System for treating traffic hydrocephalus through intravascular shunt

Abstract

The invention relates to a system for treating traffic hydrocephalus through intravascular shunt. The system is composed of a shunt device and a cross-vascular working device. The shunting device comprises a shunting tube and a tube sheath; the shunt tube is partially or wholly arranged in the tube sheath; the shunting pipe comprises a head part, a body part and a tail part; a short pipe is inserted into the body part at the bottom end of the head part; the cross-vessel working device comprises an outer sleeve, an inner sleeve and a puncture tool. The device is implanted into a human body in an endovascular intervention mode, the function of arachnoid particles is simulated, the flow of cerebrospinal fluid is adjusted through the pressure gradient difference between intracranial pressure and venous pressure, or the flow is adjusted through an electric control valve, and therefore the purpose of treating traffic hydrocephalus is achieved.

Description

Technical Field

[0001] The invention relates to the field of biomedical technology, and in particular to a system for treating communicating hydrocephalus through intravascular shunt. Background Art

[0002] Communicating hydrocephalus occurs when the secretion and absorption of cerebrospinal fluid are unbalanced, leading to ventricular dilatation and increased intracranial pressure. Impaired brain tissue function leads to clinical manifestations such as decreased intelligence, unsteady walking, and incontinence. Communicating hydrocephalus mainly occurs in patients with decreased arachnoid granulation absorption function due to various diseases (such as subarachnoid hemorrhage) or aging.

[0003] Traditional treatment options for communicating hydrocephalus include ventriculoperitoneal (thoracic) shunt, lumbar peritoneal shunt, ventriculoatrial shunt, ventriculosinus shunt, etc.; all of these options require the shunt catheter to pass through the brain tissue, resulting in problems such as brain tissue damage and cerebral hemorrhage.

[0004] Chinese invention patent CN115137951A (publication date: October 4, 2022) discloses a cerebrospinal fluid shunt device implanted in a blood vessel and a method of use; the application places a valved micro-implant between the cerebral cistern and the venous sinus to simulate the function of arachnoid granulations and regulate the flow of cerebrospinal fluid by relying on the pressure gradient of intracranial pressure and venous pressure. The device meets the needs of the latest intravascular shunt treatment scheme, enables the treatment scheme to be put into use, and can reduce the chance of shunt failure.

[0005] In view of the defects of the current treatment scheme for communicating hydrocephalus, such as brain tissue damage and cerebral hemorrhage, the present invention proposes a cerebrospinal fluid shunt device for draining cerebrospinal fluid from the cerebral cistern (subarachnoid space) to the vein (venous sinus) to treat communicating hydrocephalus. This device achieves the purpose of treating communicating hydrocephalus by simulating the function of arachnoid granulations. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings and deficiencies of existing treatment schemes for communicating hydrocephalus, and to provide a system for treating communicating hydrocephalus through intravascular shunting, so as to solve the problems of brain tissue damage, damage to heart, abdominal cavity and other tissue structures caused by current surgical treatment of communicating hydrocephalus, as well as complications such as tube blockage and infection.

[0007] A system for treating communicating hydrocephalus through intravascular shunt, comprising a shunt device and a transvascular working device;

[0008] The shunt device comprises a shunt tube and a tube sheath; the shunt tube is partially or entirely placed in the tube sheath;

[0009] The transvascular working device comprises an outer sleeve, an inner sleeve, and a puncture tool arranged in the inner sleeve.

[0010] Furthermore, the shunt tube comprises a head, a body and a tail; the head is wing-shaped, spherical or triangular; a short tube is inserted into the body at its bottom; the head can be folded or opened; the wing-shaped head has 3-5 petals; the head and the body can be separated or connected to adjust the overall length of the shunt device;

[0011] The body is tubular, with a single lumen inside. There are 2-4 valves near the head of the tube, which play a role in one-way water flow and preventing backflow. There are several small holes with a diameter of 0.1-10 μm in the lower half of the tube, which allow liquid to pass from the inside of the tube to the outside of the tube and prevent blood cells outside the tube from entering the tube.

