invention provides a cold-sticking coring biopsy needle which can solve the problem that a needle head of an existing cold-sticking coring biopsy needle is very small, and multi-point sampling is difficult to carry out on a biopsy position under the condition that the original pain feeling is small.

Description

Technical Field

[0001] The invention belongs to the technical field of cold-adhesive coring biopsy, and in particular relates to a cold-adhesive coring biopsy needle. Background Art

[0002] The cold-stick core biopsy needle is a medical device used to collect samples from internal human tissues, and is mainly used for image-guided biopsy operations. Biopsy is an indispensable means of diagnosing many diseases (such as tumors, inflammation, infection, etc.). Obtaining samples of diseased tissue for pathological analysis helps to determine the nature and extent of the disease and formulate treatment plans. Traditional biopsy techniques are mostly puncture or cutting, which require manual operation or the use of simple mechanical tools. Although this method is widely used, it also has some problems: traditional puncture or cutting methods often rely on the experience of physicians, and deviations are prone to occur during the operation, resulting in inaccurate sampling or insufficient samples, affecting the diagnosis results. Traditional biopsy needles require a large puncture force during operation, which may cause greater trauma to patients, especially in deep tissues or more sensitive areas. During traditional biopsy operations, the needle is prone to puncturing surrounding blood vessels or tissues during puncture, which may cause complications such as bleeding and infection.

[0003] The cold-adhesive core biopsy needle uses cold-adhesive technology, which means that by injecting cooling liquid into the biopsy needle, the tissue is adhered to the inner wall of the biopsy needle through low temperature during the tissue cutting process. The cold mucus can not only fix the sampled tissue to prevent it from shifting in the needle tube, but also reduce tissue damage and the risk of bleeding. The cooling effect can also relieve thermal damage to the tissue and reduce the inflammatory response at the biopsy site. The cold-adhesive core biopsy needle can accurately control the insertion depth and direction of the biopsy needle through advanced rotating blades and automated devices, and ensure that the needle can be accurately positioned in the lesion area through image guidance (such as ultrasound, CT, MRI, etc.), avoiding damage to surrounding normal tissues and improving the quality and accuracy of sampling. Compared with traditional manual cutting biopsy tools, the cold-adhesive core biopsy needle is more delicate in design and less traumatic when inserted. Its cold-adhesive technology helps reduce pulling or compression on tissues and reduces patient pain.

[0004] The needle of the existing cold-stick core biopsy needle is very small, and it is difficult to perform multi-point sampling at the biopsy site while ensuring that the original pain is small. Summary of the invention

[0005] In view of this, the present invention provides a cold-adhesive coring biopsy needle, which can solve the problem that the needle head of the existing cold-adhesive coring biopsy needle is very small, making it difficult to perform multi-point sampling on the biopsy position while ensuring that the original pain is small.

[0006] The present invention is achieved in that:

[0007] The present invention provides a cold-adhesive coring biopsy needle, which comprises a shell, a biopsy component, a guide component, a rotating component and a cold-adhesive adding component. The shell is a hollow cylindrical shape, made of medical-grade stainless steel, and is used to support the biopsy component placed inside the shell; the shell comprises an inner tube and an outer tube, the inner tube is sleeved in the outer tube, and the two slide relative to each other; the proximal end of the outer tube is connected to the rotating component, the distal end is connected to the biopsy component, and the proximal end of the inner tube is connected to the other side of the biopsy component; the guide component is arranged between the inner tube and the outer tube, and the guide component is used to limit the axial rotation direction of the biopsy component; the rotating component is used to drive the biopsy component to rotate at a high speed for cold-adhesive coring; the cold-adhesive adding component is arranged in the side wall of the shell, and the cold-adhesive adding component is used to release cold-adhesive liquid to the end of the biopsy component through a through-connected channel;

[0008] The biopsy assembly includes a rotating blade and a core needle assembly. The rotating blade is conical and made of medical-grade stainless steel. It is connected to the distal end of the outer tube and is used to cut tissue. The core needle assembly includes a core needle and a spring. The core needle is an elongated cylindrical shape and is made of medical-grade stainless steel. The spring is sleeved on the core needle to provide power for the extension and retraction of the core needle. The core needle assembly is located at the proximal end of the inner tube.

