Multipurpose biopsy needle

Abstract

The utility model provides a multipurpose biopsy needle which comprises an inner needle, an outer needle is sleeved on the outer side of the inner needle, the inner needle and the outer needle are both of a cylindrical structure with one closed end and the other open end, an outer opening is formed in the side wall, close to the closed end, of the outer needle, an inner opening is formed in the side wall, close to the closed end, of the inner needle, and the outer opening corresponds to the inner opening. A blade is arranged on the outer opening and arranged in the length direction of the outer needle, the blade plane of the blade is arranged outwards, and the closed end of the outer needle is a smooth blunt end. The outer opening is formed in the outer needle, the inner opening is formed in the inner needle, the blade is arranged on the outer opening, and the outer opening rotates relative to the inner opening for cutting, so that target tissue can be cut and sampled, mechanical damage to the target tissue is small, sampling can be carried out in the front direction, the rear direction, the left direction and the right direction of the same target spot, and the sampling efficiency is improved. Compared with other biopsy needles, more tissues can be obtained on the same target spot, and the biopsy needle is suitable for soft tissues and hard tissues and belongs to the technical field of medical instruments.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a multi-purpose biopsy needle. Background Art

[0002] A biopsy needle is a medical device used to take tissue samples from a patient's body for pathological examination, and is usually used for purposes such as taking biopsy samples and aspirating cells of conical tumors and unknown tumors in various organs such as the kidney, liver, lung, breast, thyroid, prostate, pancreas, testis, uterus, and ovary. The commonly used biopsy needle in the early stage was a spiral biopsy needle, which was provided with a spiral blade and rotated on the target tissue to achieve the purpose of spiral sampling. However, the tip of the spiral biopsy needle is a sharp tip, which will cause damage to tissues or blood vessels during sampling, and the safety is relatively low.

[0003] Patent CN210541648U discloses a safe and efficient rotary biopsy needle. By setting an inner needle tube, an outer needle tube, and a second notch and a first notch opened on the inner needle tube and the outer needle tube, when in use, the inner needle tube is inserted into the outer needle tube, and the inner needle tube is rotated to make the first notch completely coincide with the second notch. Then, the biopsy needle is placed at the site where biopsy is needed, and the tissue is pressed into the inner needle tube from the second notch by sucking with a syringe or relying on the pressure of the tissue itself. Then, the inner needle tube is rotated, and the tissue will be cut off under the action of the shearing force formed between the inner needle tube and the outer needle tube. Then, the inner needle tube is pulled outwards, and the tissue is taken out. However, this patent does not provide a blade on the notch, and it relies on the shearing force between the inner needle tube and the outer needle tube to cut the target tissue. Therefore, it has a good sampling effect on soft tissues, but is not suitable for hard tissues. In addition, this patent cuts the target tissue by rotating the inner needle tube, and the cutting volume is limited, and multiple samplings may be required, resulting in a poor sampling effect. Therefore, a new type of biopsy needle needs to be designed. Summary of the Utility Model

[0004] The purpose of this application is to provide a multi-purpose biopsy needle, aiming to solve the technical problems of the existing biopsy needles, such as low safety, poor sampling effect, and inapplicability to hard tissues.

[0005] The embodiment of this application provides a multi-purpose biopsy needle, which includes an inner needle. An outer needle is sleeved outside the inner needle. Both the inner needle and the outer needle are tubular structures with one end closed and the other end open. An outer opening is provided on the side wall of the outer needle near its closed end, and an inner opening is provided on the side wall of the inner needle near its closed end. The outer opening and the inner opening are correspondingly arranged. A blade is provided on the outer opening. The blade is arranged along the length direction of the outer needle, and the cutting plane of the blade faces outwards. The closed end of the outer needle is a smooth blunt head.

[0006] In one embodiment, an inner needle seat is provided at the open end of the inner needle, and an outer needle seat is provided at the open end of the outer needle. Both the inner needle seat and the outer needle seat are hollow. A fixing platform is provided on the inner needle, and the fixing platform is located inside the inner needle seat. A fixing groove is provided inside the outer needle seat, and the fixing platform is inserted into the fixing groove and is tightly connected to the fixing groove.

