Biopsy needle and biopsy sampling device

Abstract

The utility model discloses a biopsy needle and biopsy sampling device relates to medical instrument technical field, wherein, biopsy needle includes: support seat, knife pipe subassembly, wear in support seat, is used for connecting drive handle, puncture head, is located the one end of knife pipe subassembly away from drive handle and is insulated with knife pipe subassembly Setting, and conductive component, be located support seat and / or knife pipe subassembly, with knife pipe subassembly insulated setting and with puncture head electric connection, for puncture head access energy transmission circuit, to make energy transmission circuit transmission's energy can at least partially through puncture head and the electrode pair of knife pipe subassembly constitute and act on target tissue. The utility model provides technical scheme has reduced the bleeding amount in biopsy sampling operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a biopsy needle and a biopsy sampling device. Background Technology

[0002] Biopsy sampling devices are used to remove tissue samples from a patient for pathological examination, and are commonly used for biopsies of the breast, thyroid, and other sites.

[0003] A biopsy sampling device is available, comprising a biopsy needle, a drive handle, and an aspiration assembly. The biopsy needle includes an outer blade and an inner blade fitted inside the outer blade. The front end of the outer blade has a slender and sharp puncture head, and a sampling window is provided on the side wall of the outer blade. After the puncture head is inserted into the tissue to reach the lesion site, the drive handle drives the inner blade to move axially and rotate circumferentially, so that the inner blade cuts off the tissue at the sampling window. Then, the aspiration assembly aspirates the cut tissue from the inside of the inner blade, thus realizing the sampling operation.

[0004] However, when the puncture head penetrates into the tissue, it often cuts blood vessels within the tissue, leading to significant intraoperative bleeding. Utility Model Content

[0005] The main purpose of this invention is to provide a biopsy needle and a biopsy sampling device, which aims to reduce the amount of bleeding during biopsy sampling surgery.

[0006] To achieve the above objectives, the biopsy needle proposed in this utility model includes:

[0007] Support base;

[0008] A blade assembly is inserted through the support base and is used to connect the drive handle;

[0009] A puncture head is disposed at the end of the blade assembly away from the drive handle and is insulated from the blade assembly; and

[0010] A conductive component, disposed on the support base and / or the blade assembly, is insulated from the blade assembly and electrically connected to the puncture head, for connecting the puncture head to an energy transmission circuit, so that the energy transmitted by the energy transmission circuit can at least partially act on the target tissue through the electrode pair formed by the puncture head and the blade assembly.

[0011] In one embodiment, the knife tube assembly includes:

[0012] An external blade tube has a first end and a second end, the first end of which passes through the support base, and the second end extends to the outside of the support base and is provided with the puncture head. The external blade tube is provided with a first channel and a sampling window communicating with the first channel.

[0013] An inner blade tube is inserted inside the first channel and is used for transmission connection with the drive handle. The end of the inner blade tube near the puncture head is provided with a cutting edge. The inner blade tube can move axially and / or rotate relative to the sampling window so as to cut the tissue that enters the first channel through the sampling window by the cutting edge.

[0014] The outer wall of the outer blade tube is provided with a conductive area and an insulating area. The sampling window is located in the insulating area, and part or all of the conductive area is used to form one electrode of the electrode pair.

[0015] In one embodiment, the conductive region includes a first sub-region and a second sub-region that are electrically connected. The first sub-region is located outside the support base, and the second sub-region is located inside the support base. The first sub-region is used to form one electrode in the electrode pair, and the second sub-region is located in the energy transmission circuit.

[0016] In one embodiment, the surface area of ​​the first sub-region is greater than the surface area of ​​the puncture head.

[0017] In one embodiment, the biopsy needle further includes a first electrode, which passes through the support base, with one end of the first electrode abutting the second sub-region and the other end of the first electrode used to dock with the first docking electrode of the drive handle.

[0018] In one embodiment, the conductive component includes:

[0019] A second electrode is inserted through the support base, and one end of the second electrode is used to connect with the second docking electrode of the drive handle; and

[0020] A wire connects the other end of the second electrode to the puncture head.

[0021] In one embodiment, the outer blade tube is further provided with a second channel separated from the first channel, and the wire passes through the interior of the second channel.

[0022] In one embodiment, the inner diameter of the first channel is larger than the inner diameter of the second channel.

[0023] In one embodiment, the blade assembly further includes an insulating layer that wraps around the outer wall of the outer blade to form the insulating region.

