Replaceable needle head
By designing a replaceable needle structure with a restraint plate and adjustment cap, the stability and adjustability issues of traditional bone marrow biopsy needles have been resolved, achieving greater puncture stability and flexibility while reducing patient harm.
Patent Information
- Application Number
- CN202422501680.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-10-16
AI Technical Summary
Traditional bone marrow biopsy needles are less stable during puncture, which can easily cause secondary damage to patients, and they are also difficult to adjust and use.
A replaceable needle was designed, which is fixed by a restraint plate, the puncture depth is adjusted by an adjustment cap, and the needle core is replaceable. The threaded connection between the handle and the fixing seat achieves stability and flexibility.
It improves the stability of the needle, reduces the possibility of secondary injury, and allows for adjustment of puncture depth and replacement of the needle core as needed, meeting the needs of bone marrow puncture at different locations.
Smart Images
Figure CN223541939U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bone marrow biopsy needles, and more particularly to a replaceable needle. Background Technology
[0002] Bone marrow biopsy needles are medical devices used for biopsies and cell aspiration from various organs, primarily for bone marrow biopsies. Traditional bone marrow biopsy needles have poor stability during puncture, easily causing secondary injury to the patient. Furthermore, some needles are difficult to adjust. This paper proposes a replaceable needle tip. A restraint plate secures the needle during puncture, and the puncture depth can be adjusted by rotating the adjustment cap. The needle tip can also be replaced by removing the core, meeting the needs of bone marrow puncture at different locations. Utility Model Content
[0003] The present invention proposes a replacement needle that solves the existing problems.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A replaceable needle includes a needle tube with a needle core sleeved inside. One end of the needle core is fixedly mounted with a handle, and the handle has a first thread on its side. A fixing seat is mounted on one end of the needle tube, and a fixing thread groove is formed inside the side of the fixing seat. A fixing block is fixedly sleeved on one side of the needle tube, and a connecting thread is wound around the outside of the fixing block. A fixing sleeve is sleeved on the outside of the fixing block, and a fixing thread groove is formed inside the fixing sleeve. A restraining plate is mounted on one end of the fixing sleeve, and an adjusting cap is provided on the other end of the fixing sleeve.
[0006] Preferably, the syringe has an injection scale on its side, and the injection connector has a second thread wrapped around its outer side. A fixing plate is installed on the other side of the syringe, and a rubber piston is provided inside the syringe. A push rod is connected to one side of the rubber piston, and an operating push plate is provided on one side of the push rod.
[0007] Preferably, the first thread matches the shape and size of the fixed thread groove, and the fixed seat engages with the handle threadedly.
[0008] Preferably, the second thread matches the shape and size of the fixed thread groove, and the fixed seat engages with the injection connector threadedly.
[0009] Preferably, one end of the needle core is provided with a puncture head, and the puncture head has a certain angle, and the needle core penetrates through the inside of the needle tube.
[0010] Preferably, the injection scale is evenly distributed on the outside of the syringe, and the shape and size of the rubber piston match the inside of the syringe, with the fixing plates symmetrically arranged on both sides of the syringe.
[0011] Preferably, the shape and size of the connecting thread and the connecting thread groove are matched, and the fixed sleeve and the fixed block are threadedly engaged.
[0012] Preferably, a syringe is installed on one side of the needle tube, and an injection connector is provided on one side of the syringe.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. The handle is threaded to the fixing base. The needle core can be removed and replaced by rotating the handle. The handle makes it easy to pull the needle core out of the needle tube. The injection connector is threaded to the fixing base. When extracting bone marrow fluid, the injection connector is rotated and fixed to the fixing base accordingly.
[0015] 2. The restraint plate is used to contact the skin during puncture, improve the stability of the needle, reduce the possibility of secondary injury, and the puncture head has a certain angle to facilitate puncture of the bone.
[0016] 3. The fixed sleeve rotates with the adjusting cap. By rotating the adjusting cap, the fixed sleeve moves outside the fixed block to adjust the puncture depth.
