Lumbar puncture needle

Abstract

The utility model relates to a lumbar puncture needle which comprises a needle tube, a needle core, a connecting piece detachably connected with the needle tube, a pressure sensor arranged in the connecting piece and an end cover connected with the connecting piece, the connecting piece is arranged at one end of the needle tube and provided with a channel communicated with an inner cavity of the needle tube, and the needle core is inserted into the needle tube through the channel. The pressure sensor is used for detecting pressure of liquid in the channel, and the end cover is used for blocking the end of the channel and further blocking the liquid. The pressure sensor is arranged in the connecting piece, meanwhile, the end cover is arranged to block the channel, automatic pressure measurement of liquid in the needle tube is achieved, the measurement precision is higher, measurement is more convenient, meanwhile, the needle tube is detachably connected with the connecting piece, after use is finished, the needle tube can be detached, the connecting piece is cleaned and disinfected and then reused, the use cost is reduced, and the practicability is high. Meanwhile, needle tubes and needle cores of different specifications can be installed on the connecting piece, and more operation requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to lumbar puncture and intraspinal injection technical field, more particularly, a lumbar puncture needle. BACKGROUND

[0002] Lumbar puncture and intrathecal injection are a common medical treatment in pediatric clinical, generally used for checking cerebrospinal fluid property composition, diagnosing brain and spinal cord inflammation / denaturation / demyelination, hemorrhagic cerebral vascular disease, intracranial tumor and other nervous system diseases, also can be used for measuring intracranial pressure, checking cerebrospinal fluid and judging whether obstruction appears in the spinal canal or not, intrathecal injection etc.Lumbar puncture is generally carried out using a lumbar puncture needle, and the traditional lumbar puncture needle has the following problems: 1, the traditional pressure measuring glass tube is connected to the liquid outlet port of the puncture needle for measuring cerebrospinal fluid pressure, which has poor airtightness, inaccurate pressure measurement, and the pressure measuring tube is easy to be detached from the puncture needle port; 2, children are not easy to cooperate during operation, and there is no fixing device after the puncture needle tube is inserted into the skin of the child, so that the body movement of the child may cause the displacement of the puncture needle, and the puncture needle tube is easy to move during intrathecal injection, which may cause injury to the patient; 3, the puncture needle has only a single outer needle tube and inner needle core structure, and there is no scale display or depth warning on the surface of the puncture needle, so that it is difficult for children to grasp the insertion depth during lumbar puncture, and the puncture is too shallow to cause the cerebrospinal fluid not to be drawn out, and the puncture is too deep to cause bleeding or cerebrospinal fluid leakage; 4, the amount of cerebrospinal fluid outflow cannot be accurately measured, resulting in excessive or insufficient cerebrospinal fluid drainage.

[0003] In the prior art, there is a lumbar puncture needle provided with a pressure sensor, which can accurately detect the pressure of cerebrospinal fluid, and does not need to use an additional pressure measuring tube, so as to solve the first problem, but the lumbar puncture needle has high manufacturing cost, and is difficult to clean and disinfect, so that it cannot be reused, and has high use cost. UTILITY MODEL CONTENTS

[0004] The utility model provides a lumbar puncture needle, which can reduce the use cost on the basis of pressure measurement, to overcome the defects of the lumbar puncture needle provided with a pressure sensor in the prior art, which cannot be reused and has high use cost.

[0005] To solve the above technical problems, the utility model adopts the technical scheme: a lumbar puncture needle, include: needle tube, needle core, with the detachable connection of needle tube connecting piece, pressure sensor that sets up in the connecting piece, with the end cover that connecting piece connects, the connecting piece sets up in one end of the needle tube and is equipped with the passage that communicates with the needle tube inner chamber, the needle core is inserted in the needle tube through the passage, the pressure sensor is used for detecting the pressure of liquid in the passage, the end cover is used for blocking the end of the passage and then blocking liquid.

