Lumbar puncture needle

Abstract

The invention relates to a lumbar puncture needle, belongs to the technical field of medical instruments, and solves the problems that in the prior art, before a pressure gauge is connected, a lumbar puncture needle is not sealed, and puncture needle pollution or body fluid leakage is easily caused during puncture. The spine puncture needle comprises a needle cylinder and a puncture needle body, the puncture needle body is arranged on the needle cylinder, the needle cylinder is used for drainage during puncture, and the puncture needle body is used for spine puncture. The first branch cylinder can be inserted into the valve opening sleeve to connect the pressure gauge with the needle cylinder, and meanwhile, the valve opening pressing rod can be connected with the pressing connection end of the valve element and push the valve element towards the cylinder body to enable the sealing block to be separated from the valve element outer sleeve, so that valve opening of the valve module is achieved; liquid in the cylinder is transmitted into the pressure gauge through the hollow portion of the valve element outer sleeve, the valve element liquid transmission hole, the valve opening sleeve and the pressing rod liquid transmission hole, the pressure gauge can measure pressure, the connection mode is convenient and fast, and it can be guaranteed that when the pressure gauge is not connected, the needle cylinder does not leak.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a lumbar puncture needle. Background Art

[0002] In some emergency situations where the intracranial pressure rises sharply, such as acute hydrocephalus, etc., by slowly releasing an appropriate amount of cerebrospinal fluid through a lumbar puncture needle, the intracranial pressure can be temporarily reduced, the symptoms of the patient can be relieved, and time can be gained for further diagnosis and treatment. However, this operation needs to be very cautious because releasing cerebrospinal fluid too quickly or too much may cause serious complications such as brain hernia.

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

[0004] In order to connect with a pressure gauge, the lumbar puncture needle usually has a specific interface design. First, it is necessary to ensure that its connection interface with the pressure gauge matches in specifications. The shape of the interface is also crucial. The common one is the Luer-lok interface. This interface has its standard taper and thread design, which can ensure the sealing and stability of the connection. When connecting, the Luer-lok interface of the lumbar puncture needle should be completely aligned with the corresponding Luer-lok interface of the pressure gauge, and then rotated and locked. However, before connecting the pressure gauge, the lumbar puncture needle has no sealing measure, and it is easy to cause puncture needle contamination or body fluid leakage during puncture. Summary of the Invention

[0005] Aiming at the above deficiencies of the prior art, the present invention provides a lumbar puncture needle, which is used to solve the problem that before connecting the pressure gauge, the lumbar puncture needle has no sealing measure and is easy to cause puncture needle contamination or body fluid leakage in the prior art.

[0006] In order to achieve the above invention purpose, the technical solution adopted by the present invention is as follows:

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

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

[0009] Further, it also includes a solid needle, and the solid needle is arranged on the syringe barrel. The solid needle is used to block the puncture needle body during lumbar puncture.

[0010] Further, the syringe barrel includes a barrel body, and the barrel body is a straight cylinder.

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

[0012] Further, the solid needle includes a solid needle body and a needle seat.

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

[0014] Further, it further includes a sealing unit, and the sealing unit is arranged on the syringe barrel.

[0015] Further, the sealing unit includes a sealing seat, a connecting rod and a sealing ring, and the connecting rod is arranged on the sealing seat.

[0016] Further, the syringe barrel includes a sealing groove, the connecting rod can be threadedly connected with the sealing groove, and the sealing ring is arranged in the sealing groove.

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

[0018] (1) The first sub-barrel of the present invention can be inserted into the valve-opening sleeve to connect the pressure gauge with the syringe barrel. At the same time, the valve-opening pressure rod can be connected with the pressing end of the valve core and push the valve core towards the barrel body, so that the closing block is separated from the valve core outer sleeve, thereby realizing the opening of the valve module. The liquid in the barrel body is introduced into the pressure gauge through the hollow part of the valve core outer sleeve, the liquid transmission hole of the valve core, the valve-opening sleeve and the liquid transmission hole of the pressure rod. The pressure gauge can measure the pressure. The connection method is convenient and fast, and it can ensure that the syringe barrel 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 barrel. The needle seat can be connected with the sealing seat; rotating the sealing seat can drive the connecting rod to screw into the sealing groove, thereby squeezing the sealing ring, reducing the inner diameter of the sealing ring and expanding the outer diameter, so as to block the syringe barrel and prevent the liquid in the syringe barrel 1 from flowing out of the syringe barrel, preventing the puncture needle in this embodiment from losing pressure.