[0017] 4. The syringe is made of a transparent material, making it easy to observe. The rubber piston moves by moving the pusher. The rubber piston moves inside the syringe and corresponds to the injection scale, making it easy for the user to read the amount of spinal fluid extracted.
[0018] In summary, the structure of this invention can better solve the problems of poor stability of traditional bone marrow biopsy needles during puncture, which can easily cause secondary damage to patients, and the difficulty in adjusting and using other bone marrow biopsy needles. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the biopsy needle structure of this utility model;
[0020] Figure 2 This is a cross-sectional view of the biopsy needle structure of this utility model;
[0021] Figure 3 This is a schematic diagram of the disassembled needle core structure of this utility model;
[0022] Figure 4 This is a schematic diagram of the disassembly structure of the fixing sleeve of this utility model;
[0023] Figure 5This is a schematic diagram of the syringe structure of this utility model.
[0024] Labels in the diagram: 1. Needle tube; 2. Needle core; 3. Puncture head; 4. Handle; 5. First thread; 6. Fixing seat; 7. Fixing thread groove; 8. Fixing block; 9. Connecting thread; 10. Fixing sleeve; 11. Connecting thread groove; 12. Restraint plate; 13. Adjusting cap; 14. Syringe; 15. Injection scale; 16. Injection connector; 17. Second thread; 18. Fixing plate; 19. Rubber piston; 20. Push rod; 21. Operating push plate. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0026] Reference Figures 1-5 A replaceable needle includes a needle tube 1 and a syringe 14. A needle core 2 is fitted inside the needle tube 1. One end of the needle core 2 has a puncture head 3 at a certain angle to facilitate bone puncture. The needle core 2 extends through the needle tube 1, and a handle 4 is fixedly installed at one end of the needle core 2. The handle 4 facilitates the removal of the needle core 2 from the needle tube 1. A first thread 5 is provided on the side of the handle 4. A fixing seat 6 is installed at one end of the needle tube 1. A fixing thread groove 7 is formed inside the side of the fixing seat 6. A fixing block 8 is fixedly fitted on one side of the needle tube 1. A connecting thread 9 is wound around the outside of the fixing block 8. The connecting thread 9 matches the shape and size of the connecting thread groove 11. The cylinder 10 is threadedly engaged with the fixing block 8. By rotating the adjusting cap 13, the fixing sleeve 10 can be moved outside the fixing block 8 to adjust the puncture depth. The fixing sleeve 10 is sleeved on the outside of the fixing block 8. The fixing sleeve 10 has a fixing thread groove 7 inside. A restraint plate 12 is installed at one end of the fixing sleeve 10. The restraint plate 12 is used to contact the skin during puncture to improve the stability of the needle tube 1 and reduce the possibility of secondary injury. An adjusting cap 13 is provided at the other end of the fixing sleeve 10. The fixing sleeve 10 rotates with the adjusting cap 13. A syringe 14 is installed on one side of the needle tube 1, and an injection connector 16 is provided on one side of the syringe 14.
[0027] Reference Figure 5The syringe 14 has an injection scale 15 on its side. The syringe 14 is made of a transparent material for easy observation. The injection connector 16 has a second thread 17 wrapped around its outer side. A fixing plate 18 is installed on the other side of the syringe 14. A rubber piston 19 is installed inside the syringe 14. The position of the rubber piston 19 corresponds to the injection scale 15, making it easy for the user to read the amount of spinal fluid extracted. A push rod 20 is connected to one side of the rubber piston 19, and an operating push plate 21 is provided on one side of the push rod 20. Moving the operating push plate 21 moves the rubber piston 19.
