A device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling

Abstract

The present invention discloses a device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling, including a shunt. The shunt includes a drainage tube and an anchoring stent. The drainage tube includes a distal segment and a proximal segment. At least one inlet is provided in the distal segment, and the inlet is placed in the subarachnoid space. At least one outlet is provided in the proximal segment, and the outlet is placed in the venous system. The drainage tube is provided with at least one cavity communicating with the inlet and the outlet from the distal segment to the proximal segment. In the solution of the present invention, the distal part of the shunt tube does not have a self-expanding structural structure, which can reduce the volume of the product in the subarachnoid space, thereby reducing the risks of surgical operation and product damage to the central nervous system. Moreover, the anchoring stent will not shorten during the release process, which helps for precise release. At the same time, the device can be recycled during the release process, and is convenient for recycling after release, improving the utilization rate of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a device for percutaneous interventional treatment of hydrocephalus that is convenient for recycling. Background Art

[0002] Hydrocephalus refers to the abnormal accumulation of cerebrospinal fluid in the intracranial subarachnoid space or cerebral ventricle, causing part or all of it to expand abnormally, which is called hydrocephalus. The causes of hydrocephalus can be caused by cerebrospinal fluid circulation disorders, cerebrospinal fluid absorption disorders, excessive cerebrospinal fluid secretion, and brain parenchymal atrophy, etc. For hydrocephalus, the main treatment method is surgery, aiming to drain the excess cerebrospinal fluid. Specifically, it includes shunt surgery and third ventricle floor fenestration.

[0003] As the currently preferred treatment method, shunt surgery is divided into ventriculoperitoneal shunt and atrial shunt. The cerebrospinal fluid is drained out of the subarachnoid space through a shunt tube and absorbed naturally by the human body. The advantage is that there is an adjustable pressure shunt pump. After the operation, the drainage volume can be adjusted by adjusting the pressure of the shunt pump to avoid over-drainage causing low intracranial pressure or even bleeding. However, it is prone to complications such as infection and tube blockage, and patients may experience multiple catheter implantations and shunt tube adjustment surgeries in their lifetime.

[0004] The cerebrospinal fluid circulation constructed by the third ventricle floor fenestration is closer to the physiological circulation, with advantages such as less trauma and shorter operation time. However, the patient selection is strict, mainly effective for obstructive hydrocephalus, and it is less clinically carried out.

[0005] In addition, Patent CN107148293B discloses an implantable shunt for treating hydrocephalus, including a cerebrospinal fluid (CSF) inlet opening and a self-expanding structure located at the distal part of the shunt, a CSF inlet opening and a one-way valve located at the proximal part of the shunt. The shunt is configured for implantation in a patient such that the one or more CSF inlet openings are disposed in the cerebellopontine (CP) angle cistern, the body of the shunt is disposed in the inferior petrosal sinus (IPS), and the proximal part of the shunt is disposed in or near the internal jugular vein (JV), such that CSF flows from the CP angle cistern to the JV via the lumen of the shunt. Through this shunt, it becomes possible to treat hydrocephalus that could only be effectively treated by open surgery in the past with a minimally invasive interventional method, reducing the risk of postoperative infection. The physiological regulation of the drainage volume is mainly carried out through the ventriculo-venous pressure difference, with a shorter travel distance, avoiding the occurrence of postoperative over-drainage. However, this solution has the following several disadvantages: the distal part has a structure that self-expands from a folded delivery configuration to an expanded deployment configuration, and the volume increases when the expanded deployment configuration expands in the subarachnoid space, increasing the risk of surgical operation and damage to the central nervous system by the product; at the same time, when it is necessary to recycle the instrument during the operation, it is easy to cause tearing of the dura mater at the puncture point, increasing the surgical risk; and the connection position between the implant and the delivery system is closer to the distal end of the drainage tube, and the delivery system may interfere with the drainage tube when withdrawn.

