Cerebrospinal fluid drainage catheter component and drainage system

Abstract

This invention relates to a device for transferring cerebrospinal fluid (CSF) from the ventricles of the brain to body cavities in other parts of the human body. Specifically, this invention discloses a CSF drainage catheter component and a drainage system. The CSF drainage catheter component includes: a catheter body with multiple rows of main long holes arranged circumferentially and axially spaced on its wall; multiple protrusions on the two linear holes of the main long holes to divide the main long holes into multiple micropores; the wall occupied by each row of main long holes is a first segment, and the wall between each two adjacent rows of main long holes is a second segment; a driving component for driving one of the two adjacent second segments to move axially relative to the other second segment, so that one end of the main long hole moves axially relative to the other end in the circumferential direction, thereby causing the two linear holes of the main long hole to move relative to each other in the circumferential direction, thereby causing the protrusions to disturb the interior of the main long hole.

Description

Technical Field

[0001] This invention relates to a device for transferring bodily fluids from the human body, and more particularly to a cerebrospinal fluid drainage catheter component and drainage system. Background Technology

[0002] Brain injury, diseases of the brain tissue itself, and surgical trauma can all lead to an excessive accumulation of cerebrospinal fluid in the ventricles, causing a significant increase in intraventricular pressure, a phenomenon commonly known as hydrocephalus. Regardless of the cause of hydrocephalus, draining the excess cerebrospinal fluid from the ventricles to reduce the intraventricular pressure to a reasonable level (at least to a level that will not cause serious consequences to the brain tissue) is the primary and urgent medical treatment.

[0003] Cerebrospinal fluid shunting procedure (CSF) is a treatment that diverts intracranial cerebrospinal fluid (CSF) to other body cavities (such as the abdominal or pleural cavities) to restore the balance between CSF secretion and absorption and to reduce intracranial pressure to a reasonable level. The drainage system used to perform CSF shunting typically includes: a tubular drainage component implanted within the ventricle; a drainage tube that delivers the CSF drained through the drainage component to other body cavities; and control components (such as flow control valves) on the drainage tube to control the CSF outflow and prevent over-drainage. The drainage component has a lumen surrounded by a tube wall and perforations arranged on the tube wall. Cerebrospinal fluid from the ventricle must first enter the lumen through the perforations before it can enter the drainage tube. The diameter of the perforations cannot be too large; they are required to be configured as micropores. Perforations with excessively large diameters allow materials such as protein particles, fragments, and blood clots in the cerebrospinal fluid to be guided into the drainage tube, which may cause these materials to block the drainage tube and control components. In addition, perforations with excessively large diameters allow brain tissue such as choroid plexuses growing around the drainage component to invade the tube wall of the drainage component through the perforations. Therefore, when the drainage component is removed from the ventricle, the shearing action of the edge of the perforation on the invaded brain tissue may cause brain tissue damage.

[0004] However, configuring the orifice as a micropore makes it susceptible to blockage by materials present in the cerebrospinal fluid, such as protein particles, debris, and blood clots. This can lead to high throttling pressure on the cerebrospinal fluid by the drainage component, resulting in poor drainage. Excessive throttling pressure on the cerebrospinal fluid by the drainage component may make it difficult to reduce the intraventricular pressure to a reasonable level. The consequences of micropore blockage are particularly pronounced in long-term shunt procedures.

[0005] In the existing technology, various technical means have been used to reduce the probability of micropore blockage and prolong the micropore patency cycle. A variety of drainage components have been developed to reduce the probability of micropore blockage and prolong the micropore patency cycle. However, these drainage components still have various defects. For example, a disturbance component is placed in the lumen of the drainage device, with a wire bundle attached to it, similar to a brush. By driving the disturbance component to rotate periodically, the wire bundle disturbs the wall pores to prevent them from being blocked. However, this method has the following drawbacks: the end of the wire bundle may damage brain tissue because it extends beyond the outer side of the tube wall; the disturbance component occupies part of the volume in the lumen, thus the disturbance component and the wire bundle obstruct the flow of cerebrospinal fluid to a certain extent. As another example, an ultrasound generator is installed at the tail of the drainage device, and the ultrasound generator drives the entire drainage device to vibrate ultrasonically to prevent substances such as protein particles from accumulating at the micropores and to remove substances already attached to the micropores. However, because ultrasound vibration is high-frequency vibration, it may cause emulsification of the brain tissue around the drainage device, thereby damaging the brain tissue. Summary of the Invention

[0006] To address the aforementioned technical problems in the prior art, the present invention provides a cerebrospinal fluid drainage catheter component and drainage system.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A cerebrospinal fluid drainage catheter component, comprising:

[0009] The catheter body has a tube wall and a lumen enclosed by the tube wall. The tube wall has multiple rows of main elongated holes that extend circumferentially and are spaced apart axially. The multiple rows of main elongated holes are arranged circumferentially. On the two opposite linear holes of each main elongated hole, multiple protrusions are arranged spaced apart along the extension direction of the main elongated hole to divide the main elongated hole into multiple micropores. The circumferential section of the tube wall occupied by each row of main elongated holes is a first section, and the circumferential section of the tube wall between each two adjacent rows of main elongated holes is a second section.