[0012] The tail is a one-way channel, which is a slit tube or a one-way valve or a filter element. The slit tube and the filter element are controlled by pressure gradient difference, and the one-way valve is controlled by pressure gradient difference or electronically controlled. There are several small holes with a diameter of 0.1-10μm on the filter element, which are used to control the liquid flow rate and prevent blood cells outside the tube from entering the tube.

[0013] Furthermore, the sheath is an inner sheath or an outer sheath, the inner sheath is a push rod, and the outer sheath is a cylindrical braided structure connected to the push rod.

[0014] Furthermore, the diameter of the head is larger than that of the body and the tail, and the body and the tail are placed in the inner sheath; or the diameter of the head is equal to that of the body and the tail, and the shunt tube is placed in the outer sheath as a whole.

[0015] Furthermore, the surface of the diversion device is coated with anticoagulant substances such as phosphorylcholine; the head is made of metal materials such as cobalt-chromium alloy, nickel-titanium alloy, or polymer elastic materials such as PEEK and PE; the body is made of polymer elastic materials such as PU and silicone or fiber materials.

[0016] Furthermore, the outer sleeve is a coaxial double-tube structure or a single-tube structure;

[0017] The total length of the coaxial double-tube structure and the single-tube structure are both 50-135 cm, the outer diameter is both 4F-9F, and the inner diameter is both 0.035-0.091 inches;

[0018] The coaxial double-tube structure includes an inner and outer double tube, which can rotate with each other, wherein the inner tube is longer than the outer tube, with a length difference of 5-20 mm; the outer tube is a single-lumen tube, with a balloon at the head end of the outer tube, and openings at the head and tail; the inner tube is a single-lumen or multi-lumen tube, which is an inner sleeve cavity with an inner diameter of 0.014-0.088 inches; the head end of the inner tube is closed, with a balloon, and the side opening of the proximal tube body of the balloon is 3F-7F in size, with one or more openings.

[0019] Furthermore, the single tube structure comprises a head section and a body section, and the head section and the body section are mutually rotated by built-in wire adjustment or electronic control;

[0020] The body segment is double-lumen, wherein the small lumen is the guidewire lumen with an inner diameter of 0.010-0.018 inches, and the large lumen is the inner tube lumen with an inner diameter of 0.035-0.091 inches; the body segment is provided with a balloon near the head segment, with an opening at the tail end and a closed tube body;

[0021] The head section is single-lumen or multi-lumen, which is an inner sleeve lumen with an inner diameter of 0.014-0.088 inches; the end of the head section is closed and has a balloon, and the side opening of the proximal tube body of the balloon is 3F-7F in size, and there are one or more openings.

[0022] Furthermore, the inner sleeve is a single-lumen tubular structure or a double-lumen tubular structure; the inner diameter of the lumen of the single-lumen tubular structure is 0.014-0.088 inches, and different instruments can be delivered; the small lumen of the double-lumen tubular structure opens on the side of the device, and the opening is 5-20 mm away from the head end of the inner sleeve, and is used to deliver the guide wire; the large lumen of the double-lumen tubular structure has an inner diameter of 0.014-0.072 inches, opens at the head end of the inner sleeve, and different instruments can be delivered; the head end of the inner sleeve is conical.

[0023] Furthermore, the inner sleeve is made of multi-layer polymer material;

[0024] The head end of the inner sleeve is made of metal material, which is petal-shaped and turned outward to form a button-like structure, and is electrically controlled; or the head end of the inner sleeve is made of polymer material, with a balloon at the end, and its tip retracts into the balloon when the balloon is opened.

[0025] Furthermore, the puncture tool is a guide wire or a guide needle; the guide wire is solid, the guide needle is hollow, and the guide needle can deliver the instrument;

[0026] The puncture tool has a diameter greater than 0.01 inches;

[0027] The entire body of the puncture tool is made of metal or polymer material, or the head end of the puncture tool is made of metal and the body is made of polymer material.

