A device for assisting in cerebrospinal fluid extraction

Abstract

The application discloses an auxiliary cerebrospinal fluid extraction device, which comprises a mounting seat, an extension plate is fixedly installed on the side of the mounting seat, a limiting block is formed on the side edge of the extension plate, a guide plate is arranged at the top end of the mounting seat in an inclined manner, a suction disc is fixedly installed at the bottom center of the mounting seat, and a plurality of irregular protrusions are sequentially distributed on the inner wall of the guide plate from top to bottom. The guide plate and the irregular protrusions are arranged, first, a physician adjusts the needle tip of a puncture needle to a proper angle, and then slides the puncture needle into the guide plate. When the puncture needle is offset and axially rotated when being pierced, the vertical track as a whole is affected by the static friction force of the rotation of the puncture needle, is twisted to one side, and gradually increases the contact area on the surface of the puncture needle. The arc-shaped tracks at the two ends of the vertical track can respectively provide a pushing force and a pulling force on the surface of the puncture needle, prevent the axial rotation of the puncture needle, and achieve the purpose of protecting the patient and improving the safety of the device.

Description

Technical Field

[0001] This invention relates to the field of cerebrospinal fluid assisted sampling technology, specifically to an assisted cerebrospinal fluid extraction device. Background Technology

[0002] Lumbar puncture is a diagnostic technique that involves puncturing the intervertebral space in the lumbar region to extract cerebrospinal fluid (CSF). It is used to measure intracranial pressure, analyze CSF composition, and assist in the diagnosis of central nervous system diseases. The specific sampling procedure involves placing the patient in a left lateral decubitus position with the neck, hip, and knee flexed. The L3-L4 vertebrae are selected as the puncture points. After routine disinfection and draping, local infiltration anesthesia is administered at the L3-L4 vertebrae, and the lumbar puncture needle is inserted. Once the needle enters the subarachnoid space, the core of the needle is withdrawn, and clear or colored, or pathological CSF will flow out. Before extracting CSF, the pressure of the CSF needs to be measured. During the CSF collection process, the collection rate should be slow, and the amount should be adjusted according to the intracranial pressure.

[0003] In current cerebrospinal fluid (CSF) extraction procedures, the needle tip needs to be slightly tilted towards the patient's brain to extract high-quality CSF. Furthermore, the needle angle must be parallel to the direction of the dura mater (i.e., the needle's slope should face the patient's left or right side, not the head or feet) to minimize dural damage. Currently, the angle is mainly controlled manually by the physician, resulting in a large controllable margin of error. During the puncture, the needle needs to penetrate the dura mater to reach the subarachnoid space. Therefore, when encountering resistance, the physician is prone to needle deviation and axial rotation, causing the needle tip to deviate from its optimal angle distribution as it penetrates, thus affecting the overall quality of the extraction process. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an auxiliary cerebrospinal fluid (CSF) extraction device. This device solves the problem that current CSF extraction methods require the needle tip to be slightly tilted towards the patient's brain to extract high-quality CSF, and the needle angle must be parallel to the direction of the dura mater (i.e., the needle's slope should face the patient's left or right side, not the head or feet) to reduce dura mater damage. Currently, the needle tip angle is mainly controlled manually by the physician, leading to a large controllable error range. Furthermore, during the puncture process, the needle needs to penetrate the dura mater to reach the subarachnoid space. Therefore, when encountering resistance, the physician can easily cause the needle to deviate and rotate axially, resulting in the needle tip not remaining within a reasonable angle distribution range as it gradually penetrates, thus affecting the overall quality of the extraction process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary cerebrospinal fluid extraction device, comprising a mounting base, an extension plate fixedly mounted on the side of the mounting base, a limiting block fixedly formed on the side of the extension plate, a guide plate inclinedly arranged at the top of the mounting base, a suction cup fixedly mounted at the center of the bottom end of the mounting base, and a plurality of irregular protrusions distributed from top to bottom on the inner wall of the guide plate. The irregular protrusion includes a vertical track, with a pair of arc tracks arranged symmetrically at both ends of the vertical track. The vertical track is vertical in general and is parallel to the central axis of the guide plate. The ends of the arc tracks are semi-circular arcs, and the pair of arc tracks are twisted toward the middle of the vertical track.

[0006] Preferably, the restricting block protrudes obliquely upward toward the extension plate, and the edges of the restricting block remain rounded.

[0007] Preferably, multiple irregular protrusions are distributed in a ring on the inner wall of the guide plate, and the overall distribution curvature of the irregular protrusions is the same as the curvature of the guide plate.

[0008] Preferably, the tilt angle of the guide plate is in the range of 15° to 45°, the inner wall surface of the guide plate is smooth, and the overall cross-section of the guide plate is semi-circular.