[0006] The connecting piece is arranged at one end of the needle tube, and the needle core is inserted into the needle tube through the connecting piece. Specifically, the connecting piece is provided with a passage communicating with the inner chamber of the needle tube, the needle core is inserted into the passage and then into the needle tube, the pressure sensor communicates with the passage and then with the inner chamber of the needle tube, the needle tube and the needle core are inserted into the spinal canal of the patient, when the pressure of the cerebrospinal fluid of the patient needs to be measured, the needle core is pulled out, at this time, the cerebrospinal fluid flows out and enters the passage, then the end of the passage is blocked by the end cover to prevent the cerebrospinal fluid from flowing out, at this time, the pressure of the cerebrospinal fluid can be detected by the pressure sensor, and the traditional pressure measuring glass tube is replaced to measure the pressure of the cerebrospinal fluid. After the operation is completed, the removed needle tube is separated from the connecting piece, the needle tube and the needle core are not reused as disposable instruments, the connecting piece and the end cover are cleaned and disinfected according to the specifications of medical instruments, and then a new needle tube is installed, a new needle core is inserted, and the connecting piece and the end cover can be reused, the pressure sensor arranged in the connecting piece is also reused, and the use cost of the puncture needle using the pressure sensor is reduced. The length of the passage in the connecting piece is much smaller than the length of the needle tube, the needle tube is relatively easy to clean and can be cleaned, thereby meeting the demand for reuse. At the same time, if possible, the length of the passage should be shortened as much as possible, and the diameter of the passage should be increased as much as possible to facilitate cleaning. The cleaning process can refer to the cleaning process of existing medical tube instruments or other reusable puncture needles. Specifically, the end cover is inserted or clamped with the connecting piece, and there is also a connection of other structures, so that the end cover is connected with the connecting piece without being separated from the connecting piece when the passage is not sealed, which is convenient for use. Further, the surface of the connecting piece is provided with an anti-skid part for easy gripping, which can be anti-skid lines, protrusions or grooves.

[0007] Preferably, it further comprises a fastener, one side of the connecting piece is provided with a first connecting part, one end of the needle tube is provided with a second connecting part connected with the first connecting part, the fastener is connected with the first connecting part and the second connecting part at the same time, and the fastener is used to fix the second connecting part on the first connecting part.

[0008] The needle tube is fixed on the connecting piece through the fastener, the second connecting part at the end of the needle tube is connected with the first connecting part, and the fastener further fixes the second connecting part and the first connecting part together, thereby realizing fixation. The fastener is arranged to ensure the connecting effect and ensure that the needle tube can be stably fixed with the connecting piece during use. The fastening scheme of the fastener can adopt a buckle to tightly press the second connecting part on the first connecting part, or adopt a screw or nut for fixation.

[0009] Preferably, the first connecting part is in a protruding shape, the second connecting part is sleeved on the first connecting part, the fastener is sleeved on the first connecting part and the second connecting part at the same time, the fastener is threadedly connected with the first connecting part, the second connecting part is fixed between the fastener and the first connecting part, and the needle tube penetrates through the fastener.

[0010] The sleeved connecting structure can limit the needle tube in the radial direction, and can sufficiently avoid relative shaking of the needle tube and the connecting piece. The fastener is sleeved on the first connecting part and the second connecting part, and is threadedly connected with the first connecting part at the same time, so that the first connecting part is wrapped by the fastener, thereby further improving the connecting stability and reducing the risk of shaking of the needle tube during diagnosis and treatment of children. Specifically, the fastener is a ring-shaped member provided with a baffle at one end, an inner side surface is provided with a thread, the baffle is provided with a hole for the needle tube to pass through, and the second connecting part is wrapped and fixed between the baffle and the first connecting part. Further, the first connecting part is made of metal, thereby improving the strength of the first connecting part and making the needle tube more stable during use and not shaking.

[0011] Preferably, a sealing member is arranged between the first connecting part and the second connecting part and between the second connecting part and the fastener.

[0012] The sealing member is arranged to improve the connecting and sealing property between the inner cavity of the needle tube and the inner cavity of the connecting piece, avoid liquid leakage, and also help the close connection between the first connecting part and the second connecting part.

