Novel lumbar puncture needle

Abstract

The utility model discloses a novel lumbar puncture needle, and relates to the technical field of lumbar puncture needles. The syringe comprises a needle tube used for puncture operation, and the tail end of the needle tube is connected with a first duckbilled silica gel one-way valve; the needle core can be inserted into the needle tube and is used for puncturing, a groove is formed in the surface of the needle core, and cerebrospinal fluid can flow out through the groove. Due to the design that the groove is formed in the surface of the needle core, cerebrospinal fluid can still flow out through the groove even if the needle core is completely inserted into the needle tube, so that a doctor can immediately judge whether the cerebrospinal fluid flows out or not and confirm whether the needle core correctly enters the subarachnoid space or not. By means of the design, operation is greatly simplified, the step of repeatedly pulling out the needle core is reduced, the efficiency and accuracy of the puncture process are improved, and discomfort of a patient is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of lumbar puncture needles, specifically, it relates to a novel lumbar puncture needle. Background Technology

[0002] Lumbar puncture is a commonly used clinical diagnostic procedure that can obtain cerebrospinal fluid, which can be used to diagnose various inflammatory diseases of the central nervous system, vascular diseases, spinal cord lesions, suspected intracranial space-occupying lesions, and neurological diseases with unclear diagnoses. It has important value in the diagnosis and treatment of neurological diseases, and no imaging examination can replace the importance of lumbar puncture.

[0003] The main steps of a lumbar puncture are as follows: 1) The patient lies supine without a pillow, with neck and hip flexed, hands clasped around knees, and shoulders perpendicular to the bed surface; 2) The L3-L4 or L4-L5 intervertebral space is selected; 3) Disinfection, draping, and local anesthesia are administered; 4) The puncture needle reaches the subarachnoid space after two missed sensations; 5) Pressure measurement: The stylet is removed, an L-shaped pressure measuring tube is connected, cerebrospinal fluid flows into the L-shaped pressure measuring tube, and the corresponding value is read; 6) The cerebrospinal fluid is collected for testing; 7) The L-shaped pressure measuring tube is removed, the stylet is replaced, the lumbar puncture needle is removed, disinfection is repeated, and sterile gauze is applied for pressure for 5-10 minutes. The procedure is completed, and the patient lies supine without a pillow for 6 hours post-procedure.

[0004] The surgical instrument used for lumbar puncture is a lumbar puncture needle, which includes a needle tube and a needle core. During the puncture, the needle core is inserted into the needle tube. After the puncture is completed, the needle core is removed. An L-shaped manometer can be connected to the opening at the end of the needle tube to measure intracranial pressure. After the pressure measurement is completed, the L-shaped manometer is removed, and then cerebrospinal fluid flows out from the end of the needle tube and is collected in a test tube.

[0005] Current problems with lumbar punctures include: 1) During a lumbar puncture, a sensation of breakthrough is usually felt when the needle stylet penetrates the dura mater and enters the subarachnoid space. However, because the inner diameter of the needle tube and the outer diameter of the stylet are perfectly matched without any gaps, cerebrospinal fluid (CSF) cannot flow out through the needle tube. This means that even if the stylet is in the correct position, CSF will not flow out until the stylet is completely withdrawn. Therefore, the doctor must repeatedly withdraw the stylet to confirm whether the needle has successfully entered the subdural space, increasing the complexity and operation time of the puncture process.

[0006] 2) When the needle successfully enters the subdural space and the stylet is removed, cerebrospinal fluid often flows rapidly from the tail of the needle. At this point, the operator needs to use their left hand to hold the needle in place and their left thumb to seal the tail of the needle to prevent the cerebrospinal fluid from flowing out too quickly. During this process, the right hand needs to place the stylet aside and quickly retrieve an L-shaped manometry tube, connecting it to the tail of the needle to measure intracranial pressure. This operation is not only cumbersome but also requires a high degree of flexibility and coordination from the operator, increasing the uncertainty and risk during the procedure.

[0007] 3) After completing the pressure measurement, the doctor needs to remove the L-shaped manometry tube and then collect the cerebrospinal fluid sample again. To control the cerebrospinal fluid flow rate, the doctor must reinsert the needle stylet into the syringe, adjust the depth and direction of the stylet, and change the gap between the outer diameter of the stylet and the inner diameter of the syringe to control the cerebrospinal fluid flow rate. This process requires the doctor to repeatedly adjust the stylet to ensure that the cerebrospinal fluid flow rate is appropriate and stable. If intracranial pressure measurement needs to be performed again during the collection process, the doctor must repeat the above steps: remove the stylet, hold the syringe in place with the left hand, and use the manometry tube with the right hand to perform the measurement again. This repetitive operation is not only time-consuming but also makes it difficult to accurately control the cerebrospinal fluid flow rate, increasing the operational risks for the patient and the workload of the doctor.

