Magnetic navigation needle made of magnetisable material

Abstract

A magnetic navigation needle made of magnetisable materials comprises a needle sleeve assembly and a needle core assembly detachably connected with the needle sleeve assembly. The needle sleeve assembly comprises a handle, a mounting through hole formed in the handle and a needle sleeve arranged at one end of the handle. The needle core assembly comprises a needle seat and a magnetized needle core fixedly arranged on the needle seat. The magnetized needle core comprises a core body made of magnetisable materials and a functional layer wrapping the outer side of the core body. The functional layer is used for reducing the friction coefficient of the core body, preventing the core body from being corroded and prolonging the service life of the core body. The core body is made of magnetisable materials, and when the navigation needle is produced, the core body is magnetized once, so that the magnetized needle core has magnetism for a long time and does not need to be magnetized in the operation process.

Description

Technical Field

[0001] The utility model relates to the field of magnetic navigation needles, in particular to a magnetic navigation needle made of magnetizable material. Background Art

[0002] A navigation puncture needle is a special medical device, which is commonly used by medical staff in puncture treatment, anesthesia treatment, or other treatment processes that require insertion into the human body. Among them, the magnetic navigation puncture needle uses magnetic field navigation for positioning. Before treatment, the puncture needle is magnetized by a magnetization device, and then an external magnetic source detection device is placed near the target position outside the human body to achieve the navigation of the puncture needle. During the treatment process, the magnetized puncture needle can help medical staff quickly locate and complete the treatment under the guidance of the external magnetic source. However, the puncture needle is generally made of stainless steel, and it is difficult to maintain magnetism for a long time after magnetization, so it needs to be magnetized repeatedly, which is not conducive to treatment.

[0003] In the prior art, the utility model patent with the patent publication number CN212879400U discloses a wireless magnetic positioning navigation biopsy needle, which includes a biopsy needle body and a navigation module. The biopsy needle body includes a needle tube, a needle tip at the front end of the needle tube, and the end of the biopsy needle. The navigation module includes a magnetic induction coil and a control circuit. The magnetic induction coil is arranged on the needle tip, and the control circuit unit is detachably arranged at the end of the biopsy needle. The magnetic induction coil is connected to the circuit control unit through a data line.

[0004] The invention patent provided by the patent publication number CN116650081A discloses a coaxial puncture needle and a puncture system based on electromagnetic navigation, which includes a transmission component, a puncture component, and a navigation component. The transmission component includes a sleeve and a sleeve seat. The puncture component includes a puncture body and a puncture handle. The puncture body is inserted into the sleeve. The navigation component includes a navigation needle and a navigation needle joint arranged at the distal end of the navigation needle. The navigation needle is inserted into the puncture body. The electromagnetic sensor is connected to the navigation needle head through a signal line inserted into the navigation needle, and the navigation needle head is connected to a magnetic navigator to achieve electromagnetic navigation.

[0005] Although the electromagnetic navigation needle can ensure the stable magnetism of the navigation needle, it needs to install functional components such as a control circuit and an inductor to magnetize the navigation needle. During use, the magnetized navigation needle will lose its magnetism, especially in some major surgeries where the operation time is very long, so it needs to be magnetized multiple times. Therefore, during the operation, the navigation needle needs to be taken out of the human body multiple times for magnetization and then inserted again, which undoubtedly increases the operation time and also increases the risk to the patient. Summary of the Invention

[0006] In view of this, the present utility model provides a magnetic navigation needle made of magnetizable material with a simple structure and convenient magnetization to solve the above problems.

[0007] A magnetic navigation needle made of magnetizable material, which includes a needle sleeve assembly and a needle core assembly detachably connected to the needle sleeve assembly. The needle sleeve assembly includes a handle, an installation through hole provided on the handle, and a needle sleeve provided at one end of the handle. The needle core assembly includes a needle seat and a magnetized needle core fixedly provided on the needle seat. The magnetized needle core includes a core body made of magnetizable material and a functional layer coated on the outer side of the core body. The functional layer is used to reduce the friction coefficient of the core body and prevent the core body from being corroded.

[0008] Further, the core body is made of martensitic steel or ferritic steel.

[0009] Further, the functional layer is a coating formed by spraying a biocompatible material on the surface of the core body.

[0010] Further, the needle seat includes a needle seat main body, an insertion column fixedly provided in the needle seat main body, and a limit projection provided on the needle seat main body.

[0011] Further, the size and shape of the needle sleeve are both matched with the core body.

