Biopsy needle, biopsy device and biopsy system

Abstract

The utility model relates to a biopsy needle, a biopsy device and a biopsy system, because an exposure port on a shell can be directly communicated with the outside atmosphere, and a switch element is arranged in a mounting channel formed by the exposure port and a mounting through hole, when a window is closed and the switch element is in an open state, the switch element can be switched on or off; the external atmosphere is directly communicated with the communication channel through the switch element, it can be guaranteed that the external atmosphere smoothly enters the communication channel, it can also be guaranteed that enough air enters the communication channel, and through combination of communication between the communication channel and the air gap and communication between the air gap and the suction channel, the suction efficiency is improved. It is guaranteed that sufficient external atmosphere smoothly achieves air circulation with the suction channel, the situation that tissue is blocked when the suction channel is in a negative pressure state is avoided, and the sampling efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a biopsy needle, a biopsy device and a biopsy system. Background Art

[0002] In clinical medicine, biopsy needles can be used for various operations such as tissue sampling and cell aspiration of various organs. Among them, the biopsy needle includes an inner knife tube, an outer knife tube and a driving mechanism. Specifically, the outer knife tube is sleeved on the outer peripheral side of the inner knife tube, and an air gap is formed between the inner side wall of the outer knife tube and the outer side wall of the inner knife tube. The outer knife tube has a relative tip and tail end, and a window is opened near the tip of the outer knife tube. The inner knife tube can make axial linear motion and rotational motion relative to the outer knife tube under the drive of the driving mechanism to close or open the window to achieve sample peeling and sampling; during the feeding peeling process of the inner knife tube, the peeling channel needs to maintain airtightness to ensure that the maximum amount of sample is sucked in by the inner knife tube under negative pressure suction for excision; when the peeling is completed, the air gap between the inner knife tube and the outer knife tube needs to be connected to the outside atmosphere, so that the inner knife tube generates a circulating airflow under negative pressure suction, and the excised sample tissue is transported to the collector through the inner knife tube.

[0003] A conventional biopsy needle is provided with an air valve between the outer blade tube and the inner blade tube. Although this allows the air gap to be connected to the outside atmosphere, sample tissue may still be blocked in the inner blade tube. Summary of the invention

[0004] Based on this, it is necessary to provide a biopsy needle, a biopsy device and a biopsy system to address the problem of sample tissue being blocked in the inner knife tube.

[0005] The technical solution is as follows:

[0006] In one aspect, a biopsy needle is provided, comprising:

[0007] A shell, wherein the shell is provided with an exposure opening;

[0008] An outer knife tube, wherein the outer knife tube is provided with a tip, a tail and a window, wherein the window is located between the tip and the tail and is arranged close to the tip, the outer knife tube is connected to the housing, and the tail extends into the housing;

[0009] An inner knife tube, wherein the inner knife tube is provided with a suction channel extending in the axial direction, the inner knife tube comprises a front section, a middle section and a rear section, the front section of the inner knife tube is arranged in the outer knife tube and cooperates with the outer knife tube gap to form an air gap, and the middle section and the rear section of the inner knife tube extend out of the tail end of the outer knife tube and can reciprocate relative to the outer knife tube along the axial direction of the outer knife tube to close or open the window;

[0010] A mounting sleeve, wherein the mounting sleeve is disposed in the housing, the mounting sleeve is disposed on the outer peripheral side of the outer knife tube and connected to the tail end, the mounting sleeve and the middle section of the inner knife tube located outside the outer knife tube are spaced apart to form a communication channel connected to the air gap, the outer side wall of the mounting sleeve is provided with a mounting through hole extending along the radial direction of the mounting sleeve and connected to the communication channel, the mounting through hole is correspondingly connected to the exposure port to form a mounting channel connected to the outside atmosphere; and

[0011] A switch element is disposed in the installation channel, and the switch element is configured to be in an open state when the window is closed, and to be in a cut-off state when the window is opened.

[0012] The technical solution is further described below:

[0013] In one embodiment, the biopsy needle also includes a movable sleeve, which is movably arranged in the connecting channel, and the movable sleeve is arranged on the outer peripheral side of the inner knife tube. The outer side wall of the movable sleeve is provided with a sealing assembly, and the movable sleeve is provided with a conducting channel, and both ends of the conducting channel are connected with the connecting channel; wherein, when the window is closed, the movable sleeve moves relative to the mounting sleeve so that the sealing assembly and the mounting channel are spaced apart along the axial direction of the inner knife tube, and the connecting channel is connected with the mounting channel through the conducting channel; when the window is opened, the movable sleeve moves relative to the mounting sleeve so that the sealing assembly and the mounting channel are sealed and matched.

[0014] In one embodiment, the sealing assembly includes a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are both sleeved on the outer side wall of the movable sleeve and spaced apart along the axial direction of the inner knife tube, and the first sealing ring and the second sealing ring are both sealed and fitted with the mounting sleeve;

[0015] Wherein, when the window is closed, the movable sleeve moves so that the first sealing ring and the second sealing ring are both located on the side of the installation channel close to the tip; when the window is opened, the movable sleeve moves so that the installation channel is located between the first sealing ring and the second sealing ring.

