Sampling device for neurology examination

Abstract

The invention relates to the technical field of medical instruments, in particular to a sampling device for neurology examination, which comprises a connecting piece, the connecting piece is provided with a connecting channel, the connecting channel is cross-shaped, and four outlets of the connecting piece are respectively provided with a puncture needle, a blocking needle, a pressure measuring tube and a sampling container. The puncture needle, the pressure measuring tube and the sampling container are all communicated with the connecting channel; the blocking needle is inserted into the puncture needle; the pressure measuring tube is positioned above the sampling container; a control valve is arranged at the communication part of the sampling container and the connecting channel. During use, firstly, the puncture needle is punctured into the lumbar vertebra of a patient, then the blocking needle is pulled out, cerebrospinal fluid flows into the pressure measuring tube through the puncture needle and the connecting channel, at the moment, the height of the cerebrospinal fluid in the pressure measuring tube can be observed, and the pressure of the cerebrospinal fluid is determined; after pressure measurement is completed, the sampling container is controlled by the control valve to be communicated with the connecting channel, so that cerebrospinal fluid in the body of the patient and the pressure measuring tube can flow into the sampling container, operation is simple, and the cerebrospinal fluid is prevented from being spilled out.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a sampling device for neurological examination. Background Art

[0002] Analysis of cerebrospinal fluid (CSF) plays a crucial role in the diagnosis of neurological diseases. CSF is a clear, colorless fluid that surrounds the brain and spinal cord. It is produced by the choroid plexus and circulates through the ventricular system and subarachnoid space before ultimately returning to the venous system. Its primary functions include buffering, providing nutrition, removing metabolic waste, and maintaining intracranial pressure. Measuring, sampling, and testing CSF pressure provide key insights for the diagnosis and treatment of neurological diseases.

[0003] Lumbar puncture is an important method for obtaining cerebrospinal fluid samples. During the use of lumbar puncture, relevant equipment is required. In the related technology, Chinese patent CN203619635U discloses a cerebrospinal fluid puncture needle for neurology, which includes a tube body, a needle tube, a needle core and a pressure measuring tube, wherein the pressure measuring tube and the tube body are connected. During use, the needle tube is first inserted into the patient's lumbar spine, and then the needle core is withdrawn. The cerebrospinal fluid then flows into the tube body and the pressure measuring tube through the needle tube. At this time, the cerebrospinal fluid pressure can be determined by observing the height of the cerebrospinal fluid in the pressure measuring tube. After the pressure measurement is completed, the needle core is inserted back into the needle tube, and then the pressure measuring tube is removed, and the sampling container and the tube body are connected to facilitate sampling of cerebrospinal fluid.

[0004] However, there are some problems with the actual use of the above-mentioned cerebrospinal fluid puncture needle for neurology: after the cerebrospinal fluid pressure measurement is completed, the cerebrospinal fluid in the pressure measuring tube will generally be discarded directly, resulting in excessive sampling when the cerebrospinal fluid needs to be sampled next time due to insufficient cerebrospinal fluid reserves in the patient's body. In order to maintain the patient's intracranial fluid balance, it is often necessary to inject normal saline into the patient's body, which is troublesome to operate; in addition, in the process of replacing the pressure measuring tube and the sampling container, the cerebrospinal fluid in the patient's body is very easy to spill, which not only easily causes sample loss, but also pollutes the operating environment, thereby increasing the risk of medical infection. Summary of the Invention

[0005] Based on this, it is necessary to provide a sampling device for neurological examination to address the problem of troublesome operation in the current cerebrospinal fluid sampling process.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A sampling device for neurological examination, the sampling device for neurological examination comprising a connecting piece; the connecting piece has a connecting channel arranged therethrough, the connecting channel is cross-shaped and has a horizontal section and a vertical section; the two outlets of the horizontal section are respectively provided with a puncture needle and a blocking needle, the puncture needle is connected to the connecting channel, and when in use, penetrates into the patient's lumbar spine, and is configured to introduce cerebrospinal fluid into the connecting channel; the blocking needle is inserted into the puncture needle and is configured to open or close the connection between the puncture needle and the connecting channel; the two outlets of the vertical section are respectively connected with a pressure measuring tube and a sampling container, the pressure measuring tube is located above the sampling container; a control valve is provided at the connection between the sampling container and the connecting channel, and the control valve is configured to open or close the connection between the sampling container and the connecting channel.

