Coaxial puncture needle with side hole drainage
By setting drainage side holes and drainage components on the coaxial puncture needle, the problems of blood accumulation and blockage in the needle sheath and blood splattering are solved, achieving efficient and safe puncture operation.
Patent Information
- Application Number
- CN202423028044.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Traditional coaxial puncture needles are prone to causing blood accumulation and blockage in the needle sheath during core needle biopsy, affecting the safety and efficiency of the procedure and posing a risk of blood splatter.
Design a coaxial puncture needle with side hole drainage, including a metal needle sheath and a metal needle core. The needle sheath is provided with a drainage side hole and equipped with a drainage component to facilitate blood drainage. It is connected to a drainage bottle through a main drainage tube and a side tube.
It effectively avoids blood accumulation and blockage in the needle sheath, improves puncture efficiency, reduces blood splashing, enhances surgical safety and efficiency, and reduces the risk of medical exposure.
Smart Images
Figure CN223759826U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a coaxial puncture needle with side hole drainage. Background Technology
[0002] Core needle biopsy is widely used in various tissues and organs, including the liver, kidneys, thyroid gland, breast, and lymph nodes. It enables pathological diagnosis and molecular subtyping of diseases, guiding clinical decisions such as surgical indications, chemotherapy, targeted therapy, and efficacy evaluation. During this type of biopsy, a coaxial needle is often used to achieve precise positioning, avoid damage caused by repeated punctures, and prevent tumor metastasis via the needle tract.
[0003] For tumors with rich blood supply and cases requiring repeated punctures for biopsy, such as core needle biopsy for lymphoma typing and prostate biopsy, sometimes 6-12 or more punctures are needed to obtain sufficient tissue specimens. In such cases, with traditional coaxial puncture needles, bleeding during the procedure can cause blood to flow back into the needle sheath and not drain in time, potentially leading to blood accumulation and blockage in the sheath. Furthermore, when the puncture needle is activated within the blood-filled sheath, rapid movement and friction increase the risk of blood splatter, affecting the surgical procedure and potentially contaminating the patient, medical staff, and surgical equipment, increasing the risk of medical exposure.
[0004] Therefore, there is an urgent need to design a coaxial puncture needle with drainage function suitable for core needle biopsy, in order to avoid the situation where blood easily accumulates and blocks the needle sheath during core needle biopsy. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of existing coaxial puncture needles, which easily lead to blood accumulation and blockage in the needle sheath, and to provide a coaxial puncture needle with a side hole for drainage.
[0006] The objective of this utility model can be achieved through the following technical solutions:
[0007] A coaxial puncture needle with side hole drainage includes a metal needle sheath and a metal needle core coaxially disposed within the metal needle sheath, and also includes a drainage assembly sleeved on the metal needle sheath.
[0008] The metal needle sheath includes a hollow tube and a needle sheath seat located at the tail end of the hollow tube. At least one drainage side hole is provided on the side wall of the hollow tube.
[0009] The drainage assembly includes a main drainage tube sleeved outside the drainage side hole and a drainage side tube communicating with the main drainage tube; one end of the drainage side tube 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 includes a needle core body and a needle core seat located at the tail end of the needle core body.
[0012] Furthermore, the needle core body can be inserted into a 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 mates with the thread of the needle core and needle seat.
[0014] Furthermore, the needle tip is inverted pyramidal in shape, and the length of the needle tip is 2.8-3.2 mm.
[0015] Furthermore, there are three drainage side holes, which are located on the same side of the hollow tube and the center of the cross-section of the drainage side holes are on the same straight line.
[0016] Furthermore, the drainage side hole is located 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-to-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 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, both ends of the drainage tube are fitted with sealing elements at the connection points with the metal needle sheath, preferably rubber sealing rings.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] (1) The coaxial puncture needle of this utility model has a drainage component cleverly set on the metal needle sheath, which can avoid blood accumulation and blockage in the needle sheath due to bleeding when the coaxial puncture needle is repeatedly punctured for biopsy, thus improving the puncture efficiency; at the same time, it can also avoid the problem of blood droplet splashing due to repeated puncture of the puncture needle.
[0025] (2) The coaxial puncture needle of this utility model can effectively draw out the blood in the needle sheath by opening a drainage side hole on the metal needle sheath and finally guiding it into the drainage bottle through the connection of the main drainage tube and the side tube, thereby improving the efficiency and safety of core needle biopsy.
[0026] (3) The coaxial puncture needle of this utility model is simple and practical. Through the design of the main drainage tube and the side tube, it can be directly inserted into the corresponding drainage side hole position. Rubber rings can be provided at both ends to increase airtightness, without the need for a complicated fixing device design. It is also easy to disassemble and dispose of when the puncture is finished.
[0027] (4) The coaxial puncture needle of this utility model can effectively prevent blood accumulation and blockage in the needle sheath, thereby improving puncture efficiency and shortening operation time; and can avoid blood overflow at the tail of the needle sheath, which would 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 tube of this utility model can rotate around the metal needle sheath, so that when it is necessary to inject drugs into the sheath, the drainage tube can be rotated 180° around the needle sheath to close the drainage side hole, stop the drainage, and not affect the drug injection. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the coaxial puncture needle in Embodiment 1 of this utility model.