[0016] In one embodiment, the biopsy needle further comprises a connecting sleeve and a driving mechanism, wherein the connecting sleeve is arranged relative to the movable sleeve away from the tip, the connecting sleeve is sleeved on the outer side wall of the inner knife tube and is fixedly connected to the inner knife tube, the driving mechanism is drivingly connected to the connecting sleeve to drive the inner knife tube to reciprocate along the axial direction of the outer knife tube, the connecting sleeve is partially arranged in the connecting channel, and the movable sleeve and the projection of the connecting sleeve in the axial direction of the inner knife tube overlap, and the connecting sleeve is provided with a first guide channel extending radially and correspondingly connected to the guide channel at one end of the connecting sleeve facing the movable sleeve;

[0017] Wherein, when the window is closed, the connecting sleeve and the movable sleeve cooperate with each other to make the sealing assembly and the mounting channel spaced apart along the axial direction of the inner knife tube; when the window is opened, the connecting sleeve and the movable sleeve have no force cooperation, and the sealing assembly and the mounting channel are sealed and cooperated.

[0018] In one embodiment, the movable sleeve has one end facing the connecting sleeve with a second guide channel extending radially and communicating with the conducting channel. When the connecting sleeve and the movable sleeve are force-matched, the second guide channel is correspondingly communicated with the first guide channel.

[0019] In one embodiment, the first flow guiding channel extends to the outer side wall of the connecting sleeve; the second flow guiding channel extends to be spaced apart from the outer side wall of the movable sleeve.

[0020] In one embodiment, at least two second flow guide channels are provided along the circumference of the movable sleeve, and at least two first flow guide channels are provided along the circumference of the connecting sleeve, and at least two first flow guide channels are connected to at least two second flow guide channels in a one-to-one correspondence.

[0021] In one of the embodiments, the outer side wall of the connecting sleeve is further provided with a sealing portion, and the sealing portion is sealingly matched with the inner side wall of the mounting sleeve.

[0022] In one embodiment, the biopsy needle also includes an elastic reset member, one end of which is connected to the movable sleeve, and the other end of which is connected to the mounting sleeve. The elastic reset member is constructed to be in a deformed state when the sealing assembly and the mounting channel are arranged axially at intervals along the inner knife tube to apply a reset force to the movable sleeve to drive the movable sleeve to move so that the sealing assembly and the mounting channel are sealed and matched.

[0023] In one of the embodiments, the elastic reset member is arranged close to the tip relative to the movable sleeve; wherein, when the sealing assembly and the mounting channel are arranged at an axial spacing along the inner knife tube, the elastic reset member is in a compressive deformation state and applies a reset force to the movable sleeve along the axial direction of the inner knife tube and in a direction away from the tip; when the movable sleeve moves to make the sealing assembly and the mounting channel seal and cooperate, the elastic reset member is in a natural state.

[0024] On the other hand, a biopsy device is provided, comprising a biopsy handle and a biopsy needle, wherein the biopsy needle is arranged on the biopsy handle, and the biopsy needle is any of the biopsy needles described above.

[0025] On the other hand, a biopsy system is provided, comprising a negative pressure source and any one of the above-mentioned biopsy devices, wherein the negative pressure source is connected to the suction channel to provide negative pressure in the suction channel.

[0026] In the biopsy needle, biopsy device and biopsy system of the above-mentioned embodiments, when the inner knife tube moves to the window-closing position relative to the outer knife tube and closes the window, the switch element is in an open state so that the outside atmosphere is connected to the connecting channel, and then the air gap is connected to the outside atmosphere, so that the outside atmosphere can be connected to the suction channel through the switch element, the connecting channel and the air gap in sequence, and then air circulation can be achieved to smoothly suck the cut sample tissue into the collector through the suction channel to complete the sampling; when the inner knife tube opens the window, the inner knife tube cuts the tissue relative to the outer knife tube and moves in a straight line toward the window-closing position. At this time, since the switch element is in the cut-off state, the blood and other liquids in the air gap and the connecting channel will not leak. Since the exposed port on the shell can be directly connected to the outside atmosphere, the switch element is installed in the installation channel formed by the exposed port and the installation through hole. When the window is closed and the switch element is in an open state, the outside atmosphere is directly connected to the connecting channel through the switch element, which not only ensures that the outside atmosphere can smoothly enter the connecting channel, but also ensures that a sufficient amount of air enters the connecting channel. Combined with the connection between the connecting channel and the air gap and the connection between the air gap and the suction channel, it is ensured that a sufficient amount of outside air can smoothly circulate with the suction channel, avoiding tissue blockage in the suction channel under negative pressure state, thereby ensuring sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 is a schematic structural diagram of a biopsy needle according to an embodiment;

[0030] Figure 2 for Figure 1 A partial enlarged view of part A of the biopsy needle;

[0031] Figure 3 for Figure 1 Axial cross-sectional view of the biopsy needle when the window is opened;

[0032] Figure 4 for Figure 1 An axial cross-sectional view of the biopsy needle when the window is closed;

[0033] Figure 5 for Figure 4 A partial enlarged view of part B of the biopsy needle;

[0034] Figure 6 for Figure 4 A partial enlarged view of the C portion of the biopsy needle;

[0035] Figure 7 for Figure 1 A schematic diagram of the structure of the movable sleeve of the biopsy needle;

[0036] Figure 8 for Figure 1 Schematic diagram of the structure of the connecting sleeve of the biopsy needle.

