A lumbar puncture needle

Abstract

This invention relates to a lumbar puncture needle, belonging to the field of medical device technology. It solves the problem in existing technologies where the lumbar puncture needle lacks a sealing measure before connecting to a pressure gauge, easily leading to needle contamination or fluid leakage during puncture. This invention includes a syringe and a needle body. The needle body is mounted on the syringe, which is used for drainage during puncture, while the needle body is used for spinal puncture. The first sleeve of this invention can be inserted into a valve-opening sleeve to connect the pressure gauge to the syringe. Simultaneously, the valve-opening lever can connect to the crimping end of the valve core and push the valve core towards the syringe, causing the sealing block to detach from the valve core's outer sleeve. This opens the valve module, allowing the liquid inside the syringe to enter the pressure gauge through the hollow part of the valve core's outer sleeve, the valve core's liquid transmission hole, the valve-opening sleeve, and the lever's liquid transmission hole. The pressure gauge can then measure pressure. The connection method is convenient and quick, and it ensures that the syringe does not leak when the pressure gauge is not connected.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a lumbar puncture needle. Background Technology

[0002] In certain emergency situations where intracranial pressure rises sharply, such as acute hydrocephalus, slowly releasing a suitable amount of cerebrospinal fluid via lumbar puncture can temporarily reduce intracranial pressure, alleviate symptoms, and buy time for further diagnosis and treatment. However, this procedure must be performed with extreme caution, as releasing too much or too quickly cerebrospinal fluid may lead to serious complications such as brain herniation.

[0003] Therefore, the lumbar puncture needle needs to be equipped with a pressure measurement function.

[0004] To connect to a pressure gauge, lumbar puncture needles typically have a specific interface design. First, it's crucial to ensure that the connection interface matches the pressure gauge's specifications. The shape of the interface is also critical; a common type is the Luer-lok interface. This interface has a standard taper and thread design, ensuring a tight seal and stability. During connection, the Luer-lok interface of the lumbar puncture needle must be perfectly aligned with the corresponding Luer-lok interface on the pressure gauge, and then rotated to lock it in place. However, before connecting the pressure gauge, the lumbar puncture needle lacks a sealing mechanism, making it susceptible to contamination or leakage of bodily fluids during puncture. Summary of the Invention

[0005] To address the aforementioned shortcomings of the prior art, the present invention provides a lumbar puncture needle that solves the problem that the lumbar puncture needle lacks a sealing measure before connecting to the pressure gauge, which can easily lead to needle contamination or bodily fluid leakage during puncture.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0007] The present invention provides a lumbar puncture needle, including a syringe and a puncture needle body. The puncture needle body is disposed on the syringe, which is used for drainage during puncture, and the puncture needle body is used for spinal puncture.

[0008] Furthermore, the puncture needle body is a hollow needle body.

[0009] Furthermore, it also includes solid needles, all of which are mounted on the syringe. The solid needles are used to block the puncture needle body during lumbar puncture.

[0010] Furthermore, the syringe includes a cylindrical body, which is a straight cylindrical shape.

[0011] Furthermore, the puncture needle body is a soft needle body.

[0012] Furthermore, a solid needle includes a solid needle body and a needle hub.

[0013] Furthermore, the solid needle body is a rigid needle body.

[0014] Furthermore, it also includes a sealing unit, which is disposed on the syringe.

[0015] Furthermore, the sealing unit includes a sealing seat, a connecting rod, and a sealing ring, with the connecting rod disposed on the sealing seat.

[0016] Furthermore, the syringe includes a sealing groove, a connecting rod that can be threaded into the sealing groove, and a sealing ring disposed within the sealing groove.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] (1) The first cylinder of the present invention can be inserted into the valve opening sleeve to connect the pressure gauge and the syringe. At the same time, the valve opening rod can be connected to the crimping end of the valve core and push the valve core towards the cylinder body, so that the sealing block is separated from the valve core outer sleeve, thereby realizing the valve module opening. The liquid in the cylinder body is transmitted to the pressure gauge through the hollow part of the valve core outer sleeve, the valve core liquid transmission hole, the valve opening sleeve and the pressure rod liquid transmission hole. The pressure gauge can measure the pressure. The connection method is convenient and quick, and it can ensure that the syringe does not leak when the pressure gauge is not connected.