[0024] In one embodiment, the biopsy needle further includes an insulating structure disposed at the end of the second end of the outer blade tube, and the puncture head is fixed to the side of the insulating structure opposite to the outer blade tube; or,

[0025] The puncture head includes an integrally formed conductive needle tip and an insulating part. The insulating part is connected to the end of the second end of the outer knife tube, and the conductive needle tip is located on the side of the insulating part away from the outer knife tube.

[0026] This utility model also proposes a biopsy sampling device, comprising:

[0027] The aforementioned biopsy needle;

[0028] A drive handle is driven and connected to the biopsy needle. The drive handle has a second mating electrode electrically connected to the conductive component and a first mating electrode electrically connected to the blade assembly.

[0029] A high-frequency generator is used to generate high-frequency current and is electrically connected to the first docking electrode and the second docking electrode, respectively.

[0030] The biopsy needle in this invention includes a support base, a blade assembly, a puncture head, and a conductive component. The support base is used to fix and support the blade assembly. The puncture head is located at the front end of the blade assembly and is insulated from it. The conductive component is electrically connected to the puncture head. During tissue sampling, the conductive component, puncture head, and blade assembly are all located in an energy transmission circuit that transmits high-frequency current. The puncture head and blade assembly constitute an electrode pair acting on the target tissue. When the high-frequency current flows in the forward direction, it is transmitted to the puncture head through the conductive component, then released from the puncture head to the target tissue, passes through the target tissue, and is received by the blade assembly. When the high-frequency current flows in the reverse direction, it is released to the target tissue through the blade assembly, passes through the target tissue, is received by the puncture head, and is then transmitted to the conductive component. During this high-frequency current transmission process, heat is concentrated at the puncture tip. The thermal effect dehydrates the tissue cells around the puncture tip, thereby enabling the puncture tip to have an electrocoagulation function. This accelerates the coagulation of the tissue around the puncture tip, thereby reducing the amount of bleeding during the biopsy and improving the safety of the biopsy. In addition, the reduced bleeding provides the user with a clearer surgical field, which helps the user to identify the lesion site and remove the tissue, thus shortening the time required for the operation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 A cross-sectional view of a partial structure of an embodiment of the biopsy sampling device provided by this utility model. Figure 1 ;

[0033] Figure 2 A cross-sectional view of a partial structure of an embodiment of the biopsy sampling device provided by this utility model. Figure 2 ;

[0034] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0035] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0036] Figure 5 Schematic diagram of the structure of the outer blade of the biopsy needle blade assembly provided by this utility model Figure 1 ;

[0037] Figure 6 Schematic diagram of the structure of the outer blade of the biopsy needle blade assembly provided by this utility model Figure 2 ;

[0038] Figure 7 This is a schematic diagram of an embodiment of the biopsy sampling device provided by this utility model.

[0039] Explanation of icon numbers:

[0040] 100. Support base;

[0041] 200. Blade tube assembly; 210. Outer blade tube; 211. Sampling window; 212. Conductive area; 2121. First sub-region; 2122. Second sub-region; 213. Insulating area; 214. First channel; 215. Second channel; 220. Inner blade tube;

[0042] 300. Piercing head;

[0043] 400. Conductive component; 410. Second electrode; 420. Wire;

[0044] 500, First electrode;

[0045] 600. Insulation structure;

[0046] 10. Drive handle; 11. First docking electrode; 12. Second docking electrode.

[0047] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0049] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation" should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, or a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0052] This invention proposes a biopsy needle.

[0053] Please see Figures 1 to 2 , Figure 1 A cross-sectional view of a partial structure of an embodiment of the biopsy sampling device provided by this utility model. Figure 1 , Figure 2 A cross-sectional view of a partial structure of an embodiment of the biopsy sampling device provided by this utility model. Figure 2 .

[0054] In one embodiment of this utility model, the biopsy needle includes:

[0055] Support base 100;

[0056] The blade assembly 200 passes through the support base 100 and is used to connect the drive handle 10;

[0057] A puncture head 300 is disposed at the end of the blade assembly 200 away from the drive handle 10 and is insulated from the blade assembly 200; and

[0058] A conductive component 400 is disposed on the support base 100 and / or the blade assembly 200, is insulated from the blade assembly 200 and electrically connected to the puncture head 300, and is used to connect the puncture head 300 to the energy transmission circuit so that the energy transmitted by the energy transmission circuit can act on the target tissue at least partially through the electrode pair formed by the puncture head 300 and the blade assembly 200.

