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: casing assembly, knife pipe subassembly, wear in casing assembly, is used for connecting drive handle, electrode subassembly, including at least two polarity opposite electrodes, and electrode subassembly is located in casing assembly and is connected with knife pipe subassembly electricity, and electrode subassembly is used for the butt joint electrode group of butt joint drive handle, to form the energy transmission circuit that can transmit energy from drive handle to knife pipe subassembly, wherein, at least one in electrode subassembly is spring needle connector, and the end of spring needle connector towards drive handle can elastically extend and retract. The utility model provides technical scheme to improve the stability that biopsy needle and drive handle are electrically connected.

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] Existing biopsy devices generally include a drive handle and a biopsy needle. The biopsy needle is used to cut and obtain tissue samples. The biopsy needle is mounted on the drive handle, which drives the inner blade of the biopsy needle to perform rotary cutting of the tissue. Electrodes are provided in both the handle and the biopsy needle. When the biopsy needle is assembled onto the handle, the mating electrodes between the two establish an electrical connection between the drive handle and the biopsy needle.

[0004] Poor electrode contact is common between the existing drive handle and the biopsy needle, affecting the stability of the electrical connection between the drive handle and the biopsy needle. Utility Model Content

[0005] The main purpose of this invention is to provide a biopsy needle and a biopsy sampling device, which aims to improve the stability of the electrical connection between the biopsy needle and the drive handle.

[0006] To achieve the above objectives, the biopsy needle proposed in this utility model includes: Housing assembly; A blade assembly, passing through the housing assembly, is used to connect to the drive handle; An electrode assembly includes at least two electrodes of opposite polarity. The electrode assembly is disposed on the housing assembly and electrically connected to the blade assembly. The electrode assembly is used to dock with the docking electrode group of the drive handle to form an energy transmission circuit that transfers energy from the drive handle to the blade assembly. At least one of the electrode assemblies is a spring pin connector, and the spring pin connector is elastically extendable toward the end of the drive handle.

[0007] In one embodiment, the knife tube assembly includes: An outer blade tube has a first end and a second end opposite to each other, the second end extending into the housing assembly, and the outer blade tube is provided with a first channel and a sampling window communicating with the first channel; A puncture head is located at the first end of the outer knife tube; 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 first end is provided with a cutting blade. The inner blade tube can move axially and / or rotate relative to the sampling window to cut the tissue that enters the first channel through the sampling window by the cutting blade. The puncture head is insulated from both the outer blade tube and the inner blade tube. The electrode assembly includes a first electrode and a second electrode disposed on the housing assembly. The first electrode is electrically connected to the outer blade tube, and the second electrode is electrically connected to the puncture head.

[0008] In one embodiment, the knife tube assembly includes: An outer blade tube has a first end and a second end opposite to each other, the second end extending into the housing assembly, and the outer blade tube is provided with a first channel and a sampling window communicating with the first channel; An inner blade tube, inserted inside the first channel, is used for transmission connection with the drive handle. One end of the inner blade tube near the puncture head is provided with a cutting edge. The inner blade tube is capable of axial movement and / or rotational movement relative to the sampling window, so as to cut tissue entering the first channel through the sampling window using the cutting edge. The puncture head is located at the first end of the outer knife tube and is insulated from both the outer knife tube and the inner knife tube; The electrode assembly includes a first electrode and a second electrode disposed on the housing assembly. The first electrode is connected to the outer blade tube, and the second electrode is connected to the inner blade tube; or both the first electrode and the second electrode are electrically connected to the puncture head.

[0009] In one embodiment, at least one electrode in the electrode assembly has elastically extendable first ends at both ends, one of the first ends abutting against the outer wall of the blade tube assembly, and the other of the first ends being used to dock with an electrode in the docking electrode group.

[0010] In one embodiment, the biopsy needle further includes a lead wire, and at least one electrode in the electrode assembly has a resiliently extendable second end for engaging with an electrode in the docking electrode group, and the other end is electrically connected to the puncture head via the lead wire.

