Biopsy needle and biopsy system

Abstract

The utility model relates to a biopsy needle and a biopsy system, comprising: a shell, a knife tube assembly is arranged on the shell, and the knife tube assembly includes a puncture tube and an inner knife tube; an inner knife seat is arranged on the shell, which can drive the inner knife tube to move along the axial direction of the puncture tube; a loading locking assembly is used to load the inner knife seat; a firing assembly is used to fire the inner knife seat; a sample storage bin is used to store tissue samples, and the sample storage bin is connected to a negative pressure source. When sampling, the puncture tube penetrates the tissue, locks the inner knife seat in the loading position, and fires the inner knife seat through the firing assembly, so that the inner knife seat drives the inner knife tube to move along the axial direction of the puncture tube to cut the tissue sample, and the tissue sample is sucked and stored in the sample storage bin through negative pressure; the loading and firing actions of the inner knife seat are repeated, so that the biopsy needle can perform multiple cutting and sampling at the same puncture position, so as to achieve the effect of sampling multiple tissue samples without leaving the body and puncturing once, thereby avoiding the problem that the existing biopsy needle needs to perform multiple punctures for multiple samplings, resulting in needle channel transfer.

Description

Technical Field

[0001] The utility model relates to the technical field of biological tissue sampling equipment, in particular to a biopsy needle and a biopsy system. Background Art

[0002] At present, the existing percussion biopsy needles include a handle for controlling the position and movement of the biopsy needle, a needle for puncturing the skin, and a cutting device for cutting tissue samples. Medical staff insert the biopsy needle into the skin and position it to the position where the tissue sample needs to be collected. When the biopsy needle is in the correct position, the operator presses a button or trigger on the handle to trigger the cutting device to cut off the collected tissue sample while keeping the tissue sample inside the biopsy needle. Since the currently commonly used biopsy needles are designed to be disposable, that is, a new needle needs to be replaced after each use, each puncture can only take a sample. If multiple tissue samples need to be collected, multiple punctures are required. Multiple punctures are prone to cause needle tract transfer and inaccurate detection, and may even cause tumor cell metastasis due to multiple punctures. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, one purpose of the present invention is to provide a biopsy needle to solve the problem that the existing biopsy needle can only take one tissue sample at a time; the second purpose is to provide a biopsy system.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a biopsy needle, comprising:

[0005] case;

[0006] The knife tube assembly comprises a puncture tube connected to the housing and an inner knife tube inserted in the puncture tube, a sampling window is provided on the tube wall of the puncture tube, and a cutting edge for cutting tissue samples is provided at the front end of the inner knife tube;

[0007] An inner knife seat connected to the inner knife tube and capable of reciprocatingly sliding in the shell, the inner knife seat can drive the inner knife tube to move along the axial direction of the puncture tube, and the inner knife seat can slide to an upper position away from the sampling window;

[0008] A loading locking assembly, disposed between the housing and the inner tool holder, the loading locking assembly being used to lock the inner tool holder in a loading position;

[0009] a firing assembly operable to act on the chambered locking assembly to release the inner knife holder from the chambered position and fire forward;

[0010] The sample storage chamber has an inner cavity connected to the inner knife tube, and the inner cavity generates negative pressure by connecting to a negative pressure source. The sample storage chamber is used to store tissue samples.

[0011] Optionally, the chamber locking assembly comprises a first clamping portion and a second clamping portion that cooperate with each other, the first clamping portion is directly or indirectly arranged on the inner knife seat, and the second clamping portion is directly or indirectly arranged on the housing;

[0012] At least one of the first engaging portion and the second engaging portion is a movable or deformable movable engaging portion, so that the first engaging portion and the second engaging portion can be engaged or disengaged, and when the first engaging portion is engaged with the second engaging portion, the inner knife seat is locked in the chambered position.

[0013] Optionally, the first clamping portion is fixedly arranged on the inner tool holder, and the second clamping portion is a movable clamping portion.