[0059] The biopsy needle in this invention includes a support base 100, a blade assembly 200, a puncture head 300, and a conductive component 400. The support base 100 is used to fix and support the blade assembly 200. The puncture head 300 is disposed at the front end of the blade assembly 200 and is insulated from the blade assembly 200. The conductive component 400 is electrically connected to the puncture head 300. During tissue sampling, the conductive component 400, the puncture head 300, and the blade assembly 200 are all located in the energy transmission circuit for transmitting current. The puncture head 300 and the blade assembly 200 constitute an electrode pair acting on the target tissue. When the current flows in the forward direction, the current is transmitted through the conductive component 400 to the puncture head 300, and then released from the puncture head 300 to the target tissue. After passing through the target tissue, it is received by the blade assembly 200. When the current flows in the reverse direction, the current is released through the blade assembly 200 to the target tissue, and after passing through the target tissue, it is received by the puncture head 300 and then transmitted to the conductive component 400.

[0060] For ease of understanding, let's take high-frequency current as an example, which is the energy transmitted by the energy transmission circuit. During this high-frequency current transmission process, heat is concentrated at the puncture head 300. Through the thermal effect, the tissue cells around the puncture head 300 are dehydrated, thereby enabling the puncture head 300 to have an electrocoagulation function. This accelerates the coagulation of the tissue around the puncture head 300, thereby reducing the amount of bleeding in the biopsy sampling procedure and improving the safety of the biopsy sampling procedure. In addition, the reduction in bleeding also provides the user with a clearer surgical field, which helps the user to identify the lesion site and remove the tissue, thereby shortening the time required for the operation.

[0061] The target tissue refers to the tissue to be sampled by the biopsy needle, such as breast tissue or thyroid tissue. The conductive component 400 can be mounted on the support base 100 or on the tube assembly 200. Insulation is provided between the puncture head 300 and the tube assembly 200 to ensure that the puncture head 300 does not make electrical contact with the tube assembly 200, thereby preventing high-frequency current from directly flowing back through the tube assembly 200 and ensuring the correct path of the high-frequency current and the electrocoagulation effect.

[0062] In one embodiment, the knife tube assembly 200 includes:

[0063] The outer blade tube 210 has a first end and a second end, the first end is inserted through the support base 100, and the second end extends to the outside of the support base 100 and is provided with a puncture head 300. The outer blade tube 210 is provided with a first channel 214 and a sampling window 211 communicating with the first channel 214.

[0064] The inner blade tube 220 is inserted inside the first channel 214 and is used to drive the drive handle 10. The end of the inner blade tube 220 near the puncture head 300 is provided with a cutting blade. The inner blade tube 220 can move axially and / or rotate relative to the sampling window 211 to cut the tissue that enters the first channel 214 through the sampling window 211 by the cutting blade.

[0065] The outer wall of the outer blade tube 210 is provided with a conductive region 212 and an insulating region 213. The sampling window 211 is located in the insulating region 213. The first sub-region 2121 is used to form one electrode in the electrode pair. The second sub-region 2122 is located in the energy transmission circuit.

[0066] Reference Figure 2 , Figure 4 , Figure 5 as well as Figure 6 In an embodiment of this utility model, the blade assembly 200 includes an outer blade 210 and an inner blade 220. The inner blade 220 performs a combination of axial and rotational movements within the first channel 214 of the outer blade 210, cutting off the tissue at the sampling window 211 to achieve the sampling function. The outer blade 210 has a conductive region 212 and an insulating region 213 on its outer wall. High-frequency current returns to the conductive region 212 via the target tissue, allowing the high-frequency current to return to the outer blade 210. The sampling window 211 is located in the insulating region 213 to prevent the outer wall of the outer blade 210 around the sampling window 211 from becoming conductive, thereby preventing heat concentration around the sampling window 211 and affecting the sampling effect.

[0067] The outer blade tube 210 can be made of conductive material. An insulating region 213 is formed by coating an insulating layer or attaching an insulating film to the outer peripheral wall. The area without an insulating layer or an insulating film is the conductive region 212. The outer blade tube 210 can also be manufactured in sections using different materials and then spliced ​​together. The tube sections made of insulating material form the insulating region 213, and the tube sections made of conductive material form the conductive region 212.

[0068] In one embodiment, the conductive region 212 includes a first sub-region 2121 and a second sub-region 2122 that are electrically connected. The first sub-region 2121 is located outside the support base 100, and the second sub-region 2122 is located inside the support base 100. The first sub-region 2121 is used to form one electrode in an electrode pair, and the second sub-region 2122 is located in an energy transmission circuit.