[0008] In view of this, this utility model is proposed. Utility Model Content

[0009] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a new type of lumbar puncture needle, which solves the problems mentioned in the background art.

[0010] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0011] A novel lumbar puncture needle includes: a needle tube for performing puncture operations, and a first duckbill-shaped silicone one-way valve connected to the tail end of the needle tube;

[0012] The needle core is inserted into the needle tube and used for puncture. The surface of the needle core is provided with a groove through which cerebrospinal fluid can flow out.

[0013] The three-way tube has a ⊥-shaped structure. The front end is connected to the back end of the needle tube, the back end is used to receive cerebrospinal fluid and guide its flow to the collection container, and the upper end is connected to a pressure measuring tube for measuring intracranial pressure.

[0014] A three-way diverting valve is installed on one side of the three-way pipe to control the direction of cerebrospinal fluid flow.

[0015] Optionally, the three-way steering valve has a ⊥-shaped channel. The horizontal channel of the ⊥-shaped channel runs through the diameter of the steering valve, while the vertical channel only runs through the radius of the steering valve and is connected to the horizontal channel.

[0016] Optionally, a second duckbill-shaped silicone check valve is provided behind the transverse channel of the ⊥-shaped channel. The opening direction of the second duckbill-shaped silicone check valve is from back to front, and the opening of the second duckbill-shaped silicone check valve faces the end of the three-way pipe that flows into the collection container.

[0017] Optionally, one end of the three-way directional valve is fixedly connected to a knob that is easy for personnel to rotate, and a cylindrical groove is provided on one side of the three-way pipe, and the three-way directional valve is rotatably connected inside the cylindrical groove.

[0018] Optionally, both the syringe and the pressure measuring tube have graduations on their outer surfaces.

[0019] Optionally, the outer diameter of the needle core of the needle tube matches the inner diameter of the front end of the needle tube, the diameter of the tail end of the needle tube is larger than the diameter of the front end of the needle tube, and a baffle is connected to one end of the needle tube, and the outer diameter of the baffle is larger than the diameter of the tail end of the needle tube.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0021] 1. This invention features a groove design on the surface of the needle core, allowing cerebrospinal fluid to flow out even when the needle core is fully inserted into the needle tube. This enables doctors to immediately determine whether cerebrospinal fluid is flowing out and confirm that the needle core has correctly entered the subarachnoid space. This design greatly simplifies the operation, reduces the need for repeated needle core removal, improves the efficiency and accuracy of the puncture process, and reduces patient discomfort.

[0022] 2. By installing a first duckbill-shaped silicone check valve at the end of the syringe, this design effectively solves the problem of flow rate control. A second duckbill-shaped silicone check valve automatically closes after the needle core is withdrawn, preventing excessively rapid outflow of cerebrospinal fluid. The valve only opens when pressure measurement or cerebrospinal fluid collection is required, ensuring the flow rate of cerebrospinal fluid remains within a controlled range. Doctors no longer need to manually close the syringe end, simplifying the procedure, improving operational safety and flow rate controllability, thereby avoiding errors and potential risks caused by cerebrospinal fluid leakage and unstable flow rates.

[0023] 3. Through the combination of the three-way tube and the three-way diverting valve, doctors can quickly switch to pressure measurement or collection modes by simply adjusting the direction of cerebrospinal fluid flow. The structure of the three-way tube allows cerebrospinal fluid to flow smoothly into the collection container or pressure measurement tube without repeatedly inserting and removing the needle core or adjusting the flow rate, simplifying the entire operation. This design not only improves operational efficiency and reduces operation time, but also greatly reduces the risks caused by repeated operations, ensuring the safety and accuracy of the procedure.

[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0026] In the picture:

[0027] Figure 1A schematic diagram of the three-dimensional structure of a waist threading needle;

[0028] Figure 2 A schematic diagram of the internal three-dimensional structure of a waist threading needle;

[0029] Figure 3 This is a three-dimensional structural diagram of the needle core located inside the needle tube.