[0009] On the basis of the above technical solution, the cold-adhesive coring biopsy needle of the present invention can also be improved as follows:

[0010] The guide assembly includes a positioning ring and a scale. The positioning ring is sleeved on the outer tube and can slide along the axial direction of the outer tube. The scale is fixed on the outer tube to indicate the position of the positioning ring and the depth of the needle insertion. The outer wall of the inner tube is provided with a spiral guide groove, which cooperates with the spiral protrusion on the inner wall of the outer tube, so that the inner tube can move axially synchronously when the rotating assembly drives the outer tube to rotate, so as to realize rotary cutting and coring.

[0011] An elastic buckle is arranged on the inner side of the positioning ring, and the buckle corresponds to the scale line on the outer tube, so that the positioning ring can be fixed at a preset position to achieve precise positioning.

[0012] Furthermore, the tip of the core needle is beveled and has a core hole for allowing the cut tissue to enter the core needle; the surface of the core needle is coated with a Teflon coating to reduce tissue adhesion and improve the success rate of core extraction;

[0013] The outer surface of the rotating blade is provided with a spiral blade, and the blade is covered with a diamond coating to improve cutting efficiency and wear resistance; the rotating blade is connected to the outer tube by a threaded connection.

[0014] Furthermore, the guide assembly also includes a vacuum-assisted device, which includes a vacuum pump connected to the proximal end of the inner tube and a vacuum tube connected to the vacuum pump; the vacuum tube and the inner tube are connected by a three-way valve, which is used to apply negative pressure during the coring process to suck the cut tissue into the core needle, thereby improving the coring efficiency.

[0015] Furthermore, a shock-absorbing washer is provided at the top of the contact portion between the bottom of the biopsy component and the shell. The shock-absorbing washer is a circular ring structure. The outer wall of the shock-absorbing washer is fixedly connected to the inner wall of the shell, and the inner wall of the shock-absorbing washer is fixedly connected to the outer wall of the biopsy component, so as to reduce the vibration generated when the biopsy component rotates.

[0016] Furthermore, a stirring wire is arranged on the outer wall of the core needle, and the stirring wire includes a plurality of stirring wires, which are arc-shaped, and the spacing between the stirring wires is one of the same, increasing in sequence, and decreasing in sequence, so as to adjust the sampling rate and quantity of the biopsy needle;

[0017] The spacing between adjacent stirring wires is 0.01-0.1 mm, which is used to adjust the sampling volume and the degree of narrowness of the sampling site;

[0018] The shapes of the multiple stirring wires are completely the same, and the bending direction of the bottoms thereof is the same as the rotation direction of the rotating component, so as to be used for biopsy sampling by inward contraction and rotation;

[0019] The arc-shaped structure of the stirring wire includes a bottom inward contraction structure and a top outward expansion structure, the top of the top outward expansion structure is fixedly connected to the bottom of the shell, and the bottom inward contraction structure is integrally connected to the top outward expansion structure; the curvature of the bottom inward contraction structure is greater than the curvature of the top outward expansion structure.

[0020] Furthermore, the inner wall of the inner tube is provided with a cold mucus adding channel, and the position of the core needle assembly corresponding to the cold mucus adding channel is correspondingly provided with a cold mucus entering channel, and the cold mucus adding channel is connected through the cold mucus entering channel, and is used to drive the cold mucus to the end of the core needle assembly;

[0021] The cold adhesive adding assembly includes the cold adhesive adding channel and the cold adhesive entering channel;

[0022] The cold mucus is a mixture of propane, butane, isopropanol and glycerol, and is used to vaporize quickly when the biopsy component contacts the location of the tissue to be sampled, so that the sample in the tissue adheres to the end of the core needle component and is absorbed into the interior of the core needle component;

[0023] A cold adhesive storage cavity is arranged on one side of the inner tube, and a plurality of micro-diaphragms are arranged in the cold adhesive storage cavity to divide the storage cavity into a plurality of independent small chambers, and each small chamber stores a certain amount of cold adhesive.

[0024] Furthermore, the rotating assembly includes a rotating motor, a reducer and a transmission member, wherein the rotating motor is fixed to the top of the housing, and the reducer is fixed to the output shaft position of the rotating motor to reduce the rotation speed of the rotating motor; the top of the transmission member is fixedly connected to the output shaft of the reducer, and its side wall is arranged between the inner wall of the housing and the outer wall of the biopsy assembly to drive the biopsy assembly to rotate;

[0025] The inner wall of the transmission member is provided with threads, and the threads on the outer wall of the shell are adapted to each other, so as to drive the biopsy component to rotate through the threads.

