Tearable shunt tube sheath for ventricular jugular vein shunt

Abstract

The invention relates to the technical field of tearable tube sheaths, in particular to a tearable shunt tube sheath for ventricular jugular vein shunt, which comprises a catheter sheath and a mounting base inserted into the upper end of the catheter sheath, the catheter sheath is detachably connected with the mounting base, and an expansion catheter is fixedly mounted at the upper end of the mounting base. A hemostasis valve is mounted at the lower end of the mounting base; mechanical locking and pressing force adjustment are conducted on the two tearable tubes through the connecting piece, the situation that a traditional tube sheath needs to be torn open is avoided by pulling the pulling-out unit, the connecting piece is stably and linearly pulled out as a whole, and in the process, instant traction force and vibration generated due to material tearing and buckle separation when a sheath tube is torn in a traditional mode are completely avoided; the risk of tiny displacement of the tip of the accurately positioned shunt tube caused by sheath tube removal operation is eliminated, the shunt tube is always stabilized at the optimal position in the middle of the right atrium, and the operation success rate is increased.

Description

Technical Field

[0001] This application relates to the field of tearable sheath technology, and in particular to a tearable shunt sheath for ventriculojugular shunt. Background Technology

[0002] Ventriculoperitoneal shunt (VPS) is an important surgical procedure for treating diseases such as hydrocephalus. Its core principle is to drain excess cerebrospinal fluid accumulated in the ventricles through a subcutaneously implanted shunt system into the jugular vein, ultimately allowing it to enter the bloodstream. This surgery typically involves two main phases: the intracranial phase and the cervical phase. Traditional cervical surgery requires a 3-5cm incision in the neck and venous dissection, which can lead to venous injury, vagal nerve traction, and postoperative neck scarring. The innovative use of a puncture catheter sheath allows for minimally invasive surgery, avoiding complications associated with traditional methods and shortening the operation time, especially beneficial for obese or short-necked patients.

[0003] In the prior art, CN222998139U provides a disposable tearable catheter sheath. Specifically, a sheath connector is provided at the rear end of the sheath insertion, and tear marks are provided on both sides of the sheath surface along the axial direction. An expansion tube connector is provided at the rear end of the expansion tube insertion, and a sealing component is provided between the sheath connector and the expansion tube connector. This ensures that doctors can easily and quickly tear the sheath during use, and the tear is smooth, reducing damage to the patient's blood vessels and nerves, while also ensuring the stability of the hemostatic valve.

[0004] The existing technology has the following drawbacks: 1. During the tearing process, the tearing force applied to the sheath will inevitably be transmitted to the shunt tube and its tip inside the sheath. This slight traction or vibration may cause the tip of the shunt tube, which has been precisely located in the middle of the right atrium, to shift, directly affecting the safety of the operation; 2. After the tearable sheath is torn, the torn sheath may not completely detach from the shunt tube, or small fragments may be stuck between the shunt tube and the surrounding tissue. This not only increases the risk of infection, but the residue, as a foreign body, may also become the core of thrombus formation, seriously threatening the patient's safety. Based on this, there is still room for improvement on the existing tearable shunt sheath. Summary of the Invention

[0005] To address the problems existing in the background art, the present invention proposes a tearable shunt sheath for ventricular jugular vein shunt.

[0006] The tearable shunt sheath for ventriculoperitoneal shunt provided in this application adopts the following technical solution: A tearable shunt sheath for ventriculocytic shunt includes: a catheter sheath and a mounting base inserted into the upper end of the catheter sheath, the catheter sheath and the mounting base being detachably connected, a dilator catheter being fixedly mounted on the upper end of the mounting base, and a hemostatic valve being mounted on the lower end of the mounting base.