[0019] (2) The connecting rod of the puncture needle of the present invention is a hollow connecting rod. The solid needle can pass through the connecting rod and the sealing ring and enter the syringe. The needle seat can be connected to the sealing seat. Rotating the sealing seat can drive the connecting rod to rotate into the sealing groove, thereby squeezing the sealing ring, reducing the inner diameter of the sealing ring and expanding the outer diameter, thereby sealing the syringe and preventing the liquid in the syringe 1 from flowing out of the syringe and preventing the puncture needle of this embodiment from depressurizing.

[0020] (3) The positioning protrusion of the present invention can be connected with the positioning groove. The user does not need to adjust the solid needle body at the opening of the puncture needle body. The user only needs to connect the protrusion with the positioning groove to automatically align the inclined end faces of the puncture needle body and the solid needle body, saving puncture operation time and reducing the user's workload.

[0021] (4) The limiting bead of the present invention is used to prevent the first part of the cylinder from separating from the valve opening sleeve, and to maintain the connection between the pressure gauge and the syringe. The first part of the cylinder can press the unlocking sleeve and make the limiting bead separate from the limiting bead hole and connect with the positioning ring groove to prevent the first part of the cylinder from separating from the valve opening sleeve. Only by pulling the quick-connect sleeve towards the pressure gauge can the valve opening sleeve and the first part of the cylinder be separated, and the sealing block automatically seals the valve core sleeve. The quick-release action is simple and fast, saving the user's operation time.

[0022] (5) The drainage valve of the present invention is used to drain from inside the spine to outside through the cylinder; the limiting member is provided on the second cylinder and can slide along the inner wall of the second cylinder; the surface of the valve body is provided with a limiting groove; one end of the limiting member can be connected to the solid needle body, and the other end of the limiting member can be connected to the limiting groove; due to the restriction of the solid needle body, the limiting member cannot move towards the cylinder, and the valve body cannot rotate; even if the drainage valve is accidentally touched, it can ensure that the valve body does not rotate and will not cause the drainage valve to open.

[0023] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and drawings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the puncture needle;

[0025] Figure 2 This is a cross-sectional view of the sealing unit.

[0026] Figure 3 for Figure 2 Enlarged structural diagram of region A in the middle;

[0027] Figure 4 A cross-sectional view of the transfer unit in its separated state;

[0028] Figure 5 A cross-sectional view of the transition unit in its connected state;

[0029] Figure 6 This is a schematic diagram of the cross-sectional structure of the drainage valve.

[0030] Figure label:

[0031] 1-Syringe; 2-Puncture needle body; 3-Solid needle; 4-Sealing unit; 5-Transfer unit; 6-Drainage valve; 11-Cylinder body; 12-First sub-cylinder; 13-Positioning ring groove; 14-Second sealing ring; 15-Second sub-cylinder; 31-Solid needle body; 32-Needle seat; 33-Positioning protrusion; 41-Sealing seat; 42-Connecting rod; 43-Sealing ring; 44-Sheath; 45-Positioning groove; 61-Valve body ; 62-Drainage hole; 63-Limiting element; 100-Pressure gauge; 501-Valve core outer sleeve; 502-Valve core; 503-Sealing block; 504-Valve spring; 505-Valve opening sleeve; 506-Valve opening rod; 507-Limiting bead; 508-Unlocking sleeve; 509-Inner pressure spring; 510-Quick-connect sleeve; 511-Quick-connect pressure spring; 512-Limiting bead annular groove; 513-First sealing ring. Detailed Implementation

[0032] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0033] Example 1:

[0034] like Figure 1 As shown, a lumbar puncture needle (hereinafter referred to as puncture needle) includes a syringe 1, a puncture needle body 2 and a solid needle 3. The puncture needle body 2 and the solid needle 3 are both disposed on the syringe 1. The puncture needle body 2 is a hollow needle body. The solid needle 3 is used to block the puncture needle body 2 during lumbar puncture. The syringe 1 is used for drainage during puncture.