[0026] Furthermore, a control switch is provided on the top of the housing, and the control switch includes two parts, namely a closed loop component and a pressing component, the closed loop component is fixed inside the pressing component, and the rotating motor, the power supply and the closed loop component are connected by wires;

[0027] The pressing component is made of flexible rubber material.

[0028] Furthermore, the closed-loop component is a pressure ceramic, and the current generated by pressing the pressure ceramic is used to close the loop between the rotating motor, the power source and the closed-loop component;

[0029] A comparator is arranged between the pressure ceramic and the power supply, and a threshold is arranged in the comparator.

[0030] Compared with the prior art, the cold-bonded core biopsy needle provided by the present invention has the following beneficial effects:

[0031] The main function of the shell is to support the internal biopsy components and ensure the structural stability of the biopsy needle. It is made of medical grade stainless steel, which has sufficient strength and corrosion resistance to ensure that it can withstand external pressure during surgery. It consists of an inner tube and an outer tube. The inner tube is inserted into the outer tube and the two slide relative to each other, providing precise positioning and sliding support for the biopsy component. The proximal end of the outer tube is connected to the rotating component, and the distal end is connected to the biopsy component. The connection between the inner tube and the biopsy component ensures precise operation during sampling.

[0032] The biopsy assembly includes a rotating blade and a core needle assembly. The rotating blade is used to cut tissue, and the core needle assembly is used for sampling. The rotating blade adopts a conical design, and the spiral blade with a diamond coating can improve cutting efficiency, reduce friction, and improve wear resistance, ensuring that it is not easy to wear after long-term use. The core needle assembly includes a slender cylindrical core needle, which provides the basis for tissue cutting. The spring design makes the core needle have a certain degree of elasticity, thereby realizing rapid tissue sampling.

[0033] The main function of the guide assembly is to limit the axial rotation direction of the biopsy assembly, ensure the precise positioning of the assembly during the rotation process, and avoid deviation. It consists of a positioning ring and a scale. The positioning ring slides along the outer tube, and the scale can visually display the depth and position of the needle, thereby ensuring the sampling accuracy. The assembly also has a spiral guide groove, which, in conjunction with the spiral protrusion on the inner wall of the outer tube, enables the inner tube to move axially under the drive of the rotating assembly, helping to achieve efficient rotary cutting.

[0034] The rotating assembly includes a rotating motor, a reducer and a transmission member, which is mainly used to drive the high-speed rotation of the biopsy assembly to achieve tissue cutting during the cold sticking coring process. The rotating motor drives the reducer, which reduces the rotation speed, so that the rotating blade can cut the tissue more smoothly and improve the cutting accuracy. The transmission member is connected to the biopsy assembly through a thread to achieve power transmission and ensure the stable rotation of the biopsy assembly.

[0035] The cold mucus adding component can release cold mucus to the end of the biopsy component through the cold mucus adding channel provided on the side wall of the housing. Cold mucus (such as a mixture of propane, butane, isopropanol and glycerol) vaporizes quickly and forms viscosity, so that the cut tissue can be quickly attached to the end or inside of the core needle, thereby improving the success rate of sampling. The rapid vaporization of cold mucus also plays a cooling role, avoiding tissue damage caused by excessive temperature.

[0036] In order to ensure the timely release of the cold adhesive, multiple micro-diaphragms are provided in the cold adhesive addition component to divide the cold adhesive into small amounts for release, thereby improving accuracy and controllability.

[0037] The core needle is an important part of the biopsy component. It is designed as a slender cylindrical shape to facilitate entry into the tissue and complete tissue sampling. The bevel design and core hole at the tip of the core needle ensure that the cut tissue can smoothly enter the core needle. The Teflon coating on the surface can reduce adhesion with the tissue, ensure smoothness during the sampling process, and thus improve the success rate of sampling.

[0038] The shock-absorbing washer is installed at the contact point between the biopsy component and the shell, which can reduce the vibration generated by the biopsy component when it rotates at high speed, reduce the impact on the tissue, and improve the stability and comfort of the operation. The material and structural design of the shock-absorbing washer ensure good shock absorption effect and avoid the influence of vibration on sampling accuracy.

