A multi-functional biopsy needle

Abstract

The application discloses a multifunctional biopsy needle, which comprises a shell, a perforation formed at the front end of the shell, a needle assembly, a needle core and a needle tube moving synchronously, a tail end of the needle core being connected with a needle core seat, a tail end of the needle tube being connected with a needle tube seat, the needle core seat and the needle tube seat being elastically installed in the shell through spring assemblies respectively, a limiting slide way being arranged in the shell, and elastic clamping members being formed on the needle core seat and the needle tube seat respectively; an upper string assembly being elastically installed at the front end; when the upper string assembly is pressed backward, the elastic clamping members on the needle core seat and the needle tube seat are fixed with the clamping members of the shell, the needle core and the needle tube are in a standby state, the shell is provided with elastic buttons, the elastic buttons comprise a semi-automatic button and a full-automatic button, the semi-automatic button abuts against an elastic clamping member of the needle core seat, and the full-automatic button abuts against the elastic clamping members of the needle core seat and the needle tube seat simultaneously. The multifunctional biopsy needle solves the problem that the existing disposable biopsy needle cannot realize the parallel problems of separate shooting and automatic shooting of the needle core and the needle tube.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a multifunctional biopsy needle. Background Technology

[0002] Image-guided biopsy, where a needle is guided to a target location in the body for cytological biopsy, histological biopsy, cyst aspiration, and treatment, is currently an important method for pathological diagnosis and treatment. The biopsy needle is a crucial tool in these image-guided procedures. Currently, biopsy needles typically employ an inner and outer needle structure. During use, the target area is punctured, and the core and cannula are fired simultaneously. The cannula follows the core through the puncture, cutting a portion of the tissue in the target area through the core tip and the cannula's cutting edge, placing it in the sample groove at the tip of the core tip. This tissue is then removed along with the puncture needle.

[0003] Existing disposable biopsy needles cannot achieve parallel firing of the needle core and needle tube individually or automatically, cannot switch between manual and automatic modes on the same needle, cannot adjust the puncture depth, cannot change the sample length, and cannot achieve zero-range sampling and safety control functions.

[0004] In some biopsy procedures, the surgeon needs to observe the real-time image guidance after the needle core is fired to determine if the sampling slot is correctly positioned before firing the needle tube to complete the sampling—a multi-mode firing operation. In practice, surgeons often need to adjust the puncture depth and sample length according to the size of the lesion, thus regulating the puncture depth. Some sites have adjacent blood vessels or trachea, requiring more precise punctures. Existing biopsy devices are all range-limited modes, unable to achieve precise positioning. Zero-range puncture allows the needle core and tube to directly puncture and cut in situ for sampling without winding, eliminating the need for the surgeon to calculate the firing distance, making puncture more precise, convenient, and safe. With conventional biopsy needles, holding the needle shell after winding can easily lead to misoperation, resulting in incomplete puncture and sampling, causing surgical failure and secondary injury to the patient. This invention features a safety device that locks the action before puncture and releases the safety device after puncture, improving surgical safety. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, a multifunctional biopsy needle is provided to solve the problem that existing disposable biopsy needles cannot achieve parallel firing of the needle core and needle tube individually and automatically.

[0006] To achieve the above objectives, a multifunctional biopsy needle is provided, comprising: The housing has a front end and a rear end opposite to each other, the front end having a perforation. A needle assembly includes a needle core and a needle tube movably sleeved on the needle core. The needle tube is movably inserted into the perforation. The tail end of the needle core is connected to a needle core seat, and the tail end of the needle tube is connected to a needle tube seat. The needle core seat and the needle tube seat are elastically installed in the housing by elastic components. Two limiting members are formed on the inner wall of the housing. Elastic clips are formed on the needle core seat and the needle tube seat, respectively. The upper winding assembly is elastically mounted on the front end. After the upper winding assembly pushes against the needle tube seat and the needle core seat in the direction of the rear end, the elastic retainer bypasses the limiting member and presses against the side of the limiting member facing the rear end. The button assembly includes a semi-automatic button and a fully automatic button. The housing has multiple key holes. The semi-automatic button and the fully automatic button are elastically installed in two of the key holes respectively. The semi-automatic button abuts against an elastic retainer of the needle core holder, and the fully automatic button abuts against elastic retainers of both the needle core holder and the needle tube holder. When the semi-automatic button is pressed, one elastic retainer disengages from a limiting member to eject the needle core. When the fully automatic button is pressed, another elastic retainer disengages from another limiting member to eject the needle tube. Alternatively, when the fully automatic button is pressed, both elastic retainers disengage from both limiting members simultaneously to eject the needle core and the needle tube simultaneously.