[0008] Furthermore, a flow regulating member is inserted in the horizontal section, and the flow regulating member can slide elastically along the extension direction of the horizontal section, and has corresponding first and second positions before and after sliding. When in the first position, the flow regulating member is set away from the puncture needle, and when in the second position, the flow regulating member is located at the intersection of the horizontal section and the vertical section; the sampling device for neurological examination also includes a position adjustment component, and the position adjustment component is configured to be able to adjust the position of the flow regulating member.

[0009] Furthermore, the positioning assembly includes a snap-on shell and a sliding pin, the snap-on shell is arranged on the connecting piece, and is located at the intersection of the horizontal section and the vertical section, and is connected to the connecting channel; the sliding pin is inserted in the flow regulating piece, and is sleeved on the blocking needle, and can slide in a direction perpendicular to the extension direction of the horizontal section; the sliding pin has a wedge-shaped portion, and the wedge-shaped portion can form a stop fit with the connecting piece, and can be inserted into the snap-on shell, and can form a guiding fit with the snap-on shell; a wedge groove is provided in the sliding pin, and the wedge groove can form a guiding fit with the blocking needle.

[0010] Furthermore, elastic members are connected between the flow regulating member and both ends of the horizontal section.

[0011] Furthermore, the elastic member is a spring.

[0012] Furthermore, a plug is inserted into the end of the horizontal section away from one end of the puncture needle, and the plug and the connecting piece are detachably connected; one end of the spring arranged away from the puncture needle is arranged on the plug.

[0013] Furthermore, the plug and the connecting piece form a threaded fit.

[0014] Furthermore, the control valve includes a valve core and a sealing member, wherein the valve core is threadedly inserted into the connecting member; the sealing member is located in the connecting channel and can form a sealing fit with the valve core.

[0015] Furthermore, an air outlet is provided at the connection point between the sampling container and the connecting channel. The air outlet is located below the control valve and is connected to the external environment.

[0016] Furthermore, the sampling container is a sampling bottle.

[0017] The beneficial effects of the present invention are:

[0018] During use, the sampling device for neurological examination provided by the present invention is first inserted into the patient's lumbar spine with a puncture needle, and then the blocking needle is pulled out. The cerebrospinal fluid then flows into the pressure measuring tube through the puncture needle and the connecting channel. At this time, the cerebrospinal fluid pressure in the patient's body can be determined by observing the height of the cerebrospinal fluid in the pressure measuring tube; after the pressure measurement is completed, the sampling container and the connecting channel are controlled to be connected by a control valve, so that the cerebrospinal fluid in the patient's body and the pressure measuring tube can both flow into the sampling container, thereby avoiding the risk of cerebrospinal fluid spillage caused by replacement of components in traditional devices, not only preventing sample loss, but also reducing the probability of contamination of the operating environment; at the same time, the residual cerebrospinal fluid in the pressure measuring tube can be reasonably utilized to reduce the additional extraction amount of cerebrospinal fluid in the patient's body, while helping to maintain the patient's intracranial fluid balance, without the need for subsequent replenishment of physiological saline, simplifying the operating process, and improving the safety and convenience of clinical examinations.

[0019] Furthermore, by providing a flow regulating member, the discharge flow of cerebrospinal fluid in the patient's body can be regulated during the discharge process, thereby avoiding discomfort to the patient caused by excessive flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a sampling device for neurological examination provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the exploded parts of a sampling device for neurological examination provided by an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the three-dimensional structure of a sampling device for neurological examination without the puncture needle, blocking needle, pressure measuring tube and sampling bottle provided by an embodiment of the present invention;

[0023] Figure 4 A schematic front view of the structure of the sampling device for neurological examination without the puncture needle, blocking needle, pressure measuring tube and sampling bottle provided by an embodiment of the present invention, with the flow regulating member in the first position;

[0024] Figure 5for Figure 4 Middle AA section view;

[0025] Figure 6 for Figure 4 Middle BB section view;

[0026] Figure 7 A schematic side view of the structure of the sampling device for neurological examination without the puncture needle, blocking needle, pressure measuring tube and sampling bottle provided by an embodiment of the present invention, with the flow regulating member in the first position;

[0027] Figure 8 for Figure 7 Mid-CC section view;