[0011] In one embodiment, the housing assembly includes: The outer casing; and A support base is fixed to the front end of the housing. The blade tube assembly passes through the support base along the axial direction of the support base, and each electrode of the electrode assembly passes through the support base along the radial direction of the support base.

[0012] In one embodiment, the end of the support base opposite to the puncture head is provided with a mounting groove, the mounting groove connecting the inside and outside of the support base, and each electrode of the electrode assembly passes through the mounting groove.

[0013] In one embodiment, each electrode in the electrode assembly has a limiting portion protruding from its outer wall, the limiting portion being used to prevent the corresponding electrode from dislodging from the mounting groove along the radial direction of the support.

[0014] In one embodiment, each electrode in the electrode assembly is bonded and / or snapped to the inner wall of the mounting groove.

[0015] This utility model also proposes a biopsy sampling device, comprising: The aforementioned biopsy needle; A drive handle is connected to the biopsy needle, and the drive handle has a docking electrode assembly; and A high-frequency generator is used to generate high-frequency current and is electrically connected to each electrode in the docking electrode group.

[0016] The biopsy needle in this utility model includes a housing assembly, a blade assembly, and an electrode assembly. The housing assembly is used to fix and support the blade assembly. The electrode assembly includes two or more electrodes and is used to dock with the docking electrode group on the drive handle. The electrodes in the electrode assembly and the electrodes in the docking electrode group can be docked in a one-to-one, one-to-many, or many-to-one manner. At least two electrodes with opposite polarities exist in the electrode assembly, which are used to receive and return energy from the drive handle, respectively, so that the electrical signal can be transmitted from the electrode in the docking electrode group to the electrode in the electrode assembly, then to the blade assembly, then to the electrode of the other polarity in the electrode assembly, and then back to the electrode in the docking electrode group. At least one of the electrode assemblies is a spring-loaded pin connector. When the biopsy needle is not mounted on the drive handle, the elastically extendable end of the spring-loaded pin connector is in its natural state. When the biopsy needle is mounted on the drive handle, the end of the spring-loaded pin connector is compressed and generates elastic force to tend to return to its natural state, thereby making tight contact with the docking electrode assembly on the drive handle, providing good electrical contact and stability, improving the connection reliability between the electrodes on the biopsy needle and the electrodes on the drive handle, avoiding energy loss due to poor contact, and thus improving the stability of the electrical connection between the biopsy needle and the drive handle. Attached Figure Description

[0017] 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.

[0018] Figure 1 Cross-section of an embodiment of the biopsy needle provided by this utility model Figure 1 ; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 A schematic diagram of the support base for the housing assembly of the biopsy needle provided by this utility model; Figure 4 A schematic diagram of the outer blade of the biopsy needle blade assembly provided by this utility model; Figure 5 Cross-section of an embodiment of the biopsy needle provided by this utility model Figure 2 ; Figure 6 This is a schematic diagram of an embodiment of the biopsy sampling device provided by this utility model.

[0019] Explanation of icon numbers: 100. Housing assembly; 110. Housing; 120. Support base; 121. Mounting slot; 200. Blade assembly; 210. Outer blade; 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; 230. Puncture head; 300, Electrode assembly; 310, First electrode; 311, First end; 312, First limiting part; 320, Second electrode; 321, Second end; 322, Second limiting part; 400. Wire; 500, drive handle; 510, docking electrode assembly; 511, first docking electrode; 512, second docking electrode.

[0020] 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

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] This invention proposes a biopsy needle.

[0026] Please see Figure 1 , Figure 2 and Figure 5 , Figure 1 Cross-section of an embodiment of the biopsy needle provided by this utility model Figure 1 , Figure 2 for Figure 1 A magnified view of a portion of point A in the middle. Figure 5 Cross-section of an embodiment of the biopsy needle provided by this utility model Figure 2 .