[0035] Preferably, the syringe 1 includes a cylindrical body 11, which is a straight cylinder for easy gripping and operation.

[0036] Preferably, the puncture needle body 2 is a soft needle body, which can reduce damage to human tissues during puncture.

[0037] Preferably, the solid needle 3 includes a solid needle body 31 and a needle base 32. The solid needle body 31 is a rigid needle body. The solid needle body 31 is used to keep the puncture needle body 2 in a straight shape during puncture, which facilitates the puncture operation.

[0038] Preferably, the puncture needle in this embodiment further includes a sealing unit 4, which is disposed on the syringe 1 and is used to seal the syringe 1.

[0039] Preferably, Figure 2 As shown, the sealing unit 4 includes a sealing seat 41, a connecting rod 42, and a sealing ring 43. The connecting rod 42 is disposed on the sealing seat 41. The syringe 1 includes a sealing groove, the connecting rod 42 can be threadedly connected to the sealing groove, and the sealing ring 43 is disposed in the sealing groove. The connecting rod 42 is a hollow connecting rod, and the solid needle body 31 can pass through the connecting rod 42 and the sealing ring 43 and enter the syringe 1. The needle seat 32 can be connected to the sealing seat 41. Rotating the sealing seat 41 can drive the connecting rod 42 to screw into the sealing groove, thereby squeezing the sealing ring 43, reducing the inner diameter of the sealing ring 43 and expanding its outer diameter, thereby sealing the syringe 1 and preventing the liquid in the syringe 1 from flowing out of the syringe 1, thus causing the puncture needle in this embodiment to depressurize.

[0040] Preferably, the sealing unit 4 further includes a sheath 44, which is disposed on the sealing seat 41. The sheath 44 can be connected to the outer wall of the syringe 1. The sheath 44 is used to protect the sealing groove and prevent foreign objects from entering the sealing groove.

[0041] To facilitate the insertion of the puncture needle 2 into the human body, both the puncture needle 2 and the solid needle body 31 have inclined end faces. When the solid needle body 31 is inserted into the puncture needle 2, the inclined end faces of the puncture needle 2 and the solid needle body 31 must be aligned to form an inclined end face, so that the puncture needle 2 can be smoothly inserted into the human body. Preferably, as follows... Figure 3 As shown, to align the inclined end faces of the puncture needle body 2 and the solid needle body 31, the solid needle 3 also includes a positioning protrusion 33, which is disposed on the needle seat 32. The sealing unit 4 also includes a positioning groove 45, which is disposed on the sealing seat 41. The positioning protrusion 33 can connect with the positioning groove 45, so the user does not need to adjust the solid needle body 31 at the opening of the puncture needle body 2. Simply connecting the positioning protrusion 33 with the positioning groove 45 will automatically align the inclined end faces of the puncture needle body 2 and the solid needle body 31, saving puncture operation time and reducing the user's workload.

[0042] Preferably, Figure 1 and Figure 2 As shown, the puncture needle in this embodiment is a medical consumable and is for single use. To measure the pressure of the fluid within the lumbar spine, the puncture needle in this embodiment also includes an adapter unit 5, which connects the puncture needle to a non-disposable pressure gauge 100. The syringe 1 also includes a first sub-cylinder 12, which is disposed on and communicates with the syringe body 11. The adapter unit 5 is connected to the first sub-cylinder 12. The pressure gauge 100 measures the fluid pressure within the syringe body 11, which is the same as the fluid pressure within the lumbar spine. The pressure gauge 100 can display the fluid pressure within the lumbar spine.

[0043] Preferably, Figure 4 and Figure 5 As shown, the transfer unit 5 includes a valve opening module and a valve module. When the valve opening assembly is connected to the valve module, the liquid in the cylinder 11 can flow into the pressure gauge 100 through the transfer unit 5. The pressure gauge 100 can measure the liquid pressure in the cylinder 11.

