CN219166579U - Device for preventing cerebrospinal fluid leakage after lumbar puncture - Google Patents

Abstract

The utility model provides a lumbar puncture postcerebrospinal fluid leakage prevention device, comprising: a puncture cannula, a delivery core and a closure; the puncture sleeve is coaxially provided with a through hole; the conveying core is in sliding fit with the through hole, and a placing cavity is arranged at one end of the conveying core; the side of shutoff piece one end with place the chamber sliding fit, and the diameter of shutoff piece is less than the diameter of placing the chamber, the side of shutoff piece other end is equipped with first barb, first barb orientation shutoff piece's one end. The lumbar puncture postcerebrospinal fluid leakage prevention device is simple to operate, and can be used for plugging the dura mater through the puncture sleeve after the lumbar puncture is completed.

Description

Device for preventing cerebrospinal fluid leakage after lumbar puncture

Technical Field

The utility model relates to the technical field of lumbar puncture, in particular to a device for preventing cerebrospinal fluid leakage after lumbar puncture.

Background

There are important spinal cords, nerve roots in the dura mater, which are completely immersed in the cerebrospinal fluid. Cerebrospinal fluid is a colorless transparent liquid existing in the ventricle and subarachnoid space, surrounds and supports the entire brain and spinal cord, and has protective and supporting effects on the brain and spinal cord. The cerebrospinal fluid is contained within the dural sac along with the spinal cord.

Lumbar puncture is a common clinical procedure used to collect cerebrospinal fluid, measure pressure, and administer drugs. However, the puncture may cause the dura mater to be incomplete, resulting in the escape of dura mater through the dura mater and out of the needle hole by the puncture. Loss of intracranial pressure due to such constant leakage of cerebrospinal fluid can lead to post-lumbar puncture headaches. There is also a considerable chance of accidental puncturing of the dura mater during epidural anesthesia, and headache after dura mater puncture is a more common complication of intraspinal anesthesia, and is mainly characterized by upright headache, i.e. headache or exacerbation, occurring 1-3 days after intraspinal anesthesia, in the upright position of the patient, and headache relief or disappearance in the prone position. The obstetrical manifestation is most prominent, and patients often affect the activities and lactation after suffering from upright headache, which becomes the main cause of postpartum complaints of anesthetists

The dura mater puncture breach is deep and can not be closed by being pressed like superficial blood vessels; in the prior art, devices for dural puncture breach closure have been envisaged.

For example, in U.S. patent application No.2006/0276840, a device for treating dura mater puncture is disclosed that includes an implant in the form of a patch of collagen-type material attached to a suture through the neck. According to the utility model, the dura mater puncture needle cannula for performing the above-mentioned intervention is not removed immediately after the end of the puncture. The distal end remains in the dura mater sac of the patient and the patch is manually introduced into the lumen (or bore) of the needle cannula with the aid of a catheter having a smaller diameter than the lumen of the needle cannula. To do so, the patch is first placed over the distal end of the catheter and the wire is passed through the lumen of the catheter. The physician in charge of the dural seal then grasps the catheter through the opposite end (called the proximal end) of the catheter and slides it into the lumen of the needle cannula until the patch reaches the distal end of the needle cannula that remains in the interior of the dural sac. Finally, the epidural needle is removed and the patch is pulled toward the dura by manual pulling of the wire to seal the aperture or perforation created by the medical intervention. The operation of such dural seals would be technically complex. In addition, the operation difficulty is high, and the operation is completely blind and depends on hand feeling. Furthermore, there is a risk that the patch (even if it has been correctly positioned over the aperture or perforation of the dura mater) may migrate distally towards the inside of the dura mater sac and travel towards the tail or towards the brain. The success rate of sealing is low and there is also a risk of causing nerve damage.

For another example, a device for treating dura mater puncture disclosed in patent CN110545875a is still complex in structure and processing, and the blocking object is withdrawn after extending the puncture needle for traversing, which may clamp the nerve filaments.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model mainly solves the technical problems as follows: what is needed is a lumbar puncture post-cerebrospinal fluid leakage prevention device that is simple in structure and convenient to operate.