[0028] Figure 9 A schematic front view of the structure of the sampling device for neurological examination provided by an embodiment of the present invention, wherein the flow regulating member is in the second position and the puncture needle, pressure measuring tube and sampling bottle are removed;

[0029] Figure 10 for Figure 9 Middle DD section view;

[0030] Figure 11 for Figure 9 Middle EE section view;

[0031] Figure 12 for Figure 11 A schematic diagram of the partially enlarged structure at F in the middle;

[0032] Figure 13 A schematic side view of the structure of the sampling device for neurological examination without the puncture needle, pressure measuring tube and sampling bottle provided by an embodiment of the present invention, with the flow regulating member in the second position;

[0033] Figure 14 for Figure 13 Mid-GG section view;

[0034] Figure 15 A schematic diagram of the three-dimensional structure of a sliding pin of a sampling device for neurological examination provided by an embodiment of the present invention.

[0035] in:

[0036] 1. Connecting piece; 101. Connecting channel; 102. Air outlet; 103. Positioning tube;

[0037] 2. Puncture needle;

[0038] 3. Blocking needle;

[0039] 4. Pressure measuring tube;

[0040] 5. Sampling bottle; 501. Bottle cap;

[0041] 6. Control valve; 601. Valve core; 602. Seal;

[0042] 7. Flow regulating member; 701. First through hole; 702. Mounting tube;

[0043] 8. Positioning assembly; 801. Snap-on housing; 802. Sliding pin; 8021. Wedge-shaped portion; 8022. Second through hole; 803. Wedge groove;

[0044] 9. Spring;

[0045] 10. Plug. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0048] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0049] like Figures 1 to 15As shown, the sampling device for neurological examination provided by one embodiment of the present invention is used for measuring the pressure and sampling the cerebrospinal fluid in the patient's body, and is configured to include a connector 1; the connector 1 has a connecting channel 101 set through it, the connecting channel 101 is cross-shaped, and has a horizontal section and a vertical section; the two outlets of the horizontal section are respectively provided with a puncture needle 2 and a blocking needle 3, the puncture needle 2 is connected to the connecting channel 101, and when in use, it is inserted into the patient's lumbar spine and is configured to be able to introduce cerebrospinal fluid into the connecting channel 101; the blocking needle 3 is inserted into the puncture needle 2 and is configured to be able to open or close the connection between the puncture needle 2 and the connecting channel 101; the two outlets of the vertical section are respectively connected with a pressure measuring tube 4 and a sampling container, and the pressure measuring tube 4 is located above the sampling container; a control valve 6 is provided at the connection between the sampling container and the connecting channel 101, and the control valve 6 is configured to be able to open or close the connection between the sampling container and the connecting channel 101.

[0050] Specifically in this embodiment, the connector 1 is a cross-shaped tubular structure and has a horizontal branch and a vertical branch. The connecting channel 101 is formed in the tube of the connector 1, wherein the horizontal section is formed in the horizontal branch and the vertical section is formed in the vertical branch. The puncture needle 2 is a T-shaped stepped structure and has a smaller diameter insertion end and a larger diameter mounting end. When installed, the puncture needle 2 is sleeved on the rear tube opening of the horizontal branch of the connector 1 through the mounting end. When in use, the puncture needle 2 is inserted into the patient's lumbar spine through the insertion end, ensuring that the cerebrospinal fluid in the patient's body can be introduced into the connecting channel 101. The blocking needle 3 is a T-shaped stepped shaft structure and has a large end and a small end. When installed, the large end of the blocking needle 3 is stopped at the front tube opening of the horizontal branch of the connector 1, and the small end passes through the horizontal branch and is sealed and inserted into the puncture needle 2, ensuring that the connection between the puncture needle 2 and the connecting channel 101 can be opened or closed. Optionally, in order to improve the convenience of operating the blocking needle 3, a plurality of anti-slip protrusions are provided on the circumferential side wall of the large end of the blocking needle 3.

[0051] During installation, the pressure gauge tube 4 is positioned vertically, with its bottom end inserted into the upper opening of the vertical branch of the connector 1, and its top end suspended in the air. To facilitate determination of the cerebrospinal fluid pressure in the patient, the outer wall of the pressure gauge tube 4 may optionally be provided with a length scale extending parallel to the axis of the pressure gauge tube 4, with the length scale increasing in value from bottom to top. Alternatively, the outer wall of the pressure gauge tube 4 may be provided with markings indicating low-pressure, normal, and high-pressure areas, with the markings arranged sequentially from bottom to top along a direction parallel to the axis of the pressure gauge tube 4.