[0028] Compared with the prior art, the advantages and effects of this application are as follows:

[0029] 1. The present invention is implanted into the human body through intravascular intervention to simulate the function of arachnoid granulations, and relies on the pressure gradient difference between intracranial pressure and venous pressure to regulate the flow of cerebrospinal fluid, or regulates the flow through an electrically controlled valve, thereby achieving the purpose of treating communicating hydrocephalus.

[0030] 2. The shunt device of the present invention can be delivered to the venous sinus near the target cerebral cistern (subarachnoid space) via the intravenous route, and placed between the cerebral cistern (subarachnoid space) and the vein (venous sinus) by penetrating the dura mater, completing the bridging between the two, playing the role of cerebrospinal fluid drainage, and during the cerebrospinal fluid drainage, there will be no excessive drainage of cerebrospinal fluid due to the siphon effect, thereby causing subdural effusion or bleeding, which can significantly improve the success rate of shunt.

[0031] 3. The present invention avoids the brain tissue puncture required for current surgery, avoids brain tissue damage, and the damage to the heart, abdominal cavity and other tissue structures caused by the currently commonly used treatment methods for communicating hydrocephalus, and avoids the occurrence of complications such as tube blockage and infection.

[0032] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings as follows.

[0033] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0035] in:

[0036] Figure 1 It is a schematic diagram of the transvascular working device of the present invention;

[0037] Figure 2 Flow chart of the cross-vascular working device of the present invention; (A): fix the proximal end of the outer sleeve; (B): fix the distal end of the outer sleeve; (C): pierce the vein (sinus); (D): fix the inner sleeve.

[0038] Figure 3 It is a schematic diagram of the diversion device in the present invention;

[0039] Figure 4 It is a schematic diagram of the shunt pipe in the present invention;

[0040] Figure 5 It is a schematic diagram of the sheath in the present invention;

[0041] Among them: 1-shunt tube; 2-tube sheath; 3-outer cannula; 4-inner cannula; 5-puncture tool; 11-head; 12-body; 13-tail. Specific embodiments

[0042] To make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all of the embodiments. In the following description, specific details such as specific configuration and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures is omitted in the embodiment.

[0043] It should be understood that the references to "one embodiment" or "this embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "one embodiment" or "this embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0044] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0045] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] The term "at least one" in this article is merely a description of the association relationship of associated objects, indicating that there may be three relationships. For example, at least one of A and B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0047] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0048] Example 1

[0049] See also Figure 1 This embodiment introduces a transvascular working device of a system for treating communicating hydrocephalus through intravascular shunting, including an outer sleeve 3, an inner sleeve 4, and a puncture tool 5 arranged in the inner sleeve.

[0050] Furthermore, the outer sleeve 3 is a coaxial double-tube structure or a single-tube structure;

[0051] The total length of the coaxial double-tube structure and the single-tube structure are both 50-135 cm, the outer diameter is both 4F-9F, and the inner diameter is both 0.035-0.091 inches;

[0052] The coaxial double-tube structure includes an inner and outer double tube, which can rotate with each other, wherein the inner tube is longer than the outer tube, and the length difference is 5-20mm; the outer tube is a single-lumen tube, and has a balloon at the head end of the outer tube, with head and tail openings; the inner tube is a single-lumen or multi-lumen tube, which is an inner sleeve tube cavity, with an inner diameter of 0.014-0.088 inches; in this case, the head end of the inner sleeve 4 is closed, and has a balloon, and the tail end of the inner sleeve 4 is open, and the size of the side opening of the balloon segment or the proximal tube body of the balloon is 3F-7F, and there can be one or more openings.