In order to solve the technical problems, the utility model adopts the following technical scheme: lumbar puncture postcerebrospinal fluid leakage prevention device, comprising: a puncture cannula, a delivery core and a closure; the puncture sleeve is coaxially provided with a through hole; the conveying core is in sliding fit with the through hole, and a placing cavity is formed in one end of the conveying core; the side of shutoff piece one end with place the chamber sliding fit, just the diameter of shutoff piece is less than place the diameter in chamber, the side of shutoff piece other end is equipped with first barb, first barb is towards the one end of shutoff piece.

According to the utility model, one end of the blocking piece, which is not provided with the first barb, is arranged in the placing cavity of the conveying core, one end of the blocking piece, which is provided with the first barb, is positioned outside the placing cavity, after lumbar puncture is completed, the puncture sleeve is kept motionless, then the conveying core and the blocking piece are simultaneously placed into the through hole of the puncture sleeve, the conveying core pushes the blocking piece to slide in the puncture sleeve, the blocking piece is guided by the puncture sleeve, after the blocking piece enters a blocking position, the conveying core is extracted, the blocking piece and the first barb are contacted with the dura mater, the first barb is embedded into the dura mater, so that the blocking piece is separated from the conveying core, after the conveying core is extracted, the puncture sleeve is extracted, thereby completing implantation of the blocking piece, and the blocking piece is fixed at a dura mater leakage port, so that cerebrospinal fluid in the dura mater sac can be effectively prevented from escaping through the puncture hole. The lumbar puncture postcerebrospinal fluid leakage prevention device is simple to operate, and can immediately complete the blocking of the dura mater through the puncture sleeve after the lumbar puncture is completed.

Preferably, the plugging piece comprises gelatin-based sponge, collagen compact film and shaping piece; collagen compact membranes are arranged on two sides of the gelatin-based sponge in the length direction; the shaping piece comprises a shaping column and a limiting column; the sizing column penetrates through the gelatin-based sponge and the collagen compact membrane in the length direction of the gelatin-based sponge, the two ends of the sizing column are respectively and fixedly connected with the limiting column, and the diameter of the limiting column is the same as that of the gelatin-based sponge; the first barb is fixedly arranged on one of the limit posts. After the plugging piece is implanted into a body, the gelatin-based sponge can drive the collagen compact membrane to open due to the expansion of water absorption of the gelatin-based sponge so as to plug the puncture.

Preferably, a second barb is fixedly arranged on the other limit post, and the second barb and the first barb face opposite directions; grooves are formed in the lower portions of the first barbs and the second barbs, the grooves are located on the side faces of the limiting columns, and the grooves are matched with the first barbs and the second barbs. The second barb is clamped into the groove and then is arranged in the placing cavity, so that the implantation of the plugging piece is not affected by the second barb; simultaneously, the first barb and the second barb that the symmetry set up can carry out spacingly to the shutoff piece, effectually prevented that the shutoff piece from sliding towards both ends.

Preferably, the conveying core comprises a film sleeve, the film sleeve is coaxially and fixedly connected with one end of the conveying core, and a placing cavity is arranged in the film sleeve. The plugging piece is driven to move through the film sleeve, and the film sleeve can be subjected to elastic deformation according to the shape self-adaptation of the plugging piece, so that the plugging piece is not pressed and deformed.

Preferably, one end of the conveying core, which is far away from the placing cavity, is provided with a tailstock, and the tailstock is provided with a supporting groove matched with the tail end of the puncture sleeve. When the tail end of the puncture sleeve slides into the abutting groove on the tailstock and abuts against the tailstock, the conveying core pushes the blocking piece to push out from the puncture sleeve; judging whether the plugging piece is implanted in place or not according to the method; i.e. after the plugging piece is implanted in place, the tail end of the puncture sleeve is abutted into the abutting groove on the tailstock.