[0014] Optionally, the firing assembly includes:

[0015] An operation trigger member is arranged on the housing, the operation trigger member comprises an operation portion and a trigger portion, the operation portion is used to drive the operation trigger member to reach a trigger position from an initial position along the axial direction of the puncture tube through a moving operation;

[0016] An elastic firing member, the elastic firing member being arranged between the inner knife seat and the housing;

[0017] When firing, the operating trigger member is operated to move to the trigger position, and the trigger part pushes the movable clamping part to move or deform, so that the first clamping part and the second clamping part are disengaged, and the elastic force of the elastic firing member triggers the inner knife seat to leave the loading position.

[0018] Optionally, the second engaging portion is a movable engaging portion, comprising an elastic engaging arm and a protrusion convexly provided on the elastic engaging arm, wherein the protrusion has a first inclined surface and a second inclined surface distributed along the axial direction of the inner knife tube, and the first inclined surface and the second inclined surface have opposite inclination directions;

[0019] When the inner knife tube moves toward the chambering position, the first engaging portion pushes the first inclined surface, causing the elastic engaging arm to deform adaptively, and the first engaging portion engages with the protrusion;

[0020] When the operation trigger member is operated to move toward the trigger position, the trigger portion pushes the second inclined surface, causing the elastic clamping arm to deform adaptively, so that the first clamping portion and the protrusion are released from the clamping.

[0021] Optionally, an elastic reset member is further provided in the housing, and the elastic reset member is used to provide a reset elastic force for resetting the trigger component to the initial position.

[0022] Optionally, the sample storage bin is disposed in the housing, and the sample storage bin comprises a bin body and an extension portion;

[0023] The two ends of the elastic firing member are respectively against the inner knife seat and the magazine body, and the second engaging portion is indirectly arranged on the shell by being arranged on the extension portion;

[0024] Two ends of the elastic reset member are respectively against the operation trigger member and the bin body.

[0025] Optionally, a loading operation portion exposed outside the shell is provided on the inner knife seat; wherein, one loading position is provided on the inner knife seat, or the inner knife seat has at least two loading positions distributed along the axial direction of the puncture tube.

[0026] Optionally, the sample storage chamber includes a cabin body and a cabin cover, wherein the cabin cover is exposed outside the shell, and the cabin cover is openably arranged on the cabin body, the cabin body is used to store tissue samples, and the cabin cover is used to seal the cabin body in a closed state.

[0027] A biopsy system comprises a negative pressure source and a biopsy needle. The biopsy needle is the biopsy needle described above. The negative pressure source is connected to the sample storage chamber of the biopsy needle.

[0028] As described above, the utility model has the following beneficial effects: the skin tissue is penetrated by the puncture tube arranged on the shell body, and since the inner knife tube is arranged in the puncture tube, and the inner knife seat can drive the inner knife tube to move along the axial direction of the puncture tube, and the inner knife seat is locked in the loaded position by the loading locking assembly, and the inner knife seat is released from the loaded position and fired forward by the firing assembly, and the inner knife seat drives the inner knife tube to move along the axial direction of the puncture tube to complete the cutting of the tissue sample, and an inner cavity connected to the inner knife tube is arranged on the sample storage chamber, and the inner cavity is connected to the negative pressure source. Since there is negative pressure in the inner cavity, the tissue sample cut by the inner knife tube can be sucked and stored in the sample storage chamber, and the loading and firing actions of the inner knife seat are repeated, so that the biopsy needle can perform multiple cutting and sampling at the same position. The present application can achieve multiple sampling processes without the needle leaving the body, and multiple tissue samples can be sampled in one puncture. Multiple sampling can be performed at the same location with sufficient sample volume, making the test results more accurate. At the same time, it can effectively reduce the sampling burden on patients and effectively avoid the problem of needle tract transfer caused by the existing biopsy needle performing multiple punctures for multiple sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Shown is a schematic diagram of the structure of a biopsy needle shown in an embodiment of the present application;

