Lumbar anesthesia needle

Abstract

The utility model relates to the technical field of medical instruments, in particular to a lumbar anesthesia needle. The outer tube is hollow and tubular, and the far end of the outer tube is provided with a dosing through hole; the inner core is arranged in the outer tube; a limiting module; a through hole is formed in the outer pipe, the inner pipe is installed on the outer pipe and comprises a first module and a second module, the first module and the second module are movably installed through a positioning column, and the friction force between the through hole and the outer pipe is adjusted through the installation gap between the first module and the second module; and a sharp puncture point is arranged on the inner core or the outer tube. The limiting module is arranged on the outer tube and is locked after puncture is in place, the needle body is prevented from further going deep, iatrogenic injury caused by misoperation is reduced, and operation safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a lumbar puncture needle. BACKGROUND

[0002] Lumbar anesthesia is a common anesthesia method and is widely used in lower abdominal and lower limb surgeries. A lumbar puncture needle is a key device for implementing lumbar anesthesia, which is usually composed of an outer tube and an inner core. The outer tube and the inner core are inserted into the subarachnoid space through the lumbar intervertebral space, and anesthetic drugs are injected to achieve the effect of nerve block. However, in the process of clinical use, the traditional lumbar puncture needle lacks an effective depth locking mechanism. The existing lumbar puncture needle usually relies on the operator's sense of touch to judge the puncture depth, but lacks a clear limiting or locking structure, so that once the puncture is in place, it may still be further inserted due to misoperation or changes in the patient's posture, increasing the risk of iatrogenic injury.

[0003] In view of the above problems, there is an urgent need for an improved lumbar puncture needle structure. SUMMARY

[0004] To solve the problems mentioned in the background, the purpose of the present application is to provide a lumbar puncture needle that solves the problems in the prior art.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A lumbar puncture needle, comprising:

[0007] an outer tube, which is a hollow tubular structure, and has a drug delivery through hole at the distal end;

[0008] an inner core, which is arranged in the outer tube;

[0009] a limiting module, which is internally provided with a through hole, is mounted on the outer tube, and comprises a first module and a second module, the first module and the second module are movably mounted through a positioning column, and the friction between the through hole and the outer tube is adjusted through the installation gap between the first module and the second module;

[0010] The inner core or the outer tube is provided with a sharp puncture point.

[0011] Further, the first module and the second module are both semi-ring structures;

[0012] The second module is provided with a second channel groove, a positioning through hole and a locking buckle on the plane, and the locking buckle is provided with a locking tooth;

[0013] The first module is provided with a first channel groove, a positioning column and a buckle groove on the plane;

[0014] The first module and the second module are movably installed by inserting the positioning column into the positioning through hole, and are locked by the cooperation of the locking buckle and the buckle groove.

[0015] Further, the limiting module is in the shape of a goose egg as a whole

[0016] Further, the inner side of the first module and the second module is respectively provided with a first elastic block and a second elastic block, the inner side of the first elastic block is provided with a first channel groove, and the inner side of the second elastic block is provided with a second channel groove.

[0017] Further, the outer tube comprises an outer tube body, the proximal end of the outer tube body is provided with an outer tube holding part, and the outer tube holding part is provided with a holding arc face.

[0018] Further, the distal end of the outer tube holding part is provided with a fixing ring, and the lower side of the fixing ring is provided with a limiting groove,

[0019] The inner core comprises an inner core needle body, the distal end of the inner core needle body is provided with a pressing part, the pressing part comprises a limiting ring groove matched with the fixing ring and a positioning boss matched with the limiting groove.

[0020] Further, the outer side of the outer tube is provided with a scale.

[0021] Further, the puncture point is arranged on the outer tube, the front end of the outer tube is provided with a puncture tip, and the side surface of the puncture tip is provided with a side surface through hole.

[0022] Further, the puncture point is arranged on the inner core, the front end of the inner core is provided with an inner core tip, the front end of the outer tube is provided with an opening, and the inner core tip is exposed when the inner core is arranged in the outer tube.

[0023] Further, the side surface of the outer tube is provided with a side surface through hole.