[0027] In one embodiment of this utility model, the biopsy needle includes: Housing assembly 100; The blade assembly 200 passes through the housing assembly 100 and is used to connect the drive handle 500; Electrode assembly 300 includes at least two electrodes with opposite polarities. Electrode assembly 300 is disposed in housing assembly 100 and electrically connected to blade assembly 200. Electrode assembly 300 is used to dock with docking electrode group 510 of drive handle 500 to form an energy transmission circuit that transfers energy from drive handle 500 to blade assembly 200. At least one of the electrode assemblies 300 is a spring pin connector, and the spring pin connector is elastically extendable toward the end of the drive handle 500.

[0028] The biopsy needle in this utility model includes a housing assembly 100, a blade assembly 200, and an electrode assembly 300. The housing assembly 100 is used to fix and support the blade assembly 200. The electrode assembly 300 includes two or more electrodes and is used to dock with the docking electrode group 510 on the drive handle 500. The electrodes in the electrode assembly 300 and the electrodes in the docking electrode group 510 can be docked in a one-to-one, one-to-many, or many-to-one manner. At least two electrodes with opposite polarities exist in the electrode assembly 300, which are used to receive and return energy from the drive handle 500, respectively, so that the electrical signal can be transmitted from the electrode in the docking electrode group 510 to the electrode in the electrode assembly 300, then to the blade assembly 200, then to the electrode of the other polarity in the electrode assembly 300, and then back to the electrode in the docking electrode group 510. At least one of the electrode assemblies 300 is a spring-loaded pin connector. When the biopsy needle is not mounted on the drive handle 500, the elastically extendable end of the spring-loaded pin connector is in its natural state. When the biopsy needle is mounted on the drive handle 500, the end of the spring-loaded pin connector is compressed and generates elastic force to tend to return to its natural state, thereby making tight contact with the mating electrode assembly 510 on the drive handle 500, providing good electrical contact and stability, improving the connection reliability between the electrodes on the biopsy needle and the electrodes on the drive handle 500, avoiding energy loss due to poor contact, and thus improving the stability of the electrical connection between the biopsy needle and the drive handle 500.

[0029] It is worth mentioning that the "high-frequency current" in the above and below embodiments can be either a positive current or a negative current.

[0030] In one embodiment, the knife tube assembly 200 includes: The outer blade tube 210 has a first end and a second end, the second end of which extends into the housing assembly 100. The outer blade tube 210 is provided with a first channel 214 and a sampling window 211 communicating with the first channel 214. An inner blade tube 220, inserted inside the first channel 214, is used for transmission connection with the drive handle 500. The end of the inner blade tube 220 near the puncture head 230 has a cutting blade. The inner blade tube 220 can move axially and / or rotate relative to the sampling window 211 to cut tissue entering the first channel 214 through the sampling window 211 using the cutting blade. The puncture head 230 is located at the first end of the outer knife tube 210 and is insulated from both the outer knife tube 210 and the inner knife tube 220. The electrode assembly 300 includes a first electrode 310 and a second electrode 320 disposed in the housing assembly 100. The first electrode 310 is electrically connected to the outer knife tube 210, and the second electrode 320 is electrically connected to the puncture head 230.

[0031] Reference Figure 1 , Figure 4 as well as Figure 5 In an embodiment of this utility model, the blade assembly 200 includes an outer blade 210, an inner blade 220, and a puncture head 230. After the puncture head 230 penetrates the target tissue, the inner blade 220 performs a combination of axial and rotational movements within the first channel 214 of the outer blade 210 to cut off the tissue at the sampling window 211, thereby achieving the sampling function. The electrode assembly 300 includes a first electrode 310 and a second electrode 320. The first electrode 310 is electrically connected to the outer blade tube 210, and the second electrode 320 is electrically connected to the puncture head 230, such that both the outer blade tube 210 and the puncture head 230 are located in the energy transmission circuit for transmitting high-frequency current. When the high-frequency current flows in the forward direction, the high-frequency current is transmitted to the puncture head 230 through the wire 400, and then released from the puncture head 230 to the target tissue. After passing through the target tissue, it is received by 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 outer blade tube 210, and after passing through the target tissue, it is received by the puncture head 230 and then transmitted to the wire 400. During this high-frequency current transmission process, heat is concentrated at the puncture tip 230. The thermal effect causes the tissue cells around the puncture tip 230 to dehydrate, thereby enabling the puncture tip 230 to have an electrocoagulation function. This accelerates the coagulation of the tissue around the puncture tip 230, thereby reducing the amount of bleeding in the biopsy sampling procedure and improving the safety of the biopsy sampling procedure. 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, thereby shortening the time required for the operation.