[0037] Description of reference numerals:

[0038] 10. Biopsy needle; 100. Shell; 110. Exposure port; 200. Outer knife tube; 210. Tip; 220. Tail end; 230. Window; 300. Inner knife tube; 310. Suction channel; 400. Air gap; 500. Mounting sleeve; 510. Connecting channel; 600. Mounting channel; 700. Switch element; 800. Movable sleeve; 810. Sealing assembly; 811. First sealing ring; 812. Second sealing ring; 820. Conducting channel; 830. Second flow guide channel; 900. Connecting sleeve; 910. First flow guide channel; 920. Sealing part; 1000. Driving mechanism; 2000. Elastic reset member. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0040] During the use of the biopsy needle, the inner blade tube is driven by the driving mechanism to perform axial linear motion and rotational motion relative to the outer blade tube to close or open the window. Specifically, when the inner blade tube performs axial linear motion relative to the outer blade tube, the inner blade tube reciprocates between the window closing position and the window opening position. When the inner blade tube is at the window closing position, the window is closed, and when the inner blade tube is at the window opening position, the window is partially or completely opened. More specifically, when the inner knife tube closes the window, that is, the inner knife tube moves to the window-closing position relative to the outer knife tube, the suction device needs to suck out the cut sample tissue through the suction channel of the inner knife tube to complete the sampling. In order to ensure smooth sampling, the air gap needs to be connected to the outside atmosphere so that the suction channel in the inner knife tube and the outside atmosphere can achieve air circulation to smoothly suck the cut sample tissue into the collector; when the inner knife tube opens the window, that is, the inner knife tube is in the window-opening position relative to the outer knife tube, the inner knife tube cuts the tissue relative to the outer knife tube and moves toward the window-closing position. In order to ensure that no liquid leakage occurs during the cutting process, the air gap needs to be isolated from the outside atmosphere.

[0041] In order to selectively connect or isolate the air gap from the outside atmosphere, a conventional biopsy needle sets an air valve between the outer blade tube and the inner blade tube to control the connection or isolation of the air gap from the outside atmosphere. However, the air valve of the conventional biopsy needle needs to be connected to the outside atmosphere through the assembly gap, which has the problem of poor air intake or too little air intake, resulting in tissue blockage in the suction channel of the inner blade tube under negative pressure.

[0042] like Figures 1 to 6 As shown, one embodiment of the present application provides a biopsy needle 10 , including a housing 100 , an outer blade tube 200 , an inner blade tube 300 , a mounting sleeve 500 and a switch element 700 .

[0043] like Figure 1 and Figure 6 As shown, the housing 100 can serve as a grip portion for easy operation, and an exposure port 110 is provided on the housing 100. Specifically, the housing 100 can be a cavity structure, and an exposure port 110 that is interconnected with the internal cavity is provided on the outer side wall of the housing 100, so that the external atmosphere is directly connected to the internal cavity of the housing 100 through the exposure port 110.

[0044] like Figure 1 , Figure 2 and Figure 5 As shown, the outer knife tube 200 is provided with a tip 210, a tail end 220 and a window 230, and the tip 210 can be used to insert into tissue for sampling, the tail end 220 is the other end relative to the tip 210, and the window 230 is located between the tip 210 and the tail end 220, and the window 230 is arranged close to the tip 210. At the same time, the outer knife tube 200 and the housing 100 are assembled and connected by plugging, and the tail end 220 of the outer knife tube 200 can extend into the housing 100.

[0045] It should be noted that the overall structure of the outer knife tube 200 can adopt the existing structure. The outer knife tube 200 can be a hollow tube except for the tip 210. The window 230 can be in a long strip or other contour shape. The window 230 is connected to the inner cavity of the outer knife tube 200, so that the tissue cut off can enter the inner knife tube 300 through the window 230.

[0046] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the inner knife tube 300 is provided with a suction channel 310 extending in the axial direction, and the inner knife tube includes a front section, a middle section and a rear section. The front section of the inner knife tube 300 is arranged in the outer knife tube 200 and is gap-matched with the outer knife tube 200 to form an air gap 400. The middle section and the rear section of the inner knife tube 300 extend out of the tail end 220 of the outer knife tube 200, that is, the outer side wall of the inner knife tube 300 and the inner side wall of the outer knife tube 200 are spaced to form an air gap 400. In addition, the inner knife tube 300 can reciprocate along the axial direction of the outer knife tube 200 relative to the outer knife tube 200 under the drive of the driving mechanism 1000, and the window 230 is closed or opened by the reciprocating movement of the inner knife tube 300 relative to the outer knife tube 200.

[0047] like Figures 3 to 6 As shown, the mounting sleeve 500 is arranged in the housing 100, and the mounting sleeve 500 is arranged on the outer peripheral side of the outer blade tube 200 and connected to the tail end 220 by welding, screwing or clamping. In addition, the mounting sleeve 500 and the middle section of the inner blade tube 300 are spaced to form a connecting channel 510 connected to the air gap 400. In addition, the outer side wall of the mounting sleeve 500 is provided with a mounting through hole (not marked) extending along the radial direction of the mounting sleeve 500 and connected to the connecting channel 510. At the same time, the mounting through hole is correspondingly connected to the exposure port 110 to form a mounting channel 600 connected to the outside atmosphere.

[0048] It should be noted that the connection between the mounting sleeve 500 and the outer blade tube 200 can be achieved not only by assembling them after separate processing, but also by integral molding.

[0049] like Figure 3 , Figure 4 and Figure 6 As shown, the switch element 700 is disposed in the installation channel 600. Moreover, the switch element 700 is configured to be in an open state when the window 230 is closed, and in a cut-off state when the window 230 is opened.