[0069] Reference Figure 2 , Figure 4 as well as Figure 6 In an embodiment of this utility model, the conductive region 212 includes a first sub-region 2121 and a second sub-region 2122. When the puncture head 300 penetrates the tissue, the first sub-region 2121 directly contacts the target tissue, so that the puncture head 300 and the first sub-region 2121 constitute an electrode pair acting on the target tissue. When the high-frequency current flows in the forward direction, the high-frequency current is transmitted to the puncture head 300 through the wire 420, and then released from the puncture head 300 to the target tissue. After passing through the target tissue, it is received by the first sub-region 2121 on the outer blade tube 210. When the high-frequency current flows in the reverse direction, the high-frequency current is released to the target tissue through the first sub-region 2121 on the outer blade tube 210, and after passing through the target tissue, it is received by the puncture head 300 and then transmitted to the wire 420. The first sub-region 2121 and the second sub-region 2122 are electrically connected. The second sub-region 2122 is also located in the energy transmission circuit. In the aforementioned case of forward flow of high-frequency current, the high-frequency current received by the first sub-region 2121 will be transferred to the second sub-region 2122. In the aforementioned case of reverse flow of high-frequency current, the high-frequency current released by the first sub-region 2121 comes from the second sub-region 2122. The high-frequency current is transmitted from the outer blade tube 210 itself through the first sub-region 2121 to the second sub-region 2122. The second sub-region 2122 is located inside the support base 100, which facilitates docking with the first electrode 500 of the biopsy needle or directly docking with the drive handle 10, so as to realize the transmission of high-frequency current from the biopsy needle to the drive handle 10.

[0070] In one embodiment, the surface area of ​​the first sub-region 2121 is greater than the surface area of ​​the puncture head 300.

[0071] In the embodiments of this utility model, the surface area of ​​the first sub-region 2121 is larger than the surface area of ​​the puncture head 300. The larger surface area of ​​the first sub-region 2121 and the smaller surface area of ​​the puncture head 300 result in the most concentrated high-frequency current in the circuit at the puncture head 300, making it easier to generate concentrated heat at the puncture head 300. This improves the electrocoagulation effect of the puncture head 300 and further reduces surgical bleeding. At the same time, the outer wall of the outer knife tube 210 is less prone to heat concentration, preventing the outer knife tube 210 from burning the surrounding tissue after puncturing into the tissue.

[0072] In one embodiment, the biopsy needle further includes a first electrode 500, which is disposed in the support base 100. One end of the first electrode 500 abuts against the second sub-region 2122, and the other end of the first electrode 500 is used to dock with the first docking electrode 11 of the drive handle 10.

[0073] Reference Figure 2 , Figure 4 as well as Figure 6 In this embodiment of the invention, the biopsy needle further includes a first electrode 500. One end of the first electrode 500 abuts against the second sub-region 2122, and the other end of the first electrode 500 is connected to the first docking electrode 11 of the drive handle 10. Energy is transferred between the outer blade tube 210 and the drive handle 10 through the first electrode 500. The first electrode 500 facilitates docking with the first docking electrode 11 of the drive handle 10, reducing disassembly and assembly operations. Specifically, in this embodiment, the first electrode 500 uses a bidirectional spring contact, and both ends of the first electrode 500 can elastically extend and retract, ensuring a tight connection between the first electrode 500 and the outer blade tube 210 and the first docking electrode 11.

[0074] In one embodiment, the conductive component 400 includes:

[0075] The second electrode 410 is disposed in the support base 100, and one end of the second electrode 410 is used to connect with the second docking electrode 12 of the drive handle 10; and

[0076] The lead wire 420 connects the other end of the second electrode 410 to the puncture head 300.

[0077] Reference Figures 2 to 3In this embodiment of the invention, the conductive component 400 includes a second electrode 410 and a wire 420. The second electrode 410 is connected to the second docking electrode 12 on the drive handle 10, and energy is transferred between the puncture head 300 and the drive handle 10 through the second electrode 410 and the wire 420. Since the biopsy needle is generally for single use, while the drive handle 10 can be reused, the connection between the biopsy needle and the drive handle 10 is generally detachable. The second electrode 410 facilitates docking with the second docking electrode 12 of the drive handle 10, reducing disassembly and assembly operations. Furthermore, the structure of the second electrode 410 and the wire 420 is relatively simple, making it easy to inspect, replace, and maintain. Specifically, in this embodiment, the second electrode 410 uses a one-way spring contact, and the end that docks with the second docking electrode 12 can elastically extend and retract, ensuring a tight connection between the second electrode 410 and the second docking electrode 12.