[0007] In one embodiment, the fixing platform includes a first fixing platform and a second fixing platform. The first fixing platform is close to the inner needle seat. An annular groove is provided between the first fixing platform and the second fixing platform, and an O-ring is provided on the annular groove. The fixing groove includes a first fixing groove and a second fixing groove. The first fixing groove is close to the inner needle seat. The first fixing platform is inserted into the first fixing groove, and the second fixing platform is inserted into the second fixing groove.

[0008] In one embodiment, both the first fixing platform and the first fixing groove are arranged in a cylindrical shape, and both the second fixing platform and the second fixing groove are arranged in a frustum shape.

[0009] In one embodiment, both the inner needle and the outer needle are arranged in a hollow cylindrical shape.

[0010] In one embodiment, both the outer opening and the inner opening are arranged in a rectangular or rounded rectangular shape. The number of blades is two, and they are symmetrically arranged on the upper and lower sides of the outer opening.

[0011] In one embodiment, the blunt head is arranged in a semi-circular shape.

[0012] In one embodiment, scale marks are provided on the outer wall of the outer needle.

[0013] In one embodiment, the scale marks are annular scale lines.

[0014] In one embodiment, anti-slip patterns are provided on the outer walls of both the inner needle seat and the outer needle seat.

[0015] The present utility model provides a multi-purpose biopsy needle. When sampling, the inner needle is inserted into the outer needle, and the outer opening and the inner opening are cross-closed. Then, the biopsy needle is placed at the target tissue, and the outer needle is rotated so that the outer opening and the inner opening completely overlap. At this time, the center of the opening is placed at the biopsy target point, and the other end of the inner needle is connected to a syringe for negative pressure aspiration to suck the target tissue into the outer opening and the inner opening. By rotating the outer needle in the reverse direction, the target tissue can be cut and sampled.

[0016] Compared with the prior art, its beneficial effects are as follows: By providing an outer opening on the outer needle, an inner opening on the inner needle, and a blade on the outer opening, and by rotating and cutting the outer opening relative to the inner opening, the present utility model can achieve cutting and sampling of the target tissue, with less mechanical damage to the target tissue, and can sample in four different directions of front, back, left, and right at the same target point, obtaining more tissue at the same target point than other biopsy needles. In addition, the present utility model is applicable to both soft tissues and hard tissues, with good sampling effect and wide application range. Moreover, the present utility model can also be used for operations such as compressing and observing the target point, aspiration, irrigation, and injecting drugs, with wide uses; by setting the closed end of the outer needle as a smooth blunt head, the present utility model can avoid damage to tissues, blood vessels, nerves, etc. caused by sharp tips, improving safety. The present utility model has a simple structure, is easy to operate, has less mechanical damage, a wide application range, wide uses, high safety, and high practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 FIG. is a schematic structural diagram of a multi-purpose biopsy needle provided by an embodiment of the present application;

[0019] Figure 2 is Figure 1 an enlarged schematic structural diagram of part A of the multi-purpose biopsy needle shown;

[0020] Figure 3 is Figure 1 a combined schematic structural diagram of the multi-purpose biopsy needle shown;

[0021] Figure 4 is Figure 1 a schematic structural diagram of the outer needle of the multi-purpose biopsy needle shown;

[0022] Figure 5 is Figure 4 an enlarged schematic structural diagram of part B of the outer needle of the multi-purpose biopsy needle shown;

[0023] Figure 6 is Figure 4 a sectional structural diagram of the outer needle of the multi-purpose biopsy needle shown along A-A;

[0024] Figure 7 is Figure 1 a schematic structural diagram of the inner needle of the multi-purpose biopsy needle shown;

[0025] Figure 8 for Figure 7 The schematic diagram of the enlarged structure of the inner needle of the multi-purpose biopsy needle shown is at position C;

[0026] Figure 9 for Figure 7 The BB cross-sectional structure schematic diagram of the inner needle of the multi-purpose biopsy needle is shown.