[0007] Furthermore, an adjustable distance assembly is arbitrarily mounted on the outer casing at the front end. After adjusting the position of the adjustable distance assembly, the adjustable distance assembly is positioned in front of the needle tube seat and the needle core seat. When the needle core and / or the needle tube is ejected, the needle tube seat and / or the needle core seat press against the adjustable distance assembly to reduce the range of the needle tube and / or the needle core.

[0008] Furthermore, the distance adjustment component includes a distance key and a stop block. The distance key is slidably disposed in the key hole, and the stop block is connected to the distance key. After adjusting the position of the distance key in the key hole, the distance key is positioned in front of the needle tube seat and the needle core seat.

[0009] Furthermore, it also includes a safety component, which is adjustablely mounted on the housing. After adjusting the position of the safety component, the safety component is placed between the fully automatic key, the semi-automatic key, and the two elastic clips to prevent the fully automatic key and the semi-automatic key from pressing against the elastic clips.

[0010] Furthermore, the safety component includes a safety key and a baffle. The safety key is slidably disposed in the key hole, and the baffle is connected to the safety key. After adjusting the position of the safety key in the key hole, the baffle is placed between the fully automatic key, the semi-automatic key, and the two elastic clips.

[0011] Furthermore, the housing includes an upper housing and a lower housing disposed opposite each other, the upper housing and the lower housing being detachably connected together by snap-fit.

[0012] Furthermore, the elastic component includes: A guide sleeve is provided along the front and rear end direction of the outer shell, and one end of the guide sleeve is connected to the inner wall of the rear end; A guide rod, one end of which is slidably disposed in the guide sleeve, and the other end of which is connected to the needle tube seat or needle core seat; A first spring is connected to the guide rod and the guide sleeve.

[0013] Furthermore, the upper winding assembly includes: A sliding seat is slidably disposed in the through hole, and the sliding seat has a through hole, through which the needle tube is movably disposed; The second spring is supported between the rear end and the sliding seat.

[0014] The beneficial effect of this utility model is that the multifunctional biopsy needle of this utility model, by setting up button components separately, can realize two modes of semi-automatic and fully automatic firing of the needle core and needle tube by adjusting the order of the semi-automatic and fully automatic buttons, realize manual and automatic mode switching, and improve the flexibility of biopsy puncture. Attached Figure Description

[0015] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the multifunctional biopsy needle according to an embodiment of the present invention.

[0016] Figure 2 This is an exploded structural diagram of the outer shell of an embodiment of the present utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of the outer shell of an embodiment of the present utility model.

[0018] Figure 4 This is a schematic diagram of the needle assembly according to an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the upper winding assembly according to an embodiment of the present utility model.

[0020] Figure 6 This is a schematic diagram of the structure of the adjustable distance component according to an embodiment of the present utility model.

[0021] Figure 7 This is a schematic diagram of the button assembly according to an embodiment of the present invention.

[0022] Figure 8 This is a schematic diagram of the elastic component according to an embodiment of the present invention.

[0023] Figure 9 This is a schematic diagram showing the state of the elastic clip and the limiting member in cooperation according to an embodiment of the present utility model.

[0024] Figure 10 This is a schematic diagram showing the position of the stop block when the distance key is at the 18mm impact position according to an embodiment of the present invention.

[0025] Figure 11 This is a schematic diagram showing the position of the stop block when the distance key is at the 25mm impact position in an embodiment of this utility model.

[0026] Figure 12 This is a schematic diagram showing the position of the baffle when the safety key is in the locked position according to an embodiment of the present invention.