Preferably, the tailstock is cylindric, support the inslot and be equipped with the dog, puncture sheathed tube tail end be equipped with dog complex keep off the groove, just the degree of depth that keeps off the groove is greater than or equal to the length of shutoff piece. The stopper is rotated to be in the same length direction with the baffle slot, the tailstock is fixed again and the puncture sleeve is retracted, so that the plugging piece is exposed, a first barb on the plugging piece is barbed in the body, then the puncture sleeve and the conveying core are taken out, and under the action of the first barb, the plugging piece is separated from the placing cavity, so that the plugging piece is implanted to a designated position.

Preferably, the puncture needle also comprises a needle core which is in sliding fit with the through hole, and the needle core and the head end of the puncture sleeve are respectively provided with inclined planes which are parallel to each other. The puncture operation is completed by inserting the needle core into the puncture cannula and enabling the needle core and the inclined plane of the head end of the puncture cannula to be on the same plane.

Compared with the prior art, the utility model has at least the following advantages:

1. according to the utility model, after lumbar puncture is completed, a puncture needle is taken out and a puncture sleeve is kept motionless, then one end of a blocking piece, which is not provided with a first barb, is arranged in a placing cavity of a conveying core, one end of the blocking piece, which is provided with the first barb, is positioned outside the placing cavity, then the conveying core and the blocking piece are simultaneously placed in a through hole of the puncture sleeve, the conveying core pushes the blocking piece to slide in the puncture sleeve, the blocking piece is guided by the puncture sleeve, after the blocking piece enters a blocking position, the conveying core is pulled out, under the contact of the first barb and skin, the first barb is embedded into the skin, the blocking piece is separated from the conveying core, after the conveying core is pulled out, the puncture sleeve is pulled out, so that implantation of the blocking piece is completed, the blocking piece blocks a dura mater at the lumbar puncture position, and cerebrospinal fluid in the dura mater sac can be effectively prevented from escaping through a puncture hole. The lumbar puncture postcerebrospinal fluid leakage prevention device is simple to operate, and can be used for plugging the dura mater through the existing puncture sleeve after the lumbar puncture is completed.

2. The collagen dense membrane, gelatin-based sponge, shaping member, first barb and second barb are capable of degrading in vivo, thereby eliminating the need to remove the closure member.

Drawings

In order to more clearly illustrate the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.

Fig. 1 is a perspective view of a lumbar puncture anti-leakage device according to an embodiment of the present utility model.

Fig. 2 is a perspective view of a puncture cannula according to an embodiment of the present utility model.

Fig. 3 is a perspective view of a conveying core provided in an embodiment of the present utility model.

Fig. 4 is a perspective view of a closure provided in an embodiment of the present utility model.

Reference numerals: 1-puncture sleeve, 11-through hole, 12-baffle slot, 13-second mark, 2-conveying core, 21-placing cavity, 22-film sleeve, 23-tailstock, 24-baffle slot, 25-baffle block, 26-first mark, 3-blocking piece, 31-gelatin-based sponge, 32-collagen compact film, 33-first barb, 34-second barb, 4-shaping piece 41-shaping column, 42-limit column and 43-groove.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

In the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1-4, embodiments provided by the present utility model: lumbar puncture postcerebrospinal fluid leakage prevention device, comprising: a puncture cannula 1, a delivery core 2 and a closure 3; the puncture sleeve 1 is coaxially provided with a through hole 11; the conveying core 2 is in sliding fit with the through hole 11, and a placing cavity 21 is arranged at one end of the conveying core 2; the side of shutoff piece 3 one end with place the chamber 21 sliding fit, and the diameter of shutoff piece 3 is less than the diameter of placing the chamber 21, the side of shutoff piece 3 other end is equipped with first barb 33, first barb 33 orientation shutoff piece 3's one end.