[0013] Preferably, the device further comprises a clamping member sleeved on the needle tube, the clamping member is in sliding connection with the needle tube, and an abutting surface is arranged at an end of the clamping member away from the connecting piece.

[0014] The clamping part is in sliding connection with the needle tube and is provided with an abutting surface, in use, after the needle tube successfully penetrates into the subarachnoid space, the clamping part is moved towards the patient, so that the abutting surface abuts against the patient, through the abutting effect of the abutting part, the needle tube is kept fixed, avoiding shaking of the needle tube, further ensuring more stable needle tube in the diagnosis and treatment of children, so that it can be applied to the diagnosis and treatment of children. Further, the abutting surface is an arc surface, which is more suitable for the skin of the patient and has better stability. Further, the clamping part is made of flexible and bendable material. Further, the clamping part is provided with an abutting part for conveniently holding the clamping part by the user, and the surface of the abutting part is an arc surface, which is further suitable for the fingers.

[0015] Preferably, one side of the end cover close to the connecting piece is provided with a containing cavity for containing the end part of the needle core.

[0016] The containing cavity is arranged to allow the end part of the needle core to be covered in the end cover, which is convenient for use and prevents the needle core from falling off during the penetration of the needle tube. The end part of the needle core refers to the taking part of the needle core, which is taken out by taking the taking part. The existing needle core can be referred to.

[0017] Preferably, it further comprises a rod connected with the end cover, an elastic member sleeved on the rod, and a limiting member arranged at the end of the rod, the end cover is in sliding and rotating connection with the connecting piece through the rod, the elastic member is abutted on the limiting member and the connecting piece at two ends respectively, and the limiting member is used for limiting the rod from being separated from the connecting piece.

[0018] Since the end part of the needle core has a certain thickness, the end cover needs to be pulled out first when it is opened. In order to facilitate the use of the end cover, the end cover can be rotated after being pulled out. The end cover is pulled out, i.e. slides relative to the connecting piece, and is rotated, i.e. rotates relative to the connecting piece. Both actions are realized by the rod. The rod is in sliding connection with the connecting piece and is not limited in the radial direction, so it can rotate relative to the connecting piece while sliding. When the rod slides to the limit position, the limiting member abuts against the connecting piece, so as to avoid the rod from being separated from the connecting piece. When the rod moves, the elastic member is compressed. The elastic member keeps the end cover close to the connecting piece at all times, so as to avoid unnecessary shaking.

[0019] Preferably, one side of the end cover close to the connecting piece is provided with a limiting part that can be elastically contracted, and one side of the connecting piece close to the end cover is provided with a groove matched with the limiting part. When the end cover is rotated to a set angle, the limiting part is clamped into the groove, thereby limiting the rotation of the end cover.

[0020] The limiting piece is used for limiting rotation of the end cover, and when the end cover rotates to a set angle, the limiting piece is clamped into the groove to limit rotation of the end cover, specifically, the limiting piece can be elastically contracted, that is, the limiting piece can be contracted into the connecting piece under external pressure, and can be automatically popped out without external force. Further, the connecting piece is provided with a cavity for accommodating the limiting piece, a spring and the limiting piece are arranged in the cavity, the two ends of the spring are respectively abutted against the bottom of the cavity and the limiting piece, a limiting ring is arranged at the opening of the cavity, the limiting ring is used for limiting the limiting piece from being separated from the connecting piece, and the limiting piece is partially exposed, and the exposed part of the limiting piece is clamped with the groove. Further, the limiting piece is a spherical piece.

[0021] Preferably, it further comprises a liquid outlet pipe connected with the connecting piece, a valve and a flow sensor arranged on the liquid outlet pipe respectively, and the flow sensor is used for detecting the flow of the liquid flowing out of the liquid outlet pipe.

[0022] In some cases, it is necessary to drain the cerebrospinal fluid, and the liquid outlet pipe is arranged for draining the cerebrospinal fluid, and the liquid outlet pipe is provided with a valve and a flow sensor, and the flow sensor is used for monitoring the amount of cerebrospinal fluid flowing out, so as to accurately control the amount of cerebrospinal fluid flowing out, and avoid excessive flow, and the valve is a manual valve or an electric valve.