[0032] In one embodiment, the knife tube assembly 200 includes: The outer blade tube 210 has a first end and a second end, the second end of which extends into the housing assembly 100. The outer blade tube 210 is provided with a first channel 214 and a sampling window 211 communicating with the first channel 214. An inner blade tube 220, inserted inside the first channel 214, is used for transmission connection with the drive handle 500. The end of the inner blade tube 220 near the puncture head 230 has a cutting blade. The inner blade tube 220 can move axially and / or rotate relative to the sampling window 211 to cut tissue entering the first channel 214 through the sampling window 211 using the cutting blade. The puncture head 230 is located at the first end of the outer knife tube 210 and is insulated from both the outer knife tube 210 and the inner knife tube 220. The electrode assembly 300 includes a first electrode 310 and a second electrode 320 disposed in the housing assembly 100. The first electrode 310 is connected to the outer blade tube 210, and the second electrode 320 is connected to the inner blade tube 220; or both the first electrode 310 and the second electrode 320 are electrically connected to the puncture head 230.

[0033] In an embodiment of this invention (not shown in the accompanying drawings), the electrode assembly 300 includes a first electrode 310 and a second electrode 320. The first electrode 310 is electrically connected to the outer blade tube 210, and the second electrode 320 is electrically connected to the inner blade tube 220. Both the outer blade tube 210 and the inner blade tube 220 are located in an energy transmission circuit for transmitting high-frequency current. When the high-frequency current flows in the forward direction, it is transmitted to the inner blade tube 220 through the wire 400, then released from the inner blade tube 220 to the target tissue, passes through the target tissue, and is then received by the outer blade tube 210. When the high-frequency current flows in the reverse direction, it is released to the target tissue through the outer blade tube 210, passes through the target tissue, is received by the inner blade tube 220, and is then transmitted to the wire 400. During this high-frequency current transmission process, heat is concentrated at the cutting edge of the inner blade tube 220. This thermal effect dehydrates the tissue cells around the cutting edge, thereby enabling the cutting edge to have an electrocoagulation function and accelerating blood clotting in the tissue around the cutting edge.

[0034] In an embodiment of this invention (not shown in the accompanying drawings), the electrode assembly 300 includes a first electrode 310 and a second electrode 320. Both the first electrode 310 and the second electrode 320 are electrically connected to the puncture head 230, such that the puncture head 230 is located in the energy transmission circuit for transmitting high-frequency current. Regardless of whether the high-frequency current flows in the forward or reverse direction, it is released to the target tissue through the puncture head 230, passes through the target tissue, and is then received by the puncture head 230. During this high-frequency current transmission process, heat is concentrated at the puncture head 230. Through the thermal effect, the tissue cells around the puncture head 230 are dehydrated, thereby enabling the puncture head 230 to have an electrocoagulation function and accelerating the coagulation of the tissue around the puncture head 230.

[0035] In one embodiment, at least one electrode in the electrode assembly 300 has elastically retractable first ends 311 at both ends, one of the first ends 311 abutting against the outer wall of the blade tube assembly 200, and the other first end 311 being used to dock with the first docking electrode 511.