[0006] To address the above problems, we propose a device for percutaneous intervention in the treatment of hydrocephalus with a specially designed anchoring device. Summary of the Invention

[0007] Under physiological conditions, cerebrospinal fluid (CSF) is produced in the choroid plexus of the lateral ventricles, the third ventricle, and the fourth ventricle. Each ventricle is connected through the interventricular foramen and the cerebral aqueduct. CSF flows sequentially from the bilateral lateral ventricles to the third ventricle and the fourth ventricle, and finally enters the subarachnoid space. A part of it will circulate through the central canal of the spinal cord. Most of the CSF that enters the subarachnoid space circulates near the superior sagittal sinus and is absorbed through arachnoid granulations and arachnoid villi. After absorption, it enters the venous sinus and returns to the blood circulation. The intracranial venous sinus is a cavity formed by the folding and curling of the dura mater at specific anatomical sites, which collects intracranial blood and CSF and then drains into the jugular vein. The venous sinus is adjacent to the subarachnoid space. In the cranium, the subarachnoid space expands at the brain sulci, fissures, etc., and cisterns are formed where CSF accumulates. In particular, as Figure 26 shown, the inferior petrosal sinus (0002) is adjacent to the cerebellopontine angle cistern (0005). If the inferior petrosal sinus (0002) is punctured, breaking through the dura mater (0003) and the arachnoid (0004) to construct a stoma between the cerebellopontine angle cistern (0005) and the inferior petrosal sinus (0002), CSF will be able to drain from the subarachnoid space to the venous sinus, flow to the jugular vein (0001) and then to the heart to participate in the blood circulation. In addition, in other similar anatomical structures, such as the transverse-sigmoid sinus (0007) being adjacent to the cerebellomedullary cistern, they can all be used as puncture and implantation points.

[0008] The object of the present invention is to provide a device that can be used for percutaneous intervention in the treatment of hydrocephalus and is convenient for retrieval to solve the problems raised in the background art.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A device for percutaneous intervention in the treatment of hydrocephalus that is convenient for retrieval, comprising a shunt, and the shunt includes a drainage tube and an anchoring bracket;

[0011] The drainage tube includes a distal segment and a proximal segment. At least one inlet is provided in the distal segment, and the inlet is placed in the subarachnoid space. At least one outlet is provided in the proximal segment, and the outlet is placed in the venous system. The drainage tube is provided with at least one cavity communicating with the inlet and the outlet from the distal segment to the proximal segment;

[0012] The anchoring stent includes at least one long straight rod, a plurality of support structures and at least one connecting part. The long straight rod is parallel to the axis of the anchoring stent and extends from the proximal end of the anchoring stent to the distal end of the anchoring stent. The support structure is composed of at least one support rod or a combination of multiple support rods with the same extending direction and connected end to end. The support rod forms an acute angle with the long straight rod. The support structures are distributed on both sides of the long straight rod and are connected to the long straight rod at their proximal ends. The connecting part is a connecting member located on the anchoring stent, and the drainage tube is connected to the anchoring stent through the connecting part.

[0013] In the above-mentioned device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, the same number of support structures are connected to both sides of the long straight rod.

[0014] In the above-mentioned device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, the support structures on both sides of the long straight rod are in a mirror-symmetrical relationship, and two mutually symmetrical support structures together form a stent ring.

[0015] In the above-mentioned device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, on the same stent ring of the anchoring stent, the support structures on both sides of the long straight rod are connected at the distal end and form a peak.

[0016] In the above-mentioned device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, an additional connecting rod is provided on the anchoring stent and is connected to the distal ends of two support rods on the adjacent front and rear support structures.

[0017] In the above-mentioned device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, the additional connecting rod is parallel to the long straight rod on the anchoring stent.

[0018] In the above-mentioned device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, the additional connecting rods are connected end to end to form an additional long rod parallel to the long straight rod.

[0019] In the above-mentioned device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, extension rods are provided at both ends of the long straight rod of the anchoring stent.

[0020] In the above-mentioned device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, a first circular connecting part is provided at the proximal end of the anchoring stent to connect the drainage tube.

[0021] In the above-mentioned device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, a second circular connecting part is provided at the distal end of the anchoring stent to connect the drainage tube.

[0022] In the above-mentioned device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, a third circular connecting part is provided in the middle of the anchoring stent to connect the drainage tube.

[0023] In the above-described device for percutaneous interventional treatment of hydrocephalus that is convenient for recycling, the connecting portion includes an open-loop structure, a closed-loop structure, and combinations thereof.

[0024] In the above-described device for percutaneous interventional treatment of hydrocephalus that is convenient for recycling, a delivery connecting portion for connecting with a delivery instrument is provided at the proximal end of the anchoring stent.

[0025] In the above-described device for percutaneous interventional treatment of hydrocephalus that is convenient for recycling, imaging materials are provided at the outflow port and the inflow port.

[0026] In the above-described device for percutaneous interventional treatment of hydrocephalus that is convenient for recycling, imaging materials are provided at the distal end of the anchoring stent.