[0023] Preferably, the surface of the needle tube is provided with a plurality of marking parts, and the plurality of marking parts are respectively used for judging the penetration depth of the needle tube.

[0024] The marking part is arranged for judging the penetration depth of the needle tube, and the marking part can adopt scales, scales and numbers, color rings or color blocks, and the like, further, a plurality of puncture depth prompt areas are divided by the marking part, wherein 0-2cm is a relatively safe puncture depth for infants, 2-4cm is a relatively safe puncture depth for children, and more than 4cm is a dangerous depth. Further, in an embodiment, a scale and number mode is adopted, the scale interval is 0.2cm, the total length of the scale area is 6.5cm, and a number mark is arranged at the end of the scale area. In an embodiment, a scale and color mode is adopted, the scale interval is 0.2cm, the total length of the scale area is 6.5cm, and a green mark is arranged in the 0-2cm interval, a yellow mark is arranged in the 2-4cm interval, and a red mark is arranged above 4cm.

[0025] Compared with the prior art, the utility model has the beneficial effects that:

[0026] The pressure sensor is arranged in the connecting piece, and the end cover is arranged to block the channel, so as to realize automatic pressure measurement of the liquid in the needle tube, the measurement accuracy is higher, and the measurement is more convenient, the needle tube and the connecting piece are arranged to be detachably connected, after use, the needle tube can be detached, the connecting piece can be cleaned and disinfected for repeated use, the use cost is reduced, and the connecting piece can be installed with different specifications of needle tubes and needle cores, so as to meet more operation requirements. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a whole structure schematic view of a lumbar puncture needle of the utility model;

[0028] Figure 2 is an internal structure schematic view of a lumbar puncture needle of the utility model;

[0029] Figure 3 is a side schematic view of one embodiment of a lumbar puncture needle of the utility model;

[0030] Figure 4 is a side schematic view of another embodiment of a lumbar puncture needle of the utility model.

[0031] In the figure: 1, needle tube; 101, second connecting part; 2, needle core; 3, connecting piece; 301, first connecting part; 302, groove; 4, pressure sensor; 5, end cover; 501, first plugging part; 502, second plugging part; 6, fastener; 7, sealing element; 8, clamping element; 801, abutting surface; 9, rod element; 10, elastic element; 11, limiting element; 12, limiting element; 13, liquid outlet pipe; 14, valve; 15, flow sensor; 16, identification part; 17, screen; 18, limiting ring. DETAILED DESCRIPTION

[0032] The accompanying drawings are only used for illustrative description, and should not be understood as a limitation to the patent; in order to better illustrate the embodiment, some components in the drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures in the drawings and their descriptions can be omitted. The positional relationship described in the drawings is only used for illustrative description, and should not be understood as a limitation to the patent.

[0033] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it should be understood that if the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "long" and "short" is based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, a specific orientation and operation, therefore, the terms describing the positional relationship in the drawings are only used for illustrative description, and should not be understood as a limitation to the patent, and for those skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0034] The technical scheme of the utility model will be further specifically described below through specific embodiments and in combination with the drawings:

[0035] Embodiment 1

[0036] As Figures 1-2 shown, a lumbar puncture needle, comprising: a needle tube 1, a needle core 2, a connecting piece 3 detachably connected with the needle tube 1, a pressure sensor 4 arranged in the connecting piece 3, and an end cap 5 connected with the connecting piece 3, the connecting piece 3 is arranged at one end of the needle tube 1 and is provided with a channel communicating with the inner cavity of the needle tube 1, the needle core 2 is inserted into the needle tube 1 through the channel, the pressure sensor 4 is used to detect the pressure of the liquid in the channel, and the end cap 5 is used to block the end of the channel to block the liquid.

