CN117339032A

CN117339032A - Micropore hydrocephalus drainage device

Info

Publication number: CN117339032A
Application number: CN202311294375.9A
Authority: CN
Inventors: 周威; 龙俊; 张志军
Original assignee: Guangdong Bomai Yuantong Medical Technology Co ltd
Current assignee: Guangdong Bomai Yuantong Medical Technology Co ltd
Priority date: 2023-10-08
Filing date: 2023-10-08
Publication date: 2024-01-05

Abstract

The invention discloses a microporous hydrocephalus drainage device, one end of a tube body is communicated with a small brain bridge cerebral angle pond, the other end of the tube body is communicated with a jugular vein, hydrocephalus in the small brain bridge cerebral angle pond is conveyed to the jugular vein through the tube body, a microporous structure is arranged on the side wall of the other end of the tube body, namely the side wall of the end communicated with the jugular vein, hydrocephalus flows into the jugular vein from the microporous structure through the inner cavity of the tube body, and the relationship between the Kong Dangliang hydraulic diameter of the microporous structure and the absolute pressure of liquid in the small brain bridge cerebral angle pond is thatWherein P is the absolute pressure of liquid in the brain angle pool of the working small brain bridge, delta is the surface tension systemThe number, D, is the pore equivalent hydraulic diameter and β is the contact angle of the liquid on the walls of the microporous structure. The microporous hydrocephalus drainage device can prevent excessive drainage and reduce risks of cerebral ventricular collapse, subdural hematoma and the like of patients.

Description

Micropore hydrocephalus drainage device

Technical Field

The invention relates to the technical field of medical appliances, in particular to a microporous hydrocephalus drainage device.

Background

Cerebrospinal fluid (Cerebrospinal Fluid, CSF for short) is mainly produced by the ventricular system and by cerebrospinal fluid in the subarachnoid space. The abnormal accumulation of CSF in the ventricular system is known as hydrocephalus. Not timely treated, hydrocephalus may cause increased intracranial pressure, thereby causing damage to brain tissue.

Ventricular and abdominal bypass is used in surgery to solve the hydrocephalus problem by placing a VP shunt, attaching a ventricular catheter to the inflow portion of the valve mechanism, and implanting the inflow portion under the scalp of the patient. The outflow portion of the valve mechanism is attached to the silicon catheter, which opens up a channel under the patient's skin down through the neck and into the abdomen. The implanted shunt provides a one-way flow path for CSF to pass from the ventricle of the patient into the peritoneal cavity.

Traditional ventricular peritoneal shunts (VP shunts) are prone to blockage, especially in the ventricular catheter and peritoneal tube. When excess CSF is removed from the ventricle through the catheter, the ventricle contracts, the choroid and other cells of the surrounding ventricle shrink around the CSF inlet of the catheter, and flow of CSF into the VP shunt is prevented. VP shunt placement surgery has a relatively high infection rate, and due to the formation of long hydrostatic columns between the CSF inflow (i.e., ventricle) and outflow (i.e., peritoneum) locations of the implanted shunt, VP shunts are subject to siphoning effects, draining CSF too quickly from the ventricle or draining too much CSF, can cause the patient to develop, for example, ventricular collapse or subdural hematoma, thereby posing significant risk to the patient.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the VP shunt in the prior art is easy to have a siphon effect, so that the CSF of the ventricle is drained too quickly or too much, and the microporous hydrocephalus drainage device is provided.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a microporous hydrocephalus drainage device comprising: one end of the tube body is suitable for being communicated with the cerebellar angle pool, and the side wall of the other end of the tube body is provided withThe cerebral infarction treatment device is provided with a plurality of micropore structures, wherein the micropore structures are suitable for being communicated with jugular veins so as to be suitable for draining cerebral water in the cerebellum bridge brain angle pond into the jugular veins, and the Kong Dangliang hydraulic diameter of the micropore structures is related to the absolute pressure of liquid in the cerebellum bridge brain angle pond:

wherein P is the absolute pressure of the liquid in the cerebellum bridge brain angle cell, delta is the surface tension coefficient, D is the pore equivalent hydraulic diameter, and beta is the contact angle of the liquid on the wall surface of the micropore structure.