During the implementation, after the lumbar puncture is completed, the puncture needle is taken out and the puncture sleeve 1 is kept motionless, then one end of the plugging piece 3, which is not provided with the first barb 33, is installed in the placing cavity 21 of the conveying core 2, and one end of the plugging piece 3, which is provided with the first barb 33, is located outside the placing cavity 21, then the conveying core 2 and the plugging piece 3 are simultaneously placed in the through hole 11 of the puncture sleeve 1, the conveying core 2 pushes the plugging piece 3 to slide in the puncture sleeve 1, the plugging piece 3 is guided by the puncture sleeve 1, after the plugging piece 3 enters the plugging position, the conveying core 2 is pulled out, the first barb 33 is embedded into the skin under the contact of the first barb 33 and the skin, so that the plugging piece 3 is separated from the conveying core 2, after the conveying core 2 is pulled out, the puncture sleeve 1 is pulled out, the implantation of the plugging piece 3 is completed, the hard spinal film at the lumbar puncture position is plugged by the plugging piece 3, and cerebrospinal fluid in the hard spinal film can be effectively prevented from escaping through the puncture hole. The lumbar puncture postcerebrospinal fluid leakage prevention device is simple to operate, and can be used for plugging the dura mater through the puncture sleeve 1 after the lumbar puncture is completed.

Referring to fig. 1 and 4, in other embodiments, the occluding component 3 comprises a gelatin-based sponge 31, a collagen dense membrane 32, and a shaping component 4; collagen compact membranes 32 are arranged on both sides of the gelatin-based sponge 31 in the length direction; the shaping piece 4 comprises a shaping column 41 and a limiting column 42; the shaping column 41 penetrates through the gelatin-based sponge 31 and the collagen compact membrane 32 in the length direction of the gelatin-based sponge 31, and two ends of the shaping column 41 are fixedly connected with limiting columns 42 respectively, wherein the diameter of the limiting columns 42 is the same as that of the gelatin-based sponge 31; the first barb 33 is secured to one of the stop posts 42.

In the specific implementation, the gelatin-based sponge 31 and the collagen compact film 32 are compacted and compounded, and the gelatin-based sponge 31 is softer, and is supported and shaped through the shaping column 41, so that the gelatin-based sponge 31 can be firmly installed on the shaping column 41 between the two limiting columns 42, the plugging piece 3 is conveniently implanted, and meanwhile, the first barbs 33 can be fixed through the limiting columns 42. And the gelatin-based sponge 31 and the collagen dense membrane 32 are degradable in the organism, so that the gelatin-based sponge 31 and the collagen dense membrane 32 do not need to be taken out, and after the plugging piece 3 is implanted in the organism, the gelatin-based sponge 31 can drive the collagen dense membrane 32 to open so as to plug the puncture.

Referring to fig. 1 and 4, in other embodiments, a second barb 34 is fixedly mounted on the other stopper post 42, the second barb 34 being opposite in orientation to the first barb 33; grooves 43 are formed below the first barbs 33 and the second barbs 34, the grooves 43 are located on the side faces of the limiting posts 42, and the grooves 43 are matched with the first barbs 33 and the second barbs 34. Specifically, the first barb 33, the second barb 34 and the shaping member 4 are made of the same material as the barb wire, and the first barb 33, the second barb 34 and the shaping member 4 are made of non-biological absorbable polymer materials, such as polydioxanone, copolymer of ethylene glycol acid and propylene carbonate, and can be other materials capable of being degraded and absorbed in organisms. In specific implementation, the second barbs 34 are provided with two rows, and the second barbs 34 are arranged in the placing cavity 21 after being clamped into the grooves 43, so that the implantation of the plugging piece 3 is not affected by the second barbs 34; simultaneously, the first barb 33 and the second barb 34 that the symmetry set up can carry out spacingly to the shutoff piece 3, effectually prevented that shutoff piece 3 from sliding towards both ends.

Referring to fig. 1-3, in other embodiments, the delivery core 2 includes a film sleeve 22, where the film sleeve 22 is coaxially and fixedly connected to one end of the delivery core 2, and a placement cavity 21 is located within the film sleeve 22. The thin film sleeve 22 drives the plugging piece 3 to move, and the thin film sleeve 22 can be elastically deformed in a self-adaptive mode according to the appearance of the plugging piece 3, so that the plugging piece 3 is not pressed and deformed. Specifically, the film cover 22 may be a plastic film of a material for medical use.