[0007] The catheter sheath includes two symmetrically arranged tearable tubes with a semi-circular cross-section. The sidewalls of the tearable tubes have mounting grooves. The two tearable tubes are sealed together by a connector. A tube seat is installed at the upper end of the tearable tube. The tube seat and the tearable tube are integrally formed. A handle is installed on the outside of the tube seat. An arc-shaped groove is opened on the sidewall of the tube seat. The two arc-shaped grooves fit together to form an arc-shaped channel. An extraction unit is installed in the arc-shaped channel. The lower end of the extraction unit is fixedly connected to the connector. The outer end of the extraction unit extends to the outside of the tube seat.

[0008] Furthermore, the inner wall of the tearable tube is smooth, and a tapered rubber end is provided at the lower end of the tearable tube. The tearable tube is made of a biocompatible material.

[0009] Furthermore, the connector includes a flexible strip and a rigid strip, with two rigid strips, and a flexible strip is installed between the two rigid strips, and the flexible strip and the rigid strip are bonded together.

[0010] Furthermore, the flexible belt has a corrugated structure, and the flexible belt can drive the two rigid belts to extend and retract laterally. The flexible belt has a first cavity inside.

[0011] Furthermore, the rigid strip has a second cavity inside, and a locking element is installed inside the second cavity.

[0012] Furthermore, the locking component includes an airbag and a plug plate. An airbag is installed inside the second cavity. Through holes are evenly opened on both sides of the rigid strip. The through holes are arranged at an angle. A plug plate is slidably disposed in the through holes. The inner side of the plug plate is fixedly connected to the airbag. The airbag can drive the plug plate to extend out from inside the through holes.

[0013] Furthermore, the mounting groove has a mushroom-shaped cross-section, and the plug-in plate can be locked with the mounting groove when it extends, so that the two tearable tubes are tightly attached to each other.

[0014] Furthermore, the extraction unit includes a connecting pipe, a mounting base, and a locking seat. The connecting pipe is provided inside the arc-shaped channel, and the lower end of the connecting pipe is connected to the connector. A mounting base is installed on the outside of the pipe base. There are two mounting bases, which are respectively installed on two pipe bases. A locking seat is sleeved on the connecting pipe, and the locking seat is connected to the mounting base by a threaded connection.

[0015] Furthermore, a limit ring is provided on the connecting pipe, and a pull bracket is installed on both sides of the locking seat.

[0016] Furthermore, the connecting pipe has a hollow structure inside, and the inside of the connecting pipe is connected to the first cavity. Conduits are installed on both sides of the end of the connecting pipe, and the conduits are connected to the inside of the second cavity.

[0017] Beneficial effects Compared with the prior art, the present invention provides a tearable shunt sheath for ventricular jugular vein shunt, which has the following beneficial effects: 1. In this invention, the mechanical locking and clamping force of the connector on the two tearable tubes is first released by gas control, which significantly reduces friction. Then, by pulling the extraction unit, the connector is smoothly and linearly extracted as a whole, avoiding the need to tear open the traditional sheath. This process completely avoids the instantaneous pulling force and vibration caused by material tearing and buckle separation when tearing the sheath in the traditional way. It also eliminates the risk of slight displacement of the precisely positioned shunt tip caused by the sheath removal operation, ensuring that it is always stable in the optimal position in the middle of the right atrium. This effectively prevents the formation of venous thrombosis caused by shallow displacement and the risk of cardiac stimulation or perforation caused by deep displacement, thus improving the success rate of the operation.

[0018] 2. In this invention, after the connector is completely removed, there is no physical connection between the two tearable tubes. They can be easily removed by gently separating them to the sides. Combined with the smooth inner wall of the tearable tube and the design that precisely matches the outer diameter of the shunt tube, it ensures that the two tearable tubes can slide smoothly and completely along the shunt tube after separation. This fundamentally eliminates the risk of sheath fragments or parts of the structure getting stuck between the shunt tube and the tissue or accidentally falling off and remaining in the blood vessel lumen, greatly reducing the possibility of serious complications such as infection, foreign body reaction, and thrombosis.