[0028] Reference Figure 3 and Figure 5 The first thread 5 matches the shape and size of the fixed thread groove 7, and the fixed seat 6 is threadedly engaged with the handle 4. The second thread 17 matches the shape and size of the fixed thread groove 7, and the fixed seat 6 is threadedly engaged with the injection connector 16. The handle 4 and the injection connector 16 are both threadedly connected to the fixed seat 6. The needle core 2 can be removed and replaced by rotating the handle 4. When extracting bone marrow fluid, the injection connector 16 is correspondingly rotated and fixed on the fixed seat 6. The injection scale 15 is evenly opened on the outside of the syringe 14, and the shape and size of the rubber piston 19 matches the inside of the syringe 14. The rubber piston 19 moves inside the syringe 14 to achieve the purpose of extracting bone marrow fluid. The fixing plate 18 is symmetrically arranged on both sides of the syringe 14. The fixing plate 18 is combined with the operating push plate 21 to facilitate the user to push and pull the rubber piston 19.
[0029] Working principle: First, during use, the needle core 2 is fitted into the needle tube 1. The handle 4 is fixed inside the fixing base 6 by rotating it. The adjusting cap 13 is rotated to make the distance between the restraint plate 12 and the puncture head 3 meet the puncture requirements. The needle tube 1 is pushed so that the puncture head 3 punctures the bone. After puncture, the restraint plate 12 contacts the puncture surface to improve the stability of the needle tube 1. Then, the handle 4 is rotated to remove the needle core 2. The injection connector 16 is installed in the fixing base 6 to fix the syringe 14. By pulling out the operating pusher 21, the bone marrow fluid is drawn out following the movement of the rubber piston 19. After observing that the bone marrow fluid reaches the corresponding injection mark 15, the injection connector 16 is rotated to remove the syringe 14. Then, the needle tube 1 is taken out to complete the process of extracting bone marrow fluid. When the needle needs to be replaced, the handle 4 is rotated to remove the needle core 2. After replacing the needle core 2, the handle 4 is installed in the fixing base 6.
[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A replaceable needle, comprising a needle tube (1), characterized in that, The needle tube (1) is fitted with a needle core (2) inside, and a handle (4) is fixedly installed at one end of the needle core (2). A first thread (5) is provided on the side of the handle (4), and a fixing seat (6) is installed at one end of the needle tube (1). A fixing thread groove (7) is opened inside the side of the fixing seat (6), and a fixing block (8) is fixedly fitted on one side of the needle tube (1). A connecting thread (9) is wound around the outside of the fixing block (8), and a fixing sleeve (10) is fitted on the outside of the fixing block (8). A fixing thread groove (7) is opened inside the fixing sleeve (10), and a restraint plate (12) is installed at one end of the fixing sleeve (10). An adjustment cap (13) is provided at the other end of the fixing sleeve (10).
2. A replaceable needle according to claim 1, characterized in that, A syringe (14) is installed on one side of the needle tube (1), an injection connector (16) is provided on one side of the syringe (14), an injection scale (15) is provided on the side of the syringe (14), and a second thread (17) is wound around the outside of the injection connector (16). A fixing plate (18) is installed on the other side of the syringe (14), and a rubber piston (19) is provided inside the syringe (14). A push rod (20) is connected to one side of the rubber piston (19), and an operating push plate (21) is provided on one side of the push rod (20).
3. A replaceable needle according to claim 1, characterized in that, The first thread (5) matches the shape and size of the fixed thread groove (7), and the fixed seat (6) is threadedly engaged with the handle (4).
4. A replaceable needle according to claim 2, characterized in that, The second thread (17) matches the shape and size of the fixed thread groove (7), and the fixed seat (6) is threadedly engaged with the injection connector (16).
5. A replaceable needle according to claim 1, characterized in that, The needle core (2) has a puncture head (3) at one end, and the needle core (2) penetrates the inside of the needle tube (1).
6. A replaceable needle according to claim 2, characterized in that, The injection scale (15) is evenly distributed on the outside of the syringe (14), and the shape and size of the rubber piston (19) match the inside of the syringe (14). The fixing plate (18) is symmetrically arranged on both sides of the syringe (14).
7. A replaceable needle according to claim 1, characterized in that, The connecting thread (9) and the connecting thread groove (11) are matched in shape and size, and the fixed sleeve (10) and the fixed block (8) are threadedly engaged.