[0030] Figure 2 The figure shows the internal structure of the biopsy needle shown in the embodiment of the present application;

[0031] Figure 3 Shown is a schematic structural diagram of an inner tool holder shown in an embodiment of the present application;

[0032] Figure 4 Shown is a schematic diagram of the structure of the sample storage bin shown in the embodiment of the present application;

[0033] Figure 5 Shown is a schematic diagram of the structure of the operation trigger member shown in the embodiment of the present application;

[0034] Figure 6 Shown is a schematic diagram of the structure of the upper cover shown in the embodiment of the present application;

[0035] Figure 7 Shown is a schematic diagram of the structure of the lower cover shown in an embodiment of the present application.

[0036] Description of Reference Numerals

[0037] Shell 1, upper cover 101, first limit strip 101a, lower cover 102, second limit strip 102a, knife tube assembly 2, puncture tube 201, inner knife tube 202, inner knife seat 3, first limit groove 301, second limit groove 302, loading locking assembly 4, first clamping part 401, second clamping part 402, elastic clamping arm 402a, first inclined surface 402b, second inclined surface 402c, firing assembly 5, operating trigger member 501, operating part 501a, trigger part 501b, connecting part 501c, elastic firing member 502, sample storage chamber 6, inner cavity 601, chamber body 602, chamber body 602a, extension part 602b, chamber cover 603, elastic reset member 7, clamping surface 8. DETAILED DESCRIPTION

[0038] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0039] See also Figures 1 to 7. It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the utility model in a schematic manner, so the diagram only shows the components related to the utility model rather than being drawn according to the number, shape and size of the components during actual implementation. During actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. illustrated in the drawings attached to this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of the utility model, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the utility model without affecting the effect and purpose that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0040] Before describing the embodiment of the utility model in detail, the application environment of the utility model is described first. The technology of the utility model is mainly applied to the technical field of biological tissue sampling equipment. The utility model is used to solve the problem that the existing biopsy needle can only take one tissue sample at a time.

[0041] It should be noted that a biopsy needle generally has a tip for puncture. In the description of the following embodiments, the directional term "front" refers to a direction relatively close to the tip, and "rear" refers to a direction relatively far from the tip.

[0042] Please combine Figures 1 to 7 As shown, the utility model provides a biopsy needle.

[0043] In an exemplary embodiment of the present application, the biopsy needle includes: a shell 1, a knife tube assembly 2, an inner knife seat 3, a chamber locking assembly 4, a firing assembly 5, and a sample storage chamber 6; the knife tube assembly 2 includes a puncture tube 201 connected to the shell 1 and an inner knife tube 202 inserted in the puncture tube 201, a sampling window is provided on the tube wall of the puncture tube 201, and the front end of the inner knife tube 202 has a cutting edge for cutting tissue samples; the inner knife seat 3 is connected to the inner knife tube 202, and the inner knife seat 3 can slide back and forth in the shell 1, and the inner knife seat 3 can drive the inner knife tube 202 along the puncture tube The tube 201 moves axially, and the inner knife holder 3 can slide to the loaded position away from the sampling window, that is, away from the front end of the entire biopsy needle; the loading locking assembly 4 is arranged between the shell 1 and the inner knife holder 3, and the loading locking assembly 4 is used to lock the inner knife holder 3 in the loaded position; the firing assembly 5 can be operated to act on the loading locking assembly 4 to release the inner knife holder 3 from the loaded position and fire forward; the sample storage chamber 6 has an inner cavity 601 connected to the inner knife tube 202, and the inner cavity 601 generates negative pressure by connecting to a negative pressure source, and the sample storage chamber 6 is used to store tissue samples.