[0053] Furthermore, the single tube structure comprises a head section and a body section, and the head section and the body section are mutually rotated by built-in wire adjustment or electronic control;

[0054] The body segment is double-lumen, wherein the small lumen is the guidewire lumen with an inner diameter of 0.010-0.018 inches, and the large lumen is the inner tube lumen with an inner diameter of 0.035-0.091 inches; the body segment is provided with a balloon near the head segment, with an opening at the tail end and a closed tube body;

[0055] The head section is single-lumen or multi-lumen, which is an inner sleeve lumen with an inner diameter of 0.014-0.088 inches; the end of the head section is closed and has a balloon, and the side opening of the proximal tube body of the balloon is 3F-7F in size, and there are one or more openings.

[0056] Furthermore, the inner sleeve 4 is a single-lumen tubular structure or a double-lumen tubular structure; the inner diameter of the lumen of the single-lumen tubular structure is 0.014-0.088 inches, which can transport different instruments; the small lumen of the double-lumen tubular structure opens on the side of the device, and the opening is 5-20 mm away from the head end of the inner sleeve 4, which is used to transport the guide wire; the large lumen of the double-lumen tubular structure has an inner diameter of 0.014-0.072 inches, opens at the head end of the inner sleeve 4, and can transport different instruments; the head end of the inner sleeve 4 is conical.

[0057] Furthermore, the inner sleeve 4 is made of multi-layer polymer material;

[0058] The head end of the inner sleeve 4 is made of metal material, which is petal-shaped and turned outward to form a button-like structure, and is electrically controlled; or the head end of the inner sleeve 4 is made of polymer material, with a balloon at the end, and its tip retracts into the balloon when the balloon is opened.

[0059] Furthermore, the puncture tool 3 is a guide wire or a guide needle; the guide wire is solid, the guide needle is hollow, and the guide needle can deliver the instrument;

[0060] The puncture tool 3 has a diameter greater than 0.01 inches;

[0061] The entire body of the puncture tool 3 is made of metal or polymer material, or the head end of the puncture tool 3 is made of metal and the body is made of polymer material.

[0062] Please refer to the implementation process of the transvascular working device for Figure 2 , which comprises the following steps:

[0063] S21, puncture the femoral vein or internal jugular vein from outside, place the outer sleeve under the guidance of the guide wire at the target position of the internal jugular vein or venous sinus, and fill the proximal end of the outer sleeve with a balloon to fix the sleeve;

[0064] S22. Rotate the inner tube or the head of the outer cannula to direct the lateral opening toward the intended puncture site in the vein (venous sinus), and inflate the distal balloon of the outer cannula to fix it;

[0065] S23. Send the inner cannula and puncture guide wire (needle) along the outer cannula to the side opening of the outer cannula. The puncture guide wire (needle) pierces the vein (sinus). The tip of the inner cannula enters the outside of the vein (sinus) along the guide wire (needle). The metal part of the tip of the inner cannula is turned outward to form a button or fixed with a balloon at the tip.

[0066] The technical effect obtained by this embodiment is: implanted into the human body through intravascular intervention, simulating the function of arachnoid granulations, relying on the pressure gradient difference between intracranial pressure and venous pressure to regulate the flow of cerebrospinal fluid, or regulating the flow through an electrically controlled valve, thereby achieving the purpose of treating communicating hydrocephalus.

[0067] Example 2

[0068] See also Figure 3 , a shunt device for treating communicating hydrocephalus through intravascular shunt; comprising a shunt tube 1 and a sheath 2; the shunt tube 1 is partially or entirely placed in the sheath 2; the shunt tube 1 is referred to Figure 4 ; The sheath 2 can be found in Figure 5 ;

[0069] Furthermore, the shunt tube 1 comprises a head 11, a body 12 and a tail 13; the head 11 is wing-shaped, spherical or triangular; a short tube is inserted into the body 12 at its bottom; the head can be shrunk or opened; the wing-shaped head 11 has 3-5 petals; the head 11 and the body 12 can be separated or connected to adjust the overall length of the shunt device;

[0070] The body 12 is tubular, with a single lumen inside. There are 2-4 valves near the head end of the tube, which play a role in one-way water flow and preventing backflow. There are a number of small holes with a diameter of 0.1-10 μm in the lower half of the tube, which allow liquid to pass from the inside of the tube to the outside of the tube and prevent blood cells outside the tube from entering the tube.