[0027] Figure 13 This is a schematic diagram showing the position of the baffle when the safety button is in the unlocked position according to an embodiment of the present invention.

[0028] Figure label: Outer shell 1, upper shell 11, lower shell 12, buckle 13, limiting component 14; Needle assembly 2, needle core 21, needle tube 22, needle core seat 23, needle tube seat 24, elastic assembly 25, guide sleeve 251, guide rod 252, first spring 253, elastic clip a; Upper winding assembly 3, sliding seat 31, second spring 32; Button assembly 4, semi-automatic button 41, fully automatic button 42; Adjustment component 5, distance key 51, stop block 52; Safety component 6, safety button 61, baffle 62. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Reference Figures 1 to 13 As shown, this utility model provides a multifunctional biopsy needle, including: a shell 1, a needle assembly 2, a winding assembly 3, and a button assembly 4.

[0032] In this embodiment, the outer casing 1 is rectangular. The outer casing 1 has a front end and a rear end opposite each other in its length direction. A perforation is formed at the front end of the outer casing 1.

[0033] The needle assembly 2 includes a needle core 21 and a needle tube 22. The needle tube 22 is movably sleeved on the outside of the needle core 21. The needle tube 22 is movably inserted into the perforation.

[0034] See Figure 4 As shown, the tail end of the needle core 21 is connected to the needle core holder 23. The tail end of the needle tube 22 is connected to the needle tube holder 24. (Combined) Figure 3 As shown, the inner cavity of the outer casing forms a limiting slide for the needle core holder and needle tube holder to slide. The needle core holder 23 and needle tube holder 24 are elastically mounted within the outer casing 1 via elastic components 25. Figure 2 and Figure 9 As shown, two limiting members 14 are formed on the inner wall of the outer casing 1. Elastic retaining members a are formed on the needle core seat 23 and the needle tube seat 24 respectively.

[0035] The upper winding assembly 3 is elastically mounted at the front end. After the upper winding assembly 3 pushes against the needle tube seat 24 and the needle core seat 23 in the rearward direction, the elastic retainer a bypasses the limiting member 14 and presses against the rearward side of the limiting member 14.

[0036] The button assembly 4 includes a semi-automatic button 41 (semi-automatic firing button) and a fully automatic button 42 (fully automatic firing button).

[0037] See Figure 1 and Figure 7 As shown, the outer casing 1 has multiple keyholes. Specifically, at least three keyholes are provided on the front of the casing, and at least one keyhole is provided on the left side. The semi-automatic key 41 and the fully automatic key 42 are elastically mounted in two keyholes on the front of the casing, respectively. When the needle tube and needle core are wound, the semi-automatic key 41 abuts against a resilient retainer a of the needle core holder 23. When the needle tube and needle core are wound, the fully automatic key 42 abuts against both the resilient retainers a of the needle core holder 23 and the needle tube holder 24.

[0038] Similarly, when the needle is wound and the semi-automatic button 41 is pressed, one elastic clip a disengages from a limiting member 14 to allow the needle core 21 to pop out. Then, when the fully automatic button 42 is pressed, another elastic clip a disengages from another limiting member 14 to allow the needle tube 22 to pop out.

[0039] When the needle is wound up and the fully automatic button 42 is pressed, the two elastic clips a disengage from the two limiting pieces 14 at the same time, causing the needle core 21 and the needle tube 22 to pop out simultaneously.

[0040] In this embodiment, the multifunctional biopsy needle of this invention has two firing modes: semi-automatic and fully automatic. Specifically, in semi-automatic firing mode, the semi-automatic key and the fully automatic key are pressed sequentially to fire the needle core and needle tube one by one; in fully automatic firing mode, the needle core and needle tube are fired simultaneously by pressing only the fully automatic key.

[0041] See Figure 1 and combined Figure 10 and Figure 11 As shown, a distance adjustment component 5 is arbitrarily mounted on the front end of the outer casing 1.