[0044] In this embodiment, the puncture tube 201 is fixedly arranged on the shell 1, the inner knife tube 202 is inserted in the puncture tube 201, and the inner knife tube 202 can move relative to the puncture tube 201 along the axial direction of the puncture tube 201, the inner knife seat 3 is slidably arranged in the shell 1, the inner knife tube 202 is fixedly connected to the inner knife seat 3, and the inner knife seat 3 is used to drive the inner knife tube 202 to move along the axial direction of the puncture tube 201. Since the inner knife tube 202 is connected to the inner cavity 601 of the sample storage chamber 6, the inner cavity 601 of the sample storage chamber 6 is connected to a negative pressure source, so that the inner cavity 601 of the sample storage chamber 6 can form a negative pressure environment, so that there is a negative pressure in the inner knife tube 202; when sampling, first The inner knife holder 3 moves to the loaded position along the axial direction of the puncture tube 201, and is locked in the loaded position by the loaded locking assembly 4. The tissue sample to be cut is sucked into the puncture tube 201 from the sampling window by the negative pressure in the inner knife tube 202. The locking state of the inner knife holder 3 by the loaded locking assembly 4 is released by operating the firing assembly 5, and the inner knife holder 3 is released from the loaded position and pushed forward to fire (moved along the axial direction of the puncture tube 201 toward the sampling window). The tissue sample at the sampling window position is cut by the cutting edge provided on the inner knife tube 202, and the cut tissue sample is sucked into the sample storage chamber 6 for storage by negative pressure. The loading and firing actions of the inner knife holder 3 are repeated, so that the biopsy needle can perform multiple cutting and sampling at the same position. The present application can achieve multiple sampling processes without the needle leaving the body, and multiple tissue samples can be sampled in one puncture. Multiple sampling can be performed at the same location with sufficient sample volume, making the test results more accurate. At the same time, it can effectively reduce the sampling burden on patients and effectively avoid the problem of needle tract transfer caused by the existing biopsy needle performing multiple punctures for multiple sampling.

[0045] Exemplarily, the inner tool holder is provided with a loading operation portion exposed outside the shell, and loading is performed by pushing the loading operation backward to move the inner tool tube backward in the axial direction.

[0046] In an exemplary embodiment of the present application, the loading locking assembly 4 includes a first engaging portion 401 and a second engaging portion 402 that cooperate with each other, the first engaging portion 401 is directly arranged on the inner tool holder 3, and the second engaging portion 402 is directly or indirectly arranged on the shell 1; at least one of the first engaging portion 401 and the second engaging portion 402 is a movable or deformable movable engaging portion, so that the first engaging portion 401 and the second engaging portion 402 can be engaged or released, and when the first engaging portion 401 is engaged with the second engaging portion 402, the inner tool holder 3 is locked in the loading position.

[0047] Exemplarily, the first clamping portion 401 is integrally formed with the inner tool holder 3 and is directly disposed on the inner tool holder 3, or the first clamping portion 401 can also be fastened to the inner tool holder 3 by a connecting member (such as a bolt or a screw), and in both cases, the first clamping portion is equivalent to being directly disposed on the inner tool holder; of course, the first clamping portion 401 can also be disposed on the first connecting member, and the second connecting member is connected to the inner tool holder 401, so that the first clamping portion 401 is indirectly disposed on the inner tool holder 3 by the first connecting member. Exemplarily, the second clamping portion 402 is integrally formed with the housing 1 and is directly disposed on the housing 1, or the second clamping portion 402 can also be fastened to the housing 1 by a connecting member (such as a bolt or a screw); of course, the second clamping portion 402 can also be disposed on the second connecting member, and the second connecting member can be disposed on the housing 1, so that the second clamping portion 402 is indirectly disposed on the housing 1.