[0039] The stirring wire is designed to adjust the sampling rate and quantity of the biopsy needle. Its arc structure can help guide the sampling during the rotation process, increasing the effectiveness of sampling. The spacing design of the stirring wire can be adjusted for different sampling volumes and narrow parts, ensuring that samples can be effectively obtained in complex anatomical environments. The bottom of the stirring wire is retracted inward to match the rotation direction of the rotating component, effectively improving the sampling efficiency.

[0040] The vacuum assist device applies negative pressure during the coring process through a vacuum pump and vacuum tube system to help suck the cut tissue into the core needle. This negative pressure effect can improve the efficiency of coring, ensure that the tissue sample can be sucked in completely, and reduce sample loss.

[0041] The control switch is used to start and stop the rotary motor and is designed for easy operation during surgery. The closed-loop component inside the switch generates current through pressure ceramics to control the start of the rotary motor, achieving simple and precise operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0043] Figure 1 It is a schematic diagram of the structure of a cold-adhesive core biopsy needle;

[0044] Figure 2 is a schematic diagram of the structure of the rotating assembly;

[0045] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0046] 10. Shell; 20. Biopsy assembly; 21. Rotating blade; 22. Core needle assembly; 23. Shock-absorbing washer; 30. Guide assembly; 40. Rotating assembly; 41. Rotating motor; 42. Reducer; 43. Transmission member; 50. Cold adhesive adding assembly. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0048] like Figure 1-2As shown, it is an embodiment of a cold-adhesive coring biopsy needle provided by the present invention. In this embodiment, it includes a shell 10, a biopsy component 20, a guide component 30, a rotating component 40 and a cold adhesive adding component 50. The shell 10 is a hollow cylindrical shape, made of medical-grade stainless steel, and is used to support the biopsy component 20 placed inside the shell 10; the shell 10 includes an inner tube and an outer tube, the inner tube is sleeved in the outer tube, and the two slide relative to each other; the proximal end of the outer tube is connected to the rotating component 40, the distal end is connected to the biopsy component 20, and the proximal end of the inner tube is connected to the other side of the biopsy component 20; a guide component 30 is arranged between the inner tube and the outer tube, and the guide component 30 is used to limit the axial rotation direction of the biopsy component 20; the rotating component 40 is used to drive the biopsy component 20 to rotate at a high speed for cold-adhesive coring; a cold adhesive adding component 50 is arranged in the side wall of the shell 10, and the cold adhesive adding component 50 is used to release cold adhesive liquid to the end of the biopsy component 20 through a through-connected channel;

[0049] The biopsy assembly 20 includes a rotating blade 21 and a core needle assembly 22. The rotating blade 21 is conical and made of medical-grade stainless steel. It is connected to the distal end of the outer tube and is used to cut tissue. The core needle assembly 22 includes a core needle and a spring. The core needle is in the shape of a slender cylinder and is made of medical-grade stainless steel. The spring is sleeved on the core needle to provide power for the extension and retraction of the core needle. The core needle assembly is located at the proximal end of the inner tube.

[0050] Among them, in the above technical solution, the guide assembly 30 includes a positioning ring and a scale. The positioning ring is sleeved on the outer tube and can slide along the axial direction of the outer tube. The scale is fixed on the outer tube to indicate the position of the positioning ring and the depth of the needle insertion. The outer wall of the inner tube is provided with a spiral guide groove, and the guide groove cooperates with the spiral protrusion on the inner wall of the outer tube, so that the inner tube is synchronously axially moved when the rotating assembly 40 drives the outer tube to rotate, so as to realize rotary cutting and coring.

[0051] An elastic buckle is provided on the inner side of the positioning ring, and the buckle corresponds to the scale line on the outer tube, which can fix the positioning ring at a preset position to achieve precise positioning.

[0052] Furthermore, in the above technical solution, the tip of the core needle is beveled and has a core hole for allowing the cut tissue to enter the core needle; the surface of the core needle is coated with a Teflon coating to reduce tissue adhesion and improve the success rate of core extraction;

[0053] The outer surface of the rotating blade 21 is provided with a spiral blade, and the blade is covered with a diamond coating to improve cutting efficiency and wear resistance; the rotating blade 21 is connected to the outer tube by a threaded connection.

[0054] Furthermore, in the above technical solution, the guide assembly 30 also includes a vacuum-assisted device, which includes a vacuum pump connected to the proximal end of the inner tube and a vacuum tube connected to the vacuum pump; the vacuum tube and the inner tube are connected by a three-way valve, which is used to apply negative pressure during the coring process to suck the cut tissue into the core needle, thereby improving the coring efficiency.