[0027] In the above-described device for percutaneous interventional treatment of hydrocephalus that is convenient for recycling, the anchoring stent is made of a biocompatible material with superelasticity, such as nitinol alloy and biodegradable polymer materials.

[0028] In the above-described device for percutaneous interventional treatment of hydrocephalus that is convenient for recycling, the drainage tube is made of a polymer tube material with flexibility.

[0029] In the above-described device for percutaneous interventional treatment of hydrocephalus that is convenient for recycling, a one-way valve is provided on the drainage tube.

[0030] In the above-described device for percutaneous interventional treatment of hydrocephalus that is convenient for recycling, anticoagulant coatings are provided on the inner and outer surfaces of the shunt.

[0031] The present invention has the following advantages:

[0032] The present invention can perform venous sinus puncture through a catheter delivery device into the subarachnoid space within the cranial cavity at an appropriate anatomical position without damaging the brain, and then deliver a device that can achieve unidirectional drainage, enabling the treatment of hydrocephalus using an interventional method. Since it does not involve open surgical operations, the trauma during the operation is reduced, the operation time is saved, and the possibility of postoperative infection is greatly reduced. Because the travel distance is short, it can also avoid the pressure fluctuations caused by the change of the patient's body position after implantation. Moreover, the cerebrospinal fluid drainage volume is dynamically adjusted by the subdural pressure - venous sinus pressure difference where the shunt device is located, simulating the cerebrospinal fluid absorption under natural physiological conditions, and there will be no situation of excessive drainage after the operation.

[0033] Compared with the currently published devices for percutaneous interventional treatment of hydrocephalus, the present invention also has the following advantages:

[0034] 1. In the solution of the present invention, the distal part of the shunt tube does not expand from the folded delivery structure to the expanded deployment structure, which can reduce the volume of the product in the subarachnoid space, thereby reducing the risk of surgical operation and product damage to the central nervous system;

[0035] 2. In the solution of the present invention, a self-expanding stent is provided at the proximal section of the drainage tube for anchoring the drainage tube. This stent makes the connection position between the implant and the delivery system closer to the proximal end of the drainage tube, ensuring that the drainage device can be retrieved more easily and safely when the implantation position is not ideal and reducing the interference between the delivery system and the drainage tube when the delivery system is withdrawn;

[0036] 3. The anchoring stent of the present invention will not shorten during the release process, which helps to accurately release. At the same time, the release process can be retrieved, and the utilization rate of the retrieval lifting device is convenient after release. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is the front view of the shunt device described in the first embodiment of the present invention;

[0038] Figure 2 It is the 3D view of the anchoring stent of the shunt device described in the first embodiment of the present invention;

[0039] Figure 3 It is the plane development view of the main structural part of the anchoring stent of the shunt device described in the first embodiment of the present invention;

[0040] Figure 4 It is the front view of the improved shunt device described in the first embodiment of the present invention;

[0041] Figure 5 It is the 3D view of the anchoring stent of the improved shunt device described in the first embodiment of the present invention;

[0042] Figure 6 It is the plane development view of the main structural part of the anchoring stent of the improved shunt device described in the first embodiment of the present invention;

[0043] Figure 7 It is the front view of the shunt device described in the second embodiment of the present invention;

[0044] Figure 8 It is the 3D view of the anchoring stent of the shunt device described in the second embodiment of the present invention;

[0045] Figure 9 It is the plane development view of the main structural part of the anchoring stent of the shunt device described in the second embodiment of the present invention;

[0046] Figure 10 It is the front view of the alternative shunt device described in the second embodiment of the present invention;

[0047] Figure 113D drawing of the anchoring bracket of the alternative diverter described in Embodiment 2 of the present invention;

[0048] Figure 12 Planar development diagram of the main structural part of the anchoring bracket of the alternative diverter described in Embodiment 2 of the present invention

[0049] Figure 13 Front view of the diverter described in Embodiment 3 of the present invention;

[0050] Figure 14 3D drawing of the anchoring bracket of the diverter described in Embodiment 3 of the present invention;

[0051] Figure 15 Planar development diagram of the main structural part of the anchoring bracket of the diverter described in Embodiment 3 of the present invention;

[0052] Figure 16 Front view of the improved diverter described in Embodiment 3 of the present invention;

[0053] Figure 17 3D drawing of the anchoring bracket of the improved diverter described in Embodiment 3 of the present invention;

[0054] Figure 18 Front view of the diverter described in Embodiment 4 of the present invention;

[0055] Figure 19 3D drawing of the anchoring bracket of the diverter described in Embodiment 4 of the present invention;