[0071] The tail portion 13 is a one-way channel, which is a slit tube or a one-way valve or a filter element. The slit tube and the filter element are controlled by pressure gradient difference, and the one-way valve is controlled by pressure gradient difference or electronically controlled. The filter element has a plurality of small holes with a diameter of 0.1-10 μm, which are used to control the liquid flow rate and prevent blood cells outside the tube from entering the tube.

[0072] Furthermore, the sheath 2 is an inner sheath or an outer sheath, the inner sheath is a push rod, and the outer sheath is a cylindrical braided structure connected to the push rod.

[0073] Furthermore, the diameter of the head 11 is larger than that of the body 12 and the tail 13, and the body 12 and the tail 13 are placed in the inner sheath; or the diameter of the head 11 is equal to that of the body 12 and the tail 13, and the shunt tube 1 is placed in the outer sheath as a whole.

[0074] Furthermore, the surface of the diversion device is coated with an anti-coagulant substance; the head 11 is made of a metal material or a polymer elastic material; and the body 12 is made of a polymer elastic material.

[0075] The shunt device requires the following steps when implanted:

[0076] S11. Insert the shunt device along the inner sheath of the transvascular working device or the inner lumen of the puncture needle, with the head end located in the brain cistern (subarachnoid space) outside the vein (sinus);

[0077] S12. The puncture needle or the outer sheath of the shunt device is withdrawn, and the head end of the shunt device automatically opens and is located in a flap, spherical or triangular shape and fixed in the brain cistern (subarachnoid space);

[0078] S13, remove the inner sheath of the shunt device and the transvascular working device;

[0079] S14. The bionic shunt device is implanted, and cerebrospinal fluid flows from the subarachnoid space into the venous sinus or internal jugular vein following the pressure gradient.

[0080] The technical effect obtained by this embodiment is: the shunt device of the present application can be delivered to the venous sinus near the target cerebral cistern (subarachnoid space) via the intravenous route, and is placed between the cerebral cistern (subarachnoid space) and the vein (venous sinus) by penetrating the dura mater, completing the bridging of the two, playing the role of cerebrospinal fluid drainage, and during the cerebrospinal fluid drainage, the siphon effect will not cause excessive drainage of cerebrospinal fluid to cause subdural effusion or bleeding, which can significantly improve the success rate of shunt; the present application avoids the brain tissue puncture required for current surgery, avoids brain tissue damage, and the damage to tissue structures such as the heart and abdominal cavity caused by the currently commonly used treatment methods for communicating hydrocephalus, and avoids the occurrence of complications such as blockage and infection.

[0081] The above description is only the preferred embodiment of the present invention, which does not limit the protection scope of the present invention. For those skilled in the art, the present invention can be modified and varied in various ways. Within the spirit and principle of the present invention, any change, modification, replacement, integration and parameter change of these embodiments by conventional substitution or capable of achieving the same function without departing from the principle and spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A system for treating communicating hydrocephalus by intravascular shunting, characterized in that: The system is composed of a shunt device and a transvascular working device; The shunt device comprises a shunt tube (1) and a tube sheath (2); the shunt tube (1) is partially or entirely placed in the tube sheath (2); The transvascular working device comprises an outer sleeve (3), an inner sleeve (4), and a puncture tool (5) arranged in the inner sleeve.

2. A system for treating communicating hydrocephalus by intravascular shunting according to claim 1, characterized in that: The shunt pipe (1) comprises a head (11), a body (12) and a tail (13); The head (11) is wing-shaped, spherical or triangular in shape; a short tube is inserted into the body (12) at its bottom end; The body (12) is tubular, the interior of the body is a single lumen, a valve is provided near the head (11), and a plurality of small holes with a diameter of 0.1-10 μm are provided in the lower half of the body; The tail portion (13) is a one-way channel, a slit tube or a one-way valve or a filter element. The slit tube and the filter element are controlled by pressure gradient difference, and the one-way valve is controlled by pressure gradient difference or electronically controlled. The filter element has a plurality of small holes with a diameter of 0.1-10 μm.