[0019] 3. In this invention, the tapered rubber tip at the lower end of the tearable tube is a flexible structure with a smooth inner wall. During the insertion, indwelling, and final removal of the catheter sheath, the flexible tapered tip can conform to the venous anatomy, buffer the contact pressure, and avoid scratching or abrasion of the venous endothelium by the hard edge. The smooth inner wall reduces the frictional resistance with the shunt tube and the vessel wall, protects the integrity of the jugular vein intima to the greatest extent, and effectively reduces venous intima damage induced by sheath operation.

[0020] 4. In this invention, the connector adopts a locking mechanism that combines inflation and deflation, combined with a mushroom-shaped installation groove design. During the insertion and use of the sheath, this mechanism can powerfully and reliably press the two tearable tubes tightly together, forming an effective dynamic seal at the connection seam. This prevents blood from seeping out or flowing back along the outer wall of the sheath, significantly reducing bleeding or seepage in the surgical area, maintaining a clear surgical field, reducing the risk of blood loss and related complications, and improving surgical efficiency and safety. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a three-dimensional structural diagram of this application.

[0023] Figure 2 This is a three-dimensional cross-sectional structural diagram of this application.

[0024] Figure 3 This is a cross-sectional structural diagram of this application.

[0025] Figure 4 This is a three-dimensional structural diagram of the catheter sheath of this application.

[0026] Figure 5 This is a three-dimensional structural diagram of the connection between the connector and the extraction unit in this application.

[0027] Figure 6 This is a partial structural diagram of the connection between the connector and the extraction unit in this application.

[0028] Figure 7 This is a cross-sectional structural diagram of the tearable tube and the connector in this application.

[0029] Figure 8 This is a cross-sectional structural diagram of the tearable tube and the connector in this application.

[0030] Figure 9 This is a cross-sectional structural diagram of the connector in this application.

[0031] Figure 10 This is a three-dimensional structural diagram of the extraction unit of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Catheter sheath; 11. Tearable tube; 111. Tapered rubber end; 12. Connector; 121. Flexible band; 1211. First cavity; 122. Rigid band; 1222. Second cavity; 123. Locking element; 1231. Balloon; 1232. Insertion plate; 13. Tube seat; 14. Handle; 15. Withdrawal unit; 151. Connecting tube; 1511. Catheter; 152. Mounting seat; 153. Locking seat; 154. Limiting ring; 155. Pulling frame; 2. Mounting base; 3. Dilatation catheter; 4. Hemostatic valve. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-10The present invention provides a tearable shunt sheath for ventriculocytic shunt, comprising: a catheter sheath 1 and a mounting base 2 inserted inside the upper end of the catheter sheath 1, wherein the catheter sheath 1 and the mounting base 2 are detachably connected, an expansion catheter 3 is fixedly mounted on the upper end of the mounting base 2, and a hemostatic valve 4 is mounted on the lower end of the mounting base 2.

[0035] In the above technical solution, before performing jugular vein puncture, a small incision needs to be made on the scalp (usually in the parietal or frontal bone region, avoiding important functional areas). A small bone hole ("bone window") is drilled in the skull at the incision site. The dura mater is carefully cut open, and a special ventriculoperitoneal puncture needle or a catheter with a guide core is used to puncture at a pre-set direction and depth. When the puncture is successful, cerebrospinal fluid will flow out. A pouch-like space ("sac") is separated under the scalp (usually above the ear or in the occipital region), and the ventriculoperitoneal catheter is connected to the shunt valve.

[0036] During the neck surgery phase, an incision is made in the neck (usually along the anterior border of the sternocleidomastoid muscle) to expose the internal jugular vein or external jugular vein (usually the internal jugular vein). The target vein is then dissected, exposed, or percutaneously punctured. Under ultrasound guidance, the internal jugular vein is punctured, a guidewire is inserted, and a dilator is inserted along the guidewire to expand the subcutaneous channel. Catheter sheath 1 is then inserted, the dilator and guidewire are withdrawn, and a shunt tube is inserted through catheter sheath 1. The shunt tube is passed through the jugular vein end to the predetermined depth. Catheter sheath 1 is torn open and withdrawn, and the end of the shunt tube is connected to the shunt valve to drain excess cerebrospinal fluid into the bloodstream.