[0009] Preferably, one side of the top of the mounting base is flush with the cover of the guide plate, and the entire material of the mounting base is a rigid non-metallic material, and the length of the guide plate is between 1cm and 3cm.

[0010] Preferably, the upper half of the guide plate extends towards the top of the mounting base at a greater distance than the lower half of the guide plate extends towards the bottom of the mounting base.

[0011] Preferably, the surface of the extension plate is provided with anti-slip stripes, the bottom surface of the extension plate is horizontally distributed with the bottom surface of the mounting base, and the edge of the limiting block has an arc transition design with the extension plate.

[0012] This invention provides an auxiliary device for cerebrospinal fluid extraction, which has the following beneficial effects: This invention utilizes a guide plate and irregular protrusions. First, the surgeon adjusts the needle tip to a suitable angle and slides it into the guide plate. The needle is then gradually inserted into the predetermined position along the inner wall of the guide plate. At this point, the irregular protrusions on the inner wall of the guide plate contact the surface of the needle, allowing it to glide smoothly over the vertical trajectory, ensuring a successful puncture. When the needle penetrates the dura mater and reaches the subarachnoid space, it encounters resistance and deflects and rotates axially. At this point, the entire vertical trajectory is punctured. The static friction during needle rotation causes the needle to twist to one side, gradually increasing its contact area on the needle surface. Simultaneously, the arc-shaped tracks at both ends of the vertical track exert pushing and pulling forces on the needle surface, respectively. For example, when the needle rotates counterclockwise, the arc-shaped track on the opposite side of the rotation direction resists the pushing force, while the arc-shaped track on the other side of the vertical track exerts a pulling force. Together, they restrict the needle, preventing it from rotating along its axis, thus protecting the patient and further improving the safety of the device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a schematic diagram of the state side structure of the present invention; Figure 4 This is a schematic diagram of the insertion state of the puncture needle of the present invention; Figure 5 This is a top view of the overall structure of the present invention; Figure 6 This is a schematic diagram of a partial surface structure of the inner wall of the guide plate of the present invention.

[0014] The attached figures are labeled as follows: 1. Mounting base; 2. Extension plate; 3. Restriction block; 4. Guide plate; 5. Suction cup; 6. Irregular protrusion; 61. Vertical track; 62. Arc track. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] As attached Figure 1 To be continued Figure 6The device shown is an auxiliary cerebrospinal fluid extraction device, including a mounting base 1, an extension plate 2 fixedly mounted on the side of the mounting base 1, a limiting block 3 fixedly formed on the side of the extension plate 2, a guide plate 4 inclined at the top of the mounting base 1, a suction cup 5 fixedly mounted at the center of the bottom end of the mounting base 1, and a plurality of irregular protrusions 6 distributed from top to bottom on the inner wall of the guide plate 4. The irregular protrusion 6 includes a vertical track 61, with a pair of arc-shaped tracks 62 symmetrically arranged at both ends of the vertical track 61. The vertical track 61 is vertical in general and is parallel to the central axis of the guide plate 4. The ends of the arc-shaped tracks 62 are semi-circular, and the pair of arc-shaped tracks 62 are twisted toward the middle of the vertical track 61. With the above arrangement, the pair of arc-shaped tracks 62 are twisted toward the middle of the vertical track 61, so that the arc-shaped tracks 62 at both ends of the vertical track 61 will exert pushing and pulling forces on the surface of the puncture needle, thereby effectively restricting the puncture needle from rotating counterclockwise or clockwise within the guide plate 4, further improving the practicality of the device.

[0017] Multiple irregular protrusions 6 are distributed in a ring on the inner wall of the guide plate 4, and the overall arc of the irregular protrusions 6 is the same as the arc of the guide plate 4. The tilt angle of the guide plate 4 is in the range of 15° to 45°. The inner wall surface of the guide plate 4 is smooth. The overall cross-section of the guide plate 4 is semi-circular. One side of the top of the mounting base 1 is flush with the cover of the guide plate 4. The entire material of the mounting base 1 is a rigid non-metallic material. The length of the guide plate 4 is between 1cm and 3cm. The upper half of the guide plate 4 extends towards the top of the mounting base 1. The extension distance is greater than the extension distance of the lower plate of the guide plate 4 towards the bottom of the mounting base 1. The surface of the extension plate 2 is provided with anti-slip stripes. The bottom surface of the extension plate 2 is horizontally distributed with the bottom surface of the mounting base 1. The edge of the limiting block 3 has an arc transition design with the extension plate 2. Through the above settings, it can be ensured that when the guide plate 4 guides the puncture needle to insert, the puncture needle is mainly limited to its tip, thereby effectively controlling the positional change of the needle tip and further improving the safety and effectiveness of the device puncture process, avoiding adverse deviation and rotation of the needle tip.

