Disposable biopsy needle

Abstract

The utility model relates to the technical field of medical instruments, and discloses a disposable biopsy needle which comprises a needle core, a needle tube and a handle, the needle core is inserted in the needle tube in a sliding mode, the handle comprises an upper shell and a lower shell, and the upper shell and the lower shell are attached to each other and fixedly connected to form a cylindrical inner cavity together. A cylindrical inner cavity is formed in the needle core, a part of the needle core and a part of the needle tube are inserted into the cylindrical inner cavity in a sliding mode, two movable blocks are connected to the interior of the cylindrical inner cavity in a sliding mode, and embedding grooves are formed in the surfaces of the movable blocks, an operator can easily control the relative position of the needle core and the needle tube through the strip-shaped sliding hole, the sliding block and the pushing piece, and the sampling groove is exposed and shielded; by means of the design of the separating groove, the handle can be easily separated through fingers when needing to be disassembled, the needle core and the needle tube can be conveniently replaced when being used in a disposable mode, the risk of cross infection is effectively avoided, and using flexibility and convenience are improved.

Description

Technical Field

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

[0002] A biopsy needle is a medical device used for sampling and aspirating cells from pyramidal tumors and unidentified tumors in various organs such as the kidneys, liver, lungs, breast, thyroid, prostate, pancreas, testes, uterus, ovaries, and the body surface. Some manually operated biopsy needles, such as traditional tissue cutting needles or trephine needles, require the operator to manually adjust the position of the needle core and cannula, as well as control the cutting force and depth. These operations are not only complex and tedious, but also require the operator to have a high level of skill.

[0003] Some more complex biopsy needles, such as semi-automatic or fully automatic biopsy needles with multiple moving parts, are costly despite their diverse functions. Reusable biopsy needles, such as metal tissue cutting needles or trephine needles, require frequent contact with the patient's lesions, and if not thoroughly sterilized or poorly designed, they can easily lead to cross-infection risks. Utility Model Content

[0004] The purpose of this invention is to provide a disposable biopsy needle to address the aforementioned shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a disposable biopsy needle, comprising a needle core, a needle tube, and a handle. The needle core is slidably inserted into the needle tube. The handle comprises an upper shell and a lower shell, which are attached and fixedly connected to each other to form a cylindrical inner cavity. A portion of the needle core and the needle tube are slidably inserted into the cylindrical inner cavity. Two movable blocks are slidably connected inside the cylindrical inner cavity. Each movable block has an embedding groove on its surface. An assembly head is fixedly connected to one end of both the needle core and the needle tube. The assembly heads are respectively embedded in the embedding grooves of the corresponding movable blocks. A pressing rod is slidably connected to one end of the handle. One end of the pressing rod is fixedly connected to one of the movable blocks. The needle core is driven to slide inside the needle tube by operating the pressing rod.

[0006] Preferably, the bottom of the lower shell has a strip-shaped sliding hole, and the bottom of each movable block is fixedly connected to a slider. The slider is slidably connected inside the strip-shaped sliding hole, and the bottom of the slider is fixedly connected to a push plate. The push plate can serve as a visual indicator to help the user identify the current position of the movable block. On the other hand, the user can directly push the push plate with their finger to move the movable block and the needle core or needle tube connected to it, thereby achieving more flexible and convenient operation control.

[0007] Preferably, the lower shell has equidistant locking holes on both sides, and the upper shell has equidistant locking feet on both sides. The locking feet and locking holes are aligned and inserted one-to-one. Through the insertion and cooperation of the locking feet and locking holes, a stable connection between the upper shell and the lower shell is achieved. This insertion method also makes it easy to pry open the handle through the separation groove when it needs to be disassembled, which facilitates the replacement of the needle core and needle tube.

[0008] Preferably, both the upper and lower shells have symmetrically arranged separation grooves on both sides, allowing the upper and lower shells to be easily pried apart with fingers, thus enabling quick disassembly and assembly of the handle and improving usage efficiency.

[0009] Preferably, the handle has grip rings on both sides for finger insertion, which allows fingers to be easily inserted and firmly gripped, thus maintaining better control and stability during biopsy.

[0010] Preferably, the upper shell has a raised rib inside, and two positioning blocks are slidably connected to the outside of the raised rib. The positioning blocks are respectively set in the corresponding embedding groove. The raised rib and the positioning blocks provide guidance and positioning for the sliding of the movable block inside the handle, ensuring the stability and accuracy of the sliding of the movable block. At the same time, the cooperation between the positioning block and the embedding groove also allows the assembly head to be firmly fixed on the movable block, preventing the assembly head from falling off during operation.