[0044] Preferably, the valve module includes a valve core outer sleeve 501, a valve core 502, and a sealing block 503. The valve core outer sleeve 501 is connected to the inner wall of the first sub-tube 12. The valve core outer sleeve 501 includes a hollow portion, the inner diameter of which is larger than the outer diameter of the valve core 502. The valve core 502 is disposed on the first sub-tube 12 and passes through the hollow portion of the valve core outer sleeve 501. The sealing block 503 is disposed at one end of the valve core 502, and the other end of the valve core 502 is a crimped end. The sealing block 503 is used to seal the valve core outer sleeve 501 to prevent liquid in the cylinder 11 from flowing out of the syringe 1 through the hollow portion of the valve core outer sleeve 501.

[0045] Preferably, the valve module further includes a valve spring 504, which is disposed between the first sub-cylinder 12 and the valve core 502. One end of the valve spring 504 is connected to the valve core 502, and the other end is connected to the valve core outer sleeve 501. The valve spring 504 is used to disengage the valve core 502 from the valve core outer sleeve 501, thereby keeping the sealing block 503 blocking the valve core outer sleeve 501 and maintaining the valve module in a closed state. The valve core 502 is provided with a valve core liquid transmission hole. Pressing the crimped end of the valve core 502 allows the sealing block 503 to disengage from the valve core outer sleeve 501, thereby opening the valve module. The liquid inside the cylinder 11 flows out of the syringe 1 through the hollow part of the valve core outer sleeve 501 and the valve core liquid transmission hole.

[0046] Preferably, the valve opening module includes a valve opening sleeve 505 and a valve opening rod 506. The valve opening sleeve 505 is connected to the pressure gauge 100. The valve opening rod 506 is disposed on the inner wall of the valve opening sleeve 505, and the outer diameter of the valve opening rod 506 is smaller than the inner diameter of the valve opening sleeve 505. A pressure rod transmission hole is provided on the valve opening rod 506, and liquid can be transmitted to the pressure gauge 100 through the valve opening sleeve 505 and the pressure rod transmission hole.

[0047] Preferably, the first sleeve 12 can be inserted into the valve opening sleeve 505 to connect the pressure gauge 100 to the syringe 1. At the same time, the valve opening lever 506 can be connected to the crimping end of the valve core 502 and push the valve core 502 towards the cylinder 11, so that the sealing block 503 is disengaged from the valve core outer sleeve 501, thereby realizing the valve module opening. The liquid in the cylinder 11 is transmitted to the pressure gauge 100 through the hollow part of the valve core outer sleeve 501, the valve core liquid transmission hole, the valve opening sleeve 505 and the lever liquid transmission hole. The pressure gauge 100 can measure the pressure. The connection method is convenient and quick, and it can ensure that the syringe 1 does not leak when the pressure gauge 100 is not connected.

[0048] Preferably, the syringe 1 further includes a positioning ring groove 13, which is disposed on the outer wall of the first sub-cylinder 12. The valve opening sleeve 505 is provided with a limiting bead hole, which is a through hole. The valve opening module also includes a limiting bead 507, which is disposed on the limiting bead hole. The positioning ring groove 13 can connect with the limiting bead 507. The limiting bead 507 is used to prevent the first sub-cylinder 12 from disengaging from the valve opening sleeve 505, thus maintaining the connection between the pressure gauge 100 and the syringe 1.

[0049] Preferably, to prevent the limiting bead 507 from disengaging from the limiting bead hole, the valve opening module further includes an unlocking sleeve 508 and an inner pressure spring 509. The unlocking sleeve 508 is disposed between the valve opening sleeve 505 and the valve opening rod 506, and the unlocking sleeve 508 can slide along the inner wall of the valve opening sleeve 505. The unlocking sleeve 508 is used to block the limiting bead hole, preventing the limiting bead 507 from disengaging from the limiting bead hole in the direction of the valve opening rod 506. One end of the inner pressure spring 509 is connected to the valve opening rod 506, and the other end of the inner pressure spring 509 is connected to the unlocking sleeve 508. The inner pressure spring 509 is used to push the unlocking sleeve 508, so that the unlocking sleeve 508 keeps blocking the limiting bead hole. The first sub-cylinder 12 can press the unlocking sleeve 508 and cause the limiting bead 507 to disengage from the limiting bead hole and connect with the positioning ring groove 13, preventing the first sub-cylinder 12 from disengaging from the valve opening sleeve 505.