[0078] It should be noted that, of the first electrode 500 and the second electrode 410, one electrode is connected to the second docking electrode 12, and the other electrode is connected to the first docking electrode 11. Figures 2 to 3 In the corresponding implementation, the first electrode 500 is connected to the first docking electrode 11, and the second electrode 410 is connected to the second docking electrode 12. In actual implementation, the first docking electrode 11 and the second docking electrode 12 can also be interchanged due to changes in the current direction.

[0079] In one embodiment, the outer blade tube 210 is further provided with a second channel 215 that is separated from the first channel 214, and the wire 420 passes through the interior of the second channel 215.

[0080] Reference Figure 2 and Figure 5 In an embodiment of this utility model, the outer blade tube 210 is provided with a first channel 214 and a second channel 215 that are separated from each other. The wire 420 passes through the interior of the second channel 215 that is separated from the first channel 214, so that the outer blade tube 210 provides a certain degree of protection for the wire 420, reducing the possibility of the wire 420 being hooked and damaged, preventing the wire 420 from affecting the movement of the inner blade tube 220 in the first channel 214, and preventing the wire 420 from contaminating the surgical environment, thereby improving the safety of the surgery.

[0081] In one embodiment, the inner diameter of the first channel 214 is larger than the inner diameter of the second channel 215.

[0082] Reference Figure 5In this embodiment of the present invention, the inner diameter of the first channel 214 is larger than the inner diameter of the second channel 215, which facilitates the setting of the inner blade tube 220 for cutting tissue in the first channel 214 with a larger inner diameter. The second channel 215 only needs to accommodate the wire 420, so the inner diameter of the second channel 215 is set to be smaller, which is beneficial to reduce the outer diameter of the entire outer blade tube 210, thereby reducing the size of the wound caused to the tissue and improving the safety of the operation.

[0083] In one embodiment, the blade assembly 200 further includes an insulating layer that wraps around the outer wall of the outer blade 210 to form an insulating region 213.

[0084] In this embodiment of the invention, the outer blade tube 210 is made entirely of conductive material, and the outer wall of the outer blade tube 210 is covered with an insulating layer formed of insulating material. The area with the insulating layer is the insulating area 213. The structure is simple, easy to manufacture, and helps to reduce production costs. The insulating layer can be a coating formed by spraying or a film-like material that is pasted on. The insulating material can be polyimide, polytetrafluoroethylene, etc.

[0085] In one embodiment, the biopsy needle further includes an insulating structure 600, which is disposed at the end of the second end of the outer blade tube 210, and the puncture head 300 is fixed to the side of the insulating structure 600 opposite to the outer blade tube 210; or,

[0086] The puncture head 300 includes an integrally formed conductive needle tip and an insulating part. The insulating part is connected to the end of the second end of the outer knife tube 210, and the conductive needle tip is located on the side of the insulating part away from the outer knife tube 210.

[0087] Reference Figure 3 In one embodiment of this invention, an insulating structure 600 is provided between the outer blade tube 210 and the puncture head 300. By providing the insulating structure 600 to separate the puncture head 300 and the outer blade tube 210, current cannot be directly transmitted between the puncture head 300 and the outer blade tube 210, ensuring that the current flows along a predetermined path, thereby improving the electrocoagulation effect of the puncture head 300. In another embodiment, the puncture head 300 includes an integrally formed conductive needle tip and an insulating part. A wire 420 connects the second electrode 410 and the conductive needle tip. The insulating part separates the conductive needle tip and the outer blade tube 210, ensuring that current cannot be directly transmitted between the conductive needle tip and the outer blade tube 210, ensuring that the current flows along a predetermined path, thereby improving the electrocoagulation effect of the puncture head 300.

[0088] Reference Figure 7 This utility model also proposes a biopsy sampling device, comprising:

[0089] The aforementioned biopsy needle;

[0090] Drive handle 10, drives the biopsy needle, drive handle 10 has a second docking electrode 12 electrically connected to conductive component 400 and a first docking electrode 11 electrically connected to knife tube assembly 200; and

[0091] A high-frequency generator is used to generate high-frequency current and is electrically connected to the first docking electrode 11 and the second docking electrode 12, respectively.