[0037] The connecting piece 3 is arranged at one end of the needle tube 1, and the needle core 2 is inserted into the needle tube 1 through the connecting piece 3. Specifically, the connecting piece 3 is provided with a channel communicating with the inner cavity of the needle tube 1, the needle core 2 is inserted into the channel and then into the needle tube 1, the pressure sensor 4 communicates with the channel and then with the inner cavity of the needle tube 1, the needle tube 1 and the needle core 2 are inserted into the spinal canal of the patient, when the pressure of the cerebrospinal fluid of the patient needs to be measured, the needle core 2 is pulled out, at this time the cerebrospinal fluid flows out and enters the channel, then the end of the channel is blocked by the end cap 5 to prevent the cerebrospinal fluid from flowing out, at this time the pressure sensor 4 can detect the pressure of the cerebrospinal fluid, and then replace the traditional pressure measuring glass tube to measure the pressure of the cerebrospinal fluid, after the operation is completed, the removed needle tube 1 is separated from the connecting piece 3, the needle tube 1 and the needle core 2 are not reused as disposable instruments, the connecting piece 3 and the end cap 5 are cleaned and sterilized according to the specifications of medical instruments, and then a new needle tube 1 is installed, a new needle core 2 is inserted, and the connecting piece 3 and the end cap 5 can be reused, the pressure sensor 4 arranged in the connecting piece 3 is also reused, thereby reducing the use cost of the pressure sensor 4 when the puncture needle is used. The length of the channel in the connecting piece 3 is much smaller than the length of the needle tube 1, which is easier to clean than the needle tube 1 and can be cleaned, thereby meeting the demand for reuse, and in the case of feasibility, the length of the channel should be shortened as much as possible and the diameter of the channel should be increased as much as possible to further facilitate cleaning, and the cleaning process can refer to the cleaning process of existing medical tube cavity instruments or other reusable puncture needles. Specifically, the end cap 5 is inserted or clamped with the connecting piece 3, and there is also a connection of other structures, so that the end cap 5 is connected with the connecting piece 3 without being separated from the connecting piece 3 when the channel is not sealed, which is convenient for use. Further, the surface of the connecting piece 3 is provided with an anti-skid part for easy grabbing, which can be anti-skid lines or protrusions or grooves 302.

[0038] Further, as Figure 2 shown, the end of the channel of the connecting piece 3 can be connected with an external syringe, and further, the end of the channel is provided with a guide surface to facilitate the alignment of the needle core 2 and the external syringe, and also facilitate the intraspinal injection of related drugs.

[0039] The beneficial effects of the embodiment are that the pressure sensor 4 is arranged in the connecting piece 3, and the end cover 5 is arranged to block the channel, thereby realizing automatic pressure measurement of the liquid in the needle tube 1, the measurement accuracy is higher, and the measurement is more convenient. The needle tube 1 is detachably connected with the connecting piece 3, after use, the needle tube 1 can be detached, the connecting piece 3 can be cleaned and disinfected for repeated use, the use cost is reduced, the connecting piece 3 can be installed with needle tubes 1 and needle cores 2 of different specifications, and more surgical requirements can be met.

[0040] Embodiment 2

[0041] As shown in Figures 1-2 the embodiment 1, the difference between the embodiment 1 and the embodiment 2 is that:

[0042] The fastener 6 is further included, one side of the connecting piece 3 is provided with the first connecting part 301, one end of the needle tube 1 is provided with the second connecting part 101 connected with the first connecting part 301, and the fastener 6 is connected with the first connecting part 301 and the second connecting part 101 at the same time. The fastener 6 is used for fixing the second connecting part 101 on the first connecting part 301. The first connecting part 301 is in a convex shape, the second connecting part 101 is sleeved on the first connecting part 301, and the fastener 6 is sleeved on the first connecting part 301 and the second connecting part 101 at the same time. The fastener 6 is screwed with the first connecting part 301, the second connecting part 101 is fixed between the fastener 6 and the first connecting part 301, and the needle tube 1 penetrates through the fastener 6. The first connecting part 301 and the second connecting part 101, and the second connecting part 101 and the fastener 6 are respectively provided with the sealing piece 7. The clamping part 8 sleeved on the needle tube 1 is further included, the clamping part 8 is slidably connected with the needle tube 1, and one end of the clamping part 8 away from the connecting piece 3 is provided with the abutting face 801.