[0024] The present application has the following beneficial effects:

[0025] The present application sets the limiting module on the outer tube and locks after puncturing, prevents the needle body from further penetrating, reduces iatrogenic injury caused by misoperation, and improves the safety of operation. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings;

[0027] Figure 1 is the schematic diagram of the overall structure of the disclosed embodiment of the present application;

[0028] Figure 2 is the schematic diagram of the outer tube of the disclosed embodiment of the present application;

[0029] Figure 3 is the schematic diagram of the inner core of the disclosed embodiment of the present application;

[0030] Figure 4 is the schematic diagram of the limiting module of the disclosed embodiment of the present application;

[0031] Figure 5 is the schematic diagram of the internal structure of the limiting module of the disclosed embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0033] Lumbar anesthesia is a common anesthesia method and is widely used in lower abdominal and lower limb surgeries. A lumbar anesthesia needle is a key instrument for implementing lumbar anesthesia, which is usually composed of an outer tube and an inner core, penetrates into the subarachnoid space through the lumbar intervertebral space, and injects anesthetic drugs to achieve the effect of nerve block. The present disclosure provides a lumbar anesthesia needle, which is provided with a movable limiting block on the outer tube, and the limiting block has a locking function, so that the lumbar anesthesia needle can be locked after puncture to avoid further penetration, thereby increasing the risk of iatrogenic injury. Some embodiments of the present disclosure, as shown in Figure 1 The lumbar anesthesia needle includes an outer tube 1, an inner core 2, and a limiting module 3. In the embodiment, the inner core 2 is arranged in the outer tube 1, and the limiting module 3 is movably arranged on the outer tube 1 during puncture.

[0034] Limiting module 3

[0035] As shown in Figures 4-5 In some embodiments, the limiting module 3 includes a first module 31 and a second module 32.

[0036] The second module 32 is located outside the outer tube 1 and has a semi-ring structure, and a second passage groove 32, a positioning through hole 323, and a locking buckle 324 are arranged on the plane of the second module 32. The locking buckle 324 is provided with a locking tooth 325.

[0037] The first module 31 is located outside the outer tube 1 and has a semi-ring structure, and a first passage groove 312, a positioning column 323, and a buckle groove 314 are arranged on the plane of the first module 31.

[0038] As shown in Figure 4As shown, in the installation, the first module 31 and the second module 32 are respectively arranged on both sides of the outer tube 1, the positioning column 323 is installed into the positioning through hole 323 to tighten the first module 31 and the second module 32 to each other, so that the limiting module 3 composed of the first module 31 and the second module 32 can be fixed on the outer tube 1 without external force, and can freely slide when being resisted by the skin or manually applying force during puncture.

[0039] Further, the limiting module 3 is goose egg-shaped as a whole, so that the resistance effect with the skin can also not cause discomfort.

[0040] It can be understood that the friction between the outer tube 1 and the limiting module 3 is generated through the friction between the second channel groove 322 and the first channel groove 312 and the outer wall of the outer tube 1, and the interference balance between the positioning column 323 and the positioning through hole 323 makes the first module 31 and the second module 32 fixed to each other.

[0041] When puncturing, the limiting module 3 moves backward with the resistance of the skin, and when puncturing in place, the first module 31 and the second module 32 are pressed to further approach each other, at which time the buckle groove 314 and the locking buckle 324 cooperate to complete the locking, so that the friction between the outer tube 1 and the limiting module 3 increases to complete the locking, preventing the spinal needle from further penetrating.

[0042] It can be understood that by changing the interference amount and material of the positioning column 323 and the positioning through hole 323, the same technical effect can be achieved without using the buckle groove 314 and the locking buckle 324; in some embodiments, the positioning column 323 can be made of elastic material such as rubber, etc., and a one-way locking boss can also be provided on the side of the positioning column 323.

[0043] As shown, Figure 4 In some embodiments, the first module 31 and the second module 32 are respectively provided with a first elastic block 311 and a second elastic block 321, the inner side of the first elastic block 311 is provided with a first channel groove 312, and the inner side of the second elastic block 321 is provided with a second channel groove 322, so that the friction between the outer tube 1 and the limiting module 3 can be better controlled by elasticity, and the elastic block material can be rubber, silicone, etc., or the limiting module as a whole can be made of elastic material.

[0044] In some embodiments, the outer tube 1 and the inner core 2 are provided with sharp puncture points at the front end when combined, the puncture points can be selectively arranged on the outer tube 1 and the inner core 2, and the distal end of the outer tube 1 is provided with a drug delivery through hole for the outflow of liquid medicine;

[0045] The outer tube 1 comprises an outer tube body 11, a outer tube holding portion 15 is arranged on the proximal end of the outer tube body 11, a holding arc surface 16 for convenient holding is arranged on the outer tube holding portion 15, a fixing ring 17 is arranged at the distal end of the outer tube holding portion 15, and a limiting groove 18 is arranged below the fixing ring 17.

[0046] The inner core 2 includes an inner core needle body 21. The distal end of the inner core needle body 21 is provided with a pressing part 23. The pressing part 23 includes a limiting ring groove 24 that cooperates with the fixing ring 17 and a positioning boss 25 that cooperates with the limiting groove 18.