[0048] In the present embodiment, the first engaging portion 401 and the inner knife seat 3 are designed in an integrated manner, that is, the first engaging portion 401 is directly arranged on the inner knife seat 3, and the first engaging portion 401 and the inner knife seat 3 move synchronously, and the second engaging portion 402 is arranged on the extension portion 602b of the sample storage chamber 6, that is, the second engaging portion 402 is indirectly arranged on the shell 1, and the inner knife seat 3 is moved along the axial direction of the puncture tube 201. When the first engaging portion 401 is engaged with the second engaging portion 402, the inner knife seat 3 is locked in the chambered position, that is, the inner knife seat 3 is in a ready-to-fire state; if the first engaging portion 401 adopts a movable or deformable engaging portion, the firing assembly 5 acts on the first engaging portion 401 to make the first engaging portion 401 and the second engaging portion 402 engage with each other. 2, thereby firing the inner knife seat 3; if the second locking part 402 adopts a movable or deformable locking part, the firing component 5 acts on the second locking part 402 to release the locking state between the second locking part 402 and the first locking part 401, thereby firing the inner knife seat 3; if the first locking part 401 and the second locking part 402 both adopt movable or deformable movable locking parts, the firing component 5 can act on the first locking part 401 or the second locking part 402 at will to release the locking state between the first locking part 401 and the second locking part 402, thereby firing the inner knife seat 3; the movable or deformable movable locking part includes but is not limited to elastic buckles, movable push buckles, toggle elastic buckles, etc.

[0049] In an exemplary embodiment of the present application, the first clamping portion 401 is fixedly arranged on the inner tool holder 3, and the second clamping portion 402 is a movable clamping portion.

[0050] In this embodiment, the second engaging portion 402 is a deformable and movable engaging portion made of plastic material.

[0051] In an exemplary embodiment of the present application, the firing assembly 5 includes an operating trigger member 501 and an elastic firing member 502. The operating trigger member 501 is arranged on the shell 1, and the operating trigger member 501 includes an operating part 501a and a trigger part 501b. The operating part 501a is used to drive the operating trigger member 501 from the initial position to the trigger position along the axial direction of the puncture tube 201 through a moving operation; the elastic firing member 502 is arranged between the inner knife seat 3 and the shell 1; when firing, the operating trigger member 501 moves to the trigger position, and the trigger part 501b pushes the movable clamping part to move or deform, so that the first clamping part 401 and the second clamping part 402 are disengaged, and the elastic force of the elastic firing member 502 triggers the inner knife seat 3 to leave the loaded position.

[0052] Exemplarily, the operation trigger member 501 can be directly slidably set on the shell 1; or the operation trigger member 501 can also be indirectly set on the shell 1, for example, the operation trigger member 501 is slidably set on the sample storage chamber 6, a connecting portion 501c is set on the trigger portion 501b to connect the operating portion 501a, a slide groove is set on the shell 1, the connecting portion 501c is slidably connected to the slide groove, and the operating portion 501a is in sliding contact with the outer surface of the shell 1.

[0053] In this embodiment, the operation trigger member 501 includes an operation portion 501a, a trigger portion 501b and a connecting portion 501c. The trigger portion 501b is slidably connected to the sample storage chamber 6. The connecting portion 501c connects the trigger portion 501b and the operation portion 501a. The operation portion 501a is located on the outer surface of the shell 1. The connecting portion 501c is slidably arranged on the shell 1. The operation portion 501a is in sliding contact with the outer surface of the shell 1. The operation portion 501a is pushed, and the trigger portion 501a is driven through the connecting portion 501c. The trigger portion 501b moves along the axial direction of the puncture tube 201 to the engaging position, i.e., the trigger position, where the first engaging portion 401 and the second engaging portion 402 are engaged. The trigger portion 501b acts on the second engaging portion 402 to deform the second engaging portion 402, thereby releasing the engaging state between the first engaging portion 401 and the second engaging portion 402. The elastic firing member 502 provided between the inner knife holder 3 and the housing 1 triggers the inner knife holder 3 to fire forward, thereby driving the inner knife tube 202 to perform the cutting action of the tissue sample.