According to some embodiments of the invention, the microporous structure is arranged on the lower half side wall of the other end of the pipe body, and the microporous structure is uniformly distributed or randomly distributed on the lower half side wall of the pipe body.

According to some embodiments of the invention, the microporous structure is circular, square or triangular in cross-section.

According to some embodiments of the invention, one end of the tube is provided with a dilation anchor that is snapped into engagement with the arachnoid layer such that the one end of the tube communicates with the cerebellar angle pool.

According to some embodiments of the invention, the expansion anchor structure is in a circular tube shape, the expansion anchor structure is sleeved on the periphery of one end of the tube body, and the expansion anchor structure is made of self-expanding hydrogel material.

According to some embodiments of the invention, the expansion anchor structure includes a mounting portion that is sleeved on an outer periphery of one end of the tube body, and an anchor portion made of an elastic material, the anchor portion having a delivery state when contracted and an anchor state when expanded.

According to some embodiments of the invention, the expansion anchor structure is a sheet structure made of a polymeric material, the outer side of the sheet structure is provided with a hydrophilic coating, and the inner side of the sheet is provided with a hydrophobic coating.

According to some embodiments of the invention, one end of the tube body is provided with a positioning structure, the positioning structure is annular and sleeved at one end of the tube body, and the positioning structure is made of a metal material which is impermeable to X rays.

According to some embodiments of the invention, the tube body is at least three-layer structure, the inner layer structure of the tube body is made of a low friction coefficient material, the outer layer structure of the tube body is made of a high polymer material, and the middle layer structure of the tube body is made of a metal and/or alloy material.

According to some embodiments of the invention, the middle layer of the tube body is in a spring-like structure or the expansion plane of the middle layer is in a woven net-like structure.

The technical scheme of the invention has the following advantages:

1. the invention provides a microporous hydrocephalus drainage device, one end of a tube body is communicated with a small brain bridge brain angle pond, the other end of the tube body is communicated with a jugular vein, hydrocephalus in the small brain bridge brain angle pond is conveyed to the jugular vein through the tube body, a microporous structure is arranged on the side wall of the other end of the tube body, namely the side wall of the end communicated with the jugular vein, hydrocephalus flows into the jugular vein from the microporous structure through the inner cavity of the tube body, and the relationship between the Kong Dangliang hydraulic diameter of the microporous structure and the absolute pressure of liquid in the small brain bridge brain angle pond is thatWherein P is the absolute pressure of liquid in the brain angle cell of the working small brain bridge, delta is the surface tension coefficient, D is the pore equivalent hydraulic diameter, and beta is the contact angle of liquid on the wall surface of the micropore structure. The microporous hydrocephalus drainage device can prevent excessive drainage and reduce risks of cerebral ventricular collapse, subdural hematoma and the like of patients.

2. According to the microporous hydrocephalus drainage device provided by the invention, the microporous structure is arranged on the lower half side wall of the other end of the tube body, the microporous structure is in linear distribution, and the openings of the microporous structure are downwards arranged, so that the pressure of blood in the jugular vein on the surface of the microporous structure is avoided, the backflow of hydrocephalus is avoided, and hydrocephalus can smoothly flow into the jugular vein.

3. According to the microporous hydrocephalus drainage device provided by the invention, the expansion anchoring structure is arranged at one end of the tube body, and the anchoring structure is clamped with the arachnoid layer after being conveyed to the cerebellar horn pool, so that one end of the tube body is communicated with the cerebellar horn pool, the movement of the tube body is avoided by the expansion anchoring structure, and the hydrocephalus conveying stability is ensured.

4. The microporous hydrocephalus drainage device provided by the invention is characterized in that one end of the tube body is sleeved with the positioning structure, the positioning structure is used for positioning the tube body in operation, and the positioning structure is positioned below the expansion anchoring structure so as to ensure that the expansion anchoring structure is clamped with the arachnoid layer, thereby ensuring that one end of the tube body is communicated with the small brain bridge cerebral angle pool.