[0020] (3) Through the positioning convex block of the present invention can be connected with the positioning groove, the user does not need to specifically adjust the solid needle body at the opening of the puncture needle body. Just connect the convex block with the positioning groove, and the inclined end faces of the puncture needle body and the solid needle body can be automatically aligned, saving the puncture operation time and reducing the working intensity of the user.

[0021] (4) The limit bead of the present invention is used to prevent the first sub-barrel from separating from the valve-opening sleeve, maintaining the connection between the pressure gauge and the syringe barrel. The first sub-barrel can press the unlocking sleeve, and the limit bead can be separated from the limit bead hole and connected with the positioning ring groove to prevent the first sub-barrel from separating from the valve-opening sleeve; only need to pull the quick-connect sleeve towards the pressure gauge direction, and the valve-opening sleeve and the first sub-barrel can be separated, and the closing block automatically blocks the valve core outer sleeve. The quick-disassembly action is simple and rapid, saving the operation time of the user.

[0022] (5) The drainage valve of the present invention is used for draining from the spine to the outside of the body via the cylinder; the limiting member is arranged on the second sub-cylinder and can slide along the inner wall of the second sub-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 limitation 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 the drainage valve will not be opened.

[0023] In the present invention, the above technical solutions can be combined with each other to achieve more preferred combination schemes. Other features and advantages of the present invention will be described in the following content. Moreover, some advantages can be made obvious from the specification or understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the content specifically pointed out in the text and the drawings. Brief Description of the Drawings

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

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the sealing unit;

[0026] Figure 3 It is Figure 2 an enlarged schematic diagram of area A in

[0027] Figure 4 It is a schematic diagram of the cross-sectional structure of the transfer unit in the separated state;

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of the transfer unit in the connected state;

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

[0030] Reference Signs:

[0031] 1 - syringe barrel; 2 - puncture needle body; 3 - solid needle; 4 - sealing unit; 5 - transfer unit; 6 - drainage valve; 11 - cylinder; 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 convex block; 41 - sealing seat; 42 - connecting rod; 43 - sealing ring; 44 - sheath; 45 - positioning groove; 61 - valve body; 62 - drainage hole; 63 - limiting member; 100 - pressure gauge; 501 - valve core outer sleeve; 502 - valve core; 503 - closing block; 504 - valve spring; 505 - valve opening sleeve; 506 - valve opening pressure rod; 507 - limiting bead; 508 - unlocking sleeve; 509 - inner pressure spring; 510 - quick-connect sleeve; 511 - quick-connect pressure spring; 512 - limiting bead ring groove; 513 - first sealing ring. Detailed implementation manners

[0032] The following describes the detailed implementation manners of the present invention to facilitate the understanding of the present invention by those skilled in the art. It should be clear that the present invention is not limited to the scope of the detailed implementation manners. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions made using the concept of the present invention are within the scope of protection.

[0033] Embodiment 1:

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

[0035] Preferably, the syringe barrel 1 includes a barrel body 11, and the barrel body 11 is a straight cylinder, which is convenient for holding and operating.

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

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

[0038] Preferably, the puncture needle of this embodiment further includes a sealing unit 4. The sealing unit 4 is arranged on the syringe barrel 1, and the sealing unit 4 is used to seal the syringe barrel 1.

[0039] Preferably, as Figure 2 shown, the sealing unit 4 includes a sealing seat 41, a connecting rod 42, and a sealing ring 43. The connecting rod 42 is arranged on the sealing seat 41. The syringe barrel 1 includes a sealing groove, and the connecting rod 42 can be threadedly connected to the sealing groove. The sealing ring 43 is arranged 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 barrel 1. The needle seat 32 can be connected to the sealing seat 41. By rotating the sealing seat 41, the connecting rod 42 can be driven to screw into the sealing groove, thereby squeezing the sealing ring 43, so that the inner diameter of the sealing ring 43 is reduced and the outer diameter is enlarged, thereby blocking the syringe barrel 1 and preventing the liquid in the syringe barrel 1 from flowing out of the syringe barrel 1, resulting in pressure relief of the puncture needle of this embodiment.