[0010] A driving component is used to drive one of two adjacent second segments to move axially relative to the other second segment so that one end of the main elongated hole moves axially relative to the other end in the circumferential direction, thereby causing the two linear hole walls of the main elongated hole to move relative to each other in the circumferential direction, thereby causing the protrusion to disturb the interior of the main elongated hole.

[0011] Preferably, the protrusion is configured as a wing-like structure extending from the linear wall hole; wherein:

[0012] This causes the protrusions on the two opposing linear hole walls of the main elongated hole to be close together. Thus, when one end of the main elongated hole is driven to move axially relative to the other end in the circumferential direction, causing the two linear hole walls to move relative to each other in the circumferential direction, each pair of adjacent protrusions moves from one side of the other to the other side after passing through the other side, along with the linear hole wall they are on.

[0013] Preferably, the pipe wall of the section where the main elongated hole is located is a regular circular pipe wall; wherein:

[0014] On the outer side of the main long hole, a row of secondary long holes is arranged at axial intervals on the pipe wall. The secondary long holes are arranged at circumferential positions corresponding to the second section and extend at both ends to circumferential positions corresponding to the middle of the first section.

[0015] Preferably, the pipe wall is provided with a plurality of radially concave V-shaped recesses, the plurality of V-shaped recesses being arranged circumferentially, and each V-shaped recess having two sidewalls; wherein:

[0016] Each of the V-shaped concave portions has a row of main elongated holes on its two sidewalls. The second section between the two rows of main elongated holes on the two sidewalls of the V-shaped concave portion is a movable section, and the second section between two adjacent V-shapes is a fixed section. The driving component is used to drive the movable section to move axially.

[0017] Preferably, the driving component includes:

[0018] A positioning box, which is fixed to the outer end of the catheter body and located outside the cranium;

[0019] A miniature motor, which is mounted on the positioning box;

[0020] A turntable, which is mounted in a positioning box and driven by the micro motor to rotate around the central axis of the catheter body;

[0021] The driving rods include multiple rods arranged circumferentially along the central axis of the catheter body. The lower portions of the multiple driving rods respectively axially penetrate multiple second sections of the tube wall and are fixed to the tube wall. The upper ends of the multiple driving rods extend beyond the outer end of the catheter body and extend to the edge of the bottom surface of the turntable; wherein:

[0022] The bottom surface of the turntable is configured with circumferentially arranged and alternately arranged crests and troughs. Thus, when the micro motor drives the turntable to rotate, the crests and troughs of the turntable alternately pass over the upper end of the drive rod to drive the drive rod to move axially, thereby driving the second section to move axially.

[0023] Preferably, each of the drive rods has a driven head at its upper end, and a miniature spring is installed between each driven head and the outer end face of the conduit body. The miniature spring is used to apply a spring force to the drive rod in the direction of the turntable.

[0024] Preferably, a support core rod is inserted into the pipe wall of each of the fixed sections.

[0025] Preferably, the catheter body includes a lower main body segment and an upper support segment; the main body segment and the support segment are connected; wherein:

[0026] The main elongated hole is disposed on the tube wall of the main body section; the main body section is made of silicone or rubber material.

[0027] Preferably, the V-shaped concave portion shown is obtained by a thermoplastic molding process.

[0028] Preferably, a sealing cap is installed at the upper end of the catheter body, and the upper end of the drive rod passes through the sealing cap.

[0029] Preferably, a retaining sleeve is fitted on the outer side of the outer end of the catheter body, an annular bone plate is installed at the bottom of the retaining sleeve, and the positioning box is installed on the top of the retaining sleeve.

[0030] The present invention also discloses a drainage system, including a drainage tube, a flow control valve disposed on the drainage tube, and the aforementioned cerebrospinal fluid drainage catheter component implanted through the skull into the ventricle.