[0052] The sampling container can be set as a sampling bottle 5. The sampling bottle 5 is set vertically when installed, with the bottle mouth facing upward, and is sleeved on the lower pipe mouth of the vertical branch pipe of the connecting piece 1. Optionally, in order to ensure that the cerebrospinal fluid after sampling is not disturbed by the outside world and to ensure the accuracy of the test results, a bottle cap 501 is set on the top peripheral wall of the sampling bottle 5. After the sampling of the sampling bottle 5 is completed, the bottle cap 501 can be sealed at the bottle mouth of the sampling bottle 5 to ensure that the cerebrospinal fluid inside the sampling bottle 5 can be separated from the external environment. Optionally, in order to facilitate the determination of the sampling volume of the cerebrospinal fluid in the sampling bottle 5, a volume scale is set on the peripheral wall of the sampling bottle 5. The volume scale extends in a direction parallel to the axial direction of the sampling bottle 5, and the volume scale reading increases gradually from bottom to top.

[0053] Before use, first connect the puncture needle 2 to the rear pipe opening of the horizontal branch pipe of the connecting piece 1 through the installation end, and then insert the small end of the blocking needle 3 into the horizontal branch pipe and the puncture needle 2 from the front to the back from the front pipe opening of the horizontal branch pipe of the connecting piece 1.

[0054] During use, the patient's lumbar spine is first disinfected, and then the insertion end of the puncture needle 2 is inserted into the patient's lumbar spine; then the pressure measuring tube 4 and the sampling bottle 5 are respectively connected to the connecting piece 1, so as to avoid connecting the pressure measuring tube 4 and the sampling bottle 5 to the connecting piece 1 at the beginning, which causes the overall size of the sampling device for neurological examination to be too large, causing inconvenience in operation; then, the blocking needle 3 is pulled out from the puncture needle 2, and the small end of its T-shaped structure is separated from the inside of the puncture needle 2, so that the originally closed passage between the puncture needle 2 and the connecting channel 101 is opened. Driven by the cerebrospinal fluid's own pressure, the cerebrospinal fluid flows into the pressure measuring tube 4 through the puncture needle 2 and the connecting channel 101 in turn. By reading the length scale or area mark on the pressure measuring tube 4, the patient's cerebrospinal fluid pressure value or the pressure corresponding area can be determined intuitively and accurately.

[0055] After pressure measurement is complete, no components need to be disassembled; simply operate control valve 6 to connect sampling bottle 5 to connecting channel 101. At this point, under the influence of gravity and pressure differential, the patient's cerebrospinal fluid and any remaining cerebrospinal fluid in pressure gauge tube 4 will simultaneously flow into sampling bottle 5. By observing the volume scale on sampling bottle 5, when the cerebrospinal fluid in sampling bottle 5 reaches a preset volume, control valve 6 is operated to disconnect sampling bottle 5 from connecting channel 101. A new sampling bottle 5 is then replaced, and the old sampling bottle 5 is effectively isolated from the outside world by tightening its cap 501, ensuring the integrity and accuracy of the test sample.

[0056] During the above-mentioned process of replacing the sampling bottle 5, since the cerebrospinal fluid is still flowing into the connector 1 and the pressure measuring tube 4, on the one hand, the sampling time can be reduced and the sampling efficiency can be improved, and on the other hand, the discomfort of the patient caused by the constant change of the cerebrospinal fluid flow can be avoided.

[0057] Compared with the traditional device that requires replacing the pressure measuring tube 4 and the sampling container, this sampling device avoids the risk of cerebrospinal fluid spilling due to component replacement, thereby effectively preventing sample loss and operating environment pollution, and reducing the risk of medical infection; at the same time, it makes full use of the residual cerebrospinal fluid in the pressure measuring tube 4, reduces the additional amount of cerebrospinal fluid extracted from the patient's body, helps maintain the dynamic balance of the patient's intracranial fluid, avoids the tedious operation of subsequent supplementation of saline solution, and greatly improves the safety and convenience of clinical testing.