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

[0041] In order to facilitate the puncture needle body 2 to penetrate the human body, the puncture needle body 2 and the solid needle body 31 both have inclined end faces. When the solid needle body 31 is inserted into the puncture needle body 2, the inclined end faces of the puncture needle body 2 and the solid needle body 31 must be aligned to form an inclined end face so that the puncture needle body 2 can penetrate the human body smoothly. Figure 3 As shown, in order to align the inclined end faces of the puncture needle body 2 and the solid needle body 31, the solid needle 3 further includes a positioning protrusion 33, which is arranged on the needle seat 32. The sealing unit 4 further includes a positioning groove 45, which is arranged on the sealing seat 41. The positioning protrusion 33 can be connected with the positioning groove 45, and the user does not need to specifically adjust the solid needle body 31 at the opening of the puncture needle body 2. It only needs to connect the positioning protrusion 33 with the positioning groove 45, which can automatically align the inclined end faces of the puncture needle body 2 and the solid needle body 31, saving the puncture operation time and reducing the user's work intensity.

[0042] Preferably, Figure 1 and Figure 2 As shown, the puncture needle of this embodiment is a medical consumable and disposable. In order to measure the pressure of the liquid in the lumbar spine, the puncture needle of this embodiment also includes an adapter unit 5, which is used to connect the puncture needle of this embodiment with a non-disposable pressure gauge 100. The syringe 1 also includes a first sub-cylinder 12, which is arranged on the cylinder 11 and communicated with the cylinder 11. The adapter unit 5 is connected to the first sub-cylinder 12, and the pressure gauge 100 is used to measure the liquid pressure in the cylinder 11. The liquid pressure in the cylinder 11 is the same as the liquid pressure in the lumbar spine, and the pressure gauge 100 can display the liquid pressure in the lumbar spine.

[0043] Preferably, Figure 4 and Figure 5 As shown, the adapter 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 adapter unit 5, and 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 closing 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 the hollow portion is greater than the outer diameter of the valve core 502. The valve core 502 is arranged on the first sub-tube 12 and passes through the hollow portion of the valve core outer sleeve 501. The closing block 503 is arranged at one end of the valve core 502, and the other end of the valve core 502 is a crimping end. The closing block 503 is used to block the valve core outer sleeve 501 to prevent the 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. The valve spring 504 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 of the valve spring 504 is connected to the valve core outer sleeve 501. The valve spring 504 is used to separate the valve core 502 from the valve core outer sleeve 501, so that the closing block 503 keeps blocking the valve core outer sleeve 501 and maintains the closed state of the valve module. A liquid transmission hole is provided on the valve core 502. When the crimping end of the valve core 502 is pressed, the closing block 503 can be separated from the valve core outer sleeve 501, thereby realizing the opening of the valve module. The liquid in the cylinder 11 flows out of the syringe 1 through the hollow part of the valve core outer sleeve 501 and the liquid transmission hole of the valve core.

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

[0047] Preferably, the first sub-cylinder 12 can be inserted into the valve opening sleeve 505 to connect the pressure gauge 100 with 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 closing block 503 is separated from the valve core outer sleeve 501, thereby realizing the opening of the valve module. The liquid in the cylinder 11 is introduced into the pressure gauge 100 through the hollow part of the valve core outer sleeve 501, the liquid transmission hole of the valve core, the valve opening sleeve 505 and the liquid transmission hole of the lever. The pressure gauge 100 can measure the pressure. The connection method is convenient and fast, 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. The positioning ring groove 13 is disposed on the outer wall of the first sub-cylinder 12. A limit bead hole is provided on the valve opening sleeve 505. The limit bead hole is a through hole. The valve opening module further includes a limit bead 507. The limit bead 507 is disposed 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 sub-cylinder 12 from separating from the valve opening sleeve 505 and maintain the connection between the pressure gauge 100 and the syringe 1.

[0049] Preferably, to prevent the limit bead 507 from disengaging from the limit bead hole, the valve opening module further includes an unlocking sleeve 508 and an inner compression spring 509. The unlocking sleeve 508 is disposed between the valve opening sleeve 505 and the valve opening lever 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 limit bead hole to prevent the limit bead 507 from disengaging from the limit bead hole in the direction of the valve opening lever 506. One end of the inner compression spring 509 is connected to the valve opening lever 506, and the other end of the inner compression spring 509 is connected to the unlocking sleeve 508. The inner compression spring 509 is used to push the unlocking sleeve 508 to keep the unlocking sleeve 508 blocking the limit bead hole. The first sub-cylinder 12 can press the unlocking sleeve 508, 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.