[0031] Compared with the prior art, the beneficial effects of the cerebrospinal fluid drainage catheter component and drainage system disclosed in this invention are:

[0032] 1. This invention provides a perforated catheter body with multiple rows of elongated holes on the tube wall, each containing numerous micropores defined by protrusions. By driving the axial movement of the tube wall between each pair of adjacent rows of elongated holes, the opposing linear holes in each row of elongated holes are displaced, thereby disturbing the internal space of the elongated holes and suppressing micropore blockage. This avoids brain tissue damage that may be caused by using ultrasonic vibration to suppress micropore blockage. Furthermore, compared to catheter components with a disturbance rod attached to a brush, the catheter component provided by this invention has less resistance to cerebrospinal fluid.

[0033] 2. The present invention, by configuring multiple V-shaped concave portions arranged circumferentially on the wall of the catheter body, can increase the amount of misalignment of the two linear hole walls of each row of elongated holes, thereby increasing the disturbance effect of the protrusion on the internal space of the elongated holes, and thus improving the suppression effect on micropores.

[0034] 3. The drive rod used to drive the axial movement of the tube wall is inserted into the tube wall rather than located in the lumen of the catheter, thereby further reducing the resistance to the cerebrospinal fluid.

[0035] 4. Other advantages of the present invention are described directly or implicitly in the specific embodiments of the specification.

[0036] The overview of various implementations or examples of the technology described in this invention is not a complete disclosure of the full scope or all features of the disclosed technology. Attached Figure Description

[0037] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to explain embodiments of the invention. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0038] Figure 1 This is a usage status view of the drainage system provided for an embodiment of the present invention.

[0039] Figure 2 This is a three-dimensional structural diagram of a conduit component with a main body segment of the first structure provided for an embodiment of the present invention.

[0040] Figure 3 A front sectional view of a conduit component with a main body segment configured with a first structure, provided for an embodiment of the present invention.

[0041] Figure 4 This is a three-dimensional structural diagram of the turntable in the drive component.

[0042] Figure 5 This is a three-dimensional structural diagram of the driving component.

[0043] Figure 6 This is a three-dimensional structural diagram of the main segment of the second type of conduit component.

[0044] Figure 7 This is a top view of the main body segment of the second type of conduit component.

[0045] Figure 8 This is a schematic diagram of the main body segment of the conduit assembly in its unfolded state.

[0046] Figure label:

[0047] 10-Catheter body; 11-Main body segment; 111-Lumen; 12-Supporting segment; 13-First section; 14-Second section; 141-Fixed section; 1411-Supporting core rod; 142-Moving section; 15-Main elongated orifice; 151-Linear orifice wall; 152-Protrusion; 153-Micropore; 16-V-shaped concave portion; 161-Silicone diaphragm; 17-Secondary elongated orifice; 18-Discharge port; 19-Sealing cap; 20-Driving component; 21-Driving rod; 211-Driven head; 212-Miniature spring; 22-Turntable; 221-Crest portion; 222-Trough portion; 23-Miniature motor; 24-Positioning box; 30-Base; 31-Retaining sleeve; 32-Annular bone plate.

[0048] 100 - Catheter assembly; 200 - Drainage tubing; 300 - Flow control valve. Detailed Implementation

[0049] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0051] like Figure 1As shown, the present invention discloses a catheter component 100 for draining cerebrospinal fluid from the ventricles and a drainage system including the catheter component 100. The drainage system further includes a drainage tube 200 and a flow control valve 300 installed on the drainage tube 200. The drainage catheter is generally cylindrical in shape and has an axial outer end and an inner end. When the drainage catheter is implanted, the inner end of the drainage catheter extends into the ventricle through a bone window pre-drilled in the skull, and the outer end of the drainage catheter is located outside the skull. The proximal end of the drainage tube 200 is connected to the outlet port 18 of the outer end of the drainage tube, and the distal end of the drainage tube 200 extends into the patient's body cavity (e.g., abdominal cavity, thoracic cavity). The cerebrospinal fluid in the ventricles flows sequentially through the catheter component 100 and the drainage tube 200 and is delivered into the patient's body cavity. The flow control valve 300 is used to control the flow rate of cerebrospinal fluid drainage to limit excessive cerebrospinal fluid from being drained from the ventricles.

