Magnetic compatible coaxial biopsy needle

Abstract

The utility model discloses a magnetic compatible coaxial biopsy needle, which relates to the technical field of coaxial biopsy needles, and comprises an outer needle cylinder, a threaded groove is arranged on the upper side of the inner end of the outer needle cylinder, the threaded groove is in threaded connection with a locking and abutting assembly, and a plurality of placing grooves distributed in a stepped manner are arranged on the lower side of the inner end of the outer needle cylinder. Two symmetrically-arranged second springs are fixedly connected to the inner wall of each containing groove, each second spring is fixedly connected with a moving plate, an inclined plate is fixedly connected to the end, away from the corresponding second spring, of each moving plate, a drawing column is fixedly connected to the end, away from the corresponding inclined plate, of each moving plate, the second springs are sleeved with the drawing columns, and the drawing columns penetrate through the outer needle cylinder; and an extraction assembly is arranged in the outer needle cylinder. According to the utility model, the detection pins with different sizes can be directly positioned and limited, and the positioning discs corresponding to the detection pins with different sizes can be positioned and limited, so that the installation convenience of the detection pins is improved, and the installation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of coaxial biopsy needle technology, specifically a magnetically compatible coaxial biopsy needle. Background Technology

[0002] Magnetic compatibility coaxial biopsy needles are primarily used for percutaneous biopsies guided by medical imaging equipment such as MRI scanners, CT scanners, and ultrasound machines. They can obtain specimens from various tissue sites in the body, including the lungs, liver, kidneys, prostate, breast, spleen, lymph nodes, and soft tissue tumors, but are not suitable for biopsies of bone marrow or brain tissue.

[0003] For example, utility model patent CN222091734U discloses a magnetically compatible coaxial biopsy needle, including a support device with an extraction device in the middle and a clamping device at the top. The clamping device includes a rotating disk with a dial ring fixedly mounted on its outer side. Several guide grooves are evenly distributed around the circumference of the rotating disk, with a sliding rod in the middle of each guide groove. This utility model's magnetically compatible coaxial biopsy needle, through the design of guide grooves on the rotating disk, allows the four clamping blocks to evenly close when the rotating disk rotates, achieving rapid locking of the biopsy needle and improving the insertion speed. This design facilitates compatibility with different types of probes, expanding the device's applicability. A spring at the top of the rotating disk ensures the clamping block maintains a stable clamping force on the positioning disk, and rotating the outer dial completes the insertion process, further enhancing ease of use. However, when positioning the probe using the clamping device, the Z-axis position of the clamping block and positioning disk cannot be accurately determined. This results in time being spent aligning the clamping block and positioning disk in the Z-axis during the clamping process, ultimately reducing the probe insertion speed. Therefore, we propose a magnetically compatible coaxial biopsy probe. Utility Model Content

[0004] The purpose of this invention is to provide a magnetically compatible coaxial biopsy needle to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a magnetically compatible coaxial biopsy needle, comprising an outer syringe barrel, a threaded groove on the upper side of the inner end of the outer syringe barrel, a locking and abutting assembly threadedly connected to the threaded groove, and a plurality of stepped placement slots on the lower side of the inner end of the outer syringe barrel. Two symmetrically arranged second springs are fixedly connected to the inner wall of each placement slot, and a movable plate is fixedly connected to each second spring. An inclined plate is fixedly connected to the end of the movable plate away from the second spring, and a pull-out post is fixedly connected to the end of the movable plate away from the inclined plate, with the second spring sleeved on the pull-out post. The pull-out post passes through the outer syringe barrel, and an extraction assembly is provided inside the outer syringe barrel.

[0006] Preferably, the locking and clamping assembly includes an external threaded sleeve threaded onto a threaded groove, a rotating handle fixedly connected to the upper end of the external threaded sleeve, a rotating plate rotatably connected to the lower end of the rotating handle via a bearing, a first spring fixedly connected to the lower end of the rotating plate, and a clamping plate fixedly connected to the lower end of the first spring.

[0007] Preferably, the lower end of the rotating handle abuts against the upper end of the outer syringe, and the outer periphery of the rotating handle is provided with multiple anti-slip grooves distributed in a circle.

[0008] Preferably, the extraction component includes a positioning disk disposed on the inner wall of the placement slot, a detection needle is fixedly connected to the lower middle part of the positioning disk, and a movable column is fixedly connected to the middle part of the end of the positioning disk away from the detection needle.

[0009] Preferably, an operating column is fixedly connected to the upper end of the movable column, and the lower end of the abutting plate abuts against the operating column.