5. The microporous hydrocephalus drainage device provided by the invention has the advantages that the tube body is of a multilayer structure, and the tube body is of a spring-shaped structure or a braided net-shaped structure on the unfolded plane of the tube body, so that the tube wall strength of the tube body is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of an implantable intracorporeal deployment of a microporous hydrocephalus drainage device provided in some embodiments of the present invention;

FIG. 2 is a schematic structural view of a microporous hydrocephalus drainage device provided in some embodiments of the present invention;

FIG. 3 is a schematic illustration of hydrocephalus drainage principles provided in some embodiments of the invention;

FIG. 4 is a schematic illustration of the structure of the expanded anchoring structure provided in the first embodiment of the present invention;

FIG. 5 is a schematic illustration of the structure of an expanded anchoring structure provided in a second embodiment of the present invention;

FIG. 6 is a schematic view of an expanded anchoring structure provided in a third embodiment of the present invention in a contracted state;

FIG. 7 is a schematic view of an expanded anchoring structure provided in a third embodiment of the present invention in an expanded state;

FIG. 8 is a cross-sectional view of a tube provided in some embodiments of the invention;

FIG. 9 is a schematic representation of a woven lay-out plane of an intermediate layer structure of a tubular body provided in some embodiments of the invention;

fig. 10 is a schematic view of an intermediate layer of a pipe body according to some embodiments of the present invention.

Reference numerals illustrate: 1. a tube body; 2. expanding the anchoring structure; 3. a positioning structure; 4. cerebellum bridge brain angle pool; 5. jugular vein; 6. a arachnoid layer; 11. a microporous structure; 12. an outer layer structure; 13. an inner layer structure; 14. an intermediate layer structure; 21. a mounting part; 22. an anchor portion.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1-3, a microporous hydrocephalus drainage device comprising: the cerebral infarction tube comprises a tube body 1, one end of the tube body 1 is suitable for being communicated with a small brain bridge brain angle pond 4, a plurality of microporous structures 11 are arranged on the side wall of the other end of the tube body 1, the microporous structures 11 are suitable for being communicated with a jugular vein 5 so as to be suitable for draining hydrocephalus of the small brain bridge brain angle pond 4 into the jugular vein 5, and the absolute pressure relation between the Kong Dangliang hydraulic diameter of the microporous structures 11 and liquid in the small brain bridge brain angle pond 4 is as follows:wherein P is the absolute pressure of the liquid in the cerebellum bridge brain angle cell 4, delta is the surface tension coefficient, D is the pore equivalent hydraulic diameter, and beta is the contact angle of the liquid on the wall surface of the micropore structure 11.

Specifically, one end of the tube body 1 is communicated with the cerebellum bridgehead angle pond 4, the other end is communicated with the jugular vein 5, hydrocephalus in the cerebellum bridgehead angle pond 4 is conveyed to the jugular vein 5 through the tube body 1, a microporous structure 11 is arranged on the side wall of the other end of the tube body 1, namely the side wall of the end communicated with the jugular vein 5, hydrocephalus flows into the jugular vein 5 from the microporous structure 11 through the inner cavity of the tube body 1, and the relationship between the Kong Dangliang hydraulic diameter of the microporous structure 11 and the absolute pressure of liquid in the cerebellum bridgehead angle pond 4 is thatWherein P is the absolute pressure of liquid in the working cerebellum bridge brain angle cell 4, delta is the surface tension coefficient, D is the pore equivalent hydraulic diameter, beta is the liquid on the wall surface of the microporous structure 11Is a contact angle of (c).

It will be appreciated that: in individuals without hydrocephalus, intracranial pressure (ICP) can range from 6cm H2O to 20cm H2O. Atmospheric hydrocephalus (NPH) is a form of traffic hydrocephalus: NPH patients may exhibit little or no increase in ICP, but ICP in NPH patients may range from 6cmH2O to 27cmH 2O. While venous blood pressure in the intracranial venous sinus, jugular vein and jugular vein 5 is typically between 4cmH2O and 11cmH2O, hydrocephalus is drained through the micropores under normal pressure differential conditions between the cerebellar-bridge horn pool 4 and the venous system. Specifically:

