Puncture needle assembly
By designing a combination of bent syringes and replaceable pointed and blunt needle cores, the safety and accuracy of the puncture needle near the nerve roots are solved, and the puncture effect with high safety and high accuracy is achieved, avoiding patient injury.
Patent Information
- Application Number
- CN202311127644.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-04
- Publication Date
- 2025-07-25
AI Technical Summary
Existing puncture needles are prone to damage the nerve roots during the puncture process and are difficult to accurately reach the target, resulting in poor operational safety and poor injection effect.
A puncture needle assembly is designed, including a bent needle tube, a pointed needle core and a blunt needle core. The pointed needle core is used for initial puncture and a blunt needle core is used to replace when approaching the nerve root. The arc-shaped puncture end of the blunt needle core can slide through the nerve root, combining the adjustability of the needle tube to ensure the accuracy of the puncture.
It improves the safety and accuracy of puncture, avoids the physical harm of secondary puncture to the patient, and ensures the effectiveness of collagenase injection.
Smart Images
Figure CN120360653A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of medical devices, and particularly relates to a puncture needle assembly. Background Art
[0002] Collagenase chemical dissolution, also known as collagenase nucleolysis, is a minimally invasive interventional treatment method in which, under the guidance of a C-arm X-ray machine or CT, collagenase is accurately injected into and around the protruding intervertebral disc, causing the protruding intervertebral disc to dissolve and absorb, relieving the compression on the nerve root, and achieving the same effect as surgical removal of the protruding intervertebral disc. The excellent and good rate can reach more than 90%. Since this treatment method has small trauma, few complications, and reliable curative effect, it has become one of the effective minimally invasive interventional treatment methods for cervical spondylosis and lumbar disc herniation caused by intervertebral disc herniation.
[0003] In actual operation, to accurately inject collagenase into the target mainly depends on the physician using a puncture needle. However, there are important nerve roots and dural sacs in the human body around the intervertebral disc. During the puncture process of the existing puncture needle, the sharp needle tip may damage the nerve, and the operation safety is poor; and the existing puncture needle is a straight needle, and it is very difficult to avoid the nerve root and accurately reach the target during the puncture process, resulting in poor injection effect. Summary of the Invention
[0004] Therefore, the present invention provides a puncture needle assembly with high safety and capable of accurately reaching the target.
[0005] Therefore, the technical solution adopted by the present invention is as follows:
[0006] A puncture needle assembly includes: a needle tube, a sharp-point needle core, and a blunt-point needle core;
[0007] The front end of the needle tube is bent into a V shape, and a Luer female connector is connected to the rear end of the needle tube;
[0008] The sharp-point needle core is formed by sequentially connecting a conical puncture end, a sharp-point needle connecting part with a reduced diameter, and a sharp-point needle body. The rear end of the sharp-point needle body is connected to a Luer male connector A. When the sharp-point needle core is assembled into the needle tube, the conical puncture end extends out from the front end face of the needle tube, and the Luer male connector A is connected to the Luer female connector;
[0009] The blunt-point needle core is formed by sequentially connecting an arc-shaped puncture end, a blunt-point needle connecting part with a reduced diameter, and a blunt-point needle body. The rear end of the blunt-point needle body is connected to a Luer male connector B. When the blunt-point needle core is assembled into the needle tube, the arc-shaped puncture end extends out from the front end face of the needle tube, and the Luer male connector B is connected to the Luer female connector.
[0010] Further, the bending angle of the front end of the needle tube is 170-178°, and the length of the bending part is 5-10 mm.
[0011] Furthermore, the diameter of the connecting part of the sharp-tip needle is 20 - 70% of the diameter of the sharp-tip needle body; the diameter of the connecting part of the blunt-tip needle is 20 - 70% of the diameter of the blunt-tip needle body.