[0012] Further, the handle includes a holding part, a needle seat connecting part fixedly provided at one end of the holding part, a baffle clamping part provided at the other end of the holding part, and a needle sleeve installation part provided on the side of the baffle clamping part opposite to the holding part.

[0013] Further, the installation through hole axially penetrates the handle.

[0014] Further, the needle sleeve assembly further includes a baffle fixedly clamped on one side of the handle.

[0015] Further, the baffle includes a baffle main body and a baffle installation groove provided on the baffle main body.

[0016] Compared with the prior art, the magnetization needle core of a magnetic navigation needle made of magnetizable material provided by the present utility model includes a core body made of magnetizable material and a functional layer coated on the outer side of the core body. The core body is made of martensitic steel or ferritic steel, and only one magnetization of the magnetization needle core is required during production to enable the magnetization needle core to have magnetism for a long time, thereby avoiding multiple magnetizations during the operation, saving time, and also avoiding adhesion of bacteria during the process of taking out or inserting the magnetization needle core multiple times. At the same time, the functional layer is coated on the core body, which can provide a lubricating effect to reduce the friction coefficient of the core body to facilitate the insertion of the core body into the human body. The functional layer also has an anti-corrosion function to prevent the core body from being corroded and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of a magnetic navigation needle made of magnetizable material provided by the present utility model.

[0018] Figure 2 is Figure 1 exploded structural schematic of the magnetic navigation needle made of magnetizable material.

[0019] Figure 3 is Figure 1 structural schematic of the needle core assembly of the magnetic navigation needle made of magnetizable material.

[0020] Figure 4 is Figure 1 structural schematic of the handle of the magnetic navigation needle made of magnetizable material.

[0021] Figure 5 is Figure 1 structural schematic of the baffle of the magnetic navigation needle made of magnetizable material.

[0022] Figure 6 is Figure 1 cross-sectional structural schematic of the magnetization needle core of the magnetic navigation needle made of magnetizable material. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further details the specific embodiments of the present utility model. It should be understood that the description of the present utility model herein is not intended to limit the protection scope of the present utility model.

[0024] As Figures 1 to 6As shown, it is a schematic structural diagram of a magnetic navigation needle made of magnetizable material provided by the present utility model. The magnetic navigation needle made of magnetizable material includes a needle sleeve assembly 10 and a needle core assembly 20 detachably connected to the needle sleeve assembly 10. It can be imagined that the magnetic navigation needle made of magnetizable material should also include some other functional components, such as a mounting component, an external magnetic source detection device, etc., which are well-known prior arts to those skilled in the art and will not be elaborated here.

[0025] The needle sleeve assembly 10 includes a handle 11, a mounting through hole 12 provided on the handle 11, a baffle 13 fixedly clamped on one side of the handle 11, and a needle sleeve 14 provided at one end of the handle 11.

[0026] The handle 11 includes a holding portion 111, a needle base connecting portion 112 fixedly provided at one end of the holding portion 111, a baffle clamping portion 113 provided at the other end of the holding portion 111, and a needle sleeve mounting portion 114 provided on the side of the baffle clamping portion 113 opposite to the holding portion 111.

[0027] The holding portion 111 has an "I"-shaped structure for easy gripping by the user's fingers. Preferably, a plurality of wavy anti-slip strips can be further provided on the holding portion 111. The wavy anti-slip strips can be provided on the surface of the waist of the "I"-shaped holding portion 111, and the concave portions of the wavy anti-slip strips can fit with the fingers during use to achieve an anti-slip effect.

[0028] The needle base connecting portion 112 includes a connecting cylinder 1121 and two clamping protrusions 1122 symmetrically provided at the free end of the connecting cylinder 1121. The needle base connecting portion 112 is used for plugging and fixedly connecting the needle core assembly 20, which will be described in detail below in conjunction with the needle core assembly 20.

[0029] The baffle clamping portion 113 includes a clamping main body 1131 clamped on the holding portion 111, a limiting plate 1132 provided at one end of the clamping main body 1131, and a plurality of clamping ridges 1133 spaced apart on the clamping main body 1131. The limiting plate 1132 is provided at the end of the clamping main body 1131 facing away from the holding portion 111 and is spaced apart from the holding portion 111 to form a baffle limiting protrusion. The width of the baffle limiting protrusion should match the thickness of the baffle 13 to limit the baffle 13. The clamping ridges 1133 are symmetrically provided on both sides of the clamping main body 1131 for fixedly installing the baffle 13.