[0047] When using it, insert the inner core 2 into the outer tube 1 to fix it and then perform puncture. After the puncture is in place, remove the inner core 2 and perform spinal anesthesia.

[0048] The outer tube holding part 15 and the pressing part 23 are made of plastic and are produced by injection molding.

[0049] In some disclosures, a scale 14 is provided on the outer side of the outer tube 11 to facilitate the determination of the puncture depth.

[0050] like Figure 2 As shown, in some embodiments, the puncture point is set on the outer tube 1, the outer tube 1 has a cavity, the front end has a puncture tip 13, and the side of the puncture tip 13 has a side through hole 12. With this design, since the puncture point is set on the outer tube 1 and the side through hole 12 serves as a drug delivery through hole, compared with the traditional inner core puncture structure, this design can provide more stable support during puncture, reduce needle shaking, and improve puncture accuracy.

[0051] Meanwhile, the side through-hole 12 helps to release anesthetic drugs evenly, making the drugs diffuse more evenly in the subarachnoid space, thereby reducing nerve stimulation or discomfort.

[0052] The side through-hole 12 avoids the limitation of drug release only from the needle tip. If the needle tip is blocked by tissue, the side hole provides a drug outlet to avoid the above situation, thereby ensuring smooth drug delivery, reducing the risk of blockage and improving injection efficiency.

[0053] like Figure 1 - Figure 3 As shown, in some embodiments, the puncture point is set on the inner core 2, the front end of the inner core is provided with an inner core tip 22, the front end of the outer tube 1 is provided with an opening, and the inner core tip 22 is exposed when the inner core 2 is placed inside the outer tube 1 for puncture; with such design, the processing difficulty can be reduced and secondary damage to the puncture point can be avoided after puncture.

[0054] Understandably, the outer tube 1 can also have a side through hole 12 on the side of the outer tube 1 to make the drug diffuse more evenly in the subarachnoid space, using a scheme where the puncture point is set on the inner core 2.

[0055] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A spinal needle, characterized in that, The utility model relates to a drug delivery device, comprising: an outer tube, hollow and tubular, having a dispensing aperture at a distal end thereof; an inner core disposed within the outer tube; a limiting module, having a through hole, mounted on the outer tube, comprising a first module and a second module, the first module and the second module being movably mounted by a positioning column, the friction between the through hole and the outer tube being adjusted by the installation gap between the first module and the second module; the inner core or the outer tube is provided with a sharp puncture point.

2. The spinal needle of claim 1, wherein, The first module and the second module are both semi-annular structures. The second module is provided with a second channel groove, a positioning through hole and a locking buckle on a plane thereof, the locking buckle being provided with locking teeth; the first module is provided with a first channel groove, a positioning column and a buckle groove on a plane thereof; the first module and the second module are movably mounted by the positioning column being inserted into the positioning through hole, and are locked by the locking buckle cooperating with the buckle groove, the first channel groove and the second channel groove cooperating to form a through hole.

3. The spinal needle of claim 1, wherein, The limiting module is in the shape of a goose egg as a whole.

4. The spinal needle of claim 1 wherein, The inner sides of the first module and the second module are respectively provided with a first elastic block and a second elastic block, the inner side of the first elastic block being provided with a first channel groove, and the inner side of the second elastic block being provided with a second channel groove.

5. The spinal needle of claim 1 wherein, The outer tube comprises an outer tube body, the proximal end of the outer tube body being provided with an outer tube holding portion, the outer tube holding portion being provided with a holding arc surface.

6. The spinal needle of claim 5 wherein, The distal end of the outer tube holding portion is provided with a fixing ring, the lower side of the fixing ring being provided with a limiting groove, the inner core comprises an inner core needle body, the distal end of the inner core needle body being provided with a pressing portion, the pressing portion comprising a limiting ring groove cooperating with the fixing ring and a positioning boss cooperating with the limiting groove.

7. The spinal needle of claim 1 wherein, The outer side of the outer tube is provided with a scale.

8. The spinal needle of claim 1 wherein, The puncture point is arranged on the outer tube, the front end of the outer tube being provided with a puncture tip, the side surface of the puncture tip being provided with a side surface through hole.

9. The spinal needle of claim 1 wherein, The puncture point is arranged on the inner core, the front end of the inner core being provided with an inner core tip, the front end of the outer tube being provided with an opening, the inner core tip being exposed when the inner core is placed in the outer tube.

10. The spinal needle of claim 9, wherein, The side surface of the outer tube is provided with a side surface through hole.

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