Coaxial puncture needle with side hole drainage

Abstract

The coaxial puncture needle with the side hole drainage function comprises a metal needle sheath and a metal needle core coaxially arranged in the metal needle sheath in a penetrating mode, and further comprises a drainage assembly arranged on the metal needle sheath in a sleeving mode. The metal needle sheath comprises a hollow tube body and a needle sheath needle seat arranged at the tail end of the hollow tube body, and at least one drainage side hole is formed in the side wall of the hollow tube body; the drainage assembly comprises a drainage main pipe arranged on the outer side of the drainage side hole in a sleeving mode and a drainage side pipe communicated with the drainage main pipe. One end of the drainage side tube is correspondingly communicated with the drainage side hole of the metal needle sheath, and the other end of the drainage side tube is communicated with the drainage bottle. Compared with the prior art, the coaxial puncture needle can avoid blood accumulation and blockage of the needle sheath caused by bleeding during repeated puncture biopsy, and can also avoid the problem of blood drop splashing caused by repeated puncture of the puncture needle.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a coaxial puncture needle with a side hole for drainage. Background Art

[0002] Core needle biopsy is widely used in liver, kidney, thyroid, breast, lymph node and other tissues and organs, which can realize the pathological diagnosis and molecular typing of the disease and guide clinical decision-making, including surgical indications, chemotherapy, targeted therapy and efficacy evaluation. When performing this type of puncture biopsy, a coaxial puncture needle is often used to assist in achieving precise positioning, avoiding damage caused by repeated punctures, and avoiding tumor implantation and metastasis through the needle tract.

[0003] For tumors with rich blood supply and situations that require repeated punctures to obtain samples, such as pathological diagnosis of lymphoma coarse needle puncture typing and prostate puncture pathological diagnosis, sometimes more than 6-12 punctures are required to obtain sufficient tissue specimens. At this time, when using traditional coaxial puncture needles, blood will reflux into the needle sheath due to bleeding during the operation and cannot be discharged in time, which may cause blood accumulation and blockage in the needle sheath. At the same time, when the puncture needle is stimulated in the blood-accumulated needle sheath, the rapid movement and friction of the puncture needle will increase the risk of blood droplet splashing, affect the surgical operation, and may even cause contamination to patients, medical staff and surgical facilities, increasing the risk of medical exposure.

[0004] Therefore, it is urgent to design a coaxial puncture needle with drainage function suitable for core needle puncture biopsy to avoid the situation where blood accumulation and blockage in the needle sheath occur during core needle puncture biopsy. Summary of the invention

[0005] The purpose of the present invention is to provide a coaxial puncture needle with a side hole for drainage in order to overcome the defect of the existing coaxial puncture needle that the needle sheath is easily blocked by blood accumulation.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A coaxial puncture needle with side hole drainage, comprising a metal needle sheath and a metal needle core coaxially arranged in the metal needle sheath, and also comprising a drainage component sleeved on the metal needle sheath;

[0008] The metal needle sheath comprises a hollow tube body and a needle sheath needle seat arranged at the rear end of the hollow tube body, and at least one drainage side hole is opened on the side wall of the hollow tube body;

[0009] The drainage assembly includes a drainage main pipe sleeved outside the drainage side hole and a drainage side pipe connected to the drainage main pipe; one end of the drainage side pipe is connected to the drainage side hole of the metal needle sheath, and the other end is connected to the drainage bottle.

[0010] Furthermore, the cross-section of the opening at the head end of the hollow tube is circular.

[0011] Furthermore, the metal needle core comprises a needle core body and a needle core needle seat arranged at the rear end of the needle core body.

[0012] Furthermore, the needle core body can be inserted into the metal needle sheath, and the needle tip of the needle core body can extend from the head end of the metal needle sheath.

[0013] Furthermore, the needle core and needle seat are provided with an external thread section, and the needle sheath and needle seat are provided with an internal thread that matches the thread of the needle core and needle seat.

[0014] Furthermore, the needle tip is in the shape of an inverted pyramid, and the length of the needle tip is 2.8-3.2 mm.

[0015] Furthermore, there are three drainage side holes in total, and the three drainage side holes are located on the same side of the hollow tube body, and the cross-sectional centers of the drainage side holes are located on the same straight line.

[0016] Furthermore, the drainage side hole is arranged at a distance of 10-20 mm from the needle sheath needle seat;

[0017] Furthermore, the diameter of the drainage side hole is 1.4-1.8 mm.

[0018] Furthermore, the center distance between adjacent drainage side holes is 1.5-2.5 mm.

[0019] Furthermore, three drainage side tubes are provided, and the tail ends of the three drainage side tubes are commonly connected to the drainage bottle.

[0020] Furthermore, the main drainage tube and the side drainage tube are vertically arranged and integrally formed.