[0037] When inserting a shunt, it must be done under the guidance of X-ray fluoroscopy. The tip of the shunt must be located in the middle of the right atrium. Insertion that is too shallow may lead to venous thrombosis, while insertion that is too deep may irritate the heart or enter the ventricle.

[0038] See Figures 4-7 As shown, the catheter sheath 1 includes two symmetrically arranged tearable tubes 11. The tearable tubes 11 have a semi-circular cross-section and an installation groove on the side wall of the tearable tubes 11. The two tearable tubes 11 are sealed together by a connector 12. A tube seat 13 is installed at the upper end of the tearable tubes 11. The tube seat 13 is integrally formed with the tearable tubes 11. A handle 14 is installed on the outside of the tube seat 13. An arc-shaped groove is opened on the side wall of the tube seat 13. The two arc-shaped grooves fit together to form an arc-shaped channel. An extraction unit 15 is installed in the arc-shaped channel. The lower end of the extraction unit 15 is fixedly connected to the connector 12. The outer end of the extraction unit 15 extends to the outside of the tube seat 13.

[0039] In the above technical solution, when the diverter tube is accurate and the tearable tube 11 is being torn open, the connecting piece 12 between the two tearable tubes 11 is first extracted by the extraction unit 15. The extraction process is smooth and will not cause displacement of the tearable tube 11 or the diverter tube. After the connecting piece 12 is completely extracted, the two tearable tubes 11 are completely separated, avoiding the slight pulling or vibration generated when tearing traditional tearable tubes, and ensuring that the tearable tube 11 will not cause disturbance to the placed diverter tube when it is torn open and extracted.

[0040] See Figures 4-7 As shown, as a preferred technical solution in this embodiment, the inner wall of the tearable tube 11 is smooth, and a tapered rubber end 111 is provided at the lower end of the tearable tube 11. The tearable tube 11 is made of a biocompatible material.

[0041] In the above technical solution, the inner wall of the tearable tube 11 is smooth, and the channel formed between the two tearable tubes 11 is exactly adapted to the outer diameter of the shunt tube, which facilitates accurate insertion of the shunt tube and easy withdrawal of the tearable tube 11 after tearing; and the tearable tube 11 can be completely detached from the shunt tube after tearing, without getting stuck between the shunt tube and the tissue or remaining in the blood vessel; the tapered rubber end 111 at the lower end of the tearable tube 11 is a flexible structure, which can prevent the tearable tube 11 from damaging the venous intima or perforating the vein during insertion or indwelling, thereby reducing the risk of thrombosis.

[0042] See Figures 6-9 As shown, in this preferred embodiment, the connector 12 includes a flexible strip 121 and a rigid strip 122. There are two rigid strips 122, and a flexible strip 121 is installed between the two rigid strips 122. The flexible strip 121 and the rigid strip 122 are bonded together.

[0043] See Figure 9 As shown, as a preferred technical solution in this embodiment, the flexible strip 121 has a corrugated structure, and the flexible strip 121 can drive the two rigid strips 122 to extend and retract laterally. The flexible strip 121 has a first cavity 1211 inside.

[0044] See Figure 9 As shown, in this preferred embodiment, the rigid strip 122 has a second cavity 1221 inside, and a locking member 123 is installed inside the second cavity 1221.