[0050] Preferably, to prevent the limiting bead 507 from disengaging from the limiting bead hole in a direction away from the valve rod 506, the valve opening module further includes a quick-connect sleeve 510 and a quick-connect spring 511. The quick-connect sleeve 510 is sleeved on the outer wall of the valve opening sleeve 505. One end of the quick-connect spring 511 is connected to the valve opening sleeve 505, and the other end of the quick-connect spring 511 is connected to the quick-connect sleeve 510. The quick-connect spring 511 is used to push the quick-connect sleeve 510 to disengage from the valve opening sleeve 505. A limiting bead annular groove 512 is formed on the inner wall of the quick-connect sleeve 510. The diameter of the limiting bead 507 is larger than the wall thickness of the valve opening sleeve 505. The limiting bead annular groove 512 is used to accommodate the portion of the limiting bead 507 that protrudes from the limiting bead hole. The limiting bead 507 prevents the quick-connect sleeve 510 from disengaging from the valve opening sleeve 505.

[0051] When a quick connection is made, the first sleeve 12 is inserted into the valve opening sleeve 505, and the valve opening rod 506 pushes the valve core 502 towards the cylinder 11, causing the sealing block 503 to disengage from the valve core outer sleeve 501, thereby opening the valve module; the first sleeve 12 pushes the unlocking sleeve 508, causing the unlocking sleeve 508 to slide along the inner wall of the valve opening sleeve 505, and the limiting bead 507 disengages from the limiting bead hole towards the valve opening rod 506. The limiting bead 507 connects with the positioning ring groove 13 to prevent the first sleeve 12 from disengaging from the valve opening sleeve 505; the quick-connect sleeve 510 moves towards the first sleeve 12 and seals the limiting bead hole to prevent the limiting bead 507 from disengaging from the positioning ring groove 13, completely locking the connection between the valve opening sleeve 505 and the first sleeve 12. The liquid inside the cylinder 11 is transmitted to the pressure gauge 100 through the hollow part of the valve core outer sleeve 501, the valve core liquid transmission hole, the valve opening sleeve 505, and the pressure rod liquid transmission hole for pressure measurement.

[0052] During quick disassembly, pull the quick-connect sleeve 510 towards the pressure gauge 100 to connect the limit bead annular groove 512 with the opening of the limit bead hole. The limit bead 507 can move towards the limit bead annular groove 512 and disengage from the positioning annular groove 13, thus unlocking the connection between the valve opening sleeve 505 and the first sub-tube 12. Pull the first sub-tube 12 out of the valve opening sleeve 505, disengage the valve opening rod 506 from the valve core 502, and seal the valve core outer sleeve 501 with the sealing block 503. The unlocking sleeve 508 slides along the inner wall of the valve opening sleeve 505, allowing the limit bead 507 to enter the limit bead hole in a direction away from the valve rod 506, thus completing the separation of the valve opening sleeve 505 and the first sub-tube 12. Simply pull the quick-connect sleeve 510 towards the pressure gauge 100 to separate the valve opening sleeve 505 from the first branch sleeve 12, and the sealing block 503 automatically seals the valve core outer sleeve 501. The quick-release action is simple and fast, saving the user's operation time.

[0053] Preferably, in order to seal the adapter unit 5, the valve opening module further includes a first sealing ring 513 and a second sealing ring 14. The first sealing ring 513 is disposed on the end face of the unlocking sleeve 508 and is used to seal the unlocking sleeve 508 and the first sub-tube 12 to prevent liquid from leaking from the connection between the unlocking sleeve 508 and the first sub-tube 12. The second sealing ring 14 is disposed on the outer wall of the first sub-tube 12 and is used to seal the first sub-tube 12 and the valve opening sleeve 505 to prevent liquid from leaking from the connection between the valve opening sleeve 505 and the first sub-tube 12.