[0043] The needle tube 1 is fixed on the connecting piece 3 through the fastener 6, the second connecting part 101 at the end of the needle tube 1 is connected with the first connecting part 301, and the fastener 6 further fixes the second connecting part 101 and the first connecting part 301 together to realize fixation. The fastener 6 is arranged to ensure the connecting effect and ensure that the needle tube 1 can be stably fixed with the connecting piece 3 during use. The fastening scheme of the fastener 6 can adopt a buckle to tightly press the second connecting part 101 on the first connecting part 301, or adopt a screw or nut fixation, etc. The sleeved connecting structure can limit the needle tube 1 in the radial direction, and fully avoid the relative shaking of the needle tube 1 and the connecting piece 3. The fastener 6 is sleeved on the first connecting part 301 and the second connecting part 101, and is further threadedly connected with the first connecting part 301, so that the first connecting part 301 is wrapped by the fastener 6, and the connection stability is further improved, and the risk of shaking of the needle tube 1 during the diagnosis and treatment of children is reduced. Specifically, the fastener 6 is a ring-shaped piece provided with a baffle at one end, and the inner side is provided with a thread. The baffle is provided with a hole for the needle tube 1 to pass through, and the second connecting part 101 is wrapped and fixed between the baffle and the first connecting part 301. Further, the first connecting part 301 is made of metal material, thereby improving the strength of the first connecting part 301, and making the needle tube 1 more stable during use and not shaking. The sealing element 7 is arranged to improve the connection and sealing property between the inner cavity of the needle tube 1 and the inner cavity of the connecting piece 3, avoid liquid leakage, and also help the close connection between the first connecting part 301 and the second connecting part 101. The clamping element 8 is slidably connected with the needle tube 1 and is provided with an abutting surface 801. During use, after the needle tube 1 successfully penetrates into the subarachnoid space, the clamping element 8 is moved towards the patient, so that the abutting surface 801 abuts against the patient's body. Through the abutting effect of the abutting element, the needle tube 1 is kept fixed, the shaking of the needle tube 1 is avoided, and the needle tube 1 is more stable during the diagnosis and treatment of children, so that it can be applied to the diagnosis and treatment of children. Further, the abutting surface 801 is an arc surface, which is more suitable for the skin of the patient and has better stability. Further, the clamping element 8 is made of flexible and bendable material. Further, the clamping element 8 is provided with an abutting part for conveniently holding the clamping element 8 by the user, and the surface of the abutting part is arc-shaped, thereby being suitable for the fingers.

[0044] As Figure 2 Further, the first connecting part 301 is provided with a limiting structure for limiting the rotation of the second connecting part 101. In the embodiment, the limiting structure is a protrusion connected with the first connecting part 301, and the second connecting part 101 is provided with a through hole opposite to the protrusion.

[0045] The remaining features and working principles of the embodiment are consistent with those of the embodiment 1.

[0046] Embodiment 3

[0047] As Figures 1-4Further limited on the basis of embodiment 1 or embodiment 2, the difference lies in that:

[0048] The side of the end cover 5 close to the connecting piece 3 is provided with a containing cavity for containing the end of the needle core 2. It also comprises a rod piece 9 connected with the end cover 5, an elastic piece 10 sleeved on the rod piece 9, and a limiting piece 11 arranged at the end of the rod piece 9. The end cover 5 is slidingly and rotatably connected with the connecting piece 3 through the rod piece 9. The two ends of the elastic piece 10 are respectively abutted against the limiting piece 11 and the connecting piece 3. The limiting piece 11 is used for limiting the rod piece 9 from being separated from the connecting piece 3. The side of the end cover 5 close to the connecting piece 3 is provided with a limit piece 12 which can be elastically contracted. The side of the connecting piece 3 close to the end cover 5 is provided with a groove 302 matched with the limit piece 12. When the end cover 5 is rotated to a set angle, the limit piece 12 is clamped into the groove 302, thereby limiting the rotation of the end cover 5. It also comprises a liquid outlet pipe 13 connected with the connecting piece 3, a valve 14 and a flow sensor 15 arranged on the liquid outlet pipe 13 respectively. The flow sensor 15 is used for detecting the flow of the liquid flowing out of the liquid outlet pipe 13. The surface of the needle tube 1 is provided with a plurality of marking parts 16. The plurality of marking parts 16 are respectively used for judging the penetration depth of the needle tube 1.