[0052] like Figure 2 , Figure 3 and Figure 6 As shown, the drainage catheter includes: a catheter body 10, an end tip, a base 30, and a drive component 20. The catheter body 10 includes a tube wall and a lumen 111 enclosed by the tube wall. The end tip has a spherical surface and is attached to the inner end of the catheter body 10 to seal the inner end of the lumen 111. The spherical surface of the end tip can reduce damage to brain tissue during the insertion of the inner end of the drainage catheter into the ventricle. The port at the outer end of the catheter body 10 is sealed by a sealing cap 19. An outlet port 18 is disposed on the tube wall near the outer end of the catheter body 10. The proximal end of the drainage tube 200 is connected to the outlet port 18. Cerebrospinal fluid in the ventricle enters the lumen 111 through micropores 153 disposed on the tube wall of the catheter body 10. Under the pressure of the ventricle, the cerebrospinal fluid flows along the lumen 111 towards the outer end of the catheter body 10, and then flows into the drainage tube 200 through the outlet port 18. The base 30 includes a retaining sleeve 31 and an annular bone plate 32. The retaining sleeve 31 is fitted onto the outer wall of the catheter body 10 near the outer end and is attached and fixed to the wall. The fluid outlet 18 is led out from the wall of the retaining sleeve 31. The annular bone plate 32 is detachably attached to the inner end (or lower end) of the retaining sleeve 31. After the inner end of the catheter body 10 is inserted into the ventricle, the annular bone plate 32 is fixed to the skull by passing through the through hole on the edge of the bone screw through the bone screw, thereby achieving the positioning of the catheter body 10. The outer end of the retaining sleeve 31 has an attachment structure for the positioning component of the drive component 20 and the power source (such as the positioning box 24, micro motor 23, etc., which will be described below) to be detachably attached.

[0053] The axial section of the catheter body 10 requiring the configuration of micropores 153 (let's call it the main body section 11) is made of at least a flexible material with elastic deformation capabilities, such as silicone or rubber, which are biocompatible materials. Multiple rows of elongated holes (let's call these main elongated holes 15 for clarity, to avoid distinction from the elongated holes in another region described below) are machined into the wall of the main body section 11, arranged circumferentially along the wall. Each row of main elongated holes 15 includes numerous main elongated holes 15 spaced axially along the wall. Each main elongated hole 15 in each row extends circumferentially along the wall and is substantially the same length (circumferential extension refers to lateral extension along the wall, not strictly limited to arc extension), and each main elongated hole 15 penetrates the wall in thickness. The circumferential section of the main body segment 11 occupied by each column of main long holes 15 may be called the first section 13. Therefore, it can be said that each column of main long holes 15 is arranged in each first section 13. The circumferential section between two adjacent columns of main long holes 15 where no hole structure is arranged may be called the second section 14.

[0054] The main orifice 15 has two relatively flat linear orifice walls 151 that extend circumferentially. On each of the two linear orifice walls 151 of the main orifice 15, there are protrusions 152 arranged at intervals along their extension direction. Each protrusion 152 on the linear orifice wall 151 protrudes towards the opposite linear orifice wall 151 and is at a certain distance from the opposite linear orifice wall 151 without contacting or connecting with it. The protrusions 152 on the two opposing linear orifice walls 151 are arranged alternately. The protrusions 152 on the two opposing linear orifice walls 151 divide the internal slit-like space of the main orifice 15 into a plurality of micropores 153 for cerebrospinal fluid to pass through. In this way, the tube walls of each first section 13 of the main body section 11 are covered with a large number of micropores 153 for cerebrospinal fluid to pass through.

[0055] The driving component 20 is configured to drive the reciprocating axial movement of the second section 14 between the two rows of main elongated holes 15, specifically in such a way that one of the two adjacent second sections 14 moves axially relative to the other, that is, the second section 14 on one side of the circumferential direction of each row of main elongated holes 15 moves axially relative to the second section 14 on the other side of the circumferential direction. Figure 8As shown, the circumferential end of each main long hole 15 is axially displaced relative to the other end due to the relative axial movement of the second segment 14. Thus, similar to the movement of the two opposite long sides of a parallelogram caused by the relative movement of the two opposite short sides along their extension direction, the two opposite linear hole walls 151 undergo relative misalignment in the circumferential direction and relative movement towards or away from each other in the axial direction. The aforementioned relative movement characteristics of the two linear hole walls 151 cause the protrusion 152 to disturb the internal space of the main long hole 15 as it moves with its corresponding linear hole wall 151. The shape of the numerous micropores 153 defined by the protrusion 152 and the linear hole wall 151 also changes periodically with the relative movement and reset of the two linear hole walls 151, thereby helping to suppress the blockage of the micropores 153. For example, the protrusion 152 removes particles attached to the opposite linear pore wall 151 by moving with its corresponding linear pore relative to the opposite linear pore wall 151, thereby inhibiting the accumulation of particles on the linear pore wall 151; as another example, the relative movement of the two linear pore walls 151 causes relative movement between two adjacent protrusions 152 belonging to the two linear pores respectively, thereby changing the pore shape of the micropore 153 to release the particles trapped in the micropore 153; as yet another example, the two linear pore walls 151 approaching each other will flatten the particles located in the micropore 153, thereby increasing the flow cross section of the micropore 153 after the two linear pores return to their original positions.