[0030] Figure 4 A schematic diagram of the internal three-dimensional structure of the needle core located inside the needle tube;

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of a T-junction pipe;

[0032] Figure 6 This is a schematic diagram of the three-dimensional structure of the needle core.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Needle tube; 2. First duckbill-shaped silicone check valve; 3. Needle core; 4. Three-way tube; 5. Pressure measuring tube; 6. Three-way diverting valve; 7. ⊥-shaped channel; 8. Second duckbill-shaped silicone check valve; 10. Cylindrical groove; 11. Baffle.

[0035] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings.

[0037] Please see Figure 1-6 As shown, this embodiment provides a novel lumbar puncture needle, including a needle tube 1 for puncture operations. The tail end of the needle tube 1 is connected to a first duckbill-shaped silicone one-way valve 2. A second duckbill-shaped silicone one-way valve 8 is made of flexible silicone and has good sealing performance, preventing disordered flow of cerebrospinal fluid during the puncture operation and avoiding the risk of excessively rapid cerebrospinal fluid outflow in traditional designs. When the first duckbill-shaped silicone one-way valve 2 is closed, cerebrospinal fluid cannot flow out through the second duckbill-shaped silicone one-way valve 8; that is, cerebrospinal fluid cannot flow out from behind the needle tube 1 when the second duckbill-shaped silicone one-way valve 8 is closed. Using this structure, when the needle core 3 is withdrawn, cerebrospinal fluid cannot flow out from behind the needle tube 1. This avoids inaccurate pressure measurements or inducing brain herniation due to rapid cerebrospinal fluid outflow.

[0038] The needle core 3 is inserted into the needle tube 1 for puncture. The surface of the needle core 3 has a groove 12 through which cerebrospinal fluid can flow out. The needle core 3 can be inserted into the needle tube 1 to complete the puncture task. The groove 12 on the surface of the needle core 3 allows cerebrospinal fluid to flow out naturally when the needle core 3 is inserted to an appropriate depth, eliminating the need for repeated checks by removing the needle core 3. This design effectively avoids the hassle of repeatedly adjusting and removing the needle core 3 during puncture, as in existing technologies, making the puncture operation simpler and more efficient.

[0039] The three-way valve 4 has a U-shaped structure. Its front end connects to the rear end of the syringe 1, and the rear end is used to receive cerebrospinal fluid and guide its flow to a collection container. Its upper end is connected to a pressure measuring tube 5 for measuring intracranial pressure. The front end of the three-way valve 4 is relatively long and can connect to the rear end of the syringe 1, opening the first duckbill-shaped silicone one-way valve 2 at the rear of the syringe 1. With the rear end of the three-way valve 4 open, cerebrospinal fluid can flow out through it and be collected in a test tube. The upper end of the three-way valve 4 can be connected to the graduated plastic pressure measuring tube 5. Intracranial pressure can be obtained by reading the height of the cerebrospinal fluid in the plastic pressure measuring tube 5.

[0040] A three-way diverting valve 6 is installed on one side of the three-way pipe 4 to control the direction of cerebrospinal fluid flow. The valve contains a ⊥-shaped channel 7. The horizontal channel of the ⊥-shaped channel 7 extends through the diameter of the valve, while the vertical channel only extends through the radius. Behind the horizontal channel of the ⊥-shaped channel 7 is a second duckbill-shaped silicone check valve 8. The second duckbill-shaped silicone check valve 8 opens from back to front, with its opening facing the end of the three-way pipe 4 that flows into the collection container. By rotating the three-way diverting valve 6, the ⊥-shaped channel 7 within the valve 6 aligns with the direction of the ⊥-shaped three-way pipe 4, at which point the second duckbill-shaped silicone check valve 8 is in the closed state. Connecting this structure to the rear of needle tube 1 prevents cerebrospinal fluid (CSF) from flowing out through the rear of the three-way valve 4. Instead, it flows only to the graduated plastic pressure measuring tube 5 at the upper end of the three-way valve 4. The intracranial pressure can be obtained by reading the height of CSF in the plastic pressure measuring tube 5. Rotating the three-way valve 6 180 degrees transforms the U-shaped channel 7 of the three-way valve 6 into a T-shaped channel. At this time, the second duckbill-shaped silicone check valve 8, which was originally behind the U-shaped horizontal channel, becomes the second duckbill-shaped silicone check valve 8 in front of the T-shaped channel. The opening direction of the second duckbill-shaped silicone check valve 8 is from back to front, allowing CSF to flow out through the second duckbill-shaped silicone check valve 8 and then out through the rear of the three-way valve 4. By rotating the three-way valve 6 to adjust the overlap between the horizontal channel of the three-way valve 6 and the horizontal channel of the three-way valve 4, the flow rate of CSF can be changed, preventing excessively rapid flow that could lead to adverse consequences.