[0055] Furthermore, in the above technical solution, a shock-absorbing gasket 23 is provided at the top of the part where the bottom of the biopsy component 20 contacts the shell 10. The shock-absorbing gasket 23 is a circular ring structure. The outer wall of the shock-absorbing gasket 23 is fixedly connected to the inner wall of the shell 10, and the inner wall of the shock-absorbing gasket 23 is fixedly connected to the outer wall of the biopsy component 20, so as to reduce the vibration generated when the biopsy component 20 rotates.

[0056] Furthermore, in the above technical solution, a stirring wire is arranged on the outer wall of the core needle, and the stirring wire includes a plurality of stirring wires, which are arc-shaped, and the spacing between the stirring wires is the same, increases successively, or decreases successively, so as to adjust the sampling rate and quantity of the biopsy needle;

[0057] The spacing between adjacent stirring wires is 0.01-0.1mm, which is used to adjust for different sampling volumes and the narrowness of the sampling site;

[0058] The shapes of the plurality of stirring wires are identical, and the bending direction of the bottoms thereof is the same as the rotation direction of the rotating assembly, so as to be used for biopsy sampling by inward contraction and rotation;

[0059] The arc-shaped structure of the stirring wire includes a bottom inward contraction structure and a top outward expansion structure. The top of the top outward expansion structure is fixedly connected to the bottom of the shell, and the bottom inward contraction structure is integrally connected to the top outward expansion structure. The curvature of the bottom inward contraction structure is greater than that of the top outward expansion structure.

[0060] Further, in the above technical solution, the inner wall of the inner tube is provided with a cold mucus adding channel, and the position of the core needle assembly 22 corresponding to the cold mucus adding channel is correspondingly provided with a cold mucus entering channel, and the cold mucus adding channel is connected with the cold mucus entering channel, and is used to drive the cold mucus to the end of the core needle assembly 22;

[0061] The cold adhesive adding assembly 50 includes a cold adhesive adding channel and a cold adhesive entering channel;

[0062] The cold mucus is a mixture of propane, butane, isopropanol and glycerin, and is used to vaporize quickly when the biopsy assembly 20 contacts the location of the tissue to be sampled, so that the sample in the tissue adheres to the end of the core needle assembly 22 and is absorbed into the interior of the core needle assembly 22;

[0063] A cold adhesive storage cavity is arranged on one side of the inner tube, and a plurality of micro-diaphragms are arranged in the cold adhesive storage cavity to divide the storage cavity into a plurality of independent small chambers, and each small chamber stores a certain amount of cold adhesive.

[0064] Further, in the above technical solution, the rotating assembly 40 includes a rotating motor 41, a reducer 42 and a transmission member 43. The rotating motor 41 is fixed to the top of the housing 10, and the reducer 42 is fixed to the output shaft position of the rotating motor 41, and is used to slow down the rotation speed of the rotating motor 41; the top of the transmission member 43 is fixedly connected to the output shaft of the reducer 42, and its side wall is arranged between the inner wall of the housing 10 and the outer wall of the biopsy assembly 20, and is used to drive the biopsy assembly 20 to rotate;

[0065] The inner wall of the transmission member 43 is provided with threads, and the threads on the outer wall of the housing 10 are adapted to each other, so as to drive the biopsy component 20 to rotate through the threads.

[0066] Further, in the above technical solution, a control switch is provided on the top of the housing 10, and the control switch includes two parts, namely a closed loop component and a pressing component, the closed loop component is fixed inside the pressing component, and the rotating motor 41, the power supply and the closed loop component are connected by wires;

[0067] The pressing component is made of flexible rubber.

[0068] Further, in the above technical solution, the closed-loop component is a pressure ceramic, and the current generated by the pressure ceramic by pressing is used to close the loop between the rotating motor 41, the power supply and the closed-loop component;

[0069] A comparator is arranged between the pressure ceramic and the power supply, and a threshold is arranged in the comparator.