[0054] In an exemplary embodiment of the present application, the second engaging portion 402 is a movable engaging portion, which includes an elastic engaging arm 402a and a protrusion protruding from the elastic engaging arm 402a, wherein the protrusion has a first inclined surface 402b and a second inclined surface 402c distributed along the axial direction of the inner knife tube 202, and the inclination directions of the first inclined surface 402b and the second inclined surface 402c are opposite; when the inner knife tube 202 moves toward the loading position, the first engaging portion 401 pushes the first inclined surface 402b, so that the elastic engaging arm 402a deforms adaptively, and the first engaging portion 401 engages with the protrusion; when the operating trigger member is operated to move toward the trigger position, the trigger portion 501b pushes the second inclined surface 402c, so that the elastic engaging arm 402a deforms adaptively, so that the first engaging portion 401 is released from the protrusion.

[0055] In the present embodiment, both the first engaging portion 401 and the second engaging portion 402 are provided with an engaging surface 8, and the engaging surface 8 is a plane. The second engaging portion 402 is arranged on the extension portion 602b of the sample storage chamber 6, and the extension portion 602b is provided with a through hole along the thickness direction. The second engaging portion 402 and the extension portion 602b are designed as an integral whole, and the protrusion is suspended in the through hole by an elastic clamping arm 402a. When the inner knife seat 3 moves to the loading position, the first engaging portion 401 is provided with an inclined surface facing the same direction as the first inclined surface 402b. The inclined surface of the first engaging portion 401 cooperates with the first inclined surface 402b of the protrusion to squeeze the protrusion, so that the elastic clamping arm 402a undergoes elastic deformation. When the first engaging portion 401 passes through the first inclined surface 402b, the elastic clamping arm 402a returns to its initial position. At this time, The engaging surfaces 8 of the first engaging portion 401 and the second engaging portion 402 cooperate with each other, so that the first engaging portion 401 and the second engaging portion 402 are engaged. At this time, the inner knife seat 3 is locked in the loading position; the trigger portion 501b has an inclined surface with the same inclination direction as the second inclined surface 402c, and the operating portion 501a pushes the trigger portion 501b to move toward the second inclined surface 402c through the connecting portion 501c, and the trigger portion 501b squeezes the second inclined surface 402c. At this time, the elastic clamping arm 402a undergoes elastic deformation, so that the engaging surfaces 8 of the first engaging portion 401 and the second engaging portion 402 are disengaged, thereby releasing the engaging state of the first engaging portion 401 and the second engaging portion 402, and the inner knife seat 3 is fired by the elastic firing piece 502 arranged between the inner knife seat 3 and the sample storage chamber 6.

[0056] In an exemplary embodiment of the present application, an elastic return member 7 is further disposed in the housing 1 , and the elastic return member 7 is used to provide a return elastic force for returning the trigger portion 501 b to the initial position.

[0057] In this embodiment, the elastic reset member 7 and the elastic firing member 502 are both springs. The elastic reset member 7 is arranged between the trigger part 501b and the sample storage chamber 6. When the trigger part 501b moves to trigger the inner knife seat 3 to fire, the elastic reset member 7 is compressed. After completing the firing action of the inner knife seat 3, the pushing force of the operating part 501a is released, and the operating trigger member 501 automatically returns to its initial position under the action of the reset elastic force of the elastic reset member 7.

[0058] In an exemplary embodiment of the present application, the sample storage chamber 6 is arranged in the shell 1, and the sample storage chamber 6 includes a chamber body 602a and an extension portion 602b; the two ends of the elastic firing member 502 are respectively against the inner knife seat 3 and the chamber body 602a, and the second clamping portion 402 is indirectly arranged on the shell 1 by being arranged on the extension portion 602b; the two ends of the elastic reset member 7 are respectively against the operation trigger member and the chamber body 602a.

[0059] In this embodiment, by setting the sample storage chamber 6 inside the shell 1, the integration of the biopsy needle is effectively improved. The chamber body 602a is used to store tissue samples and connect to a negative pressure source. The extension portion 602b is used to set the second locking portion 402 and the sliding setting operation trigger member 501 to reduce the moving stroke of the inner knife seat 3.

[0060] In an exemplary embodiment of the present application, one loading position is provided on the inner knife seat 3 ; or the inner knife seat 3 has at least two loading positions distributed along the axial direction of the puncture tube 201 .