[0050] Preferably, to prevent the limit bead 507 from disengaging from the limit bead hole in the direction away from the valve opening lever 506, the valve opening module further includes a quick-connect sleeve 510 and a quick-connect compression 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 compression spring 511 is connected to the valve opening sleeve 505, and the other end of the quick-connect compression spring 511 is connected to the quick-connect sleeve 510. The quick-connect compression spring 511 is used to push the quick-connect sleeve 510 to disengage the quick-connect sleeve 510 from the valve opening sleeve 505. A limit bead ring groove 512 is formed on the inner wall of the quick-connect sleeve 510. The diameter of the limit bead 507 is greater than the wall thickness of the valve opening sleeve 505. The limit bead ring groove 512 is used to accommodate the part of the limit bead 507 protruding from the limit bead hole. The limit bead 507 prevents the quick-connect sleeve 510 from disengaging from the valve opening sleeve 505.

[0051] When performing quick connection, the first sub-cylinder 12 is inserted into the valve opening sleeve 505, and the valve opening lever 506 pushes the valve core 502 towards the cylinder body 11, causing the closing block 503 to disengage from the valve core outer sleeve 501, thereby realizing the opening of the valve module; the first sub-cylinder 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 limit bead 507 disengages from the limit bead hole in the direction of the valve opening lever 506. The limit bead 507 is connected to the positioning ring groove 13 to prevent the first sub-cylinder 12 from disengaging from the valve opening sleeve 505; the quick-connect sleeve 510 moves towards the first sub-cylinder 12 and blocks the limit bead hole to prevent the limit bead 507 from disengaging from the positioning ring groove 13, completely locking the connection between the valve opening sleeve 505 and the first sub-cylinder 12. The liquid in the cylinder body 11 is introduced into the pressure gauge 100 through the hollow part of the valve core outer sleeve 501, the liquid transfer hole of the valve core, the valve opening sleeve 505 and the liquid transfer hole of the lever for pressure measurement.

[0052] When performing quick disassembly, the quick-connect sleeve 510 is pulled toward the direction of the pressure gauge 100, so that the limiting bead ring groove 512 is connected to the opening of the limiting bead hole, and the limiting bead 507 can move toward the limiting bead ring groove 512 and disengage from the positioning ring groove 13, thereby unlocking the connection between the valve opening sleeve 505 and the first sub-cylinder 12; the first sub-cylinder 12 is pulled out of the valve opening sleeve 505, the valve opening pressure rod 506 is disengaged from the valve core 502, and the closing block 503 blocks the outer sleeve 501 of the valve core; the unlocking sleeve 508 slides along the inner wall of the valve opening sleeve 505, and the limiting bead 507 enters the limiting bead hole in the direction away from the valve pressure rod 506, thereby completing the separation of the valve opening sleeve 505 and the first sub-cylinder 12. The quick-connect sleeve 510 only needs to be pulled toward the pressure gauge 100 to separate the valve opening sleeve 505 from the first sub-tube 12, and the closing block 503 automatically blocks the valve core outer sleeve 501. The quick-disassembly 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 also includes a first sealing ring 513 and a second sealing ring 14. The first sealing ring 513 is arranged on the end face of the unlocking sleeve 508, and the first sealing ring 513 is used to seal the unlocking sleeve 508 and the first sub-cylinder 12 to prevent liquid from leaking from the connection between the unlocking sleeve 508 and the first sub-cylinder 12; the second sealing ring 14 is arranged on the outer wall of the first sub-cylinder 12, and the second sealing ring 14 is used to seal the first sub-cylinder 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-cylinder 12.