[0049] The end of the needle core 2 can be covered in the end cap 5, which is convenient to use and prevents the needle core 2 from falling off during the insertion of the needle tube 1. The end of the needle core 2 refers to the holding part of the needle core 2. The needle core 2 can be pulled out by holding the holding part. The existing needle core 2 can be referred to. Since the end of the needle core 2 has a certain thickness, the end cap 5 needs to be pulled out first when it is opened. To facilitate the use of the end cap 5, the end cap 5 can be rotated after being pulled out. The end cap 5 is pulled out by sliding relative to the connecting piece 3, and is rotated by rotating relative to the connecting piece 3. Both actions are realized by the rod piece 9. The rod piece 9 is connected to the connecting piece 3 by sliding and is not limited in the radial direction. It can rotate relative to the connecting piece 3 while sliding. When the rod piece 9 slides to the limit position, the limiting piece 11 abuts against the connecting piece 3 to prevent the rod piece 9 from being separated from the connecting piece 3. When the rod piece 9 moves, the elastic piece 10 is compressed. The elastic piece 10 keeps the end cap 5 close to the connecting piece 3 to avoid unnecessary shaking. The limiting piece 12 is used to limit the rotation of the end cap 5. When the end cap 5 rotates to a set angle, the limiting piece 12 is clamped into the groove 302 to limit the rotation of the end cap 5. Specifically, the limiting piece 12 can be elastically contracted, that is, the limiting piece 12 can be contracted into the connecting piece 3 under external force and can be automatically popped out without external force. Further, the connecting piece 3 is provided with a cavity for accommodating the limiting piece 12. A spring and the limiting piece 12 are arranged in the cavity. The ends of the spring abut against the bottom of the cavity and the limiting piece, respectively. The opening of the cavity is provided with a limiting ring 18. The limiting ring 18 is used to limit the separation of the limiting piece 12 from the connecting piece 3 and to make part of the limiting piece 12 exposed. The exposed part of the limiting piece 12 is clamped with the groove 302. Further, the limiting piece 12 is a spherical piece. In some cases, the cerebrospinal fluid needs to be drained. The outlet tube 13 is provided for draining the cerebrospinal fluid. The outlet tube 13 is provided with a valve 14 and a flow sensor 15. The flow sensor 15 is used to monitor the amount of cerebrospinal fluid flowing out, so as to accurately control the amount of cerebrospinal fluid flowing out and avoid excessive flow. The valve 14 is a manual valve 14 or an electric valve 14. The identification part 16 is provided for judging the insertion depth of the needle tube 1. The identification part 16 can adopt scales, scales and numbers, color rings or color blocks, etc. Further, the identification part 16 divides multiple puncture depth prompt areas. Among them, 0-2cm is the relatively safe puncture depth for infants, 2-4cm is the relatively safe puncture depth for children, and more than 4cm is the dangerous depth. Further, in one embodiment, the scale and number method is adopted. The scale interval is 0.2cm, and the total length of the scale area is 6.5cm. The numbers are marked at the whole centimeter numbers and the end of the scale. In one embodiment, the scale is matched with the color. The scale interval is 0.2cm, and the total length of the scale area is 6.5cm. The green mark is set in the 0-2cm interval, the yellow mark is set in the 2-4cm interval, and the red mark is set above 4cm.

[0050] As Figure 3As shown in the drawings, in the embodiment, further, the end cover 5 is provided with a first sealing part 501 and a second sealing part 502, the accommodating cavity is arranged in the first sealing part 501, and the accommodating cavity is used for sealing when the needle core 2 is inserted; the second sealing part 502 is used for sealing when the needle core 2 is pulled out.