[0036] Reference Figure 2 In the embodiments of this utility model, at least one electrode in the electrode assembly 300 adopts a spring pin connector with elastic extension and retraction at both ends. Specifically, in this embodiment, it is the first electrode 310. On the one hand, the first electrode 310 does not need to be wired to connect with the blade tube assembly 200. It can be electrically connected by direct contact, which improves the convenience of assembly. On the other hand, it enables the first electrode 310 to achieve more reliable and stable electrical contact whether it is contacting the blade tube assembly 200 or the first mating electrode 511.

[0037] In one embodiment, the biopsy needle further includes a lead wire 400, and at least one end of the electrode assembly 300 has a resiliently extendable second end 321 for engaging with an electrode in the electrode assembly 510, and the other end is electrically connected to the puncture head 230 via the lead wire 400.

[0038] Reference Figure 2 In an embodiment of this utility model, at least one electrode in the electrode assembly 300 adopts a single-headed elastically retractable spring needle connector. Specifically, in this embodiment, it is the second electrode 320. The second end 321 of the second electrode 320 facing the drive handle 500 is elastically retractable. The other end of the second electrode 320 is not directly connected to the puncture head 230, but is connected through the wire 400, which makes the arrangement of the second electrode 320 more flexible and the internal component layout of the biopsy needle more compact and reasonable.

[0039] In one embodiment, the housing assembly 100 includes: Casing 110; and The support base 120 is fixed to the front end of the housing 110. The blade assembly 200 passes through the support base 120 along the axial direction. Each electrode of the electrode assembly 300 passes through the support base 120 along the radial direction.

[0040] Reference Figures 1 to 2In an embodiment of this utility model, the housing assembly 100 includes a housing 110 and a support base 120. The support base 120 is fixed to the front end of the housing 110. The first electrode 310 and the second electrode 320 are radially disposed within the support base 120. The presence of the support base 120 provides a positioning reference for the blade assembly 200, the first electrode 310, and the second electrode 320, facilitating the docking of the blade assembly 200 and the first electrode 310. During the assembly of the biopsy needle, the smaller first electrode 310 and the second electrode 320 are first assembled onto the support base 120, and then the support base 120 is installed onto the housing 110. This achieves the installation of the first electrode 310 and the second electrode 320, making the assembly operation of the first electrode 310 and the second electrode 320 more convenient. The first electrode 310 and the second electrode 320 are both radially inserted into the support base 120. When they are connected to the docking electrode group 510 on the drive handle 500, they are less likely to be skewed or shaken, which helps to further improve the stability of the electrical connection between the biopsy needle and the drive handle 500.

[0041] In one embodiment, the end of the support base 120 opposite to the puncture head 230 is provided with a mounting groove 121, which connects the inside and outside of the support base 120, and each electrode of the electrode assembly 300 passes through the mounting groove 121.

[0042] Combination Figure 1 and Figure 3 In an embodiment of this utility model, the support base 120 is provided with an installation groove 121, and the first electrode 310 and the second electrode 320 are both installed in the installation groove 121. The installation of the two electrodes in one groove simplifies the installation structure of the two electrodes and reduces the processing steps of the support base 120.

[0043] In one embodiment, each electrode in the electrode assembly 300 has a limiting portion protruding from its outer wall. The limiting portion is used to prevent the corresponding electrode from being dislodged from the mounting groove 121 along the radial direction of the support base 120.

[0044] Reference Figure 2In an embodiment of this utility model, each electrode in the electrode assembly 300 has a protruding limiting portion on its outer wall. Specifically, the outer wall of the first electrode 310 has a protruding first limiting portion 312, and the outer wall of the second electrode 320 has a protruding second limiting portion 322. The first limiting portion 312 prevents the first electrode 310 from moving radially outward from the support base 120, preventing the first electrode 310 from falling out of the mounting groove 121, thus improving the firmness of the first electrode 310 mounted on the support base 120, thereby ensuring the reliability of the electrical connection between the biopsy needle and the drive handle 500. The second limiting portion 322 prevents the second electrode 320 from moving radially outward from the support base 120, preventing the second electrode 320 from falling out of the mounting groove 121, thus improving the firmness of the second electrode 320 mounted on the support base 120, thereby improving the reliability of the electrical connection between the biopsy needle and the drive handle 500.