the surface tension of the liquid is as follows: fδ=δpi D;

the components of the liquid surface tension in the Y direction are: fy=fδcos α=fδcos (pi- β) = - δpi Dcos β;

referring to fig. 3, LD is shown as liquid and GS is shown as others; WB is denoted as microporous structure 11 wall. If the absolute pressure of the fluid (LD) in the cerebellar abutment pit 4 is P, the force generated by the fluid pressure at the inlet of the microporous structure 11 in the axial direction of the microporous structure 11 can be expressed as:

when the pressure of the fluid in the cerebellar abutment pit 4 is greater than the component of the surface tension of the fluid in the Y direction, i.e. F, at the inlet of the microporous structure 11, the stress in the axial direction of the microporous structure 11 is generated _f ＞F _y When in use; through this microporous structure 11, the liquid is not effectively intercepted against the action of surface tension, and the hydrocephalus is drained into the jugular vein 5 through the microporous structure 11.

The force in the axial direction of the microporous structure 11 generated at the inlet of the microporous structure 11 from the component fy=fδcos α=fδcos (pi- β) = - δpi Dcos β of the liquid surface tension in the Y direction can be expressed as:tidying up available->

Thus, when the inner diameter D and the surface tension coefficient δ of the microporous structure 11 and the contact angle β with the liquid in the cerebellar level 4 conform to the above formula, CSF can be drained into the jugular vein 5 through the microporous structure 11. The microporous hydrocephalus drainage device can prevent excessive drainage and reduce risks of cerebral ventricular collapse, subdural hematoma and the like of patients.

Referring to fig. 2, in some embodiments of the present invention, the microporous structure 11 is disposed on the lower half sidewall of the other end of the tube body 1, and the microporous structure 11 may be uniformly distributed or randomly distributed on the lower half sidewall of the tube body 1.

In some embodiments of the present invention, the microporous structure 11 is circular, square or triangular in cross-section.

Specifically, the microporous structure 11 is arranged on the lower half side wall of the other end of the tube body 1, the microporous structure 11 is in linear distribution, and the opening of the microporous structure 11 is arranged downwards, so that the application of pressure on the surface of the microporous structure 11 by blood in the jugular vein 5 is avoided, the backflow of hydrocephalus is avoided, and hydrocephalus can smoothly flow into the jugular vein 5.

It will be appreciated that the microporous structure 11 may be uniformly or randomly distributed on the lower half side wall of the tube body 1. In some embodiments of the present invention, the microporous structure 11 is in the form of a honeycomb briquette. The cross-sectional shape of the microporous structure 11 is not limiting to the present invention, D being the diameter of the microporous structure 11 when the microporous structure 11 is a circular hole, and D being the equivalent hydraulic diameter of the microporous structure 11 when the microporous structure 11 is a square, triangular or other non-circular hole.

Referring to fig. 1 and 2, in some embodiments of the invention, one end of the tube 1 is provided with a expansion anchor 2, the expansion anchor 2 being snapped into engagement with the arachnoid layer 6 so that one end of the tube 1 communicates with the pontic angle reservoir 4.

Specifically, an expansion anchoring structure 2 is arranged at one end of the tube body 1 and is clamped with the arachnoid layer 6 after being conveyed to the cerebellar angle pool 4, so that one end of the tube body 1 is communicated with the cerebellar angle pool 4, and the expansion anchoring structure 2 prevents the movement of the tube body 1, so that the hydrocephalus conveying stability is ensured.

Referring to fig. 4, in the first embodiment of the present invention, the expansion anchor 2 is in a circular tube shape, the expansion anchor 2 is sleeved on the outer circumference of one end of the tube body 1, and the expansion anchor 2 is made of self-expanding hydrogel material.