[0021] Furthermore, the volume of the drainage bottle is 40-50 mL.

[0022] Furthermore, sealing members, preferably rubber sealing rings, are provided at the connection points between the two ends of the drainage main pipe and the metal needle sheath.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The coaxial puncture needle of the present invention is cleverly provided with a drainage assembly on the metal needle sheath, which can avoid blood accumulation and blockage of the needle sheath due to bleeding when the coaxial puncture needle is repeatedly punctured for biopsy, thereby improving the puncture efficiency; at the same time, it can also avoid the problem of blood droplets splashing due to repeated punctures by the puncture needle.

[0025] (2) The coaxial puncture needle of the present invention can effectively draw out the blood in the needle sheath by opening a drainage side hole on the metal needle sheath and finally introducing the blood into the drainage bottle through the connection of the drainage main tube and the side tube, thereby improving the efficiency and safety of core needle biopsy.

[0026] (3) The coaxial puncture needle of the present invention is simple and practical. Through the design of the drainage main tube and the side tube, the needle can be directly inserted into the corresponding drainage side hole position. Rubber rings can be provided at both ends to increase air tightness without the need for a complex fixing device design. The needle can also be easily disassembled and disposed of after the puncture is completed.

[0027] (4) The coaxial puncture needle of the present invention can effectively prevent blood accumulation and blockage in the needle sheath, thereby improving puncture efficiency and shortening operation time; and can avoid blood overflow from the tail of the needle sheath, which may cause blood droplets to splash during repeated punctures, thereby reducing the risk of contamination and medical exposure to patients, medical staff and surgical facilities.

[0028] (5) The drainage main tube of the present invention can rotate around the metal needle sheath, so when it is necessary to inject drugs into the sheath, the drainage main tube is rotated 180 degrees around the needle sheath to close the drainage side hole and stop drainage without affecting drug injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the structure of the coaxial puncture needle of Example 1 of the present invention.

[0030] Figure 2 Schematic diagram of the matching relationship between the metal needle sheath and the metal needle core of Example 2 of the present invention.

[0031] Figure 3 This is a schematic diagram of the structure of the metal needle sheath of Example 2 of the present invention.

[0032] Figure 4 This is a schematic diagram of the structure of the metal needle core of Example 2 of the present invention.

[0033] Figure 5 This is a schematic diagram of the structure of the drainage component of Example 3 of the present invention.

[0034] Figure 6 Schematic diagram of the structure of the coaxial puncture needle of Example 4 of the present invention.

[0035] Figure 7 This is a schematic diagram of a seal according to Example 4 of the present invention.

[0036] Description of the markings in the figure:

[0037] 1-Metal needle sheath, 11-Hollow tube body, 12-Needle sheath needle seat, 13-Drainage side hole;

[0038] 2-metal needle core, 21-needle core body, 211-needle tip, 22-needle core needle seat;

[0039] 3-drainage assembly, 31-drainage main tube, 32-drainage side tube, 33-drainage bottle;

[0040] 4- Seals. DETAILED DESCRIPTION

[0041] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0042] In the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] Embodiment 1:

[0045] A coaxial puncture needle with side hole drainage comprises a metal needle sheath 1 and a metal needle core 2 coaxially arranged in the metal needle sheath 1, and also comprises a drainage component 3 sleeved on the metal needle sheath 1.

[0046] The metal needle sheath 1 and the metal needle core 2 together constitute the coaxial puncture needle body. The metal needle sheath 1 includes a hollow tube body 11 and a needle sheath needle seat 12 arranged at the rear end of the hollow tube body 11. At least one drainage side hole 13 is opened on the side wall of the hollow tube body 11.

[0047] The drainage assembly 3 includes a drainage main tube 31 sleeved outside the drainage side hole 13 and a drainage side tube 32 connected to the drainage main tube 31. One end of the drainage side tube 32 is connected to the drainage side hole 13 of the metal needle sheath 1, and the other end is connected to the drainage bottle 33.

[0048] Embodiment 2:

[0049] A coaxial puncture needle with side hole drainage comprises a metal needle sheath 1 and a metal needle core 2 coaxially arranged in the metal needle sheath 1, and also comprises a drainage component 3 sleeved on the metal needle sheath 1.

[0050] The difference from Example 1 is that the hollow tube body 11 of this embodiment is 15G thick, and the cross-section of the opening at the head end of the hollow tube body 11 is circular. The metal needle core 2 includes a needle core body 21 and a needle core needle seat 22 arranged at the tail end of the needle core body 21. The needle core body 21 can be inserted into the metal needle sheath 1, and the needle tip 211 of the needle core body 21 can extend from the head end of the metal needle sheath 1. The needle core needle seat 22 is provided with an external thread section, and the needle sheath needle seat 12 is provided with an internal thread that matches the thread of the needle core needle seat 22. The needle tip 211 is in the shape of an inverted pyramid, and the length of the needle tip 211 is 2.8-3.2mm.