Referring to fig. 1-4, in other embodiments, a tail seat 23 is provided at an end of the delivery core 2 away from the placement cavity 21, and a supporting groove 24 matched with the tail end of the puncture cannula 1 is provided on the tail seat 23. In specific implementation, the tail seat 23 is pushed to move, and when the tail end of the puncture cannula 1 slides into the abutting groove 24 on the tail seat 23 and abuts against the tail seat 23, the conveying core 2 just pushes the blocking piece 3 to be pushed out of the puncture cannula 1; to determine if the closure member 3 is implanted in place; i.e. after the plugging piece 3 is implanted in place, the tail end of the puncture cannula 1 is abutted into the abutting groove 24 on the tailstock 23.

Referring to fig. 1-4, in other embodiments, the tailstock 23 is cylindrical, the abutment groove 24 is provided with a stop 25, the tail end of the puncture cannula 1 is provided with a stop groove 12 matched with the stop 25, and the depth of the stop groove 12 is greater than or equal to the length of the plugging piece 3. In practice, when the stop 25 abuts against the tail end of the puncture cannula 1, the blocking member 3 is moved to the implantation position; then, the tailstock 23 is rotated, the stop block 25 is rotated to be in the same length direction with the blocking groove 12, the tailstock 23 is fixed again, the puncture sleeve 1 is retreated, the blocking piece 3 is exposed, the first barb 33 on the blocking piece 3 is barbed in the body, then the puncture sleeve 1 and the conveying core 2 are taken out, and under the action of the first barb 33, the blocking piece 3 is separated from the placing cavity 21, so that the blocking piece 3 is implanted to a designated position.

Specifically, be equipped with first mark 26 in the tailstock 23 outside, first mark 26 and dog 25 are in same length direction, puncture sleeve 1's tail end is equipped with second mark 13, second mark 13 and keep off the groove 12 in same length direction, when rotating tailstock 23, first mark 26 and second mark 13 are in same length direction, it is rotatory to be in same length direction with keeping off the groove 12 to represent dog 25, then can fix tailstock 23 and retreat puncture sleeve 1, first mark 26 and the setting of second mark 13, can make when rotatory tailstock 23, can audio-visual observation dog 25 to with keep off the groove 12 in length direction, make more convenient when carrying out the shutoff.

In a further embodiment, the puncture cannula further comprises a needle core, the needle core is in sliding fit with the through hole 11, and the needle core and the head end of the puncture cannula 1 are respectively provided with inclined planes which are parallel to each other. In specific implementation, the puncture operation is completed by inserting the needle core into the puncture cannula 1 and enabling the inclined planes of the needle core and the head end of the puncture cannula 1 to be on the same plane.

The working principle and the using flow of the utility model are as follows:

firstly, inserting a needle core into a puncture cannula 1, and enabling the needle core and an inclined plane of the head end of the puncture cannula 1 to be on the same plane so as to complete the puncture operation; and then taking out the needle core, and performing operations such as collecting cerebrospinal fluid, measuring pressure, spraying medicine and the like. After the operations such as collecting cerebrospinal fluid are completed, in order to effectively avoid the escape of the dura mater through the needle hole caused by puncture, the needle hole at the puncture position needs to be plugged.

Keeping the puncture cannula 1 still, installing the limit post 42 provided with the second barb 34 in the placing cavity 21 of the conveying core 2, enabling the gelatin-based sponge 31, the collagen compact membrane 32 and the limit post 42 provided with the first barb 33 to be located outside the placing cavity 21, then simultaneously placing the conveying core 2 and the plugging piece 3 into the through hole 11 of the puncture cannula 1, enabling the conveying core 2 to push the plugging piece 3 to slide in the puncture cannula 1, guiding the plugging piece 3 through the puncture cannula 1, enabling the first mark 26 to be misaligned with the second mark 13, enabling the head end of the plugging piece 3 to be flush with the tip of the puncture cannula after the tail end of the puncture cannula 1 slides into the abutting groove 24 on the tailstock 23 and abuts against the stop 25 in the tailstock 23, and representing that the plugging piece 3 moves to an implantation position, namely, the gelatin-based sponge 31, the collagen compact membrane 32 and the limit post 42 provided with the first barb 33 are in the dural.