[0050] The switch element 700 may be a valve body structure such as an air valve. Figure 4 and Figure 6 As shown, specifically, when the inner knife tube 300 moves to the window closing position relative to the outer knife tube 200 and closes the window 230, the suction channel 310, the air gap 400 and the connecting channel 510 are in a negative pressure environment so that the air pressure is less than the external atmospheric pressure, thereby causing the air valve to be turned on and the external atmosphere to be connected to the connecting channel 510; Figure 3 As shown, when the inner blade tube 300 opens the window 230, blood or other liquids reach the switch element 700 through the air gap 400 and the connecting channel 510. Under the action of the liquid force and / or gravity, the air valve is cut off to isolate the outside atmosphere from the connecting channel 510.

[0051] Optionally, the switch element 700 can be removably installed in the installation channel 600. Since the installation channel 600 extends radially along the installation sleeve 500, the installation channel 600 is located on one side of the inner knife tube 300 and the outer knife tube 200 in the radial direction. Combined with the fact that the switch element 700 can be removably installed in the installation channel 600, the switch element 700 is located on the same side of the inner knife tube 300 and the outer knife tube 200. Even if the switch element 700 is damaged or fails, the switch element 700 can be simply and conveniently removed from the installation channel 600 for repair or maintenance, and the disassembly and assembly are convenient.

[0052] Optionally, in order to ensure the reliability of the installation of the switch element 700, a mounting structure such as a mounting boss can be provided on the outer wall of the shell 100 along the radial direction of the shell 100, and an exposed opening 110 connected to the mounting through hole is opened on the mounting structure such as the mounting boss to form a mounting channel 600. The mounting boss is used to increase the contact area with the switch element 700, thereby ensuring the stability of the switch element 700 installed in the mounting channel 600.

[0053] like Figure 4 and Figure 6As shown, specifically, when the inner blade tube 300 moves to the window closing position relative to the outer blade tube 200 and closes the window 230, the switch element 700 is in an open state so that the outside atmosphere is connected to the connecting channel 510, and then the air gap 400 is connected to the outside atmosphere, so that the outside atmosphere can be connected to the suction channel 310 through the switch element 700, the connecting channel 510 and the air gap 400 in sequence, and then air circulation can be achieved to smoothly suck the peeled sample tissue into the collector through the suction channel 310 to complete the sampling; Figure 3 As shown, when the inner blade tube 300 opens the window 230, the inner blade tube 300 cuts the tissue relative to the outer blade tube 200 and moves linearly toward the window closing position. At this time, since the switch element 700 is in the cut-off state, the blood and other liquids in the air gap 400 and the connecting channel 510 will not leak.

[0054] At the same time, since the exposure port 110 on the shell 100 can be directly connected to the outside atmosphere, the switch element 700 is installed in the installation channel 600 formed by the exposure port 110 and the installation through hole. When the window 230 is closed and the switch element 700 is in an open state, the outside atmosphere is directly connected to the connecting channel 510 through the switch element 700, which can not only ensure that the outside atmosphere can smoothly enter the connecting channel 510, but also ensure that a sufficient amount of air enters the connecting channel 510. Combined with the connection between the connecting channel 510 and the air gap 400 and the connection between the air gap 400 and the suction channel 310, it is ensured that a sufficient amount of outside atmosphere can smoothly realize air circulation with the suction channel 310, thereby avoiding tissue blockage in the suction channel 310 under negative pressure state and ensuring sampling efficiency.

[0055] like Figure 3 , Figure 4 and Figure 6 As shown, optionally, the biopsy needle 10 further includes a movable sleeve 800. The movable sleeve 800 is movably disposed in the connecting passage 510. Specifically, the movable sleeve 800 can reciprocate along the axial direction of the inner knife tube 300 relative to the mounting sleeve 500. In addition, the movable sleeve 800 is sleeved on the outer peripheral side of the inner knife tube 300, and a sealing assembly 810 is disposed on the outer wall of the movable sleeve 800. The movable sleeve 800 is provided with a conducting passage 820 that penetrates the movable sleeve 800 along the axial direction of the inner knife tube 300, and both ends of the conducting passage 820 are connected to the connecting passage 510. For example, see Figure 4, along the axial direction of the inner knife tube 300, the conducting channel 820 runs through the opposite sides of the movable sleeve 800, so that both ends of the conducting channel 820 are connected to the connecting channel 510. It is worth mentioning that the conducting channel can also be arranged in an incompletely extended manner along the axial direction of the inner knife tube, and one end of the conducting channel is directly set on the end face of the movable sleeve 800, and the other end is set on the side wall of the movable sleeve 800, as long as the two ends can be connected with the connecting channel 510. At the same time, Figure 4 and Figure 6 As shown, when the window 230 is closed, the movable sleeve 800 moves relative to the installation sleeve 500 to make the sealing component 810 and the installation channel 600 spaced apart along the axial direction of the inner knife tube 300, so that the connecting channel 510 is connected with the installing channel 600 through the conducting channel 820, and then when the switch element 700 is in the open state, the outside atmosphere is directly connected with the connecting channel 510 through the switch element 700 and the conducting channel 820, which can not only ensure that the outside atmosphere smoothly enters the connecting channel 510, but also ensure that a sufficient amount of air enters the connecting channel 510. Combined with the connection between the connecting channel 510 and the air gap 400 and the connection between the air gap 400 and the suction channel 310, it is ensured that a sufficient amount of outside atmosphere can smoothly realize air circulation with the suction channel 310, avoiding tissue blockage of the suction channel 310 under negative pressure state, and ensuring sampling efficiency. Figure 3 As shown, when the window 230 is opened, the movable sleeve 800 moves relative to the mounting sleeve 500 to make the sealing assembly 810 seal with the mounting channel 600, thereby preventing the leakage of liquids such as blood in the air gap 400, the connecting channel 510 and the conducting channel 820. Combined with the cut-off state of the switch element 700, a double isolation effect is achieved, which can more effectively prevent the leakage of liquids such as blood.