[0045] In the above technical solution, when sealing the two symmetrically arranged tearable tubes 11, a flexible strip 121 is inserted into the mounting groove on the side wall of the tearable tube 11 to press the two tearable tubes 11 together to prevent deformation. Then, air is injected into the first cavity 1211, which can drive the two rigid strips 122 to move outward, ensuring that the rigid strips 122 can fit tightly against the inner wall of the mounting groove. Then, air is injected into the second cavity 1221, and the locking member 123 inside the second cavity 1221 extends outward and locks into the mounting groove. Finally, air is extracted from the first cavity 1211, causing the flexible strip 121 to contract and thus shorten the distance between the rigid strips 122. This allows the rigid strips 122 to drive the locking member 123 to press the two tearable tubes 11 together, preventing gaps between the tearable tubes 11 and reducing bleeding.

[0046] When the connector 12 needs to be pulled out along with the extraction unit 15, air is first injected into the first cavity 1211 to increase the distance between the two rigid strips 122 and prevent the locking member 123 from being excessively pressed against the inner wall of the mounting groove. Then, air is extracted into the second cavity 1221 so that the locking member 123 can be retracted into the rigid strip 122. Then, the air inside the first cavity 1211 is discharged so that the flexible strip 121 and the rigid strip 122 do not contact the mounting groove, reducing the friction between the flexible strip 121 and the rigid strip 122 and the mounting groove, making it easier to pull out the connector 12.

[0047] See Figure 9 As shown, as a preferred technical solution of this embodiment, the locking member 123 includes an airbag 1231 and a plug plate 1232. The airbag 1231 is installed inside the second cavity 1221. Through holes are evenly opened on both sides of the rigid band 122. The through holes are arranged at an incline. The plug plate 1232 is slidably disposed in the through holes. The inner side of the plug plate 1232 is fixedly connected to the airbag 1231. The airbag 1231 can drive the plug plate 1232 to extend out from the through hole.

[0048] In the above technical solution, the airbag 1231 is made of elastic material. When air is injected into the airbag 1231, the airbag 1231 drives the plug plate 1232 to extend outward, so that the plug plate 1232 can be engaged with the mounting slot, so that the two tearable tubes 11 can be tightly attached. When air is depressurized into the airbag 1231, the airbag 1231 contracts, and the airbag 1231 drives the plug plate 1232 to reset, so that the two tearable tubes 11 can be completely separated.

[0049] See Figure 9 As shown, in this preferred embodiment, the mounting groove has a mushroom-shaped cross-section, and the plug plate 1232 can be locked with the mounting groove when it extends, so that the two tearable tubes 11 are tightly attached to each other.

[0050] In the above technical solution, when air is injected into the airbag 1231, the airbag 1231 drives the insertion plate 1232 to extend, so that the insertion plate 1232 can be inserted into the side of the mounting groove. Then, when the flexible band 121 contracts, the insertion plate 1232 pulls the two tearable tubes 11 inward, so that no gap is generated between the tearable tubes 11, avoiding bleeding during the operation.

[0051] See Figure 10 As shown, in this preferred embodiment, the extraction unit 15 includes a connecting pipe 151, a mounting base 152, and a locking base 153. The connecting pipe 151 is provided inside the arc-shaped channel. The lower end of the connecting pipe 151 is connected to the connector 12. The mounting base 152 is installed on the outside of the pipe seat 13. There are two mounting bases 152, which are respectively installed on two pipe seats 13. The locking base 153 is sleeved on the connecting pipe 151 and is connected to the mounting base 152 by a threaded connection.

[0052] In the above technical solution, the locking seat 153 locks the tube seat 13 at the upper end of the tearable tube 11 through the mounting seat 152, so as to prevent the two tube seats 13 from separating or accidentally touching and causing the tearable tube 11 to separate. The lower end of the connecting tube 151 is connected to the connector 12, which can both inject or evacuate air into the connector 12 and pull out the connector 12.

[0053] See Figure 10 As shown, in this preferred embodiment, the connecting pipe 151 is provided with a limit ring 154, and the locking seat 153 is equipped with a pull bracket 155 on both sides.