[0054] Compared to the prior art, the connecting rod 42 of the puncture needle in this embodiment is a hollow connecting rod, and the solid needle body 31 can pass through the connecting rod 42 and the sealing ring 43 and enter the syringe 1. The needle seat 32 can be connected to the sealing seat 41. Rotating the sealing seat 41 can drive the connecting rod 42 to rotate into the sealing groove, thereby squeezing the sealing ring 43, reducing the inner diameter of the sealing ring 43 and expanding the outer diameter, thereby sealing the syringe 1, preventing the liquid in the syringe 1 from flowing out of the syringe 1, and preventing the puncture needle of this embodiment from depressurizing. The positioning protrusion 33 can be connected to the positioning groove 45. The user does not need to adjust the solid needle body 31 at the opening of the puncture needle body 2. Simply connecting the protrusion 33 to the positioning groove 45 will automatically align the inclined end faces of the puncture needle body 2 and the solid needle body 31, saving puncture operation time and reducing the user's workload. The first dividing sleeve 12 can be inserted into the valve opening sleeve 505 to connect the pressure gauge 100 to the syringe 1. At the same time, the valve opening rod 506 can be connected to the crimping end of the valve core 502. The valve core 502 is pushed towards the cylinder 11, causing the sealing block 503 to disengage from the valve core outer sleeve 501, thereby opening the valve module. The liquid inside the cylinder 11 is transmitted to the pressure gauge 100 through the hollow part of the valve core outer sleeve 501, the valve core liquid transmission hole, the valve opening sleeve 505, and the pressure rod liquid transmission hole. The pressure gauge 100 can measure pressure. The connection method is convenient and quick, and it can ensure that the syringe 1 does not leak when the pressure gauge 100 is not connected. The limit bead 507 is used to prevent the first sub-cylinder 12 from detaching from the valve opening sleeve 505. The pressure gauge 100 is kept connected to the syringe 1. The first sub-cylinder 12 can press the unlocking sleeve 508 and cause the limit bead 507 to disengage from the limit bead hole and connect with the positioning ring groove 13 to prevent the first sub-cylinder 12 from disengaging from the valve opening sleeve 505. Simply pull the quick-connect sleeve 510 towards the pressure gauge 100 to separate the valve opening sleeve 505 from the first sub-cylinder 12. The sealing block 503 automatically seals the valve core outer sleeve 501. The quick-release action is simple and fast, saving the user's operation time.

[0055] Example 2:

[0056] Another specific embodiment of the puncture needle of the present invention adds a drainage valve 6 based on embodiment 1. The drainage valve 6 is used to drain from inside the spine to the outside through the cylinder 11.

[0057] Preferred, such as Figure 1 and Figure 6 As shown, the puncture needle in this embodiment also includes a drainage valve 6. The syringe 1 also includes a second sub-cylinder 15, which is disposed on the syringe body 11. The drainage valve 6 is disposed on the second sub-cylinder 15.

[0058] Preferably, the drain valve 6 is a ball valve, including a valve body 61 and a drain hole 62. The valve body 61 is a ball valve body, and the drain hole 62 passes through the valve body 61. Rotating the valve body 61 can connect or disconnect the drain hole 62 from the second sub-cylinder 15, forming an on / off drain valve 6.

[0059] Preferably, to prevent accidental activation of the drainage valve 6 and subsequent rotation of the valve body 61, thus opening the drainage valve 6, the drainage valve 6 further includes a limiting member 63. The limiting member 63 is disposed on the second sub-cylinder 15 and can slide along the inner wall of the second sub-cylinder 15. A limiting groove is provided on the surface of the valve body 61. One end of the limiting member 63 can connect to the solid needle body 31, and the other end of the limiting member 63 can connect to the limiting groove. Due to the restriction of the solid needle body 31, the limiting member 63 cannot move towards the cylinder 11, and the valve body 61 cannot rotate. Even if the drainage valve 6 is accidentally activated, it ensures that the valve body 61 will not rotate, preventing the drainage valve 6 from opening. When the solid needle body 31 is detached from the cylinder 11 and the valve body 61 is rotated, the valve body 61 can push the limiting member 63 towards the cylinder 11, thereby connecting the second sub-cylinder 15 and opening the drainage valve 6.