[0056] Figure 20 Planar development diagram of the main structural part of the anchoring bracket of the diverter described in Embodiment 4 of the present invention;

[0057] Figure 21 Front view of the improved diverter described in Embodiment 4 of the present invention;

[0058] Figure 22 3D drawing of the anchoring bracket of the improved diverter described in Embodiment 4 of the present invention;

[0059] Figure 23 Front view of the diverter described in Embodiment 5 of the present invention;

[0060] Figure 24 3D drawing of the anchoring bracket of the diverter described in Embodiment 5 of the present invention;

[0061] Figure 25 Planar development diagram of the main structural part of the anchoring bracket of the diverter described in Embodiment 5 of the present invention;

[0062] Such as Figure 26 Partial anatomical schematic diagram of the inferior petrosal sinus and the cerebellopontine angle cistern.

[0063] In the figure: 1000 shunt tube, 1100 drainage tube, 1110 distal segment, 1120 proximal segment, 1111 inlet, 1121 outlet, 1200 anchoring stent, 12001 stent unit, 1210 long straight rod, 1211 distal extension rod, 1212 proximal extension rod, 1213 hypotube extension structure, 1219 hanging buckle, 1220 support structure, 12201 double-rod support structure, 12202 short-rod support structure, 12203 long-rod support structure, 1221 first node, 1222 first support rod, 12221 short support rod, 12222 long support rod, 1223 second support rod, 1224 second node, 1225 additional auxiliary rod, 1226 additional long rod, 1227 additional connecting rod, 1228 wave crest, 1229 corrugated ring, 1230 first circular ring connection part, 1231 first cavity, 1238 card slot, 1240 second circular ring connection part, 1241 second cavity, 1250 third circular ring connection part, 1261 first radiopaque point, 1262 radiopaque ring, 1263 second radiopaque point, 1264 third radiopaque point. Detailed implementation manner

[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are only for illustrative purposes and do not intend to limit the scope of the present invention.

[0065] Embodiment 1

[0066] Refer to Figures 1 - 3 , a device for percutaneous interventional treatment of hydrocephalus that is easy to recycle, including a shunt 1000 for treating hydrocephalus implanted in the subarachnoid space and the venous system, including a drainage tube 1100 and an anchoring stent 1200. The drainage tube 1100 is made of a flexible elastic polymer material with good biocompatibility (such as TPU, silicone, etc.). The anchoring stent 1200 is made of a superelastic biocompatible material, which is a nickel-titanium shape memory alloy. An anticoagulant coating is provided on the inner and outer surfaces of the shunt 1000.

[0067] Such as Figure 1As shown in the figure, the drainage tube 1100 includes a distal segment 1110 and a proximal segment 1120. The anchoring stent 1200 is disposed on the proximal segment 1120 of the shunt to anchor the shunt 1000 in the venous sinus. The drainage tube 1100 is located in the inner cavity of the anchoring stent 1200. The distal portion 1110 is provided with an inlet 1111 and is placed in the subarachnoid space. The proximal segment 1120 is provided with an outlet 1121 and is placed in the venous system (including the venous sinus, venous blood vessels, etc.). The drainage tube further includes a cavity communicating with the inlet 1111 and the outlet 1121. When the shunt 1000 works, cerebrospinal fluid enters the drainage tube 1100 through the inlet 1111, then flows out to the venous blood system through the cavity and the outlet 1121, realizing cerebrospinal fluid shunting.

[0068] The anchoring stent 1200 is configured in a compressed form in the delivery state and an expanded form in the released state. As Figure 2 shown, the expanded form of the anchoring stent 1200 in the released state is shown. The anchoring stent includes a long straight rod 1210, six support structures 1220, and a first circular ring connecting portion 1230. As Figure 2 and 3 shown, the long straight rod 1210 is substantially parallel to the axis of the anchoring stent 1200 and extends from the proximal end to the distal end of the anchoring stent 1200. The support structure 1220 is connected to the long straight rod 1210 at the connection point 1221 at the proximal end. The support structure 1220 is composed of a first support rod 1222. The first support rod 1222 forms a certain acute angle with the long straight rod 1210 and extends towards the cylindrical surface of the anchoring stent 1200. The support structures 1220 are distributed on both sides of the long straight rod 1210 and have the same number. During the process of retracting into the sheath tube, the long straight rod 1210 pulls the first support rod 1222 into the sheath tube with a smaller diameter through the connection point 1221 with the first support rod 1222.