Specifically, the microporous hydrocephalus drainage device is conveyed into the head through the conveying device, one end of the tube body 1 is communicated with the cerebellum bridge brain angle pond 4, the other end of the tube body 1 is communicated with the jugular vein 5, the expansion anchoring structure 2 is arranged at one end of the tube body 1 communicated with the cerebellum bridge brain angle pond 4, the expansion anchoring structure 2 is in a circular shaft shape and is sleeved on the periphery of the tube body 1, the expansion anchoring structure 2 is made of a self-expanding hydrogel material, after one end of the tube body 1 enters the cerebellum bridge brain angle pond 4, the expansion anchoring structure 2 absorbs hydrocephalus to perform self-expansion, so that the expansion anchoring structure 2 is clamped with the upper surface of the arachnoid layer 6, and one end of the tube body 1 is fixed in the cerebellum bridge brain angle pond 4, so that stable drainage of hydrocephalus is realized.

Referring to fig. 5, in the second embodiment of the present invention, the expansion anchor structure 2 includes a mounting portion 21 and an anchor portion 22, the mounting portion 21 is fitted around the outer periphery of one end of the tube body 1, the anchor portion 22 is made of an elastic material, and the anchor portion 22 has a delivery state when contracted and an anchor state when expanded.

Specifically, the expanding and anchoring structure 2 includes a mounting portion 21 and an anchoring portion 22 that are connected, the mounting portion 21 is in a tubular shape so as to be sleeved at one end of the tube body 1, the anchoring portion 22 is made of an elastic material, specifically, the anchoring portion 22 may be made of a material such as silica gel, polyurethane, nylon elastomer, etc., in the conveying device, the anchoring portion 22 is in a contracted conveying state, after the anchoring portion 22 is conveyed to the cerebellar angle pool 4, the conveying device is retracted, at this time, the anchoring portion 22 expands and expands to be in an anchoring state, and the outer surface of the anchoring portion 22 is clamped with the arachnoid layer 6.

It will be appreciated that the anchoring portion 22 is in the form of a folded sheet with the fold angle sloping downwardly towards the interior of the tubular body 1 to avoid backflow of hydrocephalus.

Referring to fig. 6 and 7, in a third embodiment of the present invention, the expansion anchor structure 2 is a sheet structure made of a high molecular material, the outer side of the sheet structure is provided with a hydrophilic coating, and the inner side of the sheet is provided with a hydrophobic coating.

Specifically, the sheet structure is connected with one end of the tube body 1, and is made of a polymer material, specifically, polytetrafluoroethylene (PTFE), block polyether amide resin (Pebax), high-pressure polyethylene (LDPE), and the like, a hydrophilic coating is disposed on an outer side surface of the sheet structure, and a hydrophobic coating is disposed on an inner side surface of the sheet, so that after the sheet structure enters the cerebellar angle cell 4, the sheet structure is in an expanded state in a hydrocephalus environment, and is clamped with the arachnoid layer 6.

Referring to fig. 1 and 2, in some embodiments of the present invention, one end of the tube body 1 is provided with a positioning structure 3, and the positioning structure 3 is annular and sleeved at one end of the tube body 1, and the positioning structure 3 is made of a metal material that is impermeable to X-rays.

Specifically, a positioning structure 3 is sleeved at one end of the tube body 1, and the positioning structure 3 is used for positioning the tube body 1 during operation. The positioning structure 3 is of a ring structure and is positioned below the expansion anchor structure 2 so as to ensure that the expansion anchor structure 2 is clamped with the arachnoid layer 6, thereby ensuring that one end of the tube body 1 is communicated with the cerebellar angle pool 4.

It will be appreciated that the positioning structure 3 may also be tubular, the shape of the positioning structure 3 not being limiting to the invention, the positioning structure 3 being made of a radio-opaque metallic material, in particular of a metallic material such as platinum, iridium, gold, tantalum, etc.

Referring to fig. 8, in some embodiments of the present invention, the pipe body 1 has at least a three-layer structure, the inner layer structure 13 of the pipe body 1 is made of a low friction coefficient material, the outer layer structure 12 of the pipe body 1 is made of a high polymer material, and the middle layer structure 14 of the pipe body 1 is made of a metal and/or alloy material.