[0061] In this embodiment, each loading position provided on the inner knife holder 3 is respectively provided with a first clamping portion 401, and each loading position corresponds to a different sampling length. The loading position can be selected according to clinical needs, thereby effectively improving the compatibility of the biopsy needle.

[0062] In an exemplary embodiment of the present application, the sample storage chamber 6 includes a cabin body 602 and a cabin cover 603, wherein the cabin cover 603 is exposed outside the shell 1, and the cabin cover 603 is openably arranged on the cabin body 602, wherein the cabin body 602 is used to store tissue samples, and the cabin cover 603 is used to seal the cabin body 602 when the cover is closed.

[0063] In another exemplary embodiment, the shell 1 includes an upper cover 101 and a lower cover 102, the length of the upper cover 101 is smaller than that of the lower cover 102, and the upper cover 101 and the lower cover 102 are covered to form an installation cavity for installing the inner knife seat 3 and the sample storage chamber 6, and the upper cover 101 is provided with a first limit strip 101a for limiting the movement of the inner knife seat 3 when loading, and the inner knife seat 3 is provided with a first limit groove 301 for cooperating with the first limit strip 101a, and the lower cover 102 is provided with a second limit strip 102a for limiting the movement of the inner knife seat 3 when firing, and the inner knife seat 3 is provided with a second limit groove 302 for cooperating with the second limit strip 102a.

[0064] The present application also proposes a biopsy system, including a negative pressure source and a biopsy needle, wherein the negative pressure source is connected to a sample storage chamber 6 of the biopsy needle.

[0065] Working principle: when sampling tissue samples, the puncture tube 201 provided on the shell 1 punctures the skin tissue, pushes the inner knife holder 3 to move along the axial direction of the puncture tube 201 to the loading position, and the inner knife holder 3 is locked in the loading position by the first clamping part 401 and the second clamping part 402. The negative pressure source forms a negative pressure in the inner cavity 601 of the sample storage chamber 6. Since the inner knife tube 202 is connected with the inner cavity 601, a negative pressure is formed in the inner knife tube 202. The tissue sample to be cut is sucked into the puncture tube 201 from the sampling window of the puncture tube 201 through the negative pressure, and the operating part 501a is pushed. The driving force of the operating part 501a is transmitted through the connecting part 501c to drive the trigger part 501b along the axial direction of the puncture tube 201. The trigger portion 501b moves so that the second inclined surface 402c is squeezed by the trigger portion 501b, and the elastic clamping arm 402a is elastically deformed, so that the clamping surface 8 of the first clamping portion 401 and the second clamping portion 402 are disengaged, thereby releasing the clamping state of the first clamping portion 401 and the second clamping portion 402, and the inner knife holder 3 is fired by the elastic firing component, and the inner knife holder 3 drives the inner knife tube 202 to move along the axial direction of the puncture tube 201 toward the sampling window, and the tissue sample is cut by the cutting blade arranged on the inner knife tube 202, and the tissue sample cut by the inner knife tube 202 is sucked into the sample storage chamber 6 for storage by negative pressure, and the loading and firing actions of the inner knife holder 3 are repeated to realize multiple cutting and sampling by the biopsy needle at the same puncture position. The present application can achieve multiple sampling processes without the needle leaving the body, and multiple tissue samples can be sampled in one puncture. Multiple sampling can be performed at the same location with sufficient sample volume, making the test results more accurate. At the same time, it can effectively reduce the sampling burden on patients and effectively avoid the problem of needle tract transfer caused by the existing biopsy needle performing multiple punctures for multiple sampling.