[0011] Preferably, one end of the pressing rod is fixedly connected to a pressing plate, which allows a finger to be placed on the pressing plate and appropriate pressure to drive the pressing rod and the movable block to slide.

[0012] Preferably, the surface of the pressing pad is provided with equidistant raised strips, which increases the friction between the fingers and the pressing pad, making it easier to hold the pressing pad more stably during operation and preventing slippage.

[0013] Beneficial effects: In the above technical solution, the disposable biopsy needle provided by this utility model allows the operator to easily control the relative position of the needle core and the needle tube through the strip-shaped sliding hole, the slider and the push plate, so as to realize the exposure and shielding of the sampling groove, simplifying the sampling operation process. The design of the separation groove makes it easy to pry the handle open with your fingers when it needs to be separated, which facilitates the replacement of the needle core and the needle tube for single use, effectively avoids the risk of cross-infection, and improves the flexibility and convenience of use.

[0014] The design of the pressure lever and pressure plate makes it easier for operators to press the pressure lever, pushing the needle core forward to facilitate the removal of diseased tissue and improve operational efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0017] Figure 2 This is a partial structural diagram of the handle provided in an embodiment of the present utility model;

[0018] Figure 3 A schematic diagram of the needle core structure provided for an embodiment of this utility model;

[0019] Figure 4 A schematic diagram of the upper shell structure provided for an embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram of the lower shell structure provided for an embodiment of the present utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Needle core; 2. Needle tube; 3. Handle; 31. Upper shell; 311. Clamping foot; 312. Raised rib; 32. Lower shell; 322. Clamping hole; 321. Strip-shaped sliding hole; 322. Clamping hole; 33. Separation groove; 34. Grip ring; 4. Movable block; 41. Embedded groove; 42. Sliding block; 43. Pushing piece; 5. Assembly head; 6. Pressing rod; 61. Pressing piece; 611. Raised rib; 7. Positioning block. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-5 As shown, the disposable biopsy needle provided in this embodiment of the present invention includes a needle core 1, a needle tube 2, and a handle 3. The needle core 1 is slidably inserted into the needle tube 2. The handle 3 includes an upper shell 31 and a lower shell 32, which are attached to each other and fixedly connected to form a cylindrical inner cavity. A portion of the needle core 1 and the needle tube 2 are slidably inserted into the cylindrical inner cavity. Two movable blocks 4 are slidably connected inside the cylindrical inner cavity. Each movable block 4 has an embedding groove 41 on its surface. One end of the needle core 1 and the needle tube 2 is fixedly connected to an assembly head 5, which is embedded in the embedding groove 41 of the corresponding movable block 4. One end of the handle 3 is slidably connected to a pressing rod 6, and one end of the pressing rod 6 is fixedly connected to one of the movable blocks 4. The pressing rod 6 is operated to drive the needle core 1 to slide inside the needle tube 2.

[0024] When performing the sampling operation, the assembly heads 5 corresponding to the needle core 1 and needle tube 2 need to be slid to both ends of the strip-shaped sliding hole 321 according to the instructions of the push plate 43. At this time, the needle tube 2 completely covers the sampling groove on the needle core 1 to ensure that the tissue will not be accidentally cut before being inserted into the lesion tissue. When the needle core 1 and needle tube 2 are inserted into the lesion tissue area together, the operator pulls the push plate 43 at the corresponding position of the needle tube 2 to expose the sampling groove on the needle core 1 outside the needle tube 2. During this process, the movable block 4 of the needle tube 2 will gradually move closer to and fit against the movable block 4 of the needle core 1, preparing for the next sampling operation.

[0025] Next, the operator pushes handle 3 to insert needle core 1 into the lesion tissue. During the insertion of needle core 1, the sampling groove will cut off a portion of the lesion tissue. Then, the operator pushes back the push plate 43 of needle tube 2 to reset needle tube 2 and cover the sampling groove again. At the same time, this reset action will also cut off the lesion tissue and keep it in the sampling groove. Finally, needle tube 2 and needle core 1 are removed as a whole. The operator presses the pressing rod 6 to push needle core 1 forward, exposing the sampling groove, so that the lesion tissue can be removed for subsequent examination and analysis.

[0026] The bottom of the lower shell 32 has a strip-shaped sliding hole 321. The bottom of each movable block 4 is fixedly connected to a slider 42. The slider 42 is slidably connected inside the strip-shaped sliding hole 321. The bottom of the slider 42 is fixedly connected to a push plate 43. The strip-shaped sliding hole 321 provides a sliding track for the slider 42, so that the movable block 4 can slide stably inside the handle 3. The design of the push plate 43 allows the operator to directly control the movement of the movable block 4 through external operation, thereby controlling the relative position of the needle core 1 and the needle tube 2, realizing the exposure and concealment of the sampling groove, and providing convenience for the sampling operation.