[0051] Embodiment 3:

[0052] A coaxial puncture needle with side hole drainage comprises a metal needle sheath 1 and a metal needle core 2 coaxially arranged in the metal needle sheath 1, and also comprises a drainage component 3 sleeved on the metal needle sheath 1.

[0053] The difference from Example 2 is that this embodiment has three drainage side holes 13, which are located on the same side of the hollow tube 11 and the cross-sectional centers of the drainage side holes 13 are located on the same straight line. The drainage side holes 13 are arranged in sequence at a distance of about 10-20 mm from the needle sheath needle seat 12, the diameter of the drainage side holes 13 is 1.4-1.8 mm, and the distance between the centers of adjacent drainage side holes 13 is 1.5-2.5 mm.

[0054] In this embodiment, three drainage side tubes 32 are provided, and the tail ends of the three drainage side tubes 32 are connected to the drainage bottle 33. The drainage main tube 31 and the drainage side tube 32 are vertically arranged and integrally formed. The volume of the drainage bottle 33 is 40-50mL.

[0055] The two ends of the drainage main pipe 31 of this embodiment are connected to the metal needle sheath 1 with sealing members 4, and the sealing members can be selected from common rubber gaskets to increase the sealing of the drainage and prevent blood from seeping out from the two ends of the drainage main pipe 31. In addition, the drainage main pipe 31 of this embodiment can rotate around the metal needle sheath 1. If it is necessary to inject medicine into the metal needle sheath 1 under special circumstances, the drainage main pipe 31 can be rotated 180° around the metal needle sheath 1, thereby closing the drainage side hole 13 and stopping the drainage without affecting the drug injection.

[0056] Embodiment 4:

[0057] This embodiment provides a coaxial puncture needle with side hole drainage, which is mainly composed of a coaxial puncture needle body and a drainage component 3.

[0058] The coaxial puncture needle body is used to guide puncture positioning, and the puncture needle body is composed of an outer metal needle sheath 1 and an internal metal needle core 2. The metal needle sheath 1 is a hollow metal round tube with a total length of 55mm and a thickness of 15G. The opening cross-section at the head end is circular, and the tail end is equipped with a plastic needle sheath needle seat 12. The metal needle core 2 is a metal rod with a total length of 58mm and a thickness of 16G. The head end is an inverted pyramid-shaped needle tip 211, the needle tip 211 is 3mm long, and the tail end is equipped with a plastic needle core needle seat 22. The metal needle core 2 can be inserted into the metal needle sheath 1 and the needle tip 211 of 3mm at the head end is exposed. The needle core needle seat 22 and the needle sheath needle seat 12 can be tightened and fixed by thread matching. When the metal needle core 2 is withdrawn after puncturing to the target position, the metal needle sheath 1 is retained, which is convenient for inserting the puncture biopsy needle along the metal needle sheath 1, and repeated puncture biopsy sampling can be performed.

[0059] Three drainage side holes 13 are arranged in sequence at the range of 10-20 mm at the tail of the metal needle sheath 1. The drainage side holes 13 are all circular holes with a diameter of 1.8 mm, and the adjacent drainage side holes 13 are separated by 2 mm. The three drainage side holes 13 are located on one side of the metal needle sheath 1, and the cross-sectional centers of the drainage side holes 13 are located on the same straight line. When the metal needle sheath 1 is used, the side with the drainage side holes 13 is kept at an angle downward relative to the horizontal plane to facilitate drainage.

[0060] The drainage assembly of this embodiment is composed of a drainage main pipe 31 and three drainage side pipes 32, and the drainage main pipe 31 is vertically connected to the drainage side pipe 32 and is integrally formed. The drainage main pipe 31 and the drainage side pipe 32 are made of plastic hollow hoses, and the inner diameters are both 1.8 mm. The drainage main pipe 31 can be directly mounted on the metal needle sheath 1 and fixed, and the drainage main pipe 31 is 15 mm long. Three drainage side pipes 32 are respectively connected to the drainage main pipe 31, and the opening spacing between adjacent drainage side pipes 32 is 2 mm. The cross-sectional center of the drainage side pipe 32 is located on the same straight line, and the opening of the drainage side pipe 32 corresponds one by one to the drainage side hole 13 of the metal needle sheath 1. The ends of the three drainage side pipes 32 converge and are connected to a plastic drainage bottle 33, and the capacity of the drainage bottle 33 is 50 ml.

[0061] In this embodiment, a sealing member 4 is sleeved at the connection between the drainage main pipe 31 and the metal needle sheath 1. The sealing member 4 is a rubber gasket, which is sleeved at both ends of the drainage main pipe 31 respectively, so as to increase the drainage sealing performance.