[0056] In some preferred configurations of the catheter body 10, the protrusion 152 on the linear bore wall 151 of the main elongated orifice 15 is configured as a wing-like structure. This wing-like structure has a small thickness, making it easier for the protrusion 152 to elastically deform and return to its original position in the extending direction of the main elongated orifice 15. This also ensures that the protrusions 152 of the wing-like structures on the two opposite linear bore walls 151 of the main elongated orifice 15 are adjacent to each other. Thus, as... Figure 8 As shown, when one end of the main elongated hole 15 moves axially relative to the other end in the circumferential direction, causing the two linear hole walls 151 to move relative to each other in the circumferential direction, each pair of adjacent protrusions 152 moves from one side of the other to the other side of the other along with the movement of their respective linear hole walls 151. When the protrusions 152 pass by the protrusions 152 of the other side, the two protrusions 152 generate elastic deformation due to mutual contact to avoid each other. After the protrusions 152 pass by the protrusions 152 on the opposite side, the protrusions 152 elastically reset. Thus, during the process of the protrusions 152 moving from one side of the opposite side to the other side of the opposite side, the wing-shaped protrusions 152 will swing due to elastic deformation and elastic reset. This swing can, on the one hand, disturb the particles in the main elongated hole 15, and on the other hand, prevent them from adhering to the protrusions 152 and remove the particles that have already adhered to the protrusions 152.

[0057] The main body segment 11 of the aforementioned conduit component 100, as well as the main elongated hole 15, protrusion 152, and micropore 153 arranged in the first section 13 of the main body segment 11, can be obtained using the following manufacturing process: Figure 8 As shown, a silicone sheet (plate) of a certain length and width is cut as a blank. The main structure of the main body segment 11 is obtained by rolling the silicone sheet into a tubular structure. Before rolling, multiple rows of main elongated holes 15 and protrusions 152 on the two linear hole walls 151 of the main elongated holes 15 are engraved on the silicone sheet using engraving equipment (such as a laser engraving machine). After rolling, the main elongated holes 15 are obtained by circumferentially arranging multiple rows of micro-holes 153 separated by the protrusions 152.

[0058] In some preferred structures of the catheter body 10, such as Figure 2 and Figure 3 As shown, the catheter body 10 also has a rigid or semi-rigid support section 12, which is connected to the main body section 11. The support section 12 is located in the outer section of the catheter body 10. When the driving component 20 drives the second section 14 of the main body section 11 to move axially distally and when the second section 14 is reset, the wall of the support section 12 will not deform. The support section 12 is used to provide a certain support rigidity to the outer end of the catheter body 10 and to position and install the components at the outer end of the catheter body 10. The support section 12 can be injection molded from a biocompatible plastic material, and the support section 12 and the main body section 11 can be bonded together with an adhesive.

[0059] The present invention provides two specific structures for the main body segment 11 of the catheter body 10.

[0060] The first type of structure has a main body segment 11.

[0061] like Figure 2 and Figure 3As shown, the wall of the main body section 11 is a regular circular wall, without any radial concave or convex structures. Therefore, the wall of the main body section 11 is round in the circumferential direction. In this type of main body section 11, in addition to the main elongated holes 15 arranged axially at intervals in each of the first sections 13 arranged circumferentially, multiple rows of secondary elongated holes 17 are also arranged axially at intervals on the walls on both sides of the main elongated holes 15. The secondary elongated holes 17 also extend circumferentially. Each row of secondary elongated holes 17 is specifically located in the circumferential section where the second section 14 is located, and both ends of each row of secondary elongated holes 17 extend to the circumferential position corresponding to the middle of the first section 13. Since the central region of each row of secondary elongated holes 17 corresponds circumferentially to the second section 14 and is located on both sides of the second section 14 in the axial direction, the pipe walls on both sides of the second section 14 are considered weak areas due to the numerous secondary elongated holes 17. Thus, when the second section 14 is driven to move axially, the pipe walls containing the secondary elongated holes 17 can adapt to the axial movement of the second section 14, reducing the axial tension on the pipe walls on both sides of the second section 14 during axial movement. This increases the allowable axial movement stroke of the second section 14 and suppresses the overall deformation of the main section 11 caused by the axial movement of the second section 14. The axial tension on the pipe walls on both sides of the second section 14 during axial movement is reduced by maximizing the number of spaced secondary elongated holes 17 and minimizing the axial wall thickness between each pair of adjacent secondary elongated holes 17. The interior of the secondary long hole 17 is also configured with a structure similar to that of the main long hole 15. That is, protrusions 152 arranged at intervals are also configured on the two opposite linear hole walls 151 of the secondary long hole 17 to define a number of micropores 153 in the secondary long hole 17, thereby preventing large particles and slender objects in the cerebrospinal fluid from entering the lumen 111 of the catheter body 10 through the secondary long hole 17.