[0070] Specifically, the principle of the present invention is: before use, according to clinical needs, select an appropriate sampling position. The sampling point is usually determined by image guidance (such as ultrasound, CT or MRI). According to the patient's condition, local anesthesia or general anesthesia is used to ensure patient comfort and reduce discomfort during sampling. Ensure that the various components of the cold sticky core biopsy needle are intact and properly installed. Align the guide assembly with the target site and ensure that the guide device is firmly fixed. By inserting the needle tube, the outer tube of the biopsy needle is docked with the target site. The insertion angle and depth can be adjusted according to image guidance. Press the control switch to start the rotating motor to ensure that the rotating blade starts to rotate at high speed. The rotating blade will cut the tissue at the tip of the biopsy needle and gradually enter the target area. The cold mucus system releases the cold mucus to the tip of the biopsy needle in time through the set channel, helping to adhere the cut tissue to the core needle, and plays a role in cooling and reducing tissue damage. During the rotation process, the rotating blade will effectively cut and collect tissue to ensure that the sample is complete and intact. The needle insertion depth is monitored in real time through a scale or display system to ensure the accurate insertion of the biopsy needle. After sampling is completed, stop the rotating motor and ensure that the rotating blade stops working. Slowly and steadily withdraw the biopsy needle from the body, taking care to avoid further damage to the tissue during the operation. Check whether the tissue sample has been successfully collected through the sampling device in the biopsy needle. If the sample is insufficient or damaged, you can choose to repeat the operation or adjust the sampling position. Carefully place the removed tissue sample in an appropriate storage container, such as saline or other fixing liquid, and prepare it for examination and pathological analysis. After the operation, the equipment should be cleaned up, especially the residual liquid in the cold mucus system, to avoid long-term effects on the equipment.

Claims

1. A cold-bonded coring biopsy needle, characterized in that: The invention comprises a shell (10), a biopsy component (20), a guide component (30), a rotation component (40) and a cold adhesive adding component (50), wherein the shell (10) is in the shape of a hollow cylinder and is made of medical grade stainless steel, and is used to support the biopsy component (20) placed inside the shell (10); the shell (10) comprises an inner tube and an outer tube, wherein the inner tube is sleeved inside the outer tube, and the two tubes slide relative to each other; the proximal end of the outer tube is connected to the rotation component (40), and the distal end is connected to the biopsy component (20); the proximal end of the inner tube is connected to the The other side of the biopsy component (20); the guide component (30) is arranged between the inner tube and the outer tube, and the guide component (30) is used to limit the axial rotation direction of the biopsy component (20); the rotation component (40) is used to drive the biopsy component (20) to rotate at a high speed to perform cold-adhesive coring; the cold-adhesive adding component (50) is arranged in the side wall of the shell (10), and the cold-adhesive adding component (50) is used to release cold-adhesive liquid to the end of the biopsy component (20) through a through-connected channel; The biopsy assembly (20) comprises a rotating blade (21) and a core needle assembly (22). The rotating blade (21) is conical and made of medical-grade stainless steel. It is connected to the distal end of the outer tube and is used for cutting tissue. The core needle assembly (22) comprises a core needle and a spring. The core needle is slender and cylindrical and is made of medical-grade stainless steel. The spring is sleeved on the core needle to provide power for the extension and retraction of the core needle. The core needle assembly is located at the proximal end of the inner tube.

2. A cold-bonded coring biopsy needle according to claim 1, characterized in that: The guide assembly (30) comprises a positioning ring and a scale, wherein the positioning ring is sleeved on the outer tube and can slide along the axial direction of the outer tube, and the scale is fixed on the outer tube and is used to indicate the position of the positioning ring and the insertion depth of the needle; the outer wall of the inner tube is provided with a spiral guide groove, and the guide groove cooperates with the spiral protrusion on the inner wall of the outer tube, so that when the rotating assembly (40) drives the outer tube to rotate, the inner tube synchronously moves axially, so as to realize rotary cutting and coring; An elastic buckle is arranged on the inner side of the positioning ring, and the buckle corresponds to the scale line on the outer tube, so that the positioning ring can be fixed at a preset position to achieve precise positioning.

3. A cold-bonded coring biopsy needle according to claim 2, characterized in that: The tip of the core needle is beveled and has a core hole for allowing the cut tissue to enter the core needle; the surface of the core needle is coated with a Teflon coating to reduce tissue adhesion and improve the success rate of core extraction; The outer surface of the rotating blade (21) is provided with a spiral blade, and the blade is covered with a diamond coating to improve cutting efficiency and wear resistance; the rotating blade (21) is connected to the outer tube by a threaded connection.