[0042] After adjusting the position of the distance adjustment component 5, the distance adjustment component 5 is positioned in front of the needle tube seat 24 and the needle core seat 23. When the needle core 21 and / or the needle tube 22 is ejected, the needle tube seat 24 and / or the needle core seat 23 press against the distance adjustment component 5 to reduce the range of the needle tube 22 and / or the needle core 21.

[0043] When the needle core 21 is ejected, the needle core seat 23 presses against the distance adjustment assembly 5 to reduce the range of the needle core 21.

[0044] When the needle 22 is ejected, the needle seat 24 presses against the distance adjustment assembly 5 to reduce the range of the needle 22.

[0045] When the needle core 21 and needle tube 22 are ejected simultaneously, the needle tube seat 24 and needle core seat 23 press against the distance adjustment assembly 5 to reduce the range of the needle tube 22 and needle core 21.

[0046] Specifically, in combination Figure 1 and Figure 5 As shown, the distance adjustment component 5 includes a distance key 51 and a stop block 52. The distance key 51 is slidably disposed within the key hole. The stop block 52 is connected to the distance key 51.

[0047] After adjusting the position of the distance key 51 within the keyhole, the distance key 51 is positioned in front of the needle tube seat 24 and the needle core seat 23.

[0048] In this embodiment, the distance key is located in a keyhole near the front end of the outer casing. This keyhole is positioned along the width of the outer casing and is strip-shaped. Figure 1 and Figure 10 As shown, the distance key is located at one end of the keyhole, at which point the firing distance between the needle tube and the needle core is 18mm; Figure 1 and Figure 11 As shown, when the distance key moves to the other end of the key hole, the firing distance between the needle tube and the needle core is 25mm.

[0049] The distance key and the stop are assembled and fixed together for synchronous sliding. The stop has a T-shaped step. When the distance key is at the 18mm position, the stop is positioned in front of the needle tube and needle core holders. After firing, the needle tube and needle core holders impact the stop, preventing them from advancing further. When the distance key is at the 25mm position, the stop is positioned to one side of the needle tube and needle core holders. After firing, without the stop's obstruction, the needle tube and needle core holders impact the front end of the outer casing, thus increasing the distance they travel to achieve the 25mm firing distance.

[0050] In this embodiment, the multifunctional biopsy needle of the present invention also includes a safety component 6. The safety component 6 is configurably mounted on the housing 1.

[0051] After adjusting the position of the safety component 6, the safety component 6 is placed between the fully automatic key 42, the semi-automatic key 41 and the two elastic clips a to prevent the fully automatic key 42 and the semi-automatic key 41 from pressing against the elastic clips a.

[0052] Combination Figure 1 and Figure 7 As shown, the safety assembly 6 includes a safety key 61 and a baffle 62. The safety key 61 is slidably disposed within the keyhole. The baffle 62 is connected to the safety key 61.

[0053] After adjusting the position of the safety key 61 in the key hole, the baffle 62 is placed between the fully automatic key 42, the semi-automatic key 41 and the two elastic clips a.

[0054] In this embodiment, the safety key is slidably disposed in a keyhole on the left side of the housing. The safety key 6 is fixedly connected to the baffle. The safety key can slide in the keyhole on the left side of the housing to drive the baffle to abut against the side of the semi-automatic and fully automatic keys facing the needle tube seat and needle core seat, thereby simultaneously locking the semi-automatic and fully automatic keys, so that the semi-automatic and fully automatic keys cannot press the firing needle tube seat and needle core seat.

[0055] As a preferred implementation method, see [reference]. Figure 1 and Figure 2 As shown, the outer casing 1 includes an upper casing 11 and a lower casing 12. The upper casing 11 and the lower casing 12 are arranged opposite to each other and enclose a receiving space for assembling the needle tube seat, needle core seat, and spring assembly, etc. The upper casing 11 and the lower casing 12 are detachably connected together by a snap-fit ​​13.

[0056] In this embodiment, refer to Figure 3 and Figure 8 As shown, the elastic component 25 includes: a guide sleeve 251, a guide rod 252, and a first spring 253.

[0057] The guide sleeve 251 is arranged along the front and rear ends of the outer casing 1. One end of the guide sleeve 251 is connected to the inner wall of the rear end.