[0027] Explanation of symbols in the figure:

[0028] 1. Outer needle; 2. Outer needle seat; 3. Inner needle; 4. Inner needle seat; 5. O-ring; 6. Fixing platform; 601. First fixing platform; 602. Second fixing platform; 603. Annular groove; 7. Fixing groove; 701. First fixing groove; 702. Second fixing groove; 8. Outer opening; 801. Blade; 9. Inner opening; 10. Scale mark; 11. Anti-slip pattern. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that when an element is referred to as being "fixed" or "set" to another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] See also Figure 1 , is a schematic diagram of the structure of a multi-purpose biopsy needle provided in an embodiment of the present application. For the sake of convenience, only the parts related to the present embodiment are shown, which are described in detail as follows:

[0033] In one embodiment, please combine Figures 2 - 9, A multi-purpose biopsy needle, including an inner needle 3, an outer needle 1 is sleeved outside the inner needle 3, the inner needle 3 and the outer needle 1 can slide and rotate relative to each other, both the inner needle 3 and the outer needle 1 are tubular structures with one end closed and the other end open, an outer opening 8 is provided on the side wall of the outer needle 1 near its closed end, an inner opening 9 is provided on the side wall of the inner needle 3 near its closed end, the outer opening 8 and the inner opening 9 are arranged correspondingly, and by rotating the outer needle 1, the outer opening 8 and the inner opening 9 can be in a cross-closed or completely overlapped state. A blade 801 is provided on the outer opening 8, the blade 801 is arranged along the length direction of the outer needle 1 and the blade plane of the blade 801 faces outward, and the closed end of the outer needle 1 is a smooth blunt head.

[0034] During sampling, insert the inner needle 3 into the outer needle 1, and the outer opening 8 and the inner opening 9 are cross-closed, then place the biopsy needle at the target tissue, rotate the outer needle 1 to make the outer opening 8 and the inner opening 9 completely overlap, at this time place the center of the opening at the biopsy target point, connect a syringe to the other end of the inner needle 3 for negative pressure aspiration, suck the target tissue into the outer opening 8 and the inner opening 9, and rotate the outer needle 1 in the reverse direction to cut and sample the target tissue.

[0035] In the present utility model, by providing an outer opening 8 on the outer needle 1, an inner opening 9 on the inner needle 3, and a blade 801 on the outer opening 8, and rotating the outer opening 8 relative to the inner opening 9 for cutting, the cutting and sampling of the target tissue can be realized, the mechanical damage to the target tissue is small, and sampling can be performed in four different directions of front, back, left, and right at the same target point, obtaining more tissue at the same target point than other biopsy needles; in addition, the present utility model is applicable to both soft tissues and hard tissues, with good sampling effect and wide application range; furthermore, the present utility model can also be used for operations such as compressing and observing the target point, aspiration, flushing, injecting drugs, etc., with wide uses; by setting the closed end of the outer needle 1 as a smooth blunt head, the present utility model can avoid damage to tissues, blood vessels or nerves caused by sharp tips, improving safety.

[0036] Specifically, please refer to Figure 4 and Figure 7 , both the inner needle 3 and the outer needle 1 are set as hollow cylindrical shapes, such a setting helps to reduce the frictional resistance between the biopsy needle and the tissue, making the insertion and extraction of the biopsy needle smoother.

[0037] Please refer to Figure 4 and Figure 5 , the smooth blunt head of the outer needle 1 is set as a semi-circular shape, which is round, smooth and has no edges and corners, and will not cause damage to tissues, blood vessels or nerves, etc., with high safety.

[0038] In one embodiment, please refer to Figure 5 and Figure 8, both the outer opening 8 and the inner opening 9 are set as rectangles or rounded rectangles, so that the opening of the biopsy needle is more easily aligned with the target tissue, reducing the operation difficulty and error.

[0039] In one embodiment, please refer to Figure 5 , the number of the blade edges 801 is two, and they are symmetrically arranged on the upper and lower sides of the outer opening 8, so that no matter the outer needle 1 rotates forward or backward, the target tissue can be rotationally cut.

[0040] In one embodiment, please refer to Figure 3 and Figure 4 , a scale mark 10 is provided on the outer wall of the outer needle 1, which is convenient for grasping the sampling depth and improves the sampling accuracy.

[0041] In one embodiment, please refer to Figure 3 and Figure 4 , the scale mark 10 is a circular scale line, so that no matter how the biopsy needle rotates, the scale line can be seen. The scale line can be engraved by the method of laser superficial etching, which is safe and not easy to fade.

[0042] In one embodiment, please refer to Figure 4 and Figure 7 , the materials of the inner needle 3 and the outer needle 1 are metals, which can be medical-grade stainless steel or other materials, as long as they have good biocompatibility and will not cause adverse reactions to the patient's tissue. The metal material has high hardness and toughness, which can ensure that the biopsy needle maintains a stable shape during the rotational cutting sampling process.