[0041] In this embodiment, one end of the three-way diverting valve 6 is fixedly connected to a knob that is convenient for personnel to rotate. A cylindrical groove 10 is provided on one side of the three-way pipe 4. The three-way diverting valve 6 is rotatably connected inside the cylindrical groove 10. The three-way diverting valve 6 can rotate inside the cylindrical groove 10 through the bearing and the setting of the sealing ring to realize the control of the flow direction.

[0042] In this embodiment, both the needle tube 1 and the pressure measuring tube 5 have graduations on their outer surfaces. By marking the graduations on the needle tube 1 and the pressure measuring tube 5, doctors can more accurately control the puncture depth and pressure measurement during the puncture process, avoiding the limitations of relying solely on experience in traditional operations. The graduations help doctors quickly confirm whether the needle core 3 has reached the target position, avoiding punctures that are too deep or too shallow, thereby reducing the risk of injury to the patient.

[0043] In this embodiment, the outer diameter of the needle core 3 of the needle tube 1 matches the inner diameter of the front end of the needle tube 1. When the needle core 3 is inserted into the needle tube 1, although the inner diameter of the needle tube 1 and the outer diameter of the needle core 3 are completely matched, cerebrospinal fluid can still flow out from the groove 12 on the surface of the needle core 3. This design allows for observation of whether cerebrospinal fluid is flowing out without removing the core during the puncture process, avoiding the disadvantage of existing puncture needles that require repeated removal of the needle core 3 to confirm whether the needle tube 1 has entered the subdural space during the puncture process.

[0044] The diameter of the tail end of the needle tube 1 is larger than the diameter of the front end of the needle tube 1. One end of the needle tube 1 is connected to a baffle 11, and the outer diameter of the baffle 11 is larger than the diameter of the tail end of the needle tube 1. The baffle 11 can prevent the needle core 3 from sliding out of the needle tube 1, thus improving the stability of the needle core 3 after installation.

[0045] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A novel lumbar puncture needle, characterized in that, include: The needle (1) is used for puncture operations, and the tail end of the needle (1) is connected to a first duckbill-shaped silicone one-way valve (2). The needle core (3) can be inserted into the needle tube (1) and used for puncture. The surface of the needle core (3) is provided with a groove (12) through which cerebrospinal fluid can flow out. Three-way tube (4), the three-way tube (4) has a ⊥-shaped structure, the front end is connected to the rear end of the needle tube (1), the rear end is used to receive cerebrospinal fluid and guide it to the collection container, and the upper end is connected to a pressure measuring tube (5) for measuring intracranial pressure. A three-way directional valve (6) is installed on one side of the three-way pipe (4) to control the direction of cerebrospinal fluid flow.

2. The novel lumbar puncture needle according to claim 1, characterized in that, The three-way steering valve (6) has a ⊥-shaped channel (7). The horizontal channel of the ⊥-shaped channel (7) extends through the diameter of the three-way steering valve (6), while the vertical channel extends only through the radius of the three-way steering valve (6) and is connected to the horizontal channel.

3. A novel lumbar puncture needle according to claim 2, characterized in that, Behind the horizontal channel of the ⊥-shaped channel (7) is a second duckbill-shaped silicone check valve (8). The opening direction of the second duckbill-shaped silicone check valve (8) is from back to front, and the opening of the second duckbill-shaped silicone check valve (8) faces the end of the three-way pipe (4) flowing into the collection container.

4. A novel lumbar puncture needle according to claim 1, characterized in that, One end of the three-way directional valve (6) is fixedly connected to a knob that is easy for people to turn. A cylindrical groove (10) is provided on one side of the three-way pipe (4), and the three-way directional valve (6) is rotatably connected inside the cylindrical groove (10).

5. A novel lumbar puncture needle according to claim 1, characterized in that, The outer surfaces of both the needle (1) and the pressure measuring tube (5) are marked with graduations.

6. A novel lumbar puncture needle according to claim 1, characterized in that, The outer diameter of the needle core (3) of the needle tube (1) matches the inner diameter of the front end of the needle tube (1). The diameter of the tail end of the needle tube (1) is greater than the diameter of the front end of the needle tube (1). One end of the needle tube (1) is connected to a baffle (11), and the outer diameter of the baffle (11) is greater than the diameter of the tail end of the needle tube (1).

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