[0056] In one embodiment, the inner wall of the movable sleeve 800 and the outer wall of the inner knife tube 300 are spaced apart to form a conducting channel 820 .

[0057] The sealing cooperation between the sealing component 810 and the installation channel 600 can be achieved by shielding and blocking, or by truncation and sealing.

[0058] like Figure 3 , Figure 4 and Figure 6As shown, in one embodiment, the sealing assembly 810 includes a first sealing ring 811 and a second sealing ring 812. The first sealing ring 811 and the second sealing ring 812 are both sleeved on the outer wall of the movable sleeve 800 and spaced apart along the axial direction of the inner knife tube 300, and the first sealing ring 811 and the second sealing ring 812 are both sealed and fitted with the mounting sleeve 500. Moreover, when the window 230 is closed, the movable sleeve 800 moves to make the first sealing ring 811 and the second sealing ring 812 both located on the side of the mounting channel 600 close to the tip 210, that is, the first sealing ring 811 and the second sealing ring 812 are both located on the same side of the mounting channel 600, so that the connecting channel 510 is connected with the mounting channel 600, and then when the switch element 700 is in the open state, the outside atmosphere is directly connected with the connecting channel 510 through the switch element 700, which can not only ensure that the outside atmosphere can smoothly enter the connecting channel 510, but also ensure that a sufficient amount of air can enter the connecting channel 510. Combined with the connection between the connecting channel 510 and the air gap 400 and the connection between the air gap 400 and the suction channel 310, it is ensured that a sufficient amount of outside atmosphere can smoothly realize air circulation with the suction channel 310, thereby avoiding tissue blockage of the suction channel 310 under negative pressure state and ensuring sampling efficiency. Moreover, when the window 230 is opened, the movable sleeve 800 moves to make the installation channel 600 located between the first sealing ring 811 and the second sealing ring 812, that is, along the axial direction of the inner knife tube 300, the first sealing ring 811 and the second sealing ring 812 are respectively located on the opposite sides of the installation channel 600, so that the connecting channel 510 and the installing channel 600 are cut off, thereby preventing the leakage of blood or other liquids in the connecting channel 510. Combined with the cut-off state of the switch element 700, the double isolation effect is achieved, which can more effectively prevent the leakage of blood or other liquids in the connecting channel 510.

[0059] like Figure 3 , Figure 4 and Figure 6 As shown, in addition, the biopsy needle 10 also includes a connecting sleeve 900 and a driving mechanism 1000. Among them, the connecting sleeve 900 is arranged relative to the movable sleeve 800 away from the tip 210, and the connecting sleeve 900 is sleeved on the outer wall of the inner knife tube 300 and is fixedly connected to the inner knife tube 300 by interference fit or the like, so that the connecting sleeve 900 can synchronously move back and forth along the axial direction of the inner knife tube 300 with the inner knife tube 300. The driving mechanism 1000 is transmission-connected to the connecting sleeve 900 to drive the inner knife tube 300 to move back and forth along the axial direction of the outer knife tube 200. Moreover, the connecting sleeve 900 is partially arranged in the connecting channel 510. In addition, the projections of the movable sleeve 800 and the connecting sleeve 900 in the axial direction of the inner knife tube 300 partially overlap, so that the connecting sleeve 900 can push the movable sleeve 800 to move along the axial direction of the inner knife tube 300. As shown Figure 8As shown, at the same time, a first flow guide channel 910 extending radially and correspondingly communicating with the conducting channel 820 is provided at one end of the connecting sleeve 900 facing the movable sleeve 800. Specifically, when the inner knife tube 300 moves to close the window 230, the connecting sleeve 900 moves to contact the movable sleeve 800 under the drive of the inner knife tube 300 and exerts force to cooperate, and the sealing component 810 on the movable sleeve 800 and the installation channel 600 are arranged at intervals along the axial direction of the inner knife tube 300, so that the connecting channel 510 is connected with the installation channel 600 through the conducting channel 820 and the first flow guide channel 910, and then when the switch element 700 is in the open state, the outside atmosphere directly passes through the switch element 700. The connection of the component 700, the first flow guide channel 910 and the conduction channel 820 with the connecting channel 510 can not only ensure that the outside atmosphere can smoothly enter the connecting channel 510, but also ensure that a sufficient amount of air can enter the connecting channel 510. Combined with the connection between the connecting channel 510 and the air gap 400 and the connection between the air gap 400 and the suction channel 310, it is ensured that a sufficient amount of outside atmosphere can smoothly circulate air with the suction channel 310, avoiding tissue blockage in the suction channel 310 under negative pressure, thereby ensuring sampling efficiency. When the window 230 is opened, the connecting sleeve 900 moves to a non-forceful fit with the movable sleeve 800, so that the sealing component 810 is sealed with the mounting channel 600, thereby avoiding leakage of blood or other liquids in the air gap 400, the connecting channel 510, the conduction channel 820 and the first flow guide channel 910. Combined with the cut-off state of the switch element 700, a double isolation effect is achieved, which can more effectively avoid leakage of blood or other liquids.

[0060] It should be noted that the drive mechanism 1000 can adopt an existing structure or construction, and only needs to be able to drive the inner blade tube 300 to move relative to the outer blade tube 200 to complete the corresponding rotary cutting, closing and opening of the window 230. The drive mechanism 1000 can drive the inner blade tube 300 in a direct driving form or an indirect driving form such as setting an intermediate element.