[0043] In one embodiment, please refer to Figures 4 - 9 , an inner needle seat 4 is provided at the open end of the inner needle 3, and an outer needle seat 2 is provided at the open end of the outer needle 1. Both the inner needle seat 4 and the outer needle seat 2 are hollow; a fixing platform 6 is provided on the inner needle 3, the fixing platform 6 is located inside the inner needle seat 4, a fixing groove 7 is provided inside the outer needle seat 2, and the fixing platform 6 is inserted into the fixing groove 7 and is tightly connected with the fixing groove 7. The cooperation of the fixing platform 6 and the fixing groove 7 realizes the connection between the inner needle 3 and the outer needle 1, avoiding the separation of the inner needle 3 and the outer needle 1 during the sampling process, which affects the sampling effect and sampling efficiency. In addition, the design of the fixing platform 6 and the fixing groove 7 is beneficial to the assembly and disassembly of the biopsy needle, and the operation is convenient.

[0044] Specifically, please refer to Figure 3 and Figures 6 - 7, the fixed stage 6 includes a first fixed stage 601 and a second fixed stage 602. The first fixed stage 601 is close to the inner needle seat 4. There is an annular groove 603 between the first fixed stage 601 and the second fixed stage 602, and an O-ring 5 is provided on the annular groove 603; the fixed groove 7 includes a first fixed groove 701 and a second fixed groove 702. The first fixed groove 701 is close to the inner needle seat 4. The first fixed stage 601 is inserted into the first fixed groove 701, and the second fixed stage 602 is inserted into the second fixed groove 702. The O-ring 5 can improve the tight connection between the inner needle 3 and the outer needle 1, and helps to reduce loosening or displacement caused by vibration or external force during the sampling process.

[0045] Please refer to Figures 6 - 7 , both the first fixed stage 601 and the first fixed groove 701 are arranged in a cylindrical shape, and both the second fixed stage 602 and the second fixed groove 702 are arranged in a frustum shape. The frustum shape design has a guiding property, enabling the second fixed stage 602 to more easily find the correct position and direction when inserted into the second fixed groove 702, which helps to simplify the installation process and reduce assembly errors.

[0046] In one embodiment, please refer to Figure 4 and Figure 7 , anti-slip patterns 11 are provided on the outer walls of the inner needle seat 4 and the outer needle seat 2, which can increase the friction between the fingers and the inner needle seat 4 and the outer needle seat 2, enabling medical staff to more stably hold the inner needle seat 4 and rotate the outer needle seat 2 during the operation, and reducing the occurrence of operation errors or accidents caused by slippery hands.

[0047] The following combines Figures 1 - 9 , and describes the working process of a multi-purpose biopsy needle of the present application as follows:

[0048] During sampling, the inner needle 3 is inserted into the outer needle 1, and the outer opening 8 and the inner opening 9 are cross-closed. Then, the biopsy needle is placed at the target tissue, and the outer needle 1 is rotated so that the outer opening 8 and the inner opening 9 completely overlap. At this time, the center of the opening is placed at the biopsy target point, and the inner needle seat 4 is connected to a syringe for negative pressure aspiration to suck the target tissue into the outer opening 8 and the inner opening 9. By rotating the outer needle 1 in the reverse direction, the target tissue can be cut and sampled.

[0049] After sampling, the inner needle 3 is slowly pulled out while keeping the inner needle 3 rotating to avoid tissue breakage. The tissue block sample located in the inner needle 3 is transferred to a collection container. At the same time, the outer opening 8 of the outer needle 1 is placed on the target point for compression observation to stop bleeding at the sampling site. If necessary, coagulation can be injected through the outer needle 1 for hemostasis, or a slender hemostatic gauze can be pushed to the target point with the inner needle 3 for compression hemostasis.

[0050] The biopsy needle can also be used for operations such as compression observation, aspiration, flushing, and drug injection of the target point.

[0051] In summary, the present utility model provides a multi-purpose biopsy needle. When sampling, the inner needle is inserted into the outer needle, and the outer opening and the inner opening are cross-closed. Then, the biopsy needle is placed at the target tissue, and the outer needle is rotated to make the outer opening and the inner opening completely overlap. At this time, the center of the opening is placed at the biopsy target point, and the other end of the inner needle is connected to a syringe for negative pressure aspiration to suck the target tissue into the outer opening and the inner opening. By rotating the outer needle in the reverse direction, the target tissue can be cut and sampled.