[0051] As shown in the drawings, Figures 1-4 As shown in the drawings, in the embodiment, the connecting piece 3 is further provided with a screen 17 connected with the pressure sensor 4, and the screen 17 is arranged in an inclined manner, so that the pressure value can be conveniently observed.

[0052] As shown in the drawings, Figures 3-4 As shown in the drawings, in the embodiment, the position of the liquid outlet pipe 13 and the end cover 5 can be exchanged, when the screen 17 is upward, the liquid outlet pipe 13 or the end cover 5 can be arranged below the screen 17, and the liquid outlet pipe 13 is arranged below the screen 17, so that the liquid can be conveniently discharged. The valve 14 is arranged in a lateral direction.

[0053] The remaining working principle and working process of the embodiment are consistent with those of the embodiment 1 or the embodiment 2.

[0054] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or changes can be made. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement, etc. made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A lumbar puncture needle, characterized in that The utility model relates to a needle tube (1), needle core (2), with the detachable connection of needle tube (1) connecting piece (3), be provided in connecting piece (3) pressure sensor (4), with connecting piece (3) connection end cover (5), connecting piece (3) is arranged in one end of needle tube (1) and is equipped with with the communicating passage of needle tube (1) inner chamber, needle core (2) is inserted in needle tube (1) through the passage, pressure sensor (4) is used for detecting the pressure of liquid in the passage, end cover (5) is used for plugging the end of passage in turn and plugging liquid. Also including fastener (6), one side of connecting piece (3) is equipped with first connecting part (301), one end of needle tube (1) is equipped with with the second connecting part (101) of first connecting part (301) connection, fastener (6) is connected with first connecting part (301) and second connecting part (101) simultaneously, fastener (6) is used for fixing second connecting part (101) on first connecting part (301).

2. The lumbar puncture needle of claim 1, wherein: First connecting part (301) is convex, second connecting part (101) is set on first connecting part (301), fastener (6) is set on first connecting part (301) and second connecting part (101) simultaneously, fastener (6) is screwed with first connecting part (301), second connecting part (101) is fixed between fastener (6) and first connecting part (301), needle tube (1) penetrates fastener (6).

3. The lumbar puncture needle of claim 2, wherein: First connecting part (301) and second connecting part (101) between, second connecting part (101) and fastener (6) between are equipped with sealing element (7) respectively.

4. The lumbar puncture needle of claim 3, wherein: Also including the clamping element (8) of setting on needle tube (1), clamping element (8) is connected with needle tube (1) sliding, the end away from connecting piece (3) of clamping element (8) is equipped with abutting face (801).

5. The lumbar puncture needle of claim 1, wherein: The side of end cover (5) close to connecting piece (3) is equipped with the containing cavity for containing the end of needle core (2).

6. The lumbar puncture needle of claim 1, wherein: Also including the rod element (9) of connecting with end cover (5), the elastic element (10) of setting on rod element (9), the limiting element (11) of setting in rod element (9) end, end cover (5) is connected with connecting piece (3) sliding and rotation through rod element (9), the both ends of elastic element (10) are respectively abutted on limiting element (11) and connecting piece (3), limiting element (11) is used for limiting rod element (9) and separating connecting piece (3).

7. The lumbar puncture needle of claim 6, wherein: The side of end cover (5) close to connecting piece (3) is equipped with the elastic contractible limiting element (12), the side of connecting piece (3) close to end cover (5) is equipped with with the recess (302) of limiting element (12) cooperation, when end cover (5) rotates to the set angle, limiting element (12) is clamped into recess (302) in turn and restricts end cover (5) rotation.

8. The lumbar puncture needle of claim 6, wherein: ​ 9. The lumbar puncture needle of any one of claims 1-8, wherein: The liquid outlet pipe (13) is connected with the connecting piece (3), and the valve (14) and the flow sensor (15) are arranged on the liquid outlet pipe (13) respectively.

10. The lumbar puncture needle according to any one of claims 1-8, wherein: The surface of the needle tube (1) is provided with a plurality of identification parts (16), and the plurality of identification parts (16) are respectively used for judging the penetration depth of the needle tube (1).

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