[0030] The needle sleeve mounting portion 114 is located at an end of the clamping main body 1131 opposite to the needle seat connecting portion 112. The needle sleeve mounting portion 114 is used to set the needle sleeve 14, so as to mount the needle sleeve 14 on the handle 11. When the needle core assembly 20 is assembled with the handle 11, the following magnetized needle core 22 is inserted through the needle sleeve 14.

[0031] The mounting through hole 12 is used to set the needle core assembly 20. The mounting through hole 12 penetrates the handle 11 along the axial direction of the handle 11. When the needle core assembly 20 is mounted on the needle sleeve assembly 10, the needle core assembly 20 is inserted through the mounting through hole 12.

[0032] The baffle 13 includes a baffle main body 131 and a baffle mounting groove 132 formed on the baffle main body 131.

[0033] The baffle main body 131 can be an oval plate body and is fixedly clamped on the baffle clamping portion 113 through the baffle mounting groove 132. The baffle main body 131 can prevent sundries from falling into the patient's wound to a certain extent during treatment, thus avoiding infecting the wound, and at the same time facilitating the force application of the finger during puncture.

[0034] The baffle mounting groove 132 is formed on one side of the baffle main body 131 and penetrates to two-thirds of the width of the baffle main body 131. The baffle mounting groove 132 includes a clamping groove 1321 and positioning grooves 132 on two side walls of the clamping groove 1321. The clamping groove 1321 is trapezoidally arranged, and the long bottom side of the trapezoid is the open end. The positioning grooves 1322 are U-shaped grooves symmetrically arranged on two side walls of the clamping groove 1321. Further, the width of the open end of the clamping groove 13 is greater than the width between two adjacent clamping edges 1133. Thus, during installation, the clamping groove 1321 is inserted perpendicular to the extending direction of the baffle clamping portion 113 until the width of the clamping groove 1321 is equal to the width between two adjacent clamping edges 1133, that is, at the positioning groove 1322. At this time, the clamping edge 1133 is clamped in the positioning groove 1322, thereby clamping the baffle main body 1321 on the baffle clamping portion 113.

[0035] One end of the needle sleeve 14 is inserted and fixed in the needle sleeve mounting portion 114. The size and shape of the needle sleeve 14 are both matched with the following magnetized needle core 22. During puncture, the needle sleeve 14 is sleeved on the magnetized needle core 22 and enters the human body together with the magnetized needle core 22. The needle sleeve 14 can be used as a retention needle to stay in the human body after puncture for drug infusion, thus avoiding damage to the human body caused by multiple punctures and improving the treatment and nursing efficiency. [[ID=**********]]

[0036] The needle core assembly 20 includes a needle holder 21 and a magnetized needle core 22 fixedly arranged on the needle holder 21.

[0037] The needle holder 21 is used for assembling the magnetized needle core 22 for easy handling. The needle holder 21 includes a needle holder body 211, a plug post 212 fixedly arranged in the needle holder body 211, and a limit projection 213 arranged on the needle holder body 211.

[0038] The cross-sectional contour of the needle holder body 211 matches the end contour of the holding part 111 so that the needle holder 21 can be connected with the holding part 111.

[0039] The plug post 212 is of a cylindrical structure and is located on the bottom wall of the needle holder body 211 facing away from the holding part 111. The outer contour diameter of the plug post 212 matches the inner diameter of the connecting cylinder 1121 so that the plug post 212 can be inserted into the connecting cylinder 1121.

[0040] The limit projection 213 is located on the inner side wall of the needle holder body 211 and is used to cooperate with the clamping projection 1122 to clamp the needle holder 21 and the handle 11 together. When the needle sleeve assembly 10 is connected with the needle core assembly 20, the magnetized needle core 22 is inserted into the installation through hole 12 from one side of the connecting cylinder 1121. At the same time, the connecting cylinder 1121 is inserted into the needle holder 21 and sleeved on the plug post 212. When one end of the connecting cylinder 1121 abuts against the bottom of the needle holder 21, rotate the needle holder 21 or the handle 11 so that the clamping projection 1122 is clamped between the limit projection 213 and the bottom of the needle holder 21, so that the base 21 and the handle 11 are clamped with each other, thereby preventing the needle holder 21 from separating from the handle 11. In addition, it can be imagined that the connection between the plug post 212 and the connecting cylinder 1121 can also be realized by using an eight-shaped card slot in the prior art.