[0058] The guide rod 252 is coaxially arranged with the guide sleeve. One end of the guide rod 252 is slidably disposed in the guide sleeve 251. The guide rod can move along the axial direction of the guide sleeve. The other end of the guide rod 252 is connected to the needle tube seat 24 or the needle core seat 23.

[0059] The first spring 253 is connected to the guide rod 252 and the guide sleeve 251. (See reference...) Figure 3 As shown, the needle tube seat is in the wound state, the needle core seat is in the fired state, and this is the state of the elastic component.

[0060] The other end of the guide rod has a flange, and similarly, the rear end of the guide sleeve facing the outer casing also has a flange. The first spring is a helical spring. The helical spring is movably sleeved on the outside of the guide rod and the guide sleeve. The two ends of the helical spring are respectively connected to the flanges of the guide rod and the guide sleeve.

[0061] Continue reading Figure 3 As shown, in this embodiment, the upper winding assembly 3 includes: a sliding seat 31 and a second spring 32.

[0062] The sliding seat 31 is slidably disposed in the through hole. The sliding seat 31 has a through hole. The needle tube 22 is movably disposed in the through hole. The second spring 32 is supported between the rear end and the sliding seat 31. After the sliding seat is pushed towards the rear end of the outer shell to wind the needle core and the needle tube, the sliding seat slides back to its original position towards the front end of the outer shell under the elastic force of the second spring.

[0063] To prevent the slider from slipping off the housing, one end of the slider extends to the outside of the housing, and the other end extends to the inside of the housing, forming an anti-slip flange. The anti-slip flange abuts against the inner wall of the housing.

[0064] The multifunctional biopsy needle of this invention comprises an upper shell and a lower shell. The upper shell and the lower shell are connected by a snap-fit ​​mechanism. The upper shell is equipped with a semi-automatic key and a fully automatic key.

[0065] The semi-automatic button is located behind the fully automatic button. Pressing the semi-automatic button will automatically fire the needle, and pressing the fully automatic button will fire the needle.

[0066] The fully automatic button is located between the distance button and the semi-automatic button. Pressing the fully automatic button will fire the needle and needle simultaneously.

[0067] The safety component is located on the side of the upper housing. The safety button can slide to both sides, causing the baffle to lock against the semi-automatic and fully automatic buttons on the upper housing, making them impossible to press.

[0068] The upper chord assembly is located at the front end of the upper and lower housings. The sliding seat of the upper chord assembly is engaged with the upper housing, and the sliding seat can slide along the front-back direction of the housing. The lower housing is connected to the sliding seat via a second spring.

[0069] The distance adjustment assembly is located on the upper part of the upper housing. The distance key is connected and fixed to the stop block. The distance key can slide along the width of the housing to set the injection distance of the needle tube and needle core (18mm or 25mm). An injection distance of 25mm means that the needle core and needle tube are injected at a distance of 25mm; an injection distance of 18mm means that the needle core and needle tube are injected at a distance of 18mm.

[0070] The needle assembly includes a needle core, a needle core holder, a needle tube, and a needle tube holder. The tail ends of the needle tube and needle core are located inside the housing, while the head ends of the needle tube and needle core are located outside the housing. The tail end of the needle core is fixedly connected to the needle core holder, and the tail end of the needle tube is fixedly connected to the needle tube holder. The tail ends of the needle tube and needle core are respectively connected to the needle core holder and the needle tube holder. The needle core holder and the needle tube holder are in contact with the elastic assembly.

[0071] When the needle core and needle core holder are in the initial or fired state, the elastic retainer of the needle core holder disengages from the limiting member of the upper housing, and the elastic component is in the extended state. When the needle tube and needle tube holder are in the initial or fired state, the elastic retainer of the needle tube holder disengages from the limiting member of the upper housing, and the elastic component is in the extended state.

[0072] When the needle core and needle core seat are in the ready-to-fire state (i.e., the wound state), the elastic retainer of the needle core seat engages with the limiting member of the upper housing, and the elastic component is in the compression limit state. When the needle tube and needle tube seat are in the ready-to-fire state (i.e., the wound state), the elastic retainer of the needle tube seat engages with the protruding limiting member of the upper housing, and the elastic component is also in the compression limit state.

