Magnetic navigation needle with permanent magnet

Abstract

A magnetic navigation needle with a permanent magnet comprises a needle sleeve assembly and a needle core assembly detachably connected with the needle sleeve assembly. The needle core assembly comprises a needle base and a magnetic needle core fixedly arranged on the needle base. The magnetic needle core comprises a core body, at least two magnetic rings arranged on the core body at intervals, and at least two magnetic ring accommodating grooves which are arranged corresponding to the magnetic rings and are used for accommodating the magnetic rings. And the magnetic ring is accommodated in the magnetic ring accommodating groove and is fixedly connected with the core body. The magnetic ring is made of a magnetic material, so that the magnetic navigation needle can be permanently kept magnetic without magnetization, the situation that the magnetic navigation needle needs to be repeatedly taken out of a human body to be magnetized in the treatment process, operation time is wasted is avoided, and infection caused by bacteria adhesion in the process that the navigation needle is taken out or inserted for multiple times can also be avoided.

Description

Technical Field

[0001] The utility model relates to the field of magnetic navigation needles, in particular to a magnetic navigation needle with a permanent magnet. 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 utility model provides a magnetic navigation needle with a permanent magnet that has a simple structure and stable magnetism to solve the above problems.

[0007] A magnetic navigation needle with a permanent magnet, which comprises a needle sleeve assembly and a needle core assembly inserted into the needle sleeve assembly. The needle core assembly includes a needle base and a magnetic needle core fixedly arranged on the needle base. The magnetic needle core includes a core body, at least two magnetic rings arranged at intervals on the core body, and at least two magnetic ring accommodating grooves corresponding to the magnetic rings and used for accommodating the magnetic rings. The magnetic rings are accommodated in the magnetic ring accommodating grooves and fixedly connected to the core body. The magnetic ring is composed of at least two sub-magnetic rings, and at least two of the sub-magnetic rings are combined into a complete circle, and the inner diameter of the complete circle is consistent with the diameter of the magnetic ring accommodating groove. The magnetic ring is made of a permanent magnetic material.

[0008] Further, the magnetic material used for the magnetic ring is a permanent magnet.

[0009] Further, the magnetic ring is fixedly connected to the core body by welding or pasting.

[0010] Further, when the magnetic ring is accommodated in the accommodating groove, the outer side wall of the magnetic ring is flush with the outer side wall of the core body.

[0011] Further, the magnetic ring accommodating grooves are arranged at intervals along the axial direction of the core body, and the width of the magnetic ring accommodating groove is an integer multiple of the axial length of the magnetic ring.

[0012] Further, the magnetic ring accommodating groove is an annular accommodating groove.

[0013] Further, the needle sleeve assembly includes a handle, a mounting through hole arranged on the handle, a baffle fixedly clamped on one side of the handle, and a needle sleeve arranged at one end of the handle.

[0014] Further, the magnetic needle core is inserted into the needle sleeve.

[0015] Compared with the prior art, the magnetic navigation needle with a permanent magnet provided by the present utility model has multiple magnetic rings arranged on the core body, and the magnetic rings are made of permanent magnets, so that the magnetic navigation needle with a permanent magnet can maintain long-term magnetism for a long time and avoid multiple magnetizations. Therefore, the magnetic navigation needle with a permanent magnet does not need to be taken out of the human body multiple times for magnetization during the operation, thus avoiding the waste of operation time and also avoiding the infection caused by adhesion of bacteria during the process of taking out or inserting the navigation needle multiple times. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a magnetic navigation needle with a permanent magnet provided by the present utility model.

[0017] Figure 2 is Figure 1 exploded view of a magnetic navigation needle with a permanent magnet.

[0018] Figure 3 is Figure 1 structural schematic of the needle core assembly of the magnetic navigation needle with a permanent magnet.

[0019] Figure 4 is Figure 1 cross-sectional structural schematic of the magnetic needle core of the magnetic navigation needle with a permanent magnet.

[0020] Figure 5 is Figure 1 structural schematic of the handle of the magnetic navigation needle with a permanent magnet.

[0021] Figure 6 is Figure 1 structural schematic of the baffle of the magnetic navigation needle with a permanent magnet. Detailed implementation manners

[0022] The following further elaborates on specific embodiments of the present utility model. It should be understood that the description of the present utility model herein does not limit the protection scope of the present utility model.