[0058] In a further embodiment, when measuring a patient's cerebrospinal fluid pressure, due to the pressure difference between the patient's cerebrospinal fluid pressure and atmospheric pressure, if the difference is too large, the cerebrospinal fluid will flow into the pressure gauge tube 4 at a relatively high rate. This may not only lead to inaccurate measurement data, but also disrupt the patient's intracranial pressure balance due to excessive cerebrospinal fluid flow, thereby endangering the patient's life. To avoid this, medical personnel need to manually and continuously press the nozzle of the pressure gauge tube 4, applying external force to adjust the opening degree of the nozzle to control the outflow rate of the cerebrospinal fluid, so that the cerebrospinal fluid pressure measurement can be performed in a relatively safe and stable state.

[0059] Although this method of manually and continuously pressing the orifice of the pressure measuring tube 4 can control the outflow rate of cerebrospinal fluid, it also has certain limitations: first, the operating force and pressing habits of different medical staff are different, which makes it difficult to maintain the same degree of pressing each time, making the cerebrospinal fluid outflow rate unstable, thereby affecting the accuracy and repeatability of pressure measurement; second, long-term manual pressing can easily make medical staff tired, and hand shaking and changes in force will further interfere with the stable outflow of cerebrospinal fluid and increase measurement errors; third, during manual operation, medical staff cannot concentrate all their attention on observing and recording pressure measurement data, and there is a risk of missing critical measurement opportunities or misinterpreting data due to distraction; in addition, the manual pressing method lacks precise quantitative control, and it is difficult to achieve accurate flow regulation according to the actual cerebrospinal fluid pressure conditions of different patients. When facing complex conditions or emergency situations, the disadvantages of this operation method are more obvious.

[0060] In order to effectively address the above-mentioned problems, a flow regulating member 7 is installed in the horizontal section. The flow regulating member 7 can slide elastically along the extension direction of the horizontal section, and has corresponding first and second positions before and after sliding. When in the first position, the flow regulating member 7 is set away from the puncture needle 2. When in the second position, the flow regulating member 7 is located at the intersection of the horizontal section and the vertical section; the sampling device for neurological examination also includes a position adjustment component 8, which is configured to be able to adjust the position of the flow regulating member 7.

[0061] Specifically in this embodiment, the flow regulating member 7 is a columnar structure and is coaxially inserted into the horizontal branch of the connector 1 during installation. To facilitate the connection with the blocking needle 3, a first through-hole 701 is coaxially and penetrates the end face of the flow regulating member 7. The flow regulating member 7 is connected to the blocking needle 3 through the first through-hole 701 during installation. To facilitate the elastic sliding of the flow regulating member 7, elastic members are connected between the flow regulating member 7 and both ends of the horizontal section. Specifically, the elastic member is a spring 9, which is inserted into the horizontal branch of the connector 1 during installation. Two springs 9 are located at the front and rear ends of the flow regulating member 7, respectively.

[0062] In a further embodiment, the positioning assembly 8 is configured to include a snap-on shell 801 and a sliding pin 802, the snap-on shell 801 is arranged on the connecting member 1, and is located at the intersection of the horizontal section and the vertical section, and is connected to the connecting channel 101; the sliding pin 802 is inserted into the flow regulating member 7, and is sleeved on the blocking needle 3, and can slide in a direction perpendicular to the extension direction of the horizontal section; the sliding pin 802 has a wedge-shaped portion 8021, and the wedge-shaped portion 8021 can form a stop fit with the connecting member 1, and can also be inserted into the snap-on shell 801, and can form a guiding fit with the snap-on shell 801; a wedge groove 803 is opened in the sliding pin 802, and the wedge groove 803 can form a guiding fit with the blocking needle 3.

[0063] Specifically in this embodiment, the snap-on housing 801 is a box-like structure with one end face open. The snap-on housing 801 and the connector 1 are integrally formed and positioned on the left sidewall of the connector 1. The open end of the snap-on housing 801 faces the intersection of the horizontal and vertical sections and communicates with the connecting channel 101. The sliding pin 802 is a strip-shaped structure that extends horizontally and can slide horizontally in the left-right direction during installation. To facilitate engagement with the blocking pin 3, a second through-hole 8022 is formed through the front sidewall of the sliding pin 802. The sliding pin 802 is engaged with the blocking pin 3 through the second through-hole 8022 during installation.