[0073] When the distance key is at the 25mm mark, and the needle core, needle core holder, needle tube, and needle tube holder are all in the ready-to-fire state, pressing the semi-automatic and / or fully automatic key will advance the needle core and needle tube by 25mm. When the distance key is at the 18mm mark, and the needle core, needle core holder, and needle tube holder are all in the ready-to-fire state, pressing the semi-automatic and / or fully automatic key will advance the needle core and needle tube by 18mm.

[0074] The needle core is fixedly connected to the needle core holder, meaning the needle core and needle core holder move synchronously. The needle tube is fixedly connected to the needle tube holder, meaning the needle tube and needle tube holder move synchronously.

[0075] When the safety button is in the locked position, even if both the needle core and the needle tube are in the ready-to-fire state, pressing the semi-automatic or fully automatic button will prevent the needle core and needle tube from firing. When the safety button is in the unlocked position, and both the needle core and the needle tube are in the ready-to-fire state, pressing the semi-automatic or fully automatic button will fire both the needle core and the needle tube. The safety component effectively prevents accidental operation during surgery.

[0076] The semi-automatic or fully automatic keys have a spring strip at the rear, which allows the semi-automatic or fully automatic keys to reset after being pressed.

[0077] In semi-automatic mode, pressing the sliding seat causes it to move backward against the needle core holder and needle tube holder. The elastic latches of the needle core holder and needle tube holder engage with the limiting member of the upper housing, placing the elastic component at its compression limit and the needle tube and needle core in a ready-to-fire state. Then, pressing the semi-automatic button disengages the elastic latch of the needle core holder from the limiting member of the upper housing, releasing the elastic component and allowing the needle core and needle core holder to fire at the set position. Pressing the fully automatic button disengages the elastic latch of the needle tube holder from the limiting member of the upper housing, releasing the other elastic component and allowing the needle tube and needle tube holder to fire at the set position.

[0078] In fully automatic mode, pressing the sliding seat causes it to move backward against the needle core holder and needle tube holder. The elastic retaining members of the needle core holder and needle tube holder engage with the limiting member of the upper housing, and the elastic component is in the compression limit state, ready to fire. Then, pressing the fully automatic button disengages the elastic retaining members of the needle core holder and needle tube holder from the limiting member of the upper housing, releases the elastic component, and the needle core and needle tube complete the firing action at the set position.

[0079] The working process of this multifunctional biopsy needle: The tip of the needle core has a sample groove with a length of 19mm, which can be used to obtain tissue samples of different lengths as needed.

[0080] Adjust the distance key to the 25mm mark. After firing, the needle core and syringe will move forward 25mm sequentially, allowing elastic tissue to enter the sample slot of the needle core, with the syringe completely sealing the sampling slot. When the syringe moves backward into the ready-to-fire state, the 19mm sample slot of the needle core is fully exposed outside the syringe, ultimately obtaining a sample with a length of 19mm.

[0081] Adjust the distance key to the 18mm mark. After firing, the needle core and syringe will move forward 18mm sequentially, allowing elastic tissue to enter the sample slot of the needle core, with the syringe completely sealing the sampling slot. When the syringe moves backward into the ready-to-fire state, only 17mm of the 19mm sample slot is exposed outside the syringe, resulting in a sample with a length of 17mm. This adjustment must be made in the ready-to-fire state.

[0082] Press the upper winding assembly backward, and the needle core and needle core seat are in the ready-to-fire state, as are the needle tube and needle tube seat.

[0083] When the safety button is in the locked position, the baffle interferes with the semi-automatic and fully automatic buttons on the upper housing, resulting in a firing inoperable state; when the safety button is in the unlocked position, the baffle does not interfere with the semi-automatic and fully automatic buttons on the upper housing, resulting in a firing inoperable state.

[0084] This utility model's multifunctional biopsy needle, by setting up separate button components, allows for semi-automatic and fully automatic firing modes of the needle core and needle tube through adjusting the order of the semi-automatic and fully automatic buttons, enabling manual and automatic mode switching and improving the flexibility of biopsy puncture.