[0012] Furthermore, the conical puncture end of the sharp-tip needle core consists of a cylindrical connecting part with the same diameter as the sharp-tip needle body and a triangular pyramid with the same bottom diameter as the cylindrical connecting part. When the sharp-tip needle core is assembled into the needle tube, a part of the cylindrical connecting part extends out from the front end of the needle tube to connect the triangular pyramid.
[0013] Furthermore, the height of the triangular pyramid is 1.5 - 2 mm.
[0014] Furthermore, the arc-shaped puncture end of the blunt-tip needle core consists of a cylindrical connecting part with the same diameter as the blunt-tip needle body and a spherical crown with the same bottom diameter as the cylindrical connecting part. When the blunt-tip needle core is assembled into the needle tube, a part of the cylindrical connecting part extends out from the front end of the needle tube to connect the spherical crown.
[0015] Furthermore, the height of the spherical crown is 1.5 - 2 mm.
[0016] Furthermore, the needle tube is made of steel pipe, the Luer female connector is made of plastic material, and the needle tube and the Luer female connector are connected by interference fit.
[0017] Furthermore, the sharp-tip needle core is a steel needle made by one-piece manufacturing, the Luer male connector A is made of plastic material, and the sharp-tip needle core and the Luer male connector A are connected by interference fit; the blunt-tip needle core is a steel needle made by one-piece manufacturing, the Luer male connector B is made of plastic material, and the blunt-tip needle core and the Luer male connector B are connected by interference fit.
[0018] Furthermore, it further includes a plastic protective sleeve, and the plastic protective sleeve is sleeved outside the needle tube.
[0019] The beneficial effects of the present invention: The present invention includes two types of needle cores, namely sharp-tip and blunt-tip. During puncture, first assemble the sharp-tip needle core into the needle tube for puncture. During the puncture process, when the needle tip approaches dangerous parts such as nerve roots, withdraw the sharp-tip needle core and insert the blunt-tip needle core, and continue to insert the needle. Since the puncture end of the blunt-tip needle core is arc-shaped, it can slide over the nerve root surface without damaging the nerve when encountering the nerve root, thus ensuring that the puncture needle can safely pass through the dangerous area to reach the target; and the front end of the needle tube of the present invention is bent. When approaching the target, the position of the needle tip can be adjusted by rotating the needle tube to make it reach the target, avoiding secondary puncture caused by puncture position deviation of the straight needle. Therefore, the present invention is a puncture needle with high operation safety, high puncture accuracy, and can avoid physical harm to patients caused by secondary puncture. Description of the Drawings
[0020] Figure 1 It is an exploded structural schematic diagram of a puncture needle assembly of the present invention.
[0021] Figure 2It is a schematic structural diagram of the sharp-tip needle core of the present invention assembled into the needle tube.
[0022] Figure 3 It is Figure 2 a partial enlarged view of part A in
[0023] Figure 4 It is a schematic structural diagram of the blunt-tip needle core of the present invention assembled into the needle tube.
[0024] Figure 5 It is Figure 4 a partial enlarged view of part B in Specific Embodiment
[0025] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and a preferred embodiment.
[0026] Refer to Figures 1 to 5 , this embodiment provides a puncture needle assembly, including a needle tube 10, a sharp-tip needle core 20, a blunt-tip needle core 30 and a sleeve 40.
[0027] The needle tube 10 includes a steel needle tube body 11 and a plastic Luer female connector 12. The Luer female connector 12 is connected to the rear end of the needle tube body 11 by interference fit. The front end of the needle tube body 11 is bent laterally to form a V shape, and the preferred bending angle is 170-178°, and the length of the bent part is 5-10 mm. If the bending angle is too large or the length of the bent part is too long, it will be difficult to insert the needle core into the needle tube, or it will be difficult to pull out after being inserted into the needle tube; if the bending angle is too small or the length of the bent part is too short, it will not be able to adjust the position of the needle tip. For example, in this embodiment, the bending angle is 177° and the length of the bent part is 5 mm, and the total length of the needle tube body 11 is 90 mm. The length and diameter of the needle tube body 11 are the same as those of existing ordinary puncture needles. A step is provided at the front end of the Luer female connector for sleeving the sleeve 40. The sleeve 40 is an ordinary transparent plastic sleeve, which is sleeved outside the needle tube 10 to protect the needle tube and the needle core.