[0041] The magnetized needle core 22 is the main functional part of the magnetic navigation needle for puncture treatment. When the needle core assembly 20 is assembled with the needle sleeve assembly 10, the magnetized needle core 22 passes through the mounting through-hole 12 and is inserted into the needle sleeve 14. The shape and diameter of the magnetized needle core 22 match those of the needle sleeve 14, which is conducive to puncture. Further, the magnetized needle core 22 includes a core body 221 made of a magnetizable material and a functional layer 222 coated on the outer side of the core body 221. The magnetizable material can be made of martensitic steel, ferritic steel or other materials that can be permanently magnetized. Martensitic steel and ferritic steel are both composed of iron and carbon and usually exist in a face-centered cubic crystal structure in steel. Martensitic steel and ferritic steel are both self-magnetic and easy to magnetize, and have good toughness and plasticity. A coating made of a biocompatible material, that is, the functional layer 222, should also be coated on the surface of the core body 221. The functional layer 222 is used to make the surface of the core body 221 smooth for easy insertion and also to prevent the core body 221 from being corroded. Therefore, the functional layer 222 can be made of materials such as polytetrafluoroethylene (PTFE), parylene, etc. Materials such as polytetrafluoroethylene and parylene have characteristics such as good chemical stability, non-stickiness, and low friction coefficient.

[0042] Before using the magnetic navigation needle made of a magnetizable material, the magnetized needle core 22 is magnetized first, and then the magnetized needle core 22 is passed through the handle 11 and inserted into the needle sleeve 14, and the needle seat 21 is engaged with the needle seat connecting portion 112 to assemble the needle core assembly 20 with the needle sleeve assembly 10.

[0043] Compared with the prior art, the magnetized needle core 22 of the magnetic navigation needle made of a magnetizable material provided by the present utility model includes a core body 221 made of a magnetizable material and a functional layer 222 coated on the outer side of the core body 221. The core body 221 is made of martensitic steel or ferritic steel. When it is produced, only one magnetization of the magnetized needle core 22 is required to enable the magnetized needle core 22 to have magnetism for a long time, thereby avoiding magnetization during the operation multiple times, saving time, and also avoiding adhesion of bacteria during the process of taking out or inserting the magnetized needle core 22 multiple times. At the same time, the functional layer 222 is coated on the core body 221, which can provide a lubricating effect to reduce the friction coefficient of the core body 221 for easy insertion of the core body 221 into the human body. The functional layer 222 also has an anti-corrosion function to prevent the core body 221 from being corroded and extend its service life.

[0044] The above are only the preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are all covered within the scope of the claims of the present utility model.

Claims

1. A magnetic navigation needle made of magnetizable material, characterized in that: The magnetic navigation needle made of magnetizable material includes a needle sleeve assembly and a needle core assembly detachably connected to the needle sleeve assembly. The needle sleeve assembly includes a handle, a mounting through hole provided on the handle, and a needle sleeve provided at one end of the handle. The needle core assembly includes a needle base and a magnetized needle core fixedly provided on the needle base. The magnetized needle core includes a core body made of magnetizable material and a functional layer coated on the outer side of the core body. The functional layer is used to reduce the friction coefficient of the core body and prevent the core body from being corroded.

2. The magnetic navigation needle made of a magnetizable material as claimed in claim 1, wherein: The core body is made of martensitic steel, ferritic steel or permanent magnet material.

3. The magnetic navigation needle made of magnetizable material according to claim 1, characterized in that: The functional layer is a coating formed by spraying a biocompatible material on the surface of the core body.

4. The magnetic navigation needle made of a magnetizable material according to claim 1, wherein: The needle base includes a needle base body, a plug post fixedly provided in the needle base body, and a limit projection provided on the needle base body.

5. The magnetic navigation needle made of magnetizable material according to claim 1, characterized in that: The size and shape of the needle sleeve are both matched with those of the core body.

6. The magnetic navigation needle made of a magnetizable material according to claim 1, characterized in that: The handle includes a holding part, a needle base connecting part fixedly provided at one end of the holding part, a baffle clamping part provided at the other end of the holding part, and a needle sleeve mounting part provided on the side of the baffle clamping part opposite to the holding part.

7. The magnetic navigation needle made of a magnetizable material according to claim 1, wherein: The mounting through hole axially penetrates the handle along the axis of the handle.

8. The magnetic navigation needle made of a magnetizable material according to claim 1, characterized in that: The needle sleeve assembly further includes a baffle fixedly clamped on one side of the handle.

9. The magnetic navigation needle made of a magnetizable material as claimed in claim 8, characterized in that: The baffle includes a baffle body and a baffle mounting groove formed in the baffle body.

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