[0045] In one embodiment, each electrode in the electrode assembly 300 is bonded and / or snapped to the inner wall of the mounting groove 121.

[0046] In the embodiments of this utility model, the first electrode 310 can be fixed in the mounting groove 121 by adhesive injection or by snap-fitting with buckles, snap holes or other snap-fitting methods that cooperate with the support base 120, thereby improving the firmness of the first electrode 310 mounted on the support base 120 and thus improving the reliability of the electrical connection between the biopsy needle and the drive handle 500.

[0047] In the embodiments of this utility model, the second electrode 320 can be fixed in the mounting groove 121 by adhesive injection or by snap-fitting with buckles, snap holes or other snap-fitting methods that cooperate with the support base 120, thereby further improving the firmness of the first electrode 310 mounted on the support base 120 and thus improving the reliability of the electrical connection between the biopsy needle and the drive handle 500.

[0048] Combination Figure 1 , Figure 2 and Figure 4 In one embodiment, a conductive region 212 and an insulating region 213 are provided on the outer wall of the outer blade tube 210. Taking the aforementioned forward flow of high-frequency current as an example, the high-frequency current returns to the conductive region 212 through the target tissue, causing the high-frequency current to return to the outer blade tube 210, and then from the conductive region 212 through the first electrode 310 back to the first docking electrode 511 of the drive handle 500. The sampling window 211 is located in the insulating region 213 to prevent the outer wall of the outer blade tube 210 around the sampling window 211 from becoming conductive, thereby preventing heat concentration around the sampling window 211 and affecting the sampling effect.

[0049] 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.

[0050] 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 120, and the second sub-region 2122 is located inside the support base 120. The first electrode 310 abuts against the second sub-region 2122.

[0051] Reference Figure 4 In an embodiment of this utility model, the conductive region 212 includes a first sub-region 2121 and a second sub-region 2122. Taking the aforementioned forward flow of high-frequency current as an example, when the puncture head 230 penetrates the tissue, the first sub-region 2121 directly contacts the target tissue, so that the high-frequency current released by the puncture head 230 is transmitted through the tissue to the first sub-region 2121, and then returns to the outer blade tube 210. Then, the high-frequency current is transmitted from the first sub-region 2121 to the second sub-region 2122 along the outer blade tube 210 itself. The second sub-region 2122 is located in the support base 120, which facilitates docking with the first electrode 310 of the biopsy needle, and then transmits the high-frequency current to the drive handle 500.

[0052] 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 400 passes through the interior of the second channel 215.

[0053] Reference Figure 1 and Figure 2 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 400 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 400, reduces the possibility of the wire 400 being hooked and damaged, avoids the wire 400 affecting the movement of the inner blade tube 220 in the first channel 214, and also avoids the wire 400 contaminating the surgical environment, thereby improving the safety of the surgery.

[0054] This utility model also proposes a biopsy sampling device, comprising: The aforementioned biopsy needle; Drive handle 500, drive connected biopsy needle, drive handle 500 has docking electrode assembly 510; and A high-frequency generator is used to generate high-frequency current and is electrically connected to each electrode in the docking electrode group 510.

[0055] 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, and will not be described in detail here. The complete energy transmission circuit includes a high-frequency generator, a docking motor assembly on the drive handle 500, an electrode assembly 300, an outer blade tube 210, a puncture head 230, a lead wire 400 on the biopsy needle, and the target tissue.

[0056] like Figure 1 In the illustrated embodiment, the docking electrode assembly 510 includes a first docking electrode 511 and a second docking electrode 512. 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 512 of the drive handle 500, and then from the second docking electrode 512 to the second electrode 320 of the biopsy needle. It is then transmitted to the puncture head 230 through the wire 400. The puncture head 230 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, and then is transmitted to the second sub-region 2122 through the tube body of the outer blade tube 210. It is then transmitted to the first docking electrode 511 of the drive handle 500 through the first electrode 310, and finally transmitted back to the high-frequency generator from the first docking electrode 511, forming a complete current loop.