[0023] As Figures 1 to 6 shown, it is a structural schematic of a magnetic navigation needle with a permanent magnet provided by the present utility model. The magnetic navigation needle with a permanent magnet includes a needle sleeve assembly 10 and a needle core assembly 20 detachably connected to the needle sleeve assembly 10. It can be conceived that the magnetic navigation needle with a permanent magnet should also include some other functional components, such as an installation component, an external magnetic source detection device, etc., which are prior arts well-known to those skilled in the art and will not be elaborated herein.

[0024] The needle sleeve assembly 10 includes a handle 11, an installation 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.

[0025] The handle 11 includes a holding part 111, a needle seat connection part 112 fixedly provided at one end of the holding part 111, a baffle clamping part 113 provided at the other end of the holding part 111, and a needle sleeve installation part 114 provided on the side of the baffle clamping part 113 opposite to the holding part 111.

[0026] The holding part 111 has a "work" - shaped structure to facilitate the user's finger holding. Preferably, a plurality of wavy anti - slip strips can be additionally provided on the holding part 111. The wavy anti - slip strips can be arranged on the surface of the waist of the "work" - shaped holding part 111, and the concave parts of the wavy anti - slip strips can fit with the fingers during use to achieve an anti - slip effect.

[0027] The needle holder connecting part 112 includes a connecting cylinder 1121 and two clamping protrusions 1122 symmetrically arranged at the free end of the connecting cylinder 1121. The needle holder connecting part 112 is used for plugging and fixedly connecting the needle core assembly 20, which will be described in detail below in combination with the needle core assembly 20.

[0028] The baffle clamping part 113 includes a clamping main body 1131 clamped on the holding part 111, a limiting plate 1132 arranged at one end of the clamping main body 1131, and a plurality of clamping edges 1133 arranged at intervals on the clamping main body 1131. The limiting plate 1132 is arranged at the end of the clamping main body 1131 facing away from the holding part 111 and is spaced from the holding part 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 edges 1133 are symmetrically arranged on both sides of the clamping main body 1131 and are used for fixedly installing the baffle 13.

[0029] The needle sleeve mounting part 114 is located on the clamping main body 1131 and is arranged at the end opposite to the needle holder connecting part 112. The needle sleeve mounting part 114 is used for arranging the needle sleeve 14, so as to mount the needle sleeve 14 on the handle 11. When the needle core assembly 20 and the handle 11 are assembled together, the following magnetic needle core 22 passes through the needle sleeve 14.

[0030] The mounting through - hole 12 is used for arranging the needle core assembly 20. The mounting through - hole 12 axially penetrates the handle 11 along the axis of the handle 11. When the needle core assembly 20 is mounted on the needle sleeve assembly 10, the needle core assembly 20 passes through the mounting through - hole 12.

[0031] The baffle 13 includes a baffle main body 131 and a baffle mounting groove 132 opened on the baffle main body 131.

[0032] The baffle main body 131 can be an oval plate body and is fixedly clamped on the baffle clamping part 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 wound infection.

[0033] The baffle mounting groove 132 is opened 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 a positioning groove 1322 provided 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 groove 1322 is a U-shaped groove symmetrically arranged on two side walls of the clamping groove 1321. Further, the width of the open end of the clamping groove 1321 is greater than the width between two adjacent clamping edges 1133, so that when installed, 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, so as to clamp the baffle main body 1321 on the baffle clamping portion 113.

[0034] 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 magnetic needle core 22. During puncture, the needle sleeve 14 is sleeved on the magnetic needle core 22 and enters the human body together with the magnetic needle core 22. The needle sleeve 14 can be used as a retention needle to stay in the human body after puncture for drug input, so as to avoid damage to the human body caused by multiple punctures and improve the treatment and nursing efficiency.

[0035] The needle core assembly 20 includes a needle seat 21 and a magnetic needle core 22 fixedly arranged on the needle seat 21.

[0036] The needle seat 21 is used to assemble the magnetic needle core 22 to facilitate taking the magnetic needle core 22. The needle seat 21 includes a needle seat main body 211, a plug-in column 212 fixedly arranged in the needle seat main body 211, and a limit projection 213 arranged on the needle seat main body 211. [[ID=...]]