[0052] The present utility model realizes the cutting and sampling of the target tissue by providing an outer opening on the outer needle, an inner opening on the inner needle, and a blade on the outer opening, and rotating and cutting the outer opening relative to the inner opening. The mechanical damage to the target tissue is small, and sampling can be performed in four different directions, namely, front, back, left, and right, at the same target point, obtaining more tissue at the same target point than other biopsy needles. In addition, the present utility model is applicable to both soft tissues and hard tissues, with good sampling effects and a wide range of applications. Moreover, the present utility model can also be used for operations such as compressing and observing the target point, aspiration, flushing, and injecting drugs, with a wide range of uses. By setting the closed end of the outer needle as a smooth blunt head, the present utility model can avoid damage to tissues, blood vessels, or nerves caused by sharp tips, improving safety. The present utility model has a simple structure, is easy to operate, causes little mechanical damage, has a wide range of applications, a wide range of uses, high safety, and high practicality, and can be widely applied to the technical field of medical devices.

[0053] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A multi-purpose biopsy needle, comprising an inner needle (3), an outer needle (1) is sleeved outside the inner needle (3), both the inner needle (3) and the outer needle (1) are cylindrical structures with one end closed and the other end open, an outer opening (8) is provided on the side wall of the outer needle (1) near its closed end, an inner opening (9) is provided on the side wall of the inner needle (3) near its closed end, the outer opening (8) is arranged corresponding to the inner opening (9), and it is characterized in that, The outer opening (8) is provided with a blade (801). The blade (801) is arranged along the length direction of the outer needle (1), and the blade plane of the blade (801) faces outward. The closed end of the outer needle (1) is a smooth blunt head.

2. The multi-purpose biopsy needle according to claim 1, characterized in that, The open end of the inner needle (3) is provided with an inner needle seat (4), and the open end of the outer needle (1) is provided with an outer needle seat (2). Both the inner needle seat (4) and the outer needle seat (2) are hollow. A fixing platform (6) is arranged on the inner needle (3). The fixing platform (6) is located inside the inner needle seat (4). A fixing groove (7) is arranged inside the outer needle seat (2). The fixing platform (6) is inserted into the fixing groove (7) and is tightly connected with the fixing groove (7).

3. The multi-purpose biopsy needle according to claim 2, characterized in that, The fixing platform (6) includes a first fixing platform (601) and a second fixing platform (602). The first fixing platform (601) is close to the inner needle seat (4). An annular groove (603) is arranged between the first fixing platform (601) and the second fixing platform (602). An O-ring (5) is arranged on the annular groove (603). The fixing groove (7) includes a first fixing groove (701) and a second fixing groove (702). The first fixing groove (701) is close to the inner needle seat (4). The first fixing platform (601) is inserted into the first fixing groove (701), and the second fixing platform (602) is inserted into the second fixing groove (702).

4. The multi-purpose biopsy needle according to claim 3, characterized in that, Both the first fixing platform (601) and the first fixing groove (701) are arranged in a cylindrical shape, and both the second fixing platform (602) and the second fixing groove (702) are arranged in a frustum shape.

5. The multi-purpose biopsy needle according to claim 1, wherein Both the inner needle (3) and the outer needle (1) are arranged in a hollow cylindrical shape.

6. The multi-purpose biopsy needle according to claim 1, wherein, Both the outer opening (8) and the inner opening (9) are arranged in a rectangular or rounded rectangular shape. The number of the blades (801) is two, and they are symmetrically arranged on the upper and lower sides of the outer opening (8).

7. The multi-purpose biopsy needle according to claim 1, wherein The blunt head is arranged in a semi-circular shape.

8. The multi-purpose biopsy needle according to claim 1, wherein A scale mark (10) is arranged on the outer wall of the outer needle (1).

9. The multi-purpose biopsy needle according to claim 8, wherein The scale mark (10) is an annular scale line.

10. The multi-purpose biopsy needle according to claim 2, wherein, Anti-slip patterns (11) are arranged on the outer walls of both the inner needle seat (4) and the outer needle seat (2).

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