[0054] Compared with the prior art, the connecting rod 42 of the puncture needle in this embodiment is a hollow connecting rod. The solid needle body 31 can pass through the connecting rod 42 and the sealing ring 43 and enter the syringe barrel 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 and expanding the outer diameter of the sealing ring 43, and further sealing the syringe barrel 1 to prevent the liquid in the syringe barrel 1 from flowing out of the syringe barrel 1 and preventing pressure relief of the puncture needle in this embodiment. The positioning convex block 33 can be connected to the positioning groove 45. Users do not need to specifically adjust the solid needle body 31 at the opening of the puncture needle body 2. Just connecting the convex block 33 to the positioning groove 45 can automatically align the inclined end faces of the puncture needle body 2 and the solid needle body 31 respectively, saving the puncture operation time and reducing the working intensity of users. The first sub-cylinder 12 can be inserted into the valve-opening sleeve 505 to connect the pressure gauge 100 to the syringe barrel 1. At the same time, the valve-opening pressure rod 506 can be connected to the crimping end of the valve core 502 and push the valve core 502 towards the cylinder body 11, so that the closing block 503 disengages from the valve core outer sleeve 501, thereby realizing the opening of the valve module. The liquid in the cylinder body 11 is transmitted into the pressure gauge 100 through the hollow part of the valve core outer sleeve 501, the liquid transmission hole of the valve core, the valve-opening sleeve 505 and the liquid transmission hole of the pressure rod. The pressure gauge 100 can measure pressure. The connection method is convenient and fast, and it can ensure that the syringe barrel 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 disengaging from the valve-opening sleeve 505 and maintain the connection between the pressure gauge 100 and the syringe barrel 1. The first sub-cylinder 12 can press the unlocking sleeve 508, make the limit bead 507 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. Only by pulling the quick-connect sleeve 510 towards the pressure gauge 100 can the valve-opening sleeve 505 and the first sub-cylinder 12 be separated, and the closing block 503 automatically seals the valve core outer sleeve 501. The quick-disassembly action is simple and rapid, saving the operation time of users.

[0055] Embodiment 2:

[0056] Another specific embodiment of the puncture needle of the present invention, on the basis of Embodiment 1, adds a drainage valve 6. The drainage valve 6 is used for draining from the spinal column to the outside of the body via the cylinder body 11.

[0057] Preferably, as Figure 1 and Figure 6 shown, the puncture needle in this embodiment further includes a drainage valve 6. The syringe barrel 1 further includes a second sub-cylinder 15, which is arranged on the cylinder body 11. The drainage valve 6 is arranged on the second sub-cylinder 15.

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

[0059] Preferably, in order to prevent the valve body 61 from rotating due to accidental contact with the drainage valve 6, causing the drainage valve 6 to open. The drainage valve 6 further includes a limiting member 63, the limiting member 63 is arranged 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 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 limitation of the solid needle body 31, the limiting member 63 cannot move towards the cylinder body 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 the drainage valve 6 will not open. Disconnect the solid needle body 31 from the cylinder body 11 and rotate the valve body 61. The valve body 61 can push the limiting member 63 towards the cylinder body 11, thereby connecting the second sub-cylinder 15 and opening the drainage valve 6.

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

[0061] Compared with Embodiment 1, the drainage valve 6 of this embodiment is used for draining from the spine to the outside of the body via the cylinder body 11; the limiting member 63 is arranged 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 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 limitation of the solid needle body 31, the limiting member 63 cannot move towards the cylinder body 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 the drainage valve 6 will not open.

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

Claims

1. A lumbar puncture needle, characterized in that: It comprises a syringe (1) and a puncture needle body (2), wherein the puncture needle body (2) is arranged on the syringe (1), the syringe (1) is used for drainage during puncture, and the puncture needle body (2) is used for spinal puncture.

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 2, characterized in that: It also comprises a solid needle (3), wherein the solid needle (3) is arranged on the syringe (1), and the solid needle (3) is used to block the puncture needle body (2) during lumbar puncture.

4. The lumbar puncture needle according to claim 1, characterized in that: The syringe (1) comprises a barrel (11), and the barrel (11) is a straight cylinder.

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

6. The lumbar puncture needle according to claim 3, characterized in that: The solid needle (3) comprises a solid needle body (31) and a needle seat (32).

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

8. The lumbar puncture needle according to claim 7, characterized in that: It also comprises a sealing unit (4), wherein the sealing unit (4) is arranged on the syringe (1).

9. The lumbar puncture needle according to claim 8, characterized in that: The sealing unit (4) comprises a sealing seat (41), a connecting rod (42) and a sealing ring (43), wherein the connecting rod (42) is arranged on the sealing seat (41).

10. The lumbar puncture needle according to claim 9, characterized in that: The syringe (1) comprises a sealing groove, the connecting rod (42) can be threadedly connected to the sealing groove, and the sealing ring (43) is arranged in the sealing groove.

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