[0037] The cross-sectional contour of the needle seat main body 211 matches the end contour of the holding portion 111, facilitating the connection between the needle seat 21 and the holding portion...

[0038] The plug-in column 212 can be a cylindrical structure and is located on the bottom wall of the needle seat main body 211 on the side facing away from the holding portion 111. The outer contour diameter of the plug-in column 212 matches the inner diameter of the connecting cylinder 1121, facilitating the plug-in column 212 to be inserted into the connecting cylinder 1121.

[0039] It should be noted that in the original text, there is an error in the "baffle main body 1321" in the first paragraph, which should be "baffle main body 131". The translation has been corrected accordingly. Also, there seems to be some incomplete or incorrect information in the "The cross-sectional contour of the needle seat main body 211 matches the end contour of the holding portion 111, facilitating the connection between the needle seat 21 and the holding portion... " in the original text where "holding portion..." is not clearly defined. The translation is presented as accurately as possible based on the existing content while maintaining the integrity of the original text structure.The limiting protrusion 213 is located on the inner side wall of the needle seat body 211 and is used to cooperate with the clamping protrusion 1122 to clamp the needle seat 21 and the handle 11 together. When the needle sleeve assembly 10 is connected to the needle core assembly 20, the magnetic needle core 22 is inserted into the installation through hole 12 from one side of the connection cylinder 1121. At the same time, the connection cylinder 1121 is inserted into the needle seat 21 and sleeved on the insertion column 212. When one end of the connection cylinder 1121 abuts against the bottom of the needle seat 21, rotate the needle seat 21 or the handle 11 so that the clamping protrusion 1122 is clamped between the limiting protrusion 213 and the bottom of the needle seat 21, so that the base 21 and the handle 11 are clamped to each other, thereby preventing the needle seat 21 from separating from the handle 11. In addition, it can be imagined that the connection between the insertion column 212 and the connection cylinder 1121 can also be realized by using an eight-shaped card slot in the prior art.

[0040] The magnetic needle core 22 is the main functional part of the magnetic navigation needle and is used for puncture treatment. When the needle core assembly 20 is assembled with the needle sleeve assembly 10, the magnetic needle core 22 passes through the installation through hole 12 and is inserted into the needle sleeve 14. The shape and diameter of the magnetic needle core 22 match the shape and diameter of the needle sleeve 14, which is beneficial to puncture.

[0041] The magnetic needle core 22 includes a core body 221, at least two magnetic rings 222 spaced apart on the core body 221, and at least two magnetic ring accommodation grooves 223 corresponding to the magnetic rings 222 and used for accommodating the magnetic rings 222.

[0042] One end of the core body 221 is fixedly connected to the insertion column 212. The core body 221 can be a puncture needle such as a navigation needle or a biopsy needle for puncture treatment of the human body. The core body 221 is a solid structure. The core body 221 itself is the prior art well-known to those skilled in the art and will not be elaborated here.

[0043] A plurality of the magnetic rings 222 are arranged at intervals on the core body 221 and accommodated in the magnetic ring accommodation grooves 223, and are used to provide magnetism for the core body 221, so that the core body 221 can be detected by an external magnetic source detector and has a navigation effect. In order to enable the magnetic ring 222 to be assembled into the magnetic ring accommodation groove 223, the magnetic ring 222 can be composed of at least two split magnetic rings. When the magnetic ring 222 is composed of two split magnetic rings, the magnetic ring 222 is divided into two equal parts, and when it is composed of three split magnetic rings, the magnetic ring 222 is divided into three equal parts, and so on, to improve compatibility. When the magnetic ring 222 is assembled in the magnetic ring accommodation groove 223, at least two of the split magnetic rings are combined into a complete circle, and the inner diameter of the complete circle is consistent with the diameter of the magnetic ring accommodation groove 223 so that the magnetic ring 222 can be attached to the core body 221. The magnetic ring 222 can be fixedly connected to the core body 221 by means of welding, pasting, etc. The magnetic ring 222 is made of a material with permanent magnetism, such as a permanent magnet. Therefore, the core body 221 can have permanent magnetism without being magnetized during use, thus avoiding wasting surgical time by taking it out of the human body for magnetization multiple times during the operation, and also avoiding the magnetic needle core 22 adhering to bacteria and causing infection to the human body during the process of taking out or inserting the magnetic needle core 22 into and out of the human body multiple times.