[0028] The sharp-tip needle core 20 is formed by sequentially connecting a conical puncture end 23, a diameter-reduced sharp-tip needle connecting portion 22, and a sharp-tip needle body 21. The conical puncture end 23, the diameter-reduced sharp-tip needle connecting portion 22, and the sharp-tip needle body 21 are integrally manufactured from stainless steel material. The rear end of the sharp-tip needle body 21 is connected to a plastic Luer male connector A24 by interference fit. The diameter of the sharp-tip needle body 21 is the same as the diameter of the existing puncture needle. The diameter of the sharp-tip needle connecting portion 22 is 20-70% of the diameter of the sharp-tip needle body. If the diameter of the sharp-tip needle connecting portion 22 is too small, the conical puncture end 23 is prone to jitter during puncture, affecting the puncture accuracy. If the diameter is too large, it is not easy to freely pass through the bent portion of the needle tube when assembled into the needle tube. The conical puncture end 23 is composed of a cylindrical connecting portion 232 with the same diameter as the sharp-tip needle body 21 and a triangular pyramid 231 with a bottom diameter the same as the diameter of the cylindrical connecting portion 232. Preferably, the height L2 of the triangular pyramid 231 is 1.5-2 mm. Within this range, the puncture force can be appropriate and the position can be controlled.
[0029] In this embodiment, the total length of the sharp-tip needle core 20 is 111 mm, and the height of the triangular pyramid 231 is 1.9 mm. When the sharp-tip needle core 20 is assembled into the needle tube 10, the Luer male connector A24 is connected to the Luer female connector 12, and a part of the cylindrical connecting portion 232 extends out from the front end of the needle tube to connect the triangular pyramid 231. Most of the cylindrical connecting portion 232 is located inside the needle tube 10, which can play a role in stabilizing the triangular pyramid 231, thereby ensuring the puncture effect and accuracy.
[0030] The blunt-tip needle core 30 is formed by sequentially connecting an arc-shaped puncture end 33, a diameter-reduced blunt-tip needle connecting portion 32, and a blunt-tip needle body 31. The arc-shaped puncture end 33, the diameter-reduced blunt-tip needle connecting portion 32, and the blunt-tip needle body 31 are integrally manufactured from stainless steel material. The rear end of the blunt-tip needle body 31 is connected to a plastic Luer male connector B34 by interference fit. The diameter of the blunt-tip needle body 31 is the same as the diameter of the existing puncture needle. The diameter of the blunt-tip needle connecting portion 32 is 20-70% of the diameter of the blunt-tip needle body 31. The blunt-tip needle connecting portion 32 is composed of a cylindrical connecting portion 332 with the same diameter as the blunt-tip needle body 31 and a spherical crown 331 with a bottom diameter the same as the diameter of the cylindrical connecting portion 3232. Preferably, the height L1 of the spherical crown 331 is 1.5-2 mm.
[0031] In this embodiment, the total length of the blunt-tip needle core 30 is 111 mm, and the height of the spherical crown 331 is 0.6 mm. When the blunt-tip needle core 30 is assembled into the needle tube 10, the Luer male connector B34 is connected to the Luer female connector 12, and a part of the cylindrical connecting portion 332 extends out from the front end of the needle tube to connect the spherical crown 331. Most of the cylindrical connecting portion 3232 is located inside the needle tube 10, which can play a role in stabilizing the spherical crown 331, thereby ensuring the puncture effect and accuracy.
[0032] When the present invention is used:
[0033] First, assemble the pointed stylet 20 into the needle tube 10, and perform puncture under the guidance of a C-arm X-ray machine or a CT. During the puncture, when the needle tip approaches dangerous parts such as nerve roots, withdraw the pointed stylet 20 and insert the blunt stylet 30, then continue to insert the needle. When the arc-shaped puncture end 33 of the blunt stylet 30 reaches the target position, withdraw the blunt stylet 30, connect a syringe, and inject collagenase into the target through the needle tube 10.