[0057] 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: Housing assembly; A blade assembly, passing through the housing assembly, is used to connect to the drive handle; An electrode assembly includes at least two electrodes of opposite polarity. The electrode assembly is disposed on the housing assembly and electrically connected to the blade assembly. The electrode assembly is used to dock with the docking electrode group of the drive handle to form an energy transmission circuit that transfers energy from the drive handle to the blade assembly. At least one of the electrode assemblies is a spring pin connector, and the spring pin connector is elastically extendable toward the end of the drive handle.

2. The biopsy needle according to claim 1, characterized in that, The blade assembly includes: An outer blade tube has a first end and a second end opposite to each other, the second end extending into the housing assembly, and the outer blade tube is provided with a first channel and a sampling window communicating with the first channel; An inner blade tube, inserted inside the first channel, is used for transmission connection with the drive handle. A cutting edge is provided at one end of the inner blade tube near the first end. The inner blade tube is capable of axial movement and / or rotational movement relative to the sampling window, so as to cut tissue entering the first channel through the sampling window using the cutting edge. The puncture head is located at the first end of the outer knife tube and is insulated from both the outer knife tube and the inner knife tube; The electrode assembly includes a first electrode and a second electrode disposed on the housing assembly. The first electrode is electrically connected to the outer blade tube, and the second electrode is electrically connected to the puncture head.

3. The biopsy needle according to claim 1, characterized in that, The blade assembly includes: An outer blade tube has a first end and a second end opposite to each other, the second end extending into the housing assembly, and the outer blade tube is provided with a first channel and a sampling window communicating with the first channel; A puncture head is located at the first end of the outer blade tube; 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 to cut the tissue that enters the first channel through the sampling window by the cutting edge. The puncture head is insulated from both the outer blade tube and the inner blade tube. The electrode assembly includes a first electrode and a second electrode disposed on the housing assembly. The first electrode is connected to the outer blade tube, and the second electrode is connected to the inner blade tube; or both the first electrode and the second electrode are electrically connected to the puncture head.

4. The biopsy needle as described in claim 1, characterized in that, At least one electrode in the electrode assembly has elastically extendable first ends at both ends, one of the first ends abutting against the outer wall of the blade tube assembly, and the other first end being used to dock with an electrode in the docking electrode group.

5. The biopsy needle as described in claim 2, characterized in that, The biopsy needle also includes a lead wire, and at least one electrode in the electrode assembly has a resiliently extendable second end for docking with an electrode in the docking electrode group, and the other end is electrically connected to the puncture head via the lead wire.

6. The biopsy needle as described in claim 2, 3, or 5, characterized in that, The housing assembly includes: The outer casing; and A support base is fixed to the front end of the housing. The blade tube assembly passes through the support base along the axial direction of the support base, and each electrode of the electrode assembly passes through the support base along the radial direction of the support base.

7. The biopsy needle as described in claim 6, characterized in that, The support base has a mounting groove at the end opposite to the puncture head. The mounting groove connects the inside and outside of the support base, and each electrode of the electrode assembly passes through the mounting groove.

8. The biopsy needle as described in claim 7, characterized in that, The outer wall of each electrode in the electrode assembly is provided with a limiting part, which is used to prevent the corresponding electrode from coming out of the mounting groove along the radial direction of the support.

9. The biopsy needle as described in claim 7, characterized in that, Each electrode in the electrode assembly is bonded and / or snapped to the inner wall of the mounting groove.

10. A biopsy sampling device, characterized in that, include: Biopsy needle as described in any one of claims 1 to 9; A drive handle is connected to the biopsy needle, and the drive handle has a docking electrode assembly; as well as A high-frequency generator is used to generate high-frequency current and is electrically connected to each electrode in the docking electrode group.

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