[0030] Figure 2 This is a schematic diagram showing the cooperation relationship between the metal needle sheath and the metal needle core in Embodiment 2 of this utility model.
[0031] Figure 3 This is a schematic diagram of the structure of the metal needle sheath in Embodiment 2 of this utility model.
[0032] Figure 4 This is a schematic diagram of the metal needle core of Embodiment 2 of this utility model.
[0033] Figure 5 This is a schematic diagram of the drainage component in Embodiment 3 of this utility model.
[0034] Figure 6 This is a schematic diagram of the coaxial puncture needle in Embodiment 4 of this utility model.
[0035] Figure 7 This is a schematic diagram of the sealing element in Embodiment 4 of this utility model.
[0036] Explanation of markings in the diagram:
[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 seat;
[0039] 3-Drainage assembly, 31-Main drainage tube, 32-Side drainage tube, 33-Drainage bottle;
[0040] 4-Seals. Detailed Implementation
[0041] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.
[0042] In this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, 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; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0044] Example 1:
[0045] A coaxial puncture needle with side hole drainage includes a metal needle sheath 1 and a metal needle core 2 coaxially disposed inside the metal needle sheath 1, and also includes 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 body of the coaxial puncture needle. The metal needle sheath 1 includes a hollow tube 11 and a needle sheath seat 12 located at the tail end of the hollow tube 11. At least one drainage side hole 13 is provided on the side wall of the hollow tube 11.
[0047] The drainage assembly 3 includes a main drainage tube 31 sleeved outside the drainage side hole 13 and a drainage side tube 32 connected to the main drainage 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] Example 2:
[0049] A coaxial puncture needle with side hole drainage includes a metal needle sheath 1 and a metal needle core 2 coaxially disposed inside the metal needle sheath 1, and also includes a drainage component 3 sleeved on the metal needle sheath 1.
[0050] The difference from Embodiment 1 is that the hollow tube 11 in this embodiment has a diameter of 15G, and the opening section at the head end of the hollow tube 11 is circular. The metal needle core 2 includes a needle core body 21 and a needle core seat 22 located 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 seat 22 has an external thread section, and the needle sheath seat 12 has an internal thread that engages with the threaded part of the needle core seat 22. The needle tip 211 is inverted pyramidal in shape, and the length of the needle tip 211 is 2.8-3.2mm.
[0051] Example 3:
[0052] A coaxial puncture needle with side hole drainage includes a metal needle sheath 1 and a metal needle core 2 coaxially disposed inside the metal needle sheath 1, and also includes a drainage component 3 sleeved on the metal needle sheath 1.
[0053] The difference from Embodiment 2 is that this embodiment has three drainage side holes 13. The three drainage side holes 13 are located on the same side of the hollow tube body 11, and the centers of the cross-sections of the drainage side holes 13 are on the same straight line. The drainage side holes 13 are arranged sequentially 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 center distance between 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 main drainage tube 31 is vertically arranged and integrally formed with the drainage side tubes 32. The volume of the drainage bottle 33 is 40-50mL.
[0055] In this embodiment, both ends of the drainage tube 31 are fitted with sealing elements 4 at the connection points with the metal needle sheath 1. Commonly used rubber gaskets can be used for the sealing elements to increase the sealing performance of the drainage and prevent blood from seeping out from both ends of the drainage tube 31. In addition, the drainage tube 31 in this embodiment can rotate around the metal needle sheath 1. If it is necessary to inject medication into the metal needle sheath 1 in special circumstances, the drainage tube 31 can be rotated 180° around the metal needle sheath 1 to close the drainage side hole 13, stop the drainage, and not affect the medication injection.
[0056] Example 4:
[0057] This embodiment provides a coaxial puncture needle with side hole drainage, which mainly consists of a coaxial puncture needle body and a drainage component 3.
[0058] The coaxial puncture needle body is used to guide the puncture positioning. The puncture needle body consists of an outer metal needle sheath 1 and an inner metal needle core 2. The metal needle sheath 1 is a hollow metal tube, 55mm in total length and 15G in diameter, with a circular opening at the tip and a plastic needle sheath seat 12 at the tail end. The metal needle core 2 is a metal rod, 58mm in total length and 16G in diameter, with an inverted pyramidal needle tip 211 3mm long at the tip, and a plastic needle core seat 22 at the tail end. The metal needle core 2 can be inserted into the metal needle sheath 1, with the 3mm tip 211 protruding. The needle core seat 22 and the needle sheath seat 12 can be tightened together via threads. After puncturing to the target position, the metal needle core 2 is withdrawn, leaving the metal needle sheath 1 intact. This facilitates the insertion of the biopsy needle along the metal needle sheath 1, allowing for repeated puncture biopsies.