[0066] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A biopsy needle, characterized in that: include: case; The knife tube assembly comprises a puncture tube connected to the housing and an inner knife tube inserted in the puncture tube, a sampling window is provided on the tube wall of the puncture tube, and a cutting edge for cutting tissue samples is provided at the front end of the inner knife tube; An inner knife seat connected to the inner knife tube and capable of sliding back and forth in the housing to drive the inner knife tube to move axially along the puncture tube, and the inner knife seat can slide to a loading position away from the sampling window; A loading locking assembly, disposed between the housing and the inner tool holder, the loading locking assembly being used to lock the inner tool holder in a loading position; a firing assembly operable to act on the chambered locking assembly to release the inner knife holder from the chambered position and fire forward; The sample storage chamber has an inner cavity connected to the inner knife tube, and the inner cavity generates negative pressure by connecting to a negative pressure source. The sample storage chamber is used to store tissue samples.

2. The biopsy needle according to claim 1, characterized in that: The chamber locking assembly comprises a first clamping portion and a second clamping portion which cooperate with each other, wherein the first clamping portion is directly or indirectly arranged on the inner knife seat, and the second clamping portion is directly or indirectly arranged on the housing; At least one of the first engaging portion and the second engaging portion is a movable or deformable movable engaging portion, so that the first engaging portion and the second engaging portion can be engaged or disengaged, and when the first engaging portion is engaged with the second engaging portion, the inner knife seat is locked in the chambered position.

3. The biopsy needle according to claim 2, characterized in that: The first clamping portion is fixedly arranged on the inner tool holder, and the second clamping portion is a movable clamping portion.

4. The biopsy needle according to claim 2, characterized in that: The firing assembly comprises: An operation trigger member is arranged on the housing, the operation trigger member comprises an operation portion and a trigger portion, the operation portion is used to drive the operation trigger member to reach a trigger position from an initial position along the axial direction of the puncture tube through a moving operation; An elastic firing member, the elastic firing member being arranged between the inner knife seat and the housing; When firing, the operating trigger member is operated to move to the trigger position, and the trigger part pushes the movable clamping part to move or deform, so that the first clamping part and the second clamping part are disengaged, and the elastic force of the elastic firing member triggers the inner knife seat to leave the loading position.

5. The biopsy needle according to claim 4, characterized in that: The second clamping portion is a movable clamping portion, comprising an elastic clamping arm and a protrusion convexly arranged on the elastic clamping arm, wherein the protrusion has a first inclined surface and a second inclined surface distributed along the axial direction of the inner knife tube, and the first inclined surface and the second inclined surface have opposite inclination directions; When the inner knife tube moves toward the chambering position, the first engaging portion pushes the first inclined surface, causing the elastic engaging arm to deform adaptively, and the first engaging portion engages with the protrusion; When the operation trigger member is operated to move toward the trigger position, the trigger portion pushes the second inclined surface, causing the elastic clamping arm to deform adaptively, so that the first clamping portion and the protrusion are released from the clamping.

6. The biopsy needle according to claim 4, characterized in that: An elastic reset member is also provided in the housing, and the elastic reset member is used to provide a reset elastic force for the trigger component to reset to the initial position.

7. The biopsy needle according to claim 6, characterized in that: The sample storage bin is arranged in the housing, and the sample storage bin comprises a bin body and an extension portion; The two ends of the elastic firing member are respectively against the inner knife seat and the magazine body, and the second engaging portion is indirectly arranged on the shell by being arranged on the extension portion; Two ends of the elastic reset member are respectively against the operation trigger member and the bin body.

8. The biopsy needle according to claim 1, characterized in that: The inner knife seat is provided with a loading operation part exposed outside the shell; Wherein, the inner knife seat is provided with a loading position, or the inner knife seat is distributed with at least two loading positions along the axial direction of the puncture tube.

9. The biopsy needle according to claim 1, characterized in that: The sample storage chamber includes a cabin body and a cabin cover, wherein the cabin cover is exposed outside the shell and is openably and closably arranged on the cabin body. The cabin body is used to store tissue samples, and the cabin cover is used to seal the cabin body in a closed state.

10. A biopsy system, characterized in that: It comprises a negative pressure source and a biopsy needle, wherein the biopsy needle is the biopsy needle as described in any one of claims 1 to 9, and the negative pressure source is connected to the sample storage chamber of the biopsy needle.

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