[0085] This utility model of a multifunctional biopsy needle can not only achieve multiple operating modes of needle core and needle tube firing, but also adjust the puncture depth, and perform more precise zero-range puncture operations. It also has a safety component to improve surgical safety. At the same time, the ingenious and unique safety control function ensures the safety of this complex full-function puncture design in actual clinical operation.

[0086] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A multifunctional biopsy needle, characterized in that, include: The housing has a front end and a rear end opposite to each other, the front end having a perforation. A needle assembly includes a needle core and a needle tube movably sleeved on the needle core. The needle tube is movably inserted into the perforation. The tail end of the needle core is connected to a needle core seat, and the tail end of the needle tube is connected to a needle tube seat. The needle core seat and the needle tube seat are elastically installed in the housing by elastic components. Two limiting members are formed on the inner wall of the housing. Elastic clips are formed on the needle core seat and the needle tube seat, respectively. The upper winding assembly is elastically mounted on the front end. After the upper winding assembly pushes against the needle tube seat and the needle core seat in the direction of the rear end, the elastic retainer bypasses the limiting member and presses against the side of the limiting member facing the rear end. The button assembly includes a semi-automatic button and a fully automatic button. The housing has multiple key holes. The semi-automatic button and the fully automatic button are elastically installed in two of the key holes respectively. The semi-automatic button abuts against an elastic retainer of the needle core holder, and the fully automatic button abuts against elastic retainers of both the needle core holder and the needle tube holder. When the semi-automatic button is pressed, one elastic retainer disengages from a limiting member to eject the needle core. When the fully automatic button is pressed, another elastic retainer disengages from another limiting member to eject the needle tube. Alternatively, when the fully automatic button is pressed, both elastic retainers disengage from both limiting members simultaneously to eject the needle core and the needle tube simultaneously.

2. The multifunctional biopsy needle according to claim 1, characterized in that, An adjustable distance assembly is mounted on the outer casing at the front end. After adjusting the position of the adjustable distance assembly, the adjustable distance assembly is positioned in front of the needle tube seat and the needle core seat. When the needle core and / or the needle tube is ejected, the needle tube seat and / or the needle core seat press against the adjustable distance assembly to reduce the range of the needle tube and / or the needle core.

3. The multifunctional biopsy needle according to claim 2, characterized in that, The distance adjustment component includes a distance key and a stop block. The distance key is slidably disposed in the key hole, and the stop block is connected to the distance key. After adjusting the position of the distance key in the key hole, the distance key is positioned in front of the needle tube seat and the needle core seat.

4. The multifunctional biopsy needle according to claim 1, characterized in that, It also includes a safety component, which is adjustablely mounted on the housing. After the position of the safety component is adjusted, the safety component is placed between the fully automatic key, the semi-automatic key and the two elastic clips to prevent the fully automatic key and the semi-automatic key from pressing against the elastic clips.

5. The multifunctional biopsy needle according to claim 4, characterized in that, The safety assembly includes a safety key and a baffle. The safety key is slidably disposed in the key hole, and the baffle is connected to the safety key. After adjusting the position of the safety key in the key hole, the baffle is placed between the fully automatic key, the semi-automatic key, and the two elastic clips.

6. The multifunctional biopsy needle according to claim 1, characterized in that, The housing includes an upper housing and a lower housing disposed opposite each other, the upper housing and the lower housing being detachably connected together by snap-fit.

7. The multifunctional biopsy needle according to claim 1, characterized in that, The elastic component includes: A guide sleeve is provided along the front and rear end direction of the outer shell, and one end of the guide sleeve is connected to the inner wall of the rear end; A guide rod, one end of which is slidably disposed in the guide sleeve, and the other end of which is connected to the needle tube seat or needle core seat; A first spring is connected to the guide rod and the guide sleeve.

8. The multifunctional biopsy needle according to claim 1, characterized in that, The upper winding assembly includes: A sliding seat is slidably disposed in the through hole, and the sliding seat has a through hole, through which the needle tube is movably disposed; The second spring is supported between the rear end and the sliding seat.

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