[0062] The specific method of using the coaxial puncture needle of this embodiment is as follows:

[0063] (1) Before puncture: Disinfect the puncture site and surrounding skin, apply local infiltration anesthesia, and check that all joints of the coaxial puncture needle are fixed intact and airtight.

[0064] (2) During puncture: perform coaxial puncture needle puncture to the target position under image guidance. Unscrew the needle core needle seat 22 of the metal needle core 2 and the needle sheath needle seat 12 at the tail end of the metal needle sheath 1, and pull out the metal needle core 2. A 16G thick needle puncture biopsy needle is inserted into the metal needle sheath 1 to perform routine repeated puncture biopsy. During the puncture process, bleeding at the puncture site can be drained into the drainage bottle 33 through the drainage side hole 13 and the drainage side tube 32, thereby avoiding blood accumulation and blockage of the metal needle sheath 1, and reducing the risk of blood splashing when the puncture needle is stimulated due to blood overflowing from the tail end of the metal needle sheath 1.

[0065] If it is necessary to inject drugs into the metal needle sheath 1 under special circumstances, such as gelatin sponge particles for hemostasis, the drainage main tube 31 can be rotated 180° around the metal needle sheath 1 to close the drainage side hole 13 and stop drainage without affecting drug injection.

[0066] (3) After puncture: When puncture is completed, the metal needle sheath 1 is first pulled out, and then the drainage main tube 31 is removed. The metal needle sheath 1 and the metal needle core 2 are discarded into the sharps box, and the drainage assembly 3 is discarded into the medical waste bag. The puncture site is disinfected, bandaged, and pressed to stop bleeding, and the operation is closed.

[0067] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A coaxial puncture needle with side hole drainage, comprising a metal needle sheath (1) and a metal needle core (2) coaxially arranged in the metal needle sheath (1), characterized in that: It also includes a drainage assembly (3) sleeved on the metal needle sheath (1); The metal needle sheath (1) comprises a hollow tube body (11) and a needle sheath needle seat (12) arranged at the rear end of the hollow tube body (11); at least one drainage side hole (13) is opened on the side wall of the hollow tube body (11); The drainage assembly (3) comprises a drainage main pipe (31) sleeved on the outside of the drainage side hole (13) and a drainage side pipe (32) connected to the drainage main pipe (31); one end of the drainage side pipe (32) is correspondingly connected to the drainage side hole (13) of the metal needle sheath (1), and the other end is connected to the drainage bottle (33).

2. A coaxial puncture needle with side hole drainage according to claim 1, characterized in that: The cross section of the opening at the head end of the hollow tube (11) is circular.

3. A coaxial puncture needle with side hole drainage according to claim 1, characterized in that: The metal needle core (2) comprises a needle core body (21) and a needle core needle seat (22) arranged at the rear end of the needle core body (21); The needle core body (21) can be inserted into the metal needle sheath (1), and the needle tip (211) of the needle core body (21) can extend from the head end of the metal needle sheath (1).

4. A coaxial puncture needle with side hole drainage according to claim 3, characterized in that: The needle core needle seat (22) is provided with an external thread section, and the needle sheath needle seat (12) is provided with an internal thread that matches the thread of the needle core needle seat (22).

5. A coaxial puncture needle with side hole drainage according to claim 3, characterized in that: The needle tip (211) is in the shape of an inverted pyramid, and the length of the needle tip (211) is 2.8-3.2 mm.

6. A coaxial puncture needle with side hole drainage according to claim 1, characterized in that: There are three drainage side holes (13) in total. The three drainage side holes (13) are located on the same side of the hollow tube body (11), and the cross-sectional centers of the drainage side holes (13) are located on the same straight line.

7. A coaxial puncture needle with side hole drainage according to claim 6, characterized in that: The drainage side hole (13) is arranged at a distance of 10-20 mm from the needle sheath needle seat (12); The diameter of the drainage side holes (13) is 1.4-1.8 mm, and the distance between the centers of adjacent drainage side holes (13) is 1.5-2.5 mm.

8. The coaxial puncture needle with side hole drainage according to claim 6, characterized in that: The drainage side tubes (32) are provided with three corresponding ones, and the tail ends of the three drainage side tubes (32) are connected to the drainage bottle (33); The drainage main pipe (31) and the drainage side pipe (32) are vertically arranged and integrally formed.

9. The coaxial puncture needle with side hole drainage according to claim 1, characterized in that: The volume of the drainage bottle (33) is 40-50 mL.

10. The coaxial puncture needle with side hole drainage according to claim 1, characterized in that: Sealing members (4) are sleeved at the connection points between the two ends of the drainage main pipe (31) and the metal needle sheath (1).

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