[0064] The wedge portion 8021 is located at the left end of the sliding pin 802. The wedge portion 8021 has two wedge-shaped surfaces, one located on the front and rear sidewalls of the sliding pin 802. The two wedge-shaped surfaces form an eight-shaped structure, with the larger opening facing right. A wedge groove 803 is provided on the front sidewall of the sliding pin 802 and communicates with the second through hole 8022. This ensures that after the wedge portion 8021 and the connector 1 are released from the stop, the sliding pin 802 can move leftward and be inserted into the snap-on housing 801 under the guidance of the wedge groove 803 and the blocking needle 3. This not only locks the position of the sliding pin 802 and the flow regulating member 7, but also aligns the first through hole 701 with the second through hole 8022, allowing the blocking needle 3 to pass through the sliding pin 802 through the second through hole 8022, pass through the flow regulating member 7 through the first through hole 701, and be inserted into the puncture needle 2.

[0065] Initially, the flow regulating member 7 is in the first position and is set away from the puncture needle 2. At this time, the two springs 9 are in their original length state, the first through hole 701 and the second through hole 8022 are staggered, and the wedge-shaped portion 8021 and the inner tube wall of the horizontal branch of the connecting member 1 form a stop fit.

[0066] Before use, first connect the puncture needle 2 to the rear pipe opening of the horizontal branch pipe of the connecting piece 1 through the installation end, and then insert the small end of the blocking needle 3 into the horizontal branch pipe and the puncture needle 2 from the front to the back from the front pipe opening of the horizontal branch pipe of the connecting piece 1.

[0067] When the blocking needle 3 moves to the position corresponding to the sliding pin 802 and the snap-on shell 801, the wedge-shaped portion 8021 is suspended in the air and disengages from the stopper cooperation with the connecting member 1. Under the guidance of the wedge groove 803 and the blocking needle 3, the sliding pin 802 moves to the left and is inserted into the snap-on shell 801, locking the position of the sliding pin 802 and the flow regulating member 7 on the one hand and aligning the first through hole 701 with the second through hole 8022 on the other hand, so that the blocking needle 3 can pass through the sliding pin 802 through the second through hole 8022, pass through the flow regulating member 7 through the first through hole 701, and be inserted into the puncture needle 2.

[0068] During use, the puncture needle 2 is first inserted into the patient's lumbar spine; the pressure measuring tube 4 and the sampling bottle 5 are then connected to the connector 1; the blocking needle 3 is then removed from the back to the front. After the blocking needle 3 is removed, the front spring 9, which is in a stretched state, and the rear spring 9, which is in a compressed state, simultaneously release their elastic potential energy, driving the flow regulating member 7 to move rapidly forward. During this process, although the opening formed by the flow regulating member 7 and the rear half of the horizontal branch of the connector 1 gradually increases, the opening size remains small due to the initial stroke limit, effectively limiting the flow rate of cerebrospinal fluid outflow and preventing excessive flow rate. At the same time, the sliding pin 802, guided by the wedge surface and the snap-on housing 801, automatically retracts into the interior of the flow regulating member 7, avoiding obstruction of the flow regulating member 7's sliding. As the flow regulating member 7 continues to move, the front spring 9 switches from tension to compression, and the rear spring 9 switches from compression to tension. Through the alternating elastic force changes of the springs 9, the movement speed of the flow regulating member 7 gradually decreases. When the speed of flow regulator 7 drops to zero, the elastic force of spring 9 again drives it to accelerate backward in the opposite direction, gradually reducing the size of the opening, further controlling the flow of cerebrospinal fluid. Thus, under the periodic elastic action of spring 9, flow regulator 7 reciprocates within the horizontal branch of connector 1, undergoing multiple cycles of forward and backward movement before ultimately returning to its first position. This dynamic adjustment mechanism enables adaptive flow control throughout the entire cerebrospinal fluid discharge process, effectively avoiding the risk of patient discomfort caused by abnormal flow and ensuring the safety and stability of the pressure measurement process.

[0069] In a further embodiment, in order to facilitate the disassembly and assembly of the flow regulating member 7 and the spring 9, a plug 10 is inserted at the end of the horizontal section away from the puncture needle 2, and the plug 10 and the connecting member 1 can be detachably connected; one end of the spring 9 set away from the puncture needle 2 is set on the plug 10.