[0062] The second type of structure has a main body segment 11.

[0063] like Figure 6 and Figure 7As shown, the main body section 11 has an irregular circular wall. Multiple radially inwardly protruding and circumferentially arranged V-shaped recesses 16 are configured on the wall of the main body section 11. Each V-shaped recess 16 has two sidewalls, and a row of main elongated holes 15 is configured on each of the two sidewalls of each V-shaped recess 16. The second section 14 between the two rows of main elongated holes 15 on the two sidewalls of the V-shaped recess 16 is a movable section 142, and the second section 14 between two adjacent V-shapes is a fixed section 141. The driving component 20 is used to drive the movable section 142 to move axially. Silicone membranes 161 are covered at the V-shaped grooves formed by the V-shaped recesses 16 at both ends of the main body section 11 in the axial direction to prevent cerebrospinal fluid and its mixed particles from entering the lumen 111 of the catheter body 10 through the V-shaped grooves. In this structure, the V-shaped recess 16 corresponds to an arm extending into the lumen 111 of the main tube. The movable section 142, located at the apex of the intersection of the two sidewalls, corresponds to the free end of the arm. Therefore, the movable section 142 is radially offset from the fixed section 141 and is not located on the same circumference as the fixed section 141. Thus, the movable section 142 has a larger permissible axial movement stroke, and its axial movement is less restricted and restrained by the fixed section 141. Because the movable section 142 has a larger axial movement, the relative misalignment of the two opposing linear hole walls 151 of each row of main elongated holes 15 on the sidewall is greater, thereby increasing the disturbance effect of the protrusion 152 on the main elongated holes 15 and making the suppression of micropore blockage 153 more significant. In addition, by configuring the V-shaped concave portion 16, the main body section 11 can obtain a larger tube wall expansion area, thereby making the total flow cross section of all micropores 153 larger.

[0064] The aforementioned main body segment 11 can be formed by using a mold to create multiple V-shaped recesses 16 arranged circumferentially on a regular circular tube wall through a thermoplastic molding process.

[0065] A support core rod 1411 is embedded in the pipe wall of each fixed section 141. The two ends of the support core rod 1411 extend out of the axial direction of the main section and are respectively inserted into the inner end and the outer end of the support section 12. The support core rod 1411 is used to improve the rigidity of the fixed section 141 to suppress the deformation and movement of the fixed section 141 caused by the axial movement of the movable section 142.

[0066] The driving component 20 is used to drive the second section 14 of the main body section 11 to move axially. For the main body section 11 of the first structure, the driving component 20 is used to drive each second section 14 to move axially. For the main body section 11 of the second structure, the driving component 20 is used to drive each active section 142 in the second section 14 to move axially.

[0067] like Figure 4 , Figure 5 and combined Figure 3 As shown, the drive component 20 includes: a positioning box 24, a power source, a turntable 22, and multiple drive rods 21.

[0068] The support section 12 of the conduit body 10 has multiple axially extending and penetrating guide holes on its wall. These guide holes are circumferentially opposite to the second section 14. Multiple drive rods 21 are circumferentially arranged and pass through the guide holes on the support section 12 of the conduit body 10 and are inserted into the second section 14 (for the main body section 11 of the second structure, the drive rods 21 are inserted into the movable section 142). Preferably, the drive rods 21 penetrate the second section 14 axially to increase the rigidity of the second section 14 and restrict the axial movement of the drive rods 21 relative to the second section 14, thereby allowing the second section 14 to move synchronously with the corresponding drive rod 21. For the main body section 11 of the second structure, the drive rods 21 form a bend (not shown) in the junction area between the main body section 11 and the support section 12, thus conforming to the structural characteristic of radial misalignment between the movable section 142 and the support section 12.