[0034] In addition, during the puncture, if it is found that the puncture needle deviates from the target direction, the needle tube can be rotated to adjust the needle insertion direction so that the needle tube finally reaches the target.
[0035] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also within the protection scope of the present invention.
Claims
1. A puncture needle assembly, characterized in that, Comprising: A syringe barrel, a sharp-pointed needle core and a blunt-pointed needle core; The front end of the syringe barrel is bent into a V shape, and a Luer female connector is connected to the rear end of the syringe barrel; The sharp-pointed needle core is formed by sequentially connecting a conical puncture end, a sharp-pointed needle connecting portion with a reduced diameter, and a sharp-pointed needle body. The rear end of the sharp-pointed needle body is connected to a Luer male connector A. When the sharp-pointed needle core is assembled into the syringe barrel, the conical puncture end extends out from the front end face of the syringe barrel, and the Luer male connector A is connected to the Luer female connector; The blunt-pointed needle core is formed by sequentially connecting an arc-shaped puncture end, a blunt-pointed needle connecting portion with a reduced diameter, and a blunt-pointed needle body. The rear end of the blunt-pointed needle body is connected to a Luer male connector B. When the blunt-pointed needle core is assembled into the syringe barrel, the arc-shaped puncture end extends out from the front end face of the syringe barrel, and the Luer male connector B is connected to the Luer female connector.
2. The puncture needle assembly according to claim 1, wherein, The bending angle of the front end of the syringe barrel is 170 - 178°, and the length of the bending portion is 5 - 10 mm.
3. The puncture needle assembly according to claim 2, wherein The diameter of the sharp-pointed needle connecting portion is 20 - 70% of the diameter of the sharp-pointed needle body; the diameter of the blunt-pointed needle connecting portion is 20 - 70% of the diameter of the blunt-pointed needle body.
4. The puncture needle assembly according to claim 3, wherein, The conical puncture end of the sharp-pointed needle core is composed of a cylindrical connecting portion with the same diameter as the sharp-pointed needle body and a triangular pyramid with a bottom diameter the same as that of the cylindrical connecting portion. When the sharp-pointed needle core is assembled into the syringe barrel, a part of the cylindrical connecting portion extends out from the front end of the syringe barrel to connect the triangular pyramid.
5. The puncture needle assembly according to claim 4, characterized in that, The height of the triangular pyramid is 1.5 - 2 mm.
6. The puncture needle assembly according to claim 3, characterized in that, The arc-shaped puncture end of the blunt-pointed needle core is composed of a cylindrical connecting portion with the same diameter as the blunt-pointed needle body and a spherical crown with a bottom diameter the same as that of the cylindrical connecting portion. When the blunt-pointed needle core is assembled into the syringe barrel, a part of the cylindrical connecting portion extends out from the front end of the syringe barrel to connect the spherical crown.
7. The puncture needle assembly according to claim 6, wherein, The height of the spherical crown is 1.5 - 2 mm.
8. A puncture needle assembly according to claim 1, characterized in that, The syringe barrel is made of steel pipe, the Luer female connector is made of plastic material, and the syringe barrel and the Luer female connector are connected by interference fit.
9. A puncture needle assembly according to claim 1, wherein, The sharp-pointed needle core is a steel needle manufactured integrally, the Luer male connector A is made of plastic material, and the sharp-pointed needle core and the Luer male connector A are connected by interference fit; the blunt-pointed needle core is a steel needle manufactured integrally, the Luer male connector B is made of plastic material, and the blunt-pointed needle core and the Luer male connector B are connected by interference fit.
10. The puncture needle assembly according to claim 1, characterized in that, It further includes a plastic protective sleeve, and the plastic protective sleeve is sleeved outside the syringe barrel.