[0070] Specifically in this embodiment, the plug 10 is inserted into the front pipe opening of the horizontal branch pipe of the connector 1 during installation. The front end of the front spring 9 abuts against the plug 10.

[0071] During the installation process, the flow regulating member 7 and the spring 9 are treated as an integral component and inserted into the interior of the horizontal branch pipe from the front pipe opening of the horizontal branch pipe of the connector 1; then, the plug 10 is inserted into the front pipe opening of the horizontal branch pipe, and the overall assembly is completed through the detachable connection between the plug 10 and the connector 1; during the disassembly process, it is only necessary to release the connection between the plug 10 and the connector 1 and remove the plug 10 from the front pipe opening of the horizontal branch pipe, and the flow regulating member 7 and the spring 9 can be taken out as a whole, thereby enabling the disassembly and assembly process and improving maintenance convenience.

[0072] Furthermore, in order to improve the convenience of installing the blocking needle 3, a mounting tube 702 is coaxially arranged on the front end face of the flow regulating member 7. The mounting tube 702 is connected to the first through hole 701 and is slidably inserted into the plug 10 during installation; the blocking needle 3 is inserted into the mounting tube 702 during installation, thereby ensuring that the blocking needle 3 is accurately aligned with the first through hole 701 through the guiding and positioning function of the mounting tube 702, effectively avoiding assembly errors caused by installation deviations, and improving installation efficiency and assembly accuracy.

[0073] Furthermore, in order to ensure the sealing between the flow regulating member 7 and the horizontal branch pipe of the connecting member 1, the outer peripheral wall of the mounting tube 702 is set to a square structure; based on the geometric characteristics of the square structure, a circumferential rotation restriction can be formed on the flow regulating member 7, so that the flow regulating member 7 cannot rotate in the horizontal branch pipe of the connecting member 1, thereby ensuring that the sealing structure between the flow regulating member 7 and the horizontal branch pipe always remains stable, avoiding sealing failure due to relative rotation, and ensuring the sealing and stability during fluid transmission.

[0074] In a further embodiment, the plug 10 and the connector 1 form a threaded fit.

[0075] Specifically, in this embodiment, matching threaded structures are provided on the outer surface of plug 10 and the inner surface of the front end of the horizontal branch of connector 1. During installation, the threads engage to secure the two, and during removal, they can be separated by reverse rotation. The threaded engagement between plug 10 and connector 1 not only provides reliable connection strength, but also offers the advantages of easy assembly and disassembly and precise positioning, further enhancing the reliability of the overall structure.

[0076] In other embodiments, the control valve 6 is configured to include a valve core 601 and a sealing member 602 , wherein the valve core 601 is threadedly inserted into the connector 1 ; the sealing member 602 is located in the connecting channel 101 and can form a sealing fit with the valve core 601 .

[0077] Specifically in this embodiment, the valve core 601 is a T-shaped stepped shaft structure with a large end and a small end. To facilitate installation of the valve core 601, a positioning tube 103 is provided on the right peripheral sidewall of the horizontal branch pipe of the connector 1. The axis of the positioning tube 103 extends horizontally in the left-right direction. During installation, the small end of the valve core 601 is threadedly inserted into the mounting tube 702, with the large end located outside the mounting tube 702. The sealing member 602 is a hemispherical shell structure and is installed on the left inner peripheral wall of the horizontal branch pipe of the connector 1 during installation. The opening of the sealing member 602 faces the mounting tube 702. The small end of the valve core 601 is a spherical structure, ensuring a sealed fit with the inner spherical surface of the sealing member 602.

[0078] Optionally, in order to improve the convenience of operating the valve core 601, a plurality of anti-slip protrusions are provided on the circumferential side wall of the large end of the valve core 601.

[0079] In other embodiments, in order to ensure that cerebrospinal fluid can flow smoothly into the sampling bottle 5 and ensure sampling efficiency, an air vent 102 is provided at the connection point between the sampling container and the connecting channel 101. The air vent 102 is located below the control valve 6 and is connected to the external environment.

[0080] Specifically in this embodiment, the air outlet 102 is an arc-shaped structure and is coaxially opened on the circumferential side wall of the lower half of the vertical branch pipe of the connector 1 .