[0054] In the above technical solution, when the locking seat 153 is unscrewed from the mounting seat 152, the locking seat 153 can be pulled by the pulling bracket 155. The limiting ring 154 can play a blocking role, so that the entire connecting pipe 151 and the connecting piece 12 can be pulled out at the same time as the locking seat 153 is pulled.

[0055] See Figure 10 As shown, in this preferred embodiment, the connecting pipe 151 has a hollow structure inside, and the inside of the connecting pipe 151 is connected to the first cavity 1211. The connecting pipe 151 has conduits 1511 installed on both sides of its end, and the conduits 1511 are connected to the inside of the second cavity 1221.

[0056] In the above technical solution, by injecting and evacuating air into the first cavity 1211 and the second cavity 1221, the function of accurately controlling the connector 12 can be realized, so that the connector 12 can be accurately connected to the two tearable tubes 11.

[0057] Based on the above structure, the tearable shunt sheath for ventricular jugular vein shunt provided by the present invention operates according to the following steps: S1: Jugular vein puncture and access establishment Make an incision in the neck (anterior border of the sternocleidomastoid muscle) to expose or percutaneously puncture the target internal / external jugular vein (usually the internal jugular vein). Under ultrasound guidance, puncture the vein, insert a guidewire, and then insert a dilator along the guidewire to dilate the subcutaneous channel. Remove the dilator, insert a catheter sheath 1 along the guidewire, ensuring that the tapered rubber tip 111 at the lower end of the catheter sheath 1 enters the vein, and finally remove the guidewire.

[0058] S2: Insertion and positioning of the shunt tube through the sheath A shunt tube (jugular vein end) is inserted through the catheter sheath 1. Under X-ray fluoroscopy guidance, the tip of the shunt tube is pushed to the predetermined depth (middle of the right atrium) to ensure accurate positioning (avoiding thrombosis due to being too shallow or irritating the heart due to being too deep). The correct position of the shunt tube is then confirmed.

[0059] S3: Unlock connector and prepare to tear the sheath. By unlocking the connector 12 through the extraction unit 15, air is injected into the first cavity 1211, causing the flexible band 121 to extend and increasing the distance between the two rigid bands 122, thus reducing the clamping force between the locking member 123 and the mounting groove; air is then extracted into the second cavity 1221, causing the airbag 1231 to contract and causing the plug plate 1232 to retract into the rigid band 122, releasing the lock with the mounting groove; the gas in the first cavity 1211 is then discharged, causing the flexible band 121 and the rigid band 122 to contract and disengage from the inner wall of the mounting groove, minimizing friction.

[0060] S4: Smoothly withdraw the connecting piece and separate the sheath. Loosen and remove the locking seat 153 to release the fixation of the two tube seats 13. Pull out the locking seat 153 and the connecting tube 151 connected to it smoothly by pulling the bracket 155. The movement of the connecting tube 151 will simultaneously pull out the unlocked connecting parts 12 (flexible strip 121 and rigid strip 122) completely from the mounting slots of the two tearable tubes 11. After the connecting parts 12 are pulled out, the two tearable tubes 11 are completely separated.

[0061] S5: Remove the sheath to complete the connection. Carefully tear and remove the two separate tearable tubes 11 from both sides of the shunt tube, ensuring that the tearable tubes 11 are completely removed from the shunt tube and surrounding tissues / blood vessels without any residue. Connect the end of the shunt tube at the neck incision to the shunt valve that has been pre-embedded in the scalp pouch to complete the connection of the shunt system, allowing cerebrospinal fluid to be drained into the blood circulation through the shunt tube.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A tearable shunt sheath for a ventriculocervical shunt, characterized in that, The utility model relates to a kind of medical device, including: Catheter sheath (1) and installation base (2) are inserted in the inside of the upper end of catheter sheath (1), detachable connection between catheter sheath (1) and installation base (2), the upper end of installation base (2) is fixedly installed with dilating catheter (3), the lower end of installation base (2) is installed with hemostatic valve (4); The catheter sheath (1) includes two mutually symmetrical tearable tubes (11), the cross section of the tearable tube (11) is in a semicircular shape, an installation groove is formed on the side wall of the tearable tube (11), the two tearable tubes (11) are sealingly connected by a connecting piece (12), the upper end of the tearable tube (11) is provided with a tube seat (13), the tube seat (13) is integrally formed with the tearable tube (11), a handle (14) is installed on the outer side of the tube seat (13), an arc-shaped groove is formed on the side wall of the tube seat (13), the two arc-shaped grooves are fitted to form an arc-shaped channel, an extraction unit (15) is installed in the arc-shaped channel, the lower end of the extraction unit (15) is fixedly connected with the connecting piece (12), and the outer end of the extraction unit (15) extends to the outer side of the tube seat (13).