[0044] The magnetic ring accommodation grooves 223 are arranged at intervals along the axial direction of the core body 221 on the core body 221 and are used to fixedly arrange the magnetic rings 222. The number of the magnetic ring accommodation grooves 223 is consistent with the number of groups of the magnetic rings 222 to be arranged. The magnetic ring accommodation grooves 223 are annular accommodation grooves, and the width of the magnetic ring accommodation grooves 223 is an integer multiple of the axial length of the magnetic ring 222, and is specifically set according to the number of magnetic rings 222 to be accommodated, so as to facilitate the accommodation of an integer number of the magnetic rings 222. The depth of the magnetic ring accommodation grooves 223 matches the size of the magnetic rings 222, so that when the magnetic rings 222 are accommodated in the magnetic ring accommodation grooves 223, the outer side walls thereof are flush with the outer side wall of the core body 221 to ensure the smoothness of the outer side wall of the core body 221 and facilitate insertion into human tissues.

[0045] When using the magnetic navigation needle with a permanent magnet, the magnetic needle core 22 is passed through the handle 11 and disposed inside the needle sleeve 14, and the needle seat 21 is rotated to be engaged with the needle seat connecting portion 112, so as to assemble the needle core assembly 20 and the needle sleeve assembly 10 together, which is convenient for holding and operation.

[0046] Compared with the prior art, a magnetic navigation needle with a permanent magnet provided by the present utility model has multiple magnetic rings 222 arranged on the core body 221, and the magnetic rings 222 are made of permanent magnets, so that the magnetic navigation needle with a permanent magnet can maintain magnetism for a long time and avoid multiple magnetizations. Therefore, the magnetic navigation needle with a permanent magnet does not need to be taken out of the human body multiple times during the operation for magnetization, thus avoiding the waste of operation time and also avoiding the infection caused by adhesion of bacteria during the process of taking out or inserting the navigation needle multiple times.

[0047] The above are only the preferred embodiments of the present utility model and are not used 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 with a permanent magnet, characterized in that: The magnetic navigation needle with a permanent magnet includes a needle sleeve assembly and a needle core assembly inserted into the needle sleeve assembly. The needle core assembly includes a needle base and a magnetic needle core fixedly arranged on the needle base. The magnetic needle core includes a core body, at least two magnetic rings spaced apart on the core body, and at least two magnetic ring accommodation grooves corresponding to the magnetic rings and used for accommodating the magnetic rings. The magnetic rings are accommodated in the magnetic ring accommodation grooves and fixedly connected to the core body. The magnetic rings are composed of at least two sub-magnetic rings, at least two of the sub-magnetic rings are combined into a complete circle, and the inner diameter of the complete circle is the same as the diameter of the magnetic ring accommodation groove. The magnetic rings are made of a permanent magnetic material.

2. The magnetic navigation needle with a permanent magnet according to claim 1, characterized in that: The magnetic material used for the magnetic rings is a permanent magnet.

3. The magnetic navigation needle with a permanent magnet according to claim 1, characterized in that: The magnetic rings are fixedly connected to the core body by welding or pasting.

4. The magnetic navigation needle with a permanent magnet as described in claim 1, characterized in that:

5. The magnetic navigation needle with a permanent magnet according to claim 1, characterized in that: When the magnetic rings are accommodated in the accommodation grooves, the outer side walls of the magnetic rings are flush with the outer side wall of the core body.

6. The magnetic navigation needle with a permanent magnet according to claim 1, characterized in that: The magnetic ring accommodation grooves are arranged on the core body at intervals along the axial direction of the core body, and the width of the magnetic ring accommodation grooves is an integer multiple of the axial length of the magnetic rings.

7. The magnetic navigation needle with a permanent magnet as described in claim 1, characterized in that: The magnetic ring accommodation grooves are annular accommodation grooves.

8. The magnetic navigation needle with a permanent magnet according to claim 7, characterized in that: The needle sleeve assembly includes a handle, a mounting through hole arranged on the handle, a baffle fixedly clamped on one side of the handle, and a needle sleeve arranged at one end of the handle. The magnetic needle core is inserted into the needle sleeve.

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