[0010] Preferably, a pull plate is fixedly connected to the end of the pull column away from the moving plate. The pull plate is located on the outside of the outer syringe, and the outer diameter of the pull plate is larger than the outer diameter of the pull column.

[0011] Preferably, the detection needle passes through the lower end of the outer syringe barrel, the lower end of the positioning plate abuts against the placement groove, and the upper end of the positioning plate abuts against the lower end of the inclined plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The invention is equipped with an outer syringe, a threaded groove, an extraction component, a placement groove, a second spring, a moving plate, an inclined plate, a pull-out column, and a pull-out plate. This invention enables direct positioning and limiting of detection needles of different sizes, and also enables positioning and limiting of positioning discs corresponding to detection needles of different sizes, thereby improving the ease of installation of detection needles and increasing installation efficiency.

[0014] 2. A locking and clamping assembly is provided to lock the external threaded sleeve to the threaded groove. At this time, the rotating handle can be rotated. The rotating handle drives the rotating plate, the first spring and the clamping plate to move downward. When the clamping plate contacts the operating column, the first spring will continuously compress as the rotating handle moves downward, which improves the stability of the extraction assembly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged view of the structure of section A in the middle;

[0018] Figure 4 This is a schematic cross-sectional view of the locking and clamping assembly of this utility model;

[0019] Figure 5 This is a schematic diagram of the extraction component structure of this utility model.

[0020] In the diagram: 1. Outer syringe; 2. Threaded groove; 3. Locking and clamping assembly; 31. External threaded sleeve; 32. Rotating handle; 33. Anti-slip groove; 34. Rotating plate; 35. First spring; 36. Clamping plate; 4. Extraction assembly; 41. Positioning plate; 42. Detection needle; 43. Moving column; 44. Operating column; 5. Placement slot; 6. Second spring; 7. Moving plate; 8. Inclined plate; 9. Pull-out column; 10. Pull-out plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 - Figure 5This utility model provides a technical solution: a magnetically compatible coaxial biopsy needle, including an outer syringe barrel 1, a threaded groove 2 on the upper side of the inner end of the outer syringe barrel 1, a locking and clamping component 3 threadedly connected to the threaded groove 2, a plurality of stepped placement grooves 5 on the lower side of the inner end of the outer syringe barrel 1, two symmetrically arranged second springs 6 fixedly connected to the inner wall of each placement groove 5, a movable plate 7 fixedly connected to each second spring 6, an inclined plate 8 fixedly connected to the end of the movable plate 7 away from the second spring 6, a pull-out post 9 fixedly connected to the end of the movable plate 7 away from the inclined plate 8, and the second spring 6 sleeved on the pull-out post 9, the pull-out post 9 passing through the outer syringe barrel 1, and an extraction component 4 provided inside the outer syringe barrel 1.

[0023] In this embodiment, the locking and clamping assembly 3 includes an external threaded sleeve 31 threadedly connected to the threaded groove 2. The upper end of the external threaded sleeve 31 is fixedly connected to a rotating handle 32. The lower end of the rotating handle 32 is rotatably connected to a rotating plate 34 via a bearing. The lower end of the rotating plate 34 is fixedly connected to a first spring 35. The lower end of the first spring 35 is fixedly connected to a clamping plate 36.

[0024] Specifically, the locking and clamping assembly 3 can lock the external threaded sleeve 31 to the threaded groove 2. At this time, the rotating handle 32 can be rotated. The rotating handle 32 drives the rotating plate 34, the first spring 35 and the clamping plate 36 to move downward. When the clamping plate 36 contacts the operating column 44, the first spring 35 will continuously compress as the rotating handle 32 moves downward, which improves the stability of the extraction assembly 4.

[0025] In this embodiment, the lower end of the rotating handle 32 abuts against the upper end of the outer syringe 1, and multiple anti-slip grooves 33 are provided on the outer periphery of the rotating handle 32 in a circular pattern.

[0026] Specifically, the anti-slip groove 33 can improve the stability of the rotating handle 32 during rotation.

[0027] In this embodiment, the extraction component 4 includes a positioning disk 41 disposed on the inner wall of the placement groove 5. A detection needle 42 is fixedly connected to the middle of the lower end of the positioning disk 41, and a movable column 43 is fixedly connected to the middle of the end of the positioning disk 41 away from the detection needle 42.

[0028] Specifically, the biopsy extraction action can be completed through extraction component 4.

[0029] In this embodiment, the upper end of the movable column 43 is fixedly connected to the operating column 44, and the lower end of the clamping plate 36 abuts against the operating column 44.

[0030] Specifically, this ensures that the clamping plate 36 can clamp the operating column 44.