3. A system for treating communicating hydrocephalus by intravascular shunting according to claim 1, characterized in that: The tubular sheath (2) is an inner sheath or an outer sheath, the inner sheath is a push rod, and the outer sheath is a cylindrical braided structure connected to the push rod.

4. A system for treating communicating hydrocephalus by intravascular shunting according to claim 2 or 3, characterized in that: The diameter of the head (11) is larger than that of the body (12) and the tail (13), and the body (12) and the tail (13) are placed in the inner sheath; or the diameter of the head (11) is equal to that of the body (12) and the tail (13), and the shunt tube (1) is placed in the outer sheath as a whole.

5. A system for treating communicating hydrocephalus by intravascular shunting according to claim 4, characterized in that: The head (11) is made of metal material or polymer elastic material, and the body (12) is made of polymer elastic material.

6. A system for treating communicating hydrocephalus by intravascular shunting according to claim 1, characterized in that: The outer sleeve (3) is a coaxial double-tube structure or a single-tube structure; The total length of the coaxial double-tube structure and the single-tube structure are both 50-135 cm, the outer diameter is both 4F-9F, and the inner diameter is both 0.035-0.091 inches; The coaxial double-tube structure includes an inner and outer double tube, the inner tube is longer than the outer tube, and the length difference is 5-20 cm; the outer tube is a single-lumen tube, with a balloon at the head end of the outer tube, openings at the head and tail, and a completely closed tube body; the inner tube is a double-lumen or multi-lumen tube, wherein the small lumen is a guide wire lumen with an inner diameter of 0.010-0.018 inches, and the large lumen is an inner sheath lumen with an inner diameter of 0.035-0.091 inches.

7. A system for treating communicating hydrocephalus by intravascular shunting according to claim 6, characterized in that: The single tube structure includes a head section and a body section; The body segment is double-lumen, wherein the small lumen is the guidewire lumen with an inner diameter of 0.010-0.018 inches, and the large lumen is the inner tube lumen with an inner diameter of 0.035-0.091 inches; the body segment is provided with a balloon near the head segment, with an opening at the tail end and a closed tube body; The head section is single-lumen or multi-lumen, which is an inner sleeve lumen with an inner diameter of 0.014-0.088 inches; the end of the head section is closed and has a balloon, and the side opening of the proximal tube body of the balloon is 3F-7F in size, and there are one or more openings.

8. A system for treating communicating hydrocephalus by intravascular shunting according to claim 1, characterized in that: The inner sleeve (4) is a single-lumen tubular structure or a double-lumen tubular structure; the inner diameter of the lumen of the single-lumen tubular structure is 0.010-0.091 inches; the small lumen of the double-lumen tubular structure opens on the side of the device, the opening is 0.5-2 cm away from the head end of the inner sleeve (4), and the inner diameter of the large lumen is 0.014-0.072 inches, opening at the head end of the inner sleeve (4); the head end of the inner sleeve (4) is conical.

9. A system for treating communicating hydrocephalus by intravascular shunting according to claim 8, characterized in that: The inner sleeve (4) is made of multi-layer polymer material; The head end of the inner sleeve (4) is made of metal material and is turned outward in a petal shape to form a button-like structure; or the head end of the inner sleeve (4) is made of polymer material and has a balloon at the end, and its tip is retracted into the balloon when the balloon is opened.

10. A system for treating communicating hydrocephalus by intravascular shunting according to claim 1, characterized in that: The puncture tool (3) is a guide wire or a guide needle; the guide wire is solid, and the guide needle is hollow; The puncture tool (3) has a diameter greater than 0.01 inches; The entire body of the puncture tool (3) is made of metal or polymer material, or the tip of the puncture tool (3) is made of metal and the body is made of polymer material.

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