[0061] In addition, when the connecting sleeve 900 is moved under the drive of the inner knife tube 300 to contact and cooperate with the movable sleeve 800, the conducting channel 820 on the movable sleeve 800 is connected to the first guide channel 910 on the connecting sleeve 900 to avoid conflict and interference, and can ensure that the outside atmosphere can smoothly pass through the first guide channel 910 and the conducting channel 820 into the connecting channel 510, and can also ensure that a sufficient amount of air enters the connecting channel 510 through the first guide channel 910 and the conducting channel 820. Combined with the connection between the connecting channel 510 and the air gap 400 and the connection between the air gap 400 and the suction channel 310, it is ensured that a sufficient amount of outside air can smoothly circulate with the suction channel 310, avoiding tissue blockage in the suction channel 310 under negative pressure, thereby ensuring sampling efficiency.

[0062] It can be understood that the force-cooperation between the connecting sleeve 900 and the movable sleeve 800 means that there is a mutual force between the connecting sleeve 900 and the movable sleeve 800. The non-force-cooperation between the connecting sleeve 900 and the movable sleeve 800 means that there may be no mutual force between the connecting sleeve 900 and the movable sleeve 800.

[0063] like Figure 7 As shown, in one embodiment, one end of the movable sleeve 800 facing the connecting sleeve 900 is provided with a second guide channel 830 extending radially and communicating with the conducting channel 820. Moreover, when the connecting sleeve 900 and the movable sleeve 800 are force-matched, the second guide channel 830 is correspondingly communicated with the first guide channel 910. In this way, when the connecting sleeve 900 is moved by the inner knife tube 300 to contact and cooperate with the movable sleeve 800, the second guide channel 830 on the movable sleeve 800 is connected to the first guide channel 910 on the connecting sleeve 900 to avoid conflict and interference, and can ensure that the outside air can smoothly pass through the first guide channel 910, the second guide channel 830, and the conducting channel 820 to enter the connecting channel 510, and can also ensure that a sufficient amount of air enters the connecting channel 510 through the first guide channel 910, the second guide channel 830, and the conducting channel 820. Combined with the connection between the connecting channel 510 and the air gap 400 and the connection between the air gap 400 and the suction channel 310, it is ensured that a sufficient amount of outside air can smoothly circulate with the suction channel 310, avoid tissue blockage in the suction channel 310 under negative pressure, and ensure sampling efficiency.

[0064] like Figure 7 and Figure 8 As shown, specifically, the first guide channel 910 extends to the outer wall of the connecting sleeve 900; the second guide channel 830 extends to be spaced from the outer wall of the movable sleeve 800. In this way, it is ensured that the first guide channel 910 and the second guide channel 830 can accurately achieve docking and conduction when the connecting sleeve 900 moves to contact with the movable sleeve 800 and exerts force to cooperate, ensuring the smooth passage of the outside atmosphere and ensuring sufficient air intake.

[0065] like Figure 7 and Figure 8As shown, optionally, along the circumference of the movable sleeve 800, at least two second guide channels 830 are provided. Along the circumference of the connecting sleeve 900, at least two first guide channels 910 are provided. And, at least two first guide channels 910 are connected with at least two second guide channels 830 in a one-to-one correspondence. In this way, when the connecting sleeve 900 moves to contact with the movable sleeve 800 and exerts force to cooperate, and the switch element 700 is in an open state, the outside air can enter each first guide channel 910 from the circumference of the connecting sleeve 900, and enter each corresponding second guide channel 830 through each first guide channel 910. Each second guide channel 830 flows the outside air into the connecting channel 510 through the conducting channel 820, thereby increasing the air intake path, which not only ensures the smoothness of the air intake, but also ensures a sufficient air intake volume.

[0066] The specific number of the first guide channel 910 and the second guide channel 830 can be flexibly adjusted or designed according to the use requirements, for example, it can be two, three or more.

[0067] like Figure 3 , Figure 4 , Figure 6 and Figure 8 As shown, in addition, the outer wall of the connecting sleeve 900 is further provided with a sealing portion 920, and the sealing portion 920 is sealed with the inner wall of the mounting sleeve 500. In this way, the sealing portion 920 can effectively prevent the blood and other liquids in the communication channel 510 from leaking through the gap between the connecting sleeve 900 and the mounting sleeve 500, thereby preventing the driving mechanism 1000 or other components from being contaminated or damaged.

[0068] The sealing portion 920 may be in the form of a sealing ring or a sealing sleeve.