[0027] The lower shell 32 has equidistant locking holes 322 on both sides, and the upper shell 31 has equidistant locking feet 311 on both sides. The locking feet 311 and the locking holes 322 are aligned and inserted one by one. The upper shell 31 and the lower shell 32 are tightly connected through the locking feet 311 and the locking holes 322. When the user needs to disassemble, he / she can simply pry open the upper shell 31 and the lower shell 32 to easily remove the needle core 1 and the needle tube 2 for replacement. The needle core 1 and the needle tube 2 are designed for single use, while the handle 3 can be recycled and reused.

[0028] The upper shell 31 and the lower shell 32 are symmetrically provided with separation grooves 33 on both sides, which makes it easy to pry the upper shell 31 and the lower shell 32 apart with your fingers, thus realizing the quick disassembly and assembly of the handle 3.

[0029] Both sides of the handle 3 are provided with grip rings 34 for finger insertion, which makes gripping the handle 3 more comfortable and stable, reduces hand fatigue, and improves the accuracy and stability of operation.

[0030] The upper shell 31 has a protruding rib 312 inside, and two positioning blocks 7 are slidably connected to the outside of the protruding rib 312. The positioning blocks 7 are respectively set in the corresponding embedding grooves 41, which ensures the stability and accuracy of the sliding of the movable block 4. At the same time, the cooperation between the positioning blocks 7 and the embedding grooves 41 also enables the assembly head 5 to be firmly fixed on the movable block 4, preventing the assembly head 5 from falling off during operation.

[0031] One end of the pressing rod 6 is fixedly connected to the pressing plate 61, which increases the operating area of ​​the pressing rod 6, making it easier for the operator to press the pressing rod 6, drive the needle core 1 forward, expose the sampling groove, and facilitate the removal of diseased tissue.

[0032] The surface of the pressing plate 61 is provided with equidistant protrusions 611, which increases the friction of the pressing plate 61 surface. This allows the operator to more stably control the force and direction when pressing the pressing plate 61, preventing operational errors caused by slipping or insufficient force.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A disposable biopsy needle comprising a needle core (1), a needle tube (2) and a handle (3), the needle core (1) being slidably inserted inside the needle tube (2), characterized in that: The handle (3) comprises an upper shell (31) and a lower shell (32), the upper shell (31) and the lower shell (32) are attached to each other and fixedly connected, together forming a cylindrical cavity, the needle core (1) and part of the needle tube (2) are slidingly inserted into the cylindrical cavity, two movable blocks (4) are slidingly connected inside the cylindrical cavity, the movable blocks (4) are all provided with embedding grooves (41) on the surfaces, the needle core (1) and the needle tube (2) are both fixedly connected with assembly heads (5), the assembly heads (5) are respectively embedded in the embedding grooves (41) of the corresponding movable blocks (4), one end of the handle (3) is slidingly connected with a pressing rod (6), one end of the pressing rod (6) is fixedly connected with one of the movable blocks (4), and the needle core (1) is driven to slide in the needle tube (2) by operating the pressing rod (6).

2. The single-use biopsy needle of claim 1, wherein: The bottom of the lower shell (32) is provided with a strip-shaped sliding hole (321), the bottom of the movable block (4) is fixedly connected with a sliding block (42), the sliding block (42) is slidingly connected inside the strip-shaped sliding hole (321), and the bottom of the sliding block (42) is fixedly connected with a pushing piece (43).

3. The single-use biopsy needle of claim 1, wherein: The two sides of the lower shell (32) are provided with clamping holes (322) at equal intervals, the two sides of the upper shell (31) are provided with clamping feet (311) at equal intervals, and the clamping feet (311) are one-to-one matched with the clamping holes (322).

4. The single-use biopsy needle of claim 3, wherein: The two sides of the upper shell (31) and the lower shell (32) are both symmetrically provided with separation grooves (33).

5. The single-use biopsy needle of claim 1, wherein: The two sides of the handle (3) are both provided with gripping rings (34) for fingers to insert.

6. The single-use biopsy needle of claim 1, wherein: The inside of the upper shell (31) is provided with convex ribs (312), the outer sides of the convex ribs (312) are slidingly connected with two positioning blocks (7), and the positioning blocks (7) are respectively arranged inside the corresponding embedding grooves (41).

7. The single-use biopsy needle of claim 1, wherein: One end of the pressing rod (6) is fixedly connected with a pressing piece (61).

8. The single-use biopsy needle of claim 7, wherein: The surface of the pressing piece (61) is provided with convex strips (611) at equal intervals.

Images