[0018] Please refer to the attached instruction manual for details. Figure 3 The restricting block 3 protrudes obliquely upward toward the extension plate 2, and the edge of the restricting block 3 remains arc-shaped.

[0019] The specific implementation method is as follows: the limiting block 3 protrudes diagonally upward towards the extension plate 2, so that when medical staff wrap and fix the extension plate 2 on one side of the mounting base 1 with a strap, the limiting block 3 can block the strap to prevent it from loosening and slipping off the side of the extension plate 2, thereby further improving the safety of the device.

[0020] Working principle of the invention: Step 1: First, the physician fixes the mounting base 1 to the puncture area on the patient's back using the suction cup 5 below the mounting base 1. At the same time, the lower part of the guide plate 4 is aligned with the puncture point. The puncture point is selected based on the physician's experience or by ultrasound scanning. This process is a current medical technology and will not be elaborated here. Depending on the actual situation, the bandage is wrapped around the patient's waist once and then wrapped around the extension plate 2 on one side of the mounting base 1 for secondary reinforcement.

[0021] Step Two: First, the operator adjusts the tip of the puncture needle to the appropriate angle and slides it into the guide plate 4. The puncture needle is then gradually inserted into the predetermined position along the inner wall of the guide plate 4. At this time, the irregular protrusion 6 on the inner wall of the guide plate 4 will contact the surface of the puncture needle. The puncture needle can then smoothly glide across the surface of the vertical track 61, ensuring the smooth progress of the puncture process. When the puncture needle penetrates the dura mater and reaches the subarachnoid space, it encounters resistance and deviates and rotates axially. At this time, the vertical track 61 will be affected by the static friction force of the rotating puncture needle, twisting to one side and gradually increasing its... The contact area of ​​the puncture needle surface, and the arc-shaped tracks 62 at both ends of the vertical track 61, will respectively exert pushing and pulling forces on the surface of the puncture needle. For example, when the puncture needle rotates counterclockwise, the arc-shaped track 62 on the opposite side of the rotation direction will resist the pushing force, while the arc-shaped track 62 on the other side of the vertical track 61 will exert a pulling force. Thus, they work together to restrict the puncture needle, prevent it from rotating along its axis, and thereby achieve the purpose of protecting the patient. This ensures that the tip of the puncture needle remains in the predetermined posture throughout the puncture process, further improving the safety of the device.

[0022] Step 3: After the procedure is completed, the physician slowly repositions the needle core, removes the puncture needle, disinfects the puncture site again, and then covers it with a sterile dressing for recovery.

[0023] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for assisting in cerebrospinal fluid extraction, characterized in that: The device includes a mounting base, an extension plate fixedly mounted on the side of the mounting base, a limiting block fixedly formed on the side of the extension plate, a guide plate inclinedly arranged at the top of the mounting base, a suction cup fixedly mounted at the center of the bottom end of the mounting base, and multiple irregular protrusions distributed sequentially from top to bottom on the inner wall of the guide plate. The irregular protrusion includes a vertical track, with a pair of arc tracks arranged symmetrically at both ends of the vertical track. The vertical track is vertical in general and is parallel to the central axis of the guide plate. The ends of the arc tracks are semi-circular arcs, and the pair of arc tracks are twisted toward the middle of the vertical track.

2. The auxiliary cerebrospinal fluid extraction device according to claim 1, characterized in that: The entire restricting block protrudes obliquely upward toward the extension plate, and the edges of the restricting block remain rounded.

3. The auxiliary cerebrospinal fluid extraction device according to claim 1, characterized in that: Multiple irregular protrusions are distributed in a ring on the inner wall of the guide plate, and the overall arc of the irregular protrusions is the same as the arc of the guide plate.

4. The auxiliary cerebrospinal fluid extraction device according to claim 1, characterized in that: The guide plate has an inclination angle in the range of 15° to 45°, the inner wall surface of the guide plate is smooth, and the overall cross-section of the guide plate is semi-circular.

5. The auxiliary cerebrospinal fluid extraction device according to claim 1, characterized in that: The top side of the mounting base is flush with the cover of the guide plate, and the entire material of the mounting base is a rigid non-metallic material. The length of the guide plate is between 1cm and 3cm.

6. The auxiliary cerebrospinal fluid extraction device according to claim 1, characterized in that: The upper half of the guide plate extends towards the top of the mounting base at a greater distance than the lower half of the guide plate extends towards the bottom of the mounting base.

7. The auxiliary cerebrospinal fluid extraction device according to claim 1, characterized in that: The surface of the extension plate is provided with anti-slip stripes, the bottom surface of the extension plate is horizontally distributed with the bottom surface of the mounting base, and the edge of the limiting block has an arc transition design with the extension plate.

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