[0069] like Figures 3 to 6As shown, in addition, the biopsy needle 10 further includes an elastic reset member 2000. One end of the elastic reset member 2000 is connected to the movable sleeve 800 by plugging or the like, and the other end of the elastic reset member 2000 is connected to the mounting sleeve 500 by snapping or the like. Moreover, the elastic reset member 2000 is configured to be in a deformed state when the sealing assembly 810 and the mounting channel 600 are arranged at an axial interval along the inner knife tube 300, so as to apply a reset force to the movable sleeve 800 and drive the movable sleeve 800 to move so that the sealing assembly 810 and the mounting channel 600 are sealed and matched. In this way, when the inner knife tube 300 synchronously drives the connecting sleeve 900 to move along the axial direction of the inner knife tube 300 toward the tip 210 to the closed position of the window 230, the connecting sleeve 900 applies a resistance force along the direction toward the tip 210 to the movable sleeve 800, so that the movable sleeve 800 applies force to the elastic reset member 2000 to deform the elastic reset member 2000 until the movable sleeve 800 moves relative to the mounting sleeve 500 so that the sealing assembly 810 and the mounting channel 600 are offset along the axial direction of the inner knife tube 300 so that the connecting channel 510 is connected with the mounting channel 600, and the elastic reset member 2000 can be in an extreme state of deformation, and the elastic reset member 2000 applies a reset force to the movable sleeve 800 along the axial direction of the inner knife tube 300 toward the direction away from the tip 210, and the inner knife tube 300 When moving from the closed position of the window 230 toward the open position of the window 230, the connecting sleeve 900 moves synchronously with the inner knife tube 300 along the axial direction of the inner knife tube 300 toward the direction away from the tip 210 until there is no force cooperation with the movable sleeve 800. At this time, the resistance force applied by the connecting sleeve 900 to the movable sleeve 800 along the direction close to the tip 210 disappears, and the movable sleeve 800 moves along the axial direction of the inner knife tube 300 toward the direction away from the tip 210 under the action of the reset force until the sealing assembly 810 on the movable sleeve 800 is correspondingly arranged with the mounting channel 600 along the axial direction of the inner knife tube 300, so that the sealing assembly 810 and the mounting channel 600 are sealed and cooperated to shield the mounting channel 600 to close the mounting channel 600, thereby making the connecting channel 510 and the mounting channel 600 cut off.

[0070] The elastic reset member 2000 may be a spring or other element that has elastic deformation and can provide a reset force. The deformation of the elastic reset member 2000 may be a compression deformation or a tension deformation.

[0071] like Figures 3 to 6 As shown, in one embodiment, the elastic reset member 2000 is disposed near the tip 210 relative to the movable sleeve 800, so that Figure 4 and Figure 6As shown, when the movable sleeve 800 moves to make the sealing assembly 810 and the installation channel 600 spaced apart along the axial direction of the inner knife tube 300, the elastic reset member 2000 is in a compressive deformation state, that is, when the movable sleeve 800 moves along the axial direction of the inner knife tube 300 toward the tip 210 under the force of the connecting sleeve 900, the movable sleeve 800 pushes the elastic reset member 2000 to compress and deform, so that the elastic reset member 2000 in the compressive deformation state applies a reset force to the movable sleeve 800 along the axial direction of the inner knife tube 300 and away from the tip 210. Figure 3 As shown, when the movable sleeve 800 moves to make the sealing assembly 810 and the installation channel 600 seal, the elastic reset member 2000 can be in a natural state, so that the connecting sleeve 900 moves synchronously with the inner knife tube 300 along the axial direction of the inner knife tube 300 toward the direction away from the tip 210, and the resistance force applied by the connecting sleeve 900 to the movable sleeve 800 in the direction close to the tip 210 disappears, and the movable sleeve 800 moves along the inner knife tube 300 under the action of the reset force applied by the elastic reset member 2000 in the direction away from the tip 210. 00 moves axially in a direction away from the tip 210 until the sealing assembly 810 on the movable sleeve 800 is arranged corresponding to the mounting channel 600 along the axial direction of the inner knife tube 300, so that the sealing assembly 810 shields and closes the mounting channel 600, and the elastic reset member 2000 can be in a natural state, and the reset member applied to the movable sleeve 800 by the elastic reset member 2000 disappears, so that the movable sleeve 800 remains in a position where the sealing assembly 810 closes the mounting channel 600.

[0072] It should be noted that "some body" or "some part" can be a part of the corresponding "component", that is, "some body" or "some part" can be integrally formed with the "other parts of the component"; it can also be an independent component that can be separated from the "other parts of the component", that is, "some body" or "some part" can be manufactured independently and then combined with the "other parts of the component" into a whole. The expression of the above-mentioned "some body" or "some part" in this application is only one of the embodiments, for the convenience of reading, and not to limit the scope of protection of this application. As long as it contains the above-mentioned features and has the same function, it should be understood as an equivalent technical solution of this application.

[0073] It should be noted that the components included in the "unit", "assembly", "mechanism" and "device" of this application can also be flexibly combined, that is, modular production can be carried out according to actual needs to facilitate modular assembly. The division of the above components in this application is only one of the embodiments, for the convenience of reading, and not to limit the scope of protection of this application. As long as the above components are included and have the same functions, it should be understood that it is an equivalent technical solution of this application.

[0074] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more related listed items.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] It should be noted that when an element is referred to as being "fixed on", "set on", "fixed on" or "installed on" another element, it can be directly on the other element or there can be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a central element at the same time. Further, when an element is considered to be "fixed transmission connected" to another element, the two can be fixed in a detachable connection manner or in a non-detachable connection, as long as power transmission can be achieved, such as socketing, snap-on, one-piece molding fixation, welding, etc., which can be achieved in the prior art and will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0079] It should also be understood that when explaining the connection relationship or positional relationship of elements, although not explicitly described, the connection relationship and positional relationship are interpreted as including an error range, which should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" may mean within one or more standard deviations, which are not limited here.