[0092] The specific structure of the biopsy needle is as described in the above embodiments. Since this biopsy sampling device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0093] The complete energy transmission circuit includes a high-frequency generator, a first docking electrode 11 and a second docking electrode 12 on the drive handle 10, a first electrode 500, an outer blade tube 210, a puncture head 300, a lead wire 420, a second electrode 410 on the biopsy needle, and the target tissue. Taking the aforementioned forward flow of high-frequency current as an example, during sampling, the high-frequency current generated by the high-frequency generator is transmitted to the second docking electrode 12 of the drive handle 10, then to the second electrode 410 of the biopsy needle, and then to the puncture head 300 through the lead wire 420. The puncture head 300 releases the high-frequency current to the surrounding tissue to achieve electrocoagulation and reduce surgical bleeding. Then, the high-frequency current returns to the first sub-region 2121 on the outer blade tube 210 through the tissue, then to the second sub-region 2122 through the tube body of the outer blade tube 210, then to the first docking electrode 11 of the drive handle 10 through the first electrode 500, and finally back to the high-frequency generator from the first docking electrode 11, forming a complete current circuit.

[0094] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A biopsy needle, characterized in that, include: Support base; A blade assembly is inserted through the support base and is used to connect the drive handle; A puncture head is disposed at the end of the blade assembly away from the drive handle and is insulated from the blade assembly; and A conductive component, disposed on the support base and / or the blade assembly, is insulated from the blade assembly and electrically connected to the puncture head, for connecting the puncture head to an energy transmission circuit, so that the energy transmitted by the energy transmission circuit can at least partially act on the target tissue through the electrode pair formed by the puncture head and the blade assembly.

2. The biopsy needle as described in claim 1, characterized in that, The blade assembly includes: An external blade tube has a first end and a second end, the first end of which passes through the support base, and the second end extends to the outside of the support base and is provided with the puncture head. The external blade tube is provided with a first channel and a sampling window communicating with the first channel. An inner blade tube is inserted inside the first channel and is used for transmission connection with the drive handle. The end of the inner blade tube near the puncture head is provided with a cutting edge. The inner blade tube can move axially and / or rotate relative to the sampling window so as to cut the tissue that enters the first channel through the sampling window by the cutting edge. The outer wall of the outer blade tube is provided with a conductive area and an insulating area. The sampling window is located in the insulating area, and part or all of the conductive area is used to form one electrode of the electrode pair.

3. The biopsy needle as described in claim 2, characterized in that, The conductive region includes a first sub-region and a second sub-region that are electrically connected. The first sub-region is located outside the support base, and the second sub-region is located inside the support base. The first sub-region is used to form one electrode in the electrode pair, and the second sub-region is located in the energy transmission circuit.

4. The biopsy needle as described in claim 3, characterized in that, The surface area of ​​the first sub-region is greater than the surface area of ​​the puncture head.

5. The biopsy needle as described in claim 3, characterized in that, The biopsy needle also includes a first electrode, which passes through the support base. One end of the first electrode abuts against the second sub-region, and the other end of the first electrode is used to dock with the first docking electrode of the drive handle.

6. The biopsy needle as described in claim 2, characterized in that, The conductive component includes: A second electrode is inserted through the support base, and one end of the second electrode is used to connect with the second docking electrode of the drive handle; and A wire connects the other end of the second electrode to the puncture head.

7. The biopsy needle as described in claim 6, characterized in that, The outer blade tube is also provided with a second channel that is separated from the first channel, and the wire passes through the interior of the second channel.

8. The biopsy needle as described in claim 7, characterized in that, The inner diameter of the first channel is larger than the inner diameter of the second channel.

9. The biopsy needle as described in claim 2, characterized in that, The blade assembly also includes an insulating layer that wraps around the outer wall of the outer blade to form the insulating region.

10. The biopsy needle according to any one of claims 2 to 9, characterized in that, The biopsy needle further includes an insulating structure located at the end of the second end of the outer blade tube, and the puncture head is fixed to the side of the insulating structure opposite to the outer blade tube; or, The puncture head includes an integrally formed conductive needle tip and an insulating part. The insulating part is connected to the end of the second end of the outer knife tube, and the conductive needle tip is located on the side of the insulating part away from the outer knife tube.

11. A biopsy sampling device, characterized in that, include: The biopsy needle as described in any one of claims 1 to 10; A drive handle is driven to connect to the biopsy needle. The drive handle has a second docking electrode electrically connected to the conductive component and a first docking electrode electrically connected to the blade assembly. as well as A high-frequency generator is used to generate high-frequency current and is electrically connected to the first docking electrode and the second docking electrode, respectively.

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