[0031] In this embodiment, a pull plate 10 is fixedly connected to the end of the pull column 9 away from the moving plate 7. The pull plate 10 is located on the outside of the outer syringe 1, and the outer diameter of the pull plate 10 is larger than the outer diameter of the pull column 9.

[0032] Specifically, the pull-out plate 10 can be used to directly perform work on the pull-out column 9.

[0033] In this embodiment, the detection needle 42 is disposed through the lower end of the outer syringe 1, the lower end of the positioning plate 41 abuts against the placement groove 5, and the upper end of the positioning plate 41 abuts against the lower end of the inclined plate 8.

[0034] Specifically, ensure that the detection needle 42 does not interfere during use.

[0035] Working principle: When installing the extraction component 4, it can be placed inside the outer syringe 1. The positioning plate 41 moves downwards, and different sized positioning plates 41 will contact the inclined plates 8 on each layer. As the positioning plates 41 move downwards, they push the inclined plates 8. The inclined plates 8 drive the moving plate 7, the pull-out column 9, and the pull-out plate 10 to move outwards and then back. At this time, the second spring 6 compresses and then recovers. After the inclined plates 8 press against the upper end of the positioning plate 41, the external threaded sleeve 31 can be locked to the threaded groove 2. Rotating the handle 32 causes the rotating plate 34, the first spring 35, and the abutment plate 36 to move downwards. When the abutment plate 36 contacts the operating column 44, the first spring 35 will continuously compress as the handle 32 moves downwards. This invention enables direct positioning and limiting of detection needles 42 of different sizes, and also enables positioning and limiting of positioning discs 41 corresponding to detection needles 42 of different sizes, improving the ease of installation of detection needles 42 and increasing installation efficiency.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A magnetically compatible coaxial biopsy needle, comprising an outer syringe barrel (1), characterized in that: The upper inner end of the outer syringe (1) is provided with a threaded groove (2), and the threaded groove (2) is threadedly connected to a locking and abutting component (3). The lower inner end of the outer syringe (1) is provided with multiple placement grooves (5) arranged in a stepped manner. Each placement groove (5) is fixedly connected to two symmetrically arranged second springs (6). Each second spring (6) is fixedly connected to a moving plate (7). The end of the moving plate (7) away from the second spring (6) is fixedly connected to an inclined plate (8). The end of the moving plate (7) away from the inclined plate (8) is fixedly connected to a pull-out column (9), and the second spring (6) is sleeved on the pull-out column (9). The pull-out column (9) passes through the outer syringe (1). The outer syringe (1) is provided with an extraction component (4).

2. The magnetically compatible coaxial biopsy needle according to claim 1, characterized in that: The locking and clamping assembly (3) includes an external threaded sleeve (31) threaded onto a threaded groove (2). The upper end of the external threaded sleeve (31) is fixedly connected to a rotating handle (32). The lower end of the rotating handle (32) is rotatably connected to a rotating plate (34) via a bearing. The lower end of the rotating plate (34) is fixedly connected to a first spring (35). The lower end of the first spring (35) is fixedly connected to a clamping plate (36).

3. A magnetically compatible coaxial biopsy needle according to claim 2, characterized in that: The lower end of the rotating handle (32) abuts against the upper end of the outer syringe (1), and multiple anti-slip grooves (33) are provided on the outer periphery of the rotating handle (32) in a circular pattern.

4. A magnetically compatible coaxial biopsy needle according to claim 2, characterized in that: The extraction component (4) includes a positioning disk (41) disposed on the inner wall of the placement slot (5). A detection needle (42) is fixedly connected to the middle of the lower end of the positioning disk (41), and a movable column (43) is fixedly connected to the middle of the end of the positioning disk (41) away from the detection needle (42).

5. A magnetically compatible coaxial biopsy needle according to claim 4, characterized in that: The upper end of the movable column (43) is fixedly connected to the operating column (44), and the lower end of the abutting plate (36) abuts against the operating column (44).

6. A magnetically compatible coaxial biopsy needle according to claim 1, characterized in that: The pull-out column (9) is fixedly connected to a pull-out plate (10) at the end away from the moving plate (7). The pull-out plate (10) is located on the outside of the outer syringe (1). The outer diameter of the pull-out plate (10) is larger than the outer diameter of the pull-out column (9).

7. A magnetically compatible coaxial biopsy needle according to claim 4, characterized in that: The detection needle (42) is set through the lower end of the outer syringe (1), the lower end of the positioning plate (41) abuts against the placement groove (5), and the upper end of the positioning plate (41) abuts against the lower end of the inclined plate (8).

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