[0080] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A biopsy needle, characterized in that: include: A shell, wherein the shell is provided with an exposure opening; An outer knife tube, wherein the outer knife tube is provided with a tip, a tail and a window, wherein the window is located between the tip and the tail and is arranged close to the tip, the outer knife tube is connected to the housing, and the tail extends into the housing; An inner knife tube, wherein the inner knife tube is provided with a suction channel extending in the axial direction, the inner knife tube comprises a front section, a middle section and a rear section, the front section of the inner knife tube is arranged in the outer knife tube and cooperates with the outer knife tube gap to form an air gap, the middle section and the rear section of the inner knife tube extend out of the tail end of the outer knife tube, and the inner knife tube can reciprocate relative to the outer knife tube along the axial direction of the outer knife tube to close or open the window; A mounting sleeve, the mounting sleeve is arranged in the housing, the mounting sleeve is arranged on the outer peripheral side of the outer knife tube and connected to the tail end, the mounting sleeve and the middle section of the inner knife tube are spaced apart to form a communication channel connected to the air gap, the outer side wall of the mounting sleeve is provided with a mounting through hole extending along the radial direction of the mounting sleeve and connected to the communication channel, the mounting through hole is correspondingly connected to the exposure port to form a mounting channel connected to the outside atmosphere; and A switch element is disposed in the installation channel, and the switch element is configured to be in an open state when the window is closed, and to be in a cut-off state when the window is opened.

2. The biopsy needle according to claim 1, characterized in that: The biopsy needle also includes a movable sleeve, which is movably arranged in the connecting channel, and the movable sleeve is arranged on the outer peripheral side of the middle section of the inner knife tube. The outer side wall of the movable sleeve is provided with a sealing assembly, and the movable sleeve conducts the channel, and both ends of the conduction channel are connected with the connecting channel; wherein, when the window is closed, the movable sleeve moves relative to the mounting sleeve to make the sealing assembly and the mounting channel spaced apart along the axial direction of the inner knife tube, and the connecting channel is connected with the mounting channel through the conduction channel; when the window is opened, the movable sleeve moves relative to the mounting sleeve to make the sealing assembly and the mounting channel seal and cooperate.

3. The biopsy needle according to claim 2, characterized in that: The sealing assembly comprises a first sealing ring and a second sealing ring, wherein the first sealing ring and the second sealing ring are both sleeved on the outer side wall of the movable sleeve and spaced apart along the axial direction of the inner knife tube, and the first sealing ring and the second sealing ring are both sealed and fitted with the mounting sleeve; Wherein, when the window is closed, the movable sleeve moves so that the first sealing ring and the second sealing ring are both located on the side of the installation channel close to the tip; when the window is opened, the movable sleeve moves so that the installation channel is located between the first sealing ring and the second sealing ring.

4. The biopsy needle according to claim 2, characterized in that: The biopsy needle also includes a connecting sleeve and a driving mechanism, wherein the connecting sleeve is arranged relative to the movable sleeve away from the tip, the connecting sleeve is sleeved on the outer side wall of the inner knife tube and is fixedly connected to the inner knife tube, the driving mechanism is drivingly connected to the connecting sleeve to drive the inner knife tube to reciprocate along the axial direction of the outer knife tube, the connecting sleeve is partially arranged in the communicating channel, and the movable sleeve and the projection of the connecting sleeve in the axial direction of the inner knife tube overlap, and the connecting sleeve is provided with a first guide channel extending radially and correspondingly communicating with the conducting channel at one end of the connecting sleeve facing the movable sleeve; Wherein, when the window is closed, the connecting sleeve and the movable sleeve cooperate with each other to make the sealing assembly and the mounting channel spaced apart along the axial direction of the inner knife tube; when the window is opened, the connecting sleeve and the movable sleeve have no force cooperation, and the sealing assembly and the mounting channel are sealed and cooperated.

5. The biopsy needle according to claim 4, characterized in that: A second flow guiding channel extending radially and communicating with the conducting channel is disposed at one end of the movable sleeve facing the connecting sleeve. When the connecting sleeve and the movable sleeve are force-matched, the second flow guiding channel is correspondingly communicated with the first flow guiding channel.

6. The biopsy needle according to claim 5, characterized in that: The first flow guiding channel extends to the outer side wall of the connecting sleeve; the second flow guiding channel extends to be spaced apart from the outer side wall of the movable sleeve.

7. The biopsy needle according to claim 5, characterized in that: At least two second flow guide channels are provided along the circumference of the movable sleeve, and at least two first flow guide channels are provided along the circumference of the connecting sleeve. At least two first flow guide channels are connected to at least two second flow guide channels in a one-to-one correspondence.

8. The biopsy needle according to any one of claims 4 to 7, characterized in that: The outer side wall of the connecting sleeve is also provided with a sealing portion, and the sealing portion is sealingly matched with the inner side wall of the mounting sleeve.

9. The biopsy needle according to any one of claims 4 to 7, characterized in that: The biopsy needle also includes an elastic reset member, one end of which is connected to the movable sleeve, and the other end of which is connected to the mounting sleeve. The elastic reset member is constructed to be in a deformed state when the sealing assembly and the mounting channel are arranged axially at intervals along the inner knife tube to apply a reset force to the movable sleeve to drive the movable sleeve to move so that the sealing assembly and the mounting channel are sealed and matched.

10. The biopsy needle according to claim 9, characterized in that: The elastic reset member is arranged relative to the movable sleeve and close to the tip; wherein, when the sealing assembly and the mounting channel are arranged at an axial spacing along the inner knife tube, the elastic reset member is in a compressive deformation state and applies a reset force to the movable sleeve along the axial direction of the inner knife tube and in a direction away from the tip; when the movable sleeve moves to make the sealing assembly and the mounting channel seal and cooperate, the elastic reset member is in a natural state.

11. A biopsy device, comprising a biopsy handle and a biopsy needle, wherein the biopsy needle is arranged on the biopsy handle, characterized in that: The biopsy needle is the biopsy needle according to any one of claims 1 to 10.

12. A biopsy system, characterized in that: The biopsy device according to claim 11 comprises a negative pressure source, wherein the negative pressure source is connected to the suction channel to provide negative pressure in the suction channel.

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