[0069] The positioning box 24 is detachably mounted to the outer end of the catheter body 10. Specifically, the positioning box 24 is detachably mounted to the outer end of the catheter body 10 by screwing it onto the upper end of the retaining sleeve 31. The positioning box 24 has an installation interface facing outwards, separated by a partition plate, and a receiving groove for a sealing cap 19 at the port facing outwards of the catheter body 10. The power source includes at least a micro motor 23, which is attached to the installation interface. The output shaft of the micro motor 23 passes through the partition plate and extends into the receiving groove. A turntable 22 is located in the receiving groove and mounted on the output shaft of the micro motor 23 extending into the receiving groove, so that the micro motor 23 can drive the turntable 22 to rotate about the central axis of the catheter body 10. Preferably, the power source also includes a battery module with a charging interface, which is attached to the micro motor 23 to continuously provide power to the micro motor 23.

[0070] On the bottom surface of the turntable 22 facing the upper end of the drive rod 21, alternating circumferentially arranged crests 221 and troughs 222 are arranged, such that the total number of troughs 222 and troughs 222 is the same as the total number of drive rods 21, and the circumferential arrangement angle is the same; and when the second section 14 is in a free state without axial drive, the height of the upper end of the drive rod 21 corresponding to the second section 14 is basically flush with the troughs 222 of the turntable 22. Thus, when the turntable 22 is driven to rotate by the micro motor 23, the crests 221 and troughs 222 on the bottom surface of the turntable 22 alternately pass over the upper end of each drive rod 21. For each drive rod 21, when the crest 221 passes over the drive rod 21 as the turntable 22 rotates, the drive rod 21 is driven by sliding up the crest 221 to drive the second section 14 to move axially toward the inner end of the guide tube body 10. The drive rod 21 corresponding to the second section 14 adjacent to the second section 14 slides into the trough 222 due to the elastic reset effect. Therefore, during the rotation of the turntable 22, the second section 14 makes reciprocating axial movements, thereby causing the two opposing linear hole walls 151 of each row of main elongated holes 15 to produce reciprocating misalignment movements. The main body segment 11 of the first structure and the main body segment 11 of the second structure differ in the movement of the two ends of the main elongated hole 15 as follows: Because only the movable segment 142 in the second section 14 of the main body segment 11 of the second structure produces axial movement, the main elongated hole 15 on the main body segment 11 of the second structure only produces axial movement at one end of the movable segment 142 and does not produce axial movement at the end of the fixed segment 141; while because each second section 14 of the main body segment 11 of the first structure produces axial movement, the two ends of the main elongated hole 15 on the main body segment 11 of the second structure alternately produce axial movement according to the segment they belong to.

[0071] In some preferred configurations of the drive component 20, a driven head 211 is attached to the upper end of each drive rod 21, for example, the driven head 211 is detachably attached by thread engagement, the end having a spherical top surface for contacting the bottom surface of the drive disc, thereby facilitating smooth switching of the upper end of the drive rod 21 between the crest 221 and the trough 222.

[0072] In some more preferred configurations of the drive component 20, a miniature spring 212 is provided between the driven head 211 of each drive rod 21 and the sealing cap 19 at the outer port of the catheter body 10. When the peak 221 of the turntable 22 passes the drive rod 21 and drives it to move axially toward the inner end of the catheter body 10, the miniature spring 212 is compressed. When the trough 222 of the turntable 22 passes the drive rod 21, the miniature spring 212 is reset, thus assisting the drive rod 21 in resetting. The function of the miniature spring 212 is to assist the second section 14 in resetting by applying a spring force toward the upper end of the catheter body 10 to the drive rod 21, thereby avoiding the inability to automatically reset due to insufficient elastic reset capability of the second section 14.

[0073] Furthermore, although exemplary embodiments have been described in this invention, their scope includes any and all embodiments based on the invention that have equivalent elements, modifications, omissions, combinations (e.g., schemes involving intersections of various embodiments), adaptations, or alterations. Elements in the claims will be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the implementation of this application, and such examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered illustrative only, and the true scope and spirit are indicated by the full scope of the following claims and their equivalents.

[0074] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. Other embodiments may be used by those skilled in the art upon reading the above description. Furthermore, in the above detailed description, various features may be grouped together to simplify the invention. This should not be construed as an intention that a disclosed feature, which is not claimed, is necessary for any claim. Rather, the subject matter of the invention may be less than all the features of the particular disclosed embodiment. Thus, the following claims are incorporated herein by reference as examples or embodiments, wherein each claim is independently considered as a separate embodiment, and these embodiments are contemplated as being possible in various combinations or arrangements. The scope of the invention should be determined by reference to the appended claims and the full scope of their equivalents.