Specifically, the pipe body 1 is configured as a multi-layer structure, and in some embodiments of the present invention, the inner layer structure 13 of the pipe body 1 is made of a material with a low friction coefficient, specifically, a material such as Polytetrafluoroethylene (PTFE) or High Density Polyethylene (HDPE); the outer layer material of the pipe body 1 is made of a high polymer material, and can be specifically made of Polytetrafluoroethylene (PTFE), block polyether amide resin (Pebax), nylon, polyurethane and other high polymer materials; the middle layer of the pipe body 1 is made of a metal material and/or an alloy material, and can be a stainless steel material or a nickel and titanium material.

Referring to fig. 9 and 10, in some embodiments of the present invention, the intermediate layer of the tube body 1 is in a spring-like structure or its developed plane is in a woven mesh structure.

Specifically, the tube body 1 is in a spring-like structure or a woven net-like structure in its expansion plane, so as to improve the wall strength of the tube body 1.

It will be appreciated that the weave is a one-press or one-press weave, and is not intended as a limitation of the present invention.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A microporous hydrocephalus drainage device, comprising:

the cerebral infarction tube comprises a tube body (1), one end of the tube body (1) is suitable for being communicated with a cerebellum bridge brain angle pond (4), a plurality of micropore structures (11) are formed in the side wall of the other end of the tube body (1), the micropore structures (11) are suitable for being communicated with a jugular vein (5) so as to be suitable for discharging hydrocephalus of the cerebellum bridge brain angle pond (4) into the jugular vein (5), and the absolute pressure relation between the Kong Dangliang hydraulic diameter of the micropore structures (11) and liquid in the cerebellum bridge brain angle pond (4) is as follows:

wherein P is the absolute pressure of liquid in the cerebellum bridge brain angle pool (4), delta is the surface tension coefficient, D is the pore equivalent hydraulic diameter, and beta is the contact angle of liquid on the wall surface of the micropore structure (11).

2. The microporous hydrocephalus drainage device according to claim 1, wherein the microporous structure (11) is arranged on the lower half side wall of the other end of the tube body (1), and the microporous structure (11) is uniformly distributed or randomly distributed on the lower half side wall of the tube body (1).

3. The microporous hydrocephalus drainage device of claim 2, wherein the microporous structure (11) is circular, square or triangular in cross-section.

4. The microporous hydrocephalus drainage device according to claim 1, wherein one end of the tube body (1) is provided with an expansion anchoring structure (2), and the expansion anchoring structure (2) is clamped with a arachnoid layer (6) so that one end of the tube body (1) is communicated with the cerebellum bridge brain angle pool (4).

5. The microporous hydrocephalus drainage device according to claim 4, wherein the expansion anchoring structure (2) is in a circular tube shape, the expansion anchoring structure (2) is sleeved on the periphery of one end of the tube body (1), and the expansion anchoring structure (2) is made of self-expanding hydrogel materials.

6. The microporous hydrocephalus drainage device of claim 4, wherein the expanded anchoring structure (2) comprises a mounting portion (21) and an anchoring portion (22), the mounting portion (21) is sleeved on the outer periphery of one end of the tube body (1), the anchoring portion (22) is made of an elastic material, and the anchoring portion (22) has a delivery state when contracted and an anchoring state when expanded.

7. The microporous hydrocephalus drainage device as claimed in claim 4, wherein the expansion anchor structure (2) is a sheet structure, the sheet structure is made of a high polymer material, a hydrophilic coating is arranged on the outer side of the sheet structure, and a hydrophobic coating is arranged on the inner side of the sheet.

8. The microporous hydrocephalus drainage device according to any one of claims 1 to 7, wherein one end of the tube body (1) is provided with a positioning structure (3), the positioning structure (3) is annular and sleeved at one end of the tube body (1), and the positioning structure (3) is made of a metal material impermeable to X-rays.

9. The microporous hydrocephalus drainage device of any one of claims 1 to 7, wherein the tube body (1) is of at least three-layer structure, the inner layer structure (13) of the tube body (1) is made of a low friction coefficient material, the outer layer structure (12) of the tube body (1) is made of a high polymer material, and the middle layer structure (14) of the tube body (1) is made of a metal and/or alloy material.

10. The microporous hydrocephalus drainage device according to claim 9, wherein the middle layer of the tube body (1) is of a spring-like structure or its unfolded plane is of a woven mesh structure.