[0081] During use, when cerebrospinal fluid flows into the sampling bottle 5 through the connecting channel 101, the air in the sampling bottle 5 is compressed due to the injection of liquid, and the air pressure increases. At this time, the air outlet 102 serves as a gas discharge channel, allowing the pressurized air in the sampling bottle 5 to be quickly and smoothly discharged to the external environment, thereby maintaining the air pressure balance inside and outside the sampling bottle 5. This air pressure balance mechanism eliminates the obstruction to the flow of cerebrospinal fluid caused by the excessive air pressure in the sampling bottle 5, ensuring that the cerebrospinal fluid can continue to flow into the sampling bottle 5 at a stable flow rate, significantly improving the sampling efficiency of the cerebrospinal fluid. In addition, the connection between the air outlet 102 and the external environment can also effectively avoid the cerebrospinal fluid reflux caused by the negative pressure formed in the sampling bottle 5 during the sampling process, thereby ensuring the safety of the sampling process and the accuracy of the sampling results.

[0082] Optionally, there may be a plurality of air outlet holes 102 , and the air outlet holes 102 may be arranged circumferentially.

[0083] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that variations and modifications are possible without departing from the scope of the present invention, and such variations and modifications are fully within the scope of protection of the present invention.

Claims

1. A sampling device for neurological examination, characterized in that: The sampling device for neurological examination includes a connecting piece; the connecting piece has a connecting channel arranged through it, the connecting channel is cross-shaped and has a horizontal section and a vertical section; the two outlets of the horizontal section are respectively provided with a puncture needle and a blocking needle, the puncture needle is connected to the connecting channel, and when in use, penetrates the patient's lumbar spine, and is configured to be able to introduce cerebrospinal fluid into the connecting channel; the blocking needle is inserted into the puncture needle and is configured to be able to open or close the connection between the puncture needle and the connecting channel; the two outlets of the vertical section are respectively connected with a pressure measuring tube and a sampling container, the pressure measuring tube is located above the sampling container; a control valve is provided at the connection between the sampling container and the connecting channel, and the control valve is configured to be able to open or close the connection between the sampling container and the connecting channel.

2. The sampling device for neurological examination according to claim 1, characterized in that: A flow regulating member is inserted in the horizontal section. The flow regulating member can slide elastically along the extension direction of the horizontal section, and has corresponding first and second positions before and after sliding. When in the first position, the flow regulating member is set away from the puncture needle. When in the second position, the flow regulating member is located at the intersection of the horizontal section and the vertical section. The sampling device for neurological examination also includes a position adjustment component, which is configured to adjust the position of the flow regulating member.

3. The sampling device for neurological examination according to claim 2, characterized in that: The positioning assembly includes a snap-on shell and a sliding pin, the snap-on shell is arranged on the connecting piece, and is located at the intersection of the horizontal section and the vertical section, and is connected to the connecting channel; the sliding pin is inserted in the flow regulating piece, and is sleeved on the blocking needle, and can slide in a direction perpendicular to the extension direction of the horizontal section; the sliding pin has a wedge-shaped portion, and the wedge-shaped portion can form a stop fit with the connecting piece, and can be inserted into the snap-on shell, and can form a guiding fit with the snap-on shell; a wedge groove is provided in the sliding pin, and the wedge groove can form a guiding fit with the blocking needle.

4. The sampling device for neurological examination according to claim 2, characterized in that: Elastic members are connected between the flow regulating member and both ends of the horizontal section.

5. The sampling device for neurological examination according to claim 4, characterized in that: The elastic member is a spring.

6. The sampling device for neurological examination according to claim 5, characterized in that: A plug is inserted into the end of the horizontal section away from one end of the puncture needle, and the plug and the connecting piece are detachably connected; one end of the spring arranged away from the puncture needle is arranged on the plug.

7. The sampling device for neurological examination according to claim 6, characterized in that: The plug and the connecting piece form a threaded fit.

8. The sampling device for neurological examination according to claim 1, characterized in that: The control valve includes a valve core and a sealing member. The valve core is threadedly inserted into the connecting member. The sealing member is located in the connecting channel and can form a sealing fit with the valve core.

9. The sampling device for neurological examination according to claim 1, characterized in that: An air outlet is further provided at the connection point between the sampling container and the connecting channel. The air outlet is located below the control valve and is connected to the external environment.

10. The sampling device for neurological examination according to claim 1, characterized in that: The sampling container is a sampling bottle.

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