2. A peelable shunt sheath for a ventriculocervical shunt according to claim 1, wherein: The inner wall of the tearable tube (11) is a smooth surface, the lower end of the tearable tube (11) is provided with a tapered rubber end (111), and the tearable tube (11) is made of a biocompatible material.

3. A peelable shunt sheath for a ventriculocervical shunt according to claim 2, wherein: The connecting piece (12) includes a flexible band (121) and a hard band (122), the number of the hard band (122) is two, the flexible band (121) is installed between the two hard bands (122), and the flexible band (121) and the hard band (122) are adhesively connected.

4. A peelable shunt sheath for a ventriculocervical shunt according to claim 3, wherein: The flexible band (121) is in a corrugated structure, the flexible band (121) can drive the two hard bands (122) to transversely stretch and contract, and the flexible band (121) is internally provided with a first cavity (1211).

5. A peelable shunt sheath for a ventriculocervical shunt according to claim 4, wherein: The hard band (122) is internally provided with a second cavity (1221), and the second cavity (1221) is internally installed with a locking piece (123).

6. A peelable shunt sheath for a ventriculocervical shunt according to claim 5, wherein: The locking piece (123) includes an air bag (1231) and a plug-in plate (1232), the second cavity (1221) is internally installed with the air bag (1231), the hard band (122) is uniformly provided with through holes on both sides, the through holes are obliquely arranged, the plug-in plate (1232) is slidingly arranged in the through holes, the inner side surface of the plug-in plate (1232) is fixedly connected with the air bag (1231), and the air bag (1231) can drive the plug-in plate (1232) to stretch out from the through holes.

7. A peelable shunt sheath for a ventriculocervical shunt according to claim 6, wherein: The cross section of the installation groove is in a mushroom-shaped structure, and the plug-in plate (1232) can be locked with the installation groove when it stretches out, so that the two tearable tubes (11) are tightly attached.

8. A peelable shunt sheath for a ventriculocervical shunt according to claim 7, wherein: The extraction unit (15) includes a connecting pipe (151), a mounting seat (152) and a locking seat (153), the arc-shaped channel is internally provided with the connecting pipe (151), the lower end of the connecting pipe (151) is connected with the connecting piece (12), the outer side of the tube seat (13) is installed with the mounting seat (152), the number of the mounting seat (152) is two, the two mounting seats (152) are respectively installed on the two tube seats (13), the locking seat (153) is sleeved on the connecting pipe (151), and the locking seat (153) is connected with the mounting seat (152) by thread cooperation.

9. A peelable shunt sheath for a ventriculocervical shunt according to claim 8, wherein: The connecting pipe (151) is provided with a limiting ring (154), and pull frames (155) are installed on both sides of the locking seat (153).

10. A peelable shunt sheath for a ventriculocervical shunt according to claim 9, wherein: The connecting pipe (151) is in a hollow structure, the inside of the connecting pipe (151) is communicated with the first cavity (1211), pipe guides (1511) are installed on both sides of the end of the connecting pipe (151), and the pipe guides (1511) are communicated with the inside of the second cavity (1221).

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