4. The cold-bonded coring biopsy needle according to claim 3, characterized in that: The guide assembly (30) also includes a vacuum assist device, which includes a vacuum pump connected to the proximal end of the inner tube and a vacuum tube connected to the vacuum pump; the vacuum tube and the inner tube are connected via a three-way valve, which is used to apply negative pressure during the coring process to suck the cut tissue into the core needle, thereby improving the coring efficiency.

5. The cold-bonded coring biopsy needle according to claim 4, characterized in that: A shock-absorbing washer (23) is provided at the top of the portion where the bottom of the biopsy component (20) contacts the shell (10); the shock-absorbing washer (23) is a circular ring structure; the outer wall of the shock-absorbing washer (23) is fixedly connected to the inner wall of the shell (10); the inner wall of the shock-absorbing washer (23) is fixedly connected to the outer wall of the biopsy component (20), and is used to reduce vibration generated when the biopsy component (20) rotates.

6. The cold-bonded coring biopsy needle according to claim 5, characterized in that: A stirring wire is arranged on the outer wall of the core needle, and the stirring wire includes a plurality of stirring wires, which are arc-shaped, and the spacing between the stirring wires is one of the same, increasing in sequence, and decreasing in sequence, so as to adjust the sampling rate and quantity of the biopsy needle; The spacing between adjacent stirring wires is 0.01-0.1 mm, which is used to adjust the sampling volume and the degree of narrowness of the sampling site; The shapes of the multiple stirring wires are completely the same, and the bending direction of the bottoms thereof is the same as the rotation direction of the rotating component, so as to be used for biopsy sampling by inward contraction and rotation; The arc-shaped structure of the stirring wire includes a bottom inward contraction structure and a top outward expansion structure, the top of the top outward expansion structure is fixedly connected to the bottom of the shell, and the bottom inward contraction structure is integrally connected to the top outward expansion structure; The curvature of the bottom inwardly contracting structure is greater than the curvature of the top outwardly expanding structure.

7. The cold-bonded coring biopsy needle according to claim 6, characterized in that: The inner wall of the inner tube is provided with a cold mucus adding channel, and the position of the core needle assembly (22) corresponding to the cold mucus adding channel is provided with a cold mucus entering channel, and the cold mucus adding channel is connected to the cold mucus entering channel and is used to drive the cold mucus to the end of the core needle assembly (22); The cold adhesive adding assembly (50) comprises the cold adhesive adding channel and the cold adhesive entering channel; The cold mucus is a mixture of propane, butane, isopropanol and glycerol, and is used to vaporize quickly when the biopsy component (20) contacts the location of the tissue to be sampled, so that the sample in the tissue adheres to the end of the core needle component (22) and is absorbed into the interior of the core needle component (22); A cold adhesive storage cavity is arranged on one side of the inner tube, and a plurality of micro-diaphragms are arranged in the cold adhesive storage cavity to divide the storage cavity into a plurality of independent small chambers, and each small chamber stores a certain amount of cold adhesive.

8. The cold-bonded coring biopsy needle according to claim 7, characterized in that: The rotating assembly (40) comprises a rotating motor (41), a reducer (42) and a transmission member (43); the rotating motor (41) is fixed to the top of the housing (10); the reducer (42) is fixed to the output shaft of the rotating motor (41) and is used to reduce the rotation speed of the rotating motor (41); the top of the transmission member (43) is fixedly connected to the output shaft of the reducer (42); the side wall of the transmission member (43) is arranged between the inner wall of the housing (10) and the outer wall of the biopsy assembly (20) and is used to drive the biopsy assembly (20) to rotate; The inner wall of the transmission member (43) is provided with threads, and the threads on the outer wall of the housing (10) are adapted to each other, so as to drive the biopsy component (20) to rotate via the threads.

9. The cold-bonded coring biopsy needle according to claim 8, characterized in that: A control switch is provided on the top of the housing (10), the control switch comprising two parts, namely a closed loop component and a pressing component, the closed loop component is fixed inside the pressing component, and the rotating motor (41), the power supply and the closed loop component are connected via a wire; The pressing component is made of flexible rubber material.

10. The cold-bonded coring biopsy needle according to claim 9, characterized in that: The closed-loop component is a pressure ceramic, and the current generated by the pressure ceramic when pressed is used to close the loop between the rotating motor (41), the power source and the closed-loop component; A comparator is arranged between the pressure ceramic and the power supply, and a threshold is arranged in the comparator.

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