[0075] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A cerebrospinal fluid drainage catheter component, characterized in that, include: The catheter body has a tube wall and a lumen enclosed by the tube wall. The tube wall has multiple rows of main elongated holes that extend circumferentially and are spaced apart axially. The multiple rows of main elongated holes are arranged circumferentially. On the two opposite linear holes of each main elongated hole, multiple protrusions are arranged spaced apart along the extension direction of the main elongated hole to divide the main elongated hole into multiple micropores. The circumferential section of the tube wall occupied by each row of main elongated holes is a first section, and the circumferential section of the tube wall between each two adjacent rows of main elongated holes is a second section. A driving component is used to drive one of the two adjacent second segments to move axially relative to the other second segment so that one end of the main elongated hole moves axially relative to the other end in the circumferential direction, thereby causing the two linear hole walls of the main elongated hole to move relative to each other in the circumferential direction, thereby causing the protrusion to disturb the interior of the main elongated hole. The catheter body includes a lower main body segment and an upper support segment; the main body segment and the support segment are connected; wherein: The main elongated hole is disposed on the tube wall of the main body section; the main body section is made of silicone or rubber material.

2. The cerebrospinal fluid drainage catheter component according to claim 1, characterized in that, The protrusion is configured as a wing-like structure extending from the linear hole wall; wherein: This causes the protrusions on the two opposing linear hole walls of the main elongated hole to be close together. Thus, when one end of the main elongated hole is driven to move axially relative to the other end in the circumferential direction, causing the two linear hole walls to move relative to each other in the circumferential direction, each pair of adjacent protrusions moves from one side of the other to the other side after passing through the other side, along with the linear hole wall they are on.

3. The cerebrospinal fluid drainage catheter component according to claim 1, characterized in that, The pipe wall of the section where the main elongated hole is located is a regular circular pipe wall; wherein: On the outer side of the main long hole, a row of secondary long holes is arranged at axial intervals on the pipe wall. The secondary long holes are arranged at circumferential positions corresponding to the second section and extend at both ends to circumferential positions corresponding to the middle of the first section.

4. The cerebrospinal fluid drainage catheter component according to claim 1, characterized in that, The pipe wall is provided with a plurality of radially concave V-shaped recesses, which are arranged circumferentially, and each V-shaped recess has two sidewalls; wherein: Each of the V-shaped recesses has a row of main elongated holes on its two sidewalls. The second section between the two rows of main elongated holes on the two sidewalls of the V-shaped recess is a movable section, and the second section between two adjacent V-shapes is a fixed section. The driving component is used to drive the movable section to move axially.

5. The cerebrospinal fluid drainage catheter component according to claim 1, characterized in that, The driving component includes: A positioning box, which is fixed to the outer end of the catheter body and located outside the cranium; A miniature motor, which is mounted on the positioning box; A turntable, which is mounted in a positioning box and driven by the micro motor to rotate around the central axis of the catheter body; The driving rods include multiple rods arranged circumferentially along the central axis of the catheter body. The lower portions of the multiple driving rods respectively axially penetrate multiple second sections of the tube wall and are fixed to the tube wall. The upper ends of the multiple driving rods extend beyond the outer end of the catheter body and extend to the edge of the bottom surface of the turntable; wherein: The bottom surface of the turntable is configured with circumferentially arranged and alternately arranged crests and troughs. Thus, when the micro motor drives the turntable to rotate, the crests and troughs of the turntable alternately pass over the upper end of the drive rod to drive the drive rod to move axially, thereby driving the second section to move axially.

6. The cerebrospinal fluid drainage catheter component according to claim 5, characterized in that, Each of the drive rods has a driven head at its upper end, and a miniature spring is installed between each driven head and the outer end face of the conduit body. The miniature spring is used to apply a spring force to the drive rod in the direction of the turntable.

7. The cerebrospinal fluid drainage catheter component according to claim 4, characterized in that, Each of the fixed sections has a support core rod inserted into its pipe wall.

8. The cerebrospinal fluid drainage catheter component according to claim 4, characterized in that, The V-shaped concave portion shown is obtained by thermoplastic molding.

9. The cerebrospinal fluid drainage catheter component according to claim 5, characterized in that, A sealing cap is installed at the upper end of the catheter body, and the upper end of the drive rod passes through the sealing cap.

10. The cerebrospinal fluid drainage catheter component according to claim 5, characterized in that, A retaining sleeve is fitted on the outer side of the outer end of the catheter body, an annular bone plate is installed at the bottom of the retaining sleeve, and the positioning box is installed on the top of the retaining sleeve.

11. A drainage system, comprising a drainage hose and a flow control valve disposed on the drainage hose, characterized in that, It also includes a cerebrospinal fluid drainage catheter component as described in any one of claims 1 to 10, which is implanted through the skull into the ventricle.

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