[0059] Three drainage side holes 13 are arranged sequentially within a 10-20mm range at the tail end of the metal needle sheath 1. Each drainage side hole 13 is a circular hole with a diameter of 1.8mm, and adjacent drainage side holes 13 are spaced 2mm apart. The three drainage side holes 13 are located on one side of the metal needle sheath 1, and the centers of their cross-sections are on the same straight line. When using the metal needle sheath 1, the side with the drainage side holes 13 should be held downwards at an angle relative to the horizontal plane to facilitate drainage.
[0060] The drainage assembly in this embodiment consists of a main drainage tube 31 and three side drainage tubes 32, which are vertically connected and integrally formed. Both the main drainage tube 31 and the side drainage tubes 32 are made of hollow plastic tubing with an inner diameter of 1.8 mm. The main drainage tube 31, 15 mm long, can be directly fitted onto the metal needle sheath 1 for fixation. Three side drainage tubes 32 are connected to the main drainage tube 31, with a 2 mm gap between the openings of adjacent side drainage tubes 32. The centers of the cross-sections of the side drainage tubes 32 are aligned on the same straight line, and the openings of the side drainage tubes 32 correspond one-to-one with the drainage side holes 13 of the metal needle sheath 1. The ends of the three side drainage tubes 32 converge and connect to a plastic drainage bottle 33 with a capacity of 50 ml.
[0061] In this embodiment, a sealing element 4 is provided at the connection between the drainage tube 31 and the metal needle sheath 1. The sealing element 4 is a rubber gasket, which is respectively fitted on both ends of the drainage tube 31 to increase the drainage sealing effect.
[0062] The specific method of using the coaxial puncture needle in this embodiment is as follows:
[0063] (1) Before puncture: Disinfect and drape the puncture site and surrounding skin, administer local infiltration anesthesia, and check that all connections of the coaxial puncture needle are properly fixed and airtight.
[0064] (2) During puncture: Under image guidance, the coaxial puncture needle is inserted to the target location. Loosen the needle core seat 22 of the metal needle core 2 from the needle sheath seat 12 at the tail end of the metal needle sheath 1, and remove the metal needle core 2. A 16G thick-bore biopsy needle can be inserted along the metal needle sheath 1 for routine repeated puncture biopsies. During the puncture, bleeding from 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 in the metal needle sheath 1 and reducing the risk of blood splashing when the puncture needle is activated due to blood overflowing from the tail end of the metal needle sheath 1.
[0065] If it is necessary to inject medication into the metal needle sheath 1 in special circumstances, such as hemostatic gelatin sponge particles, the drainage tube 31 can be rotated 180° around the metal needle sheath 1 to close the drainage side hole 13, stop drainage, and not affect the medication injection.
[0066] (3) After puncture: When the puncture is completed, first remove the metal needle sheath 1, then remove the drainage tube 31. Dispose of the metal needle sheath 1 and metal needle core 2 into the sharps container, and dispose of the drainage component 3 into the medical waste bag. Disinfect and bandage the puncture site and apply pressure to stop bleeding. The procedure is closed.
[0067] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.
Claims
1. A coaxial puncture needle with side hole drainage, comprising a metal needle sheath (1) and a metal needle core (2) coaxially penetrating in the metal needle sheath (1), characterized in that, The drainage assembly (3) is 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 tail end of the hollow tube body (11), and at least one drainage side hole (13) is arranged on the side wall of the hollow tube body (11); The drainage assembly (3) comprises a drainage main pipe (31) sleeved outside the drainage side hole (13) and a drainage side pipe (32) in communication with the drainage main pipe (31); one end of the drainage side pipe (32) is in communication with the drainage side hole (13) of the metal needle sheath (1), and the other end is in communication with a drainage bottle (33).
2. The coaxial puncture needle with side hole drainage according to claim 1, characterized in that, The head end opening section of the hollow tube body (11) is circular.
3. The 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 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 protrude from the head end of the metal needle sheath (1).
4. The 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 matched with the needle core needle seat (22).
5. The 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 2.8-3.2mm.
6. The coaxial puncture needle with side hole drainage according to claim 1, characterized in that, The three drainage side holes (13) are arranged on the same side of the hollow tube body (11) and the centers of the cross sections of the drainage side holes (13) are located on the same straight line.
7. The 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 10-20mm from the needle sheath needle seat (12); The diameter of the drainage side hole (13) is 1.4-1.8mm, and the center distance of adjacent drainage side holes (13) is 1.5-2.5mm.
8. The coaxial puncture needle with side hole drainage according to claim 6, characterized in that, The three drainage side pipes (32) are correspondingly arranged, and the tail ends of the three drainage side pipes (32) are in communication with the drainage bottle (33); The drainage main pipe (31) and the drainage side pipe (32) are arranged perpendicularly 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 40-50mL.
10. The coaxial puncture needle with side hole drainage according to claim 1, characterized in that, The two ends of the drainage main pipe (31) are sleeved with sealing members (4) at the connection positions with the metal needle sheath (1).