[0060] Preferably, the limiting element 63 is a limiting tube or a limiting rod.

[0061] Compared to Embodiment 1, the drainage valve 6 in this embodiment is used to drain fluid from inside the spine to the outside via the cylinder 11; the limiting member 63 is disposed on the second sub-cylinder 15 and can slide along the inner wall of the second sub-cylinder 15; the surface of the valve body 61 is provided with a limiting groove; one end of the limiting member 63 can be connected to the solid needle body 31, and the other end of the limiting member 63 can be connected to the limiting groove; due to the restriction of the solid needle body 31, the limiting member 63 cannot move towards the cylinder 11, and the valve body 61 cannot rotate; even if the drainage valve 6 is accidentally touched, it can be ensured that the valve body 61 does not rotate and will not cause the drainage valve 6 to open.

[0062] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A lumbar puncture needle, characterized in that, The device includes a syringe (1), a puncture needle body (2), a solid needle (3), a sealing unit (4), and a transfer unit (5). The puncture needle body (2) is mounted on the syringe (1), which is used for drainage during puncture, and the puncture needle body (2) is used for spinal puncture. The solid needle (3) is mounted on the syringe (1) and is used to block the puncture needle body (2) during lumbar puncture. The sealing unit (4) is mounted on the syringe (1). The sealing unit (4) includes a sealing seat (41), a connecting rod (42), and a sealing ring (43). The connecting rod (42) is disposed on the sealing seat (41). The syringe (1) includes a sealing groove, a cylindrical body (11), a first sub-cylinder (12), and a positioning ring groove (13). The connecting rod (42) can be threadedly connected to the sealing groove, and the sealing ring (43) is disposed in the sealing groove. The first sub-cylinder (12) is disposed on the cylindrical body (11) and communicates with the cylindrical body (11). The positioning ring groove (13) is disposed on the outer wall of the first sub-cylinder (12). The transfer unit (5) includes a valve opening module and a valve module. The valve module includes a valve core outer sleeve (501), a valve core (502), a sealing block (503), and a valve spring (504). The valve core outer sleeve (501) is connected to the inner wall of the first sub-tube (12). The valve core (502) is located on the first sub-tube (12) and passes through the hollow part of the valve core outer sleeve (501). The sealing block (503) is located at one end of the valve core (502), and the other end of the valve core (502) is a crimped end. The valve spring (504) is located between the first sub-tube (12) and the valve core (502). One end of the valve spring (504) is connected to the valve core (502), and the other end of the valve spring (504) is connected to the valve core outer sleeve (501). The valve spring (504) is used to disengage the valve core (502) from the valve core outer sleeve (501), thereby keeping the sealing block (503) blocking the valve core. The outer sleeve (501) maintains the valve module in the closed state; the valve core (502) is provided with a valve core liquid transmission hole; the valve opening module includes an opening sleeve (505) and an opening rod (506). The opening sleeve (505) is connected to the pressure gauge (100), and the opening rod (506) is set on the inner wall of the opening sleeve (505). The opening rod (506) is provided with a rod liquid transmission hole, and liquid can pass through the opening sleeve (505) and the rod. The pressure gauge (100) is fed through the liquid transmission hole; the valve opening sleeve (505) is provided with a limit bead hole, which is a through hole. The valve opening module also includes a limit bead (507), which is set on the limit bead hole. The positioning ring groove (13) can be connected to the limit bead (507). The limit bead (507) is used to prevent the first cylinder (12) from disengaging from the valve opening sleeve (505) and to maintain the connection between the pressure gauge (100) and the syringe (1).

2. The lumbar puncture needle according to claim 1, characterized in that, The puncture needle body (2) is a hollow needle body.

3. The lumbar puncture needle according to claim 1, characterized in that, The cylinder (11) is a straight cylindrical cylinder.

4. The lumbar puncture needle according to claim 2, characterized in that, The puncture needle body (2) is a soft needle body.

5. The lumbar puncture needle according to claim 1, characterized in that, The solid needle (3) includes a solid needle body (31) and a needle base (32).

6. The lumbar puncture needle according to claim 5, characterized in that, The solid needle body (31) is a hard needle body.

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