Then, the tailstock 23 is rotated, the first mark 26 and the second mark 13 are aligned, the first mark 26 and the second mark 13 are in the same length direction, the stop 25 is rotated to be in the same length direction as the baffle slot 12, the tailstock 23 is fixed again, the puncture sleeve 1 is retracted, the stop 25 is slid into the abutting slot 24, the gelatin-based sponge 31, the collagen compact film 32 and the limit post 42 provided with the first barb 33 are exposed out of the puncture sleeve 1, the gelatin-based sponge 31, the collagen compact film 32 absorb water and expand and the first barb 33 are barbed in a needle hole on the dura mater, then the puncture sleeve 1 and the conveying core 2 are simultaneously extracted, the limit post 42 provided with the second barb 34 and the second barb 34 are separated from the placing cavity 21, and the second barb 34 is embedded into subcutaneous tissue and ligament, so that the blocking piece 3 is implanted into a designated position, and the blocking of the puncture needle hole on the dura mater is completed.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.

Claims (7)

1. Lumbar vertebra puncture postcerebrospinal fluid leakage prevention device, its characterized in that includes: a puncture cannula (1), a delivery core (2) and a closure member (3);

a through hole (11) is coaxially arranged on the puncture sleeve (1);

the conveying core (2) is in sliding fit with the through hole (11), and a placing cavity (21) is formed at one end of the conveying core (2);

the side of shutoff piece (3) one end with place chamber (21) sliding fit, just the diameter of shutoff piece (3) is less than place the diameter in chamber (21), the side of shutoff piece (3) other end is equipped with first barb (33), first barb (33) are towards the one end of shutoff piece (3).

2. The lumbar postpuncture cerebrospinal fluid leakage prevention device according to claim 1, wherein said blocking member (3) comprises a gelatin-based sponge (31), a collagen dense film (32) and a shaping member (4); collagen compact membranes (32) are arranged on two sides of the gelatin-based sponge (31) in the length direction; the shaping piece (4) comprises a shaping column (41) and a limiting column (42); the sizing column (41) penetrates through the gelatin-based sponge (31) and the collagen compact membrane (32) in the length direction of the gelatin-based sponge (31), the limiting columns (42) are fixedly connected to the two ends of the sizing column (41) respectively, and the diameter of the limiting columns (42) is the same as that of the gelatin-based sponge (31); the first barbs (33) are fixedly arranged on one of the limit posts (42).

3. The lumbar puncture cerebrospinal fluid leakage prevention device according to claim 2, wherein a second barb (34) is fixedly mounted on the other limit post (42), and the second barb (34) is opposite to the first barb (33); grooves (43) are formed in the lower portions of the first barbs (33) and the second barbs (34), the grooves (43) are located on the side faces of the limiting columns (42), and the grooves (43) are matched with the first barbs (33) and the second barbs (34).

4. The lumbar puncture postcerebrospinal fluid leakage prevention device according to claim 1, wherein said delivery core (2) comprises a film sleeve (22), said film sleeve (22) is coaxially and fixedly connected with one end of said delivery core (2), and a placement cavity (21) is provided in said film sleeve (22).

5. The lumbar puncture cerebrospinal fluid leakage prevention device according to claim 1, wherein a tailstock (23) is arranged at one end of the conveying core (2) far away from the placing cavity (21), and a supporting groove (24) matched with the tail end of the puncture cannula (1) is arranged on the tailstock (23).

6. The lumbar puncture postcerebrospinal fluid leakage prevention device according to claim 5, wherein the tailstock (23) is cylindrical, a stop block (25) is arranged in the supporting groove (24), a blocking groove (12) matched with the stop block (25) is arranged at the tail end of the puncture sleeve (1), and the depth of the blocking groove (12) is larger than or equal to the length of the blocking piece (3).

7. The lumbar puncture postcerebrospinal fluid leakage prevention device according to claim 1, further comprising a needle core, wherein the needle core is in sliding fit with the through hole (11), and the needle core and the head end of the puncture cannula (1) are respectively provided with inclined planes which are parallel to each other.

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