[0069] As Figure 2 shown, a circular first circular ring connecting portion 1230 is provided at the proximal end of the long straight rod 1210, including a first cavity 1231 for connecting with the drainage tube 1100. After the anchoring stent 1200 is released, it is located at the proximal segment of the drainage tube 1100, so that the anchoring stent 1200 is located in the venous system after implantation.

[0070] As Figures 4 - 6As shown, as an improvement of the first embodiment, the support structures 1220 on both sides of the long straight rod 1210 are in a mirror-symmetrical relationship. Two mutually symmetrical support structures 1220 form a corrugated ring 1229. The distal ends of the first support rods 1222 of the same corrugated ring 1229 are connected to each other to form a peak structure 1228 facing the distal end. Adjacent two peaks 1228 are connected by an additional connecting rod 1227. The two additional connecting rods 1227 are substantially parallel to the long straight rod 1210 and are connected to each other to form an additional long rod 1226. The additional connecting rod 1227 is pulled into a sheath tube with a smaller diameter (0.5 - 1.5 mm) at the distal end of the first support rod 1222.

[0071] Furthermore, a distal extension rod 1211 is provided at the distal end of the long straight rod 1210. A second circular connection part 1240 is also provided at the distal end of the distal extension rod 1211, including a second cavity 1241 for connecting with the distal section 1110 of the drainage tube 1100, which can better anchor the distal position of the drainage tube 1100 and ensure that it is located in the cerebrospinal fluid environment of the subarachnoid space.

[0072] In this improved solution, at the peak 1228 at the farthest end of the stent, a first imaging point 1261 is provided to show the position of the stent during the operation, facilitating the surgical operation. A one-way valve is provided on the distal section 1110 of the drainage tube 1100, which only allows cerebrospinal fluid to flow unidirectionally from the subarachnoid space to venous blood.

[0073] Embodiment Two

[0074] As Figure 7 shown, the difference between this embodiment and the first embodiment lies in the structural design of the imaging ring 1262 provided at the distal end of the drainage tube and the anchoring stent 1200.

[0075] The anchoring stent 1200 is constructed in a compressed form in the delivery state and an expanded form in the released state. As Figure 8 and 9 shown, it is the expanded form of the anchoring stent 1200 in the released state. The anchoring stent 1200 includes a long straight rod 1210, six support structures 1220 and a second circular connection part 1240. As Figure 8As shown, the long straight rod 1210 is substantially parallel to the axis of the anchoring bracket 1200 and extends from the proximal end of the anchoring bracket 1200 to the distal end of the anchoring bracket 1200. The support structure 1220 is composed of two support rods, including a first support rod 1222 at the proximal end and a second support rod 1223 at the distal end. The distal end of the first support rod 1222 is connected to the proximal end of the second support rod 1223 at the second node 1224. The two first support rods 1222 in the same group are both at a certain acute angle with the long straight rod 1210 and extend in the same direction on a cylindrical surface with a diameter of about 3 - 6 mm.

[0076] The proximal end of the first support rod 1222 is connected to the long straight rod 1210 at the first node 1221. The support structures 1220 on both sides of the long straight rod 1210 are substantially mirror-symmetrical about the long straight rod 1210. Two mutually symmetrical support structures 1220 form a corrugated ring 1229. The distal ends of two adjacent second support rods 1223 on the same side of the long straight rod 1210 are connected by an additional connecting rod 1227. The two additional connecting rods 1227 on both sides of the long straight rod 1210 are substantially parallel to the long straight rod 1210 and are connected to each other to form an additional long rod 1226. Therefore, in this embodiment, the anchoring bracket 1200 is an open-loop structure. Two adjacent second nodes 1224 on the same side of the long straight rod 1210 are connected by an additional auxiliary rod 1225, which improves the stability and supporting force of the bracket.

[0077] During the process of entering the sheath tube, the support structure 1220 is pulled into the sheath tube with a smaller diameter through the long straight rod 1210, and the additional auxiliary rod 1225 and the additional connecting rod 1227 are respectively pulled into the sheath tube with a smaller diameter under the traction of the distal ends of the first support rod 1222 and the second support rod 1223.

[0078] A distal extension rod 1211 is also provided at the distal end of the long straight rod 1210. A second circular ring connecting portion 1240 is designed at the distal end of the distal extension rod 1211, including a cavity 1241 for connecting with the distal segment 1110 on the drainage tube 1100 to better anchor the distal position of the drainage tube 1100 and ensure that it is in the cerebrospinal fluid environment of the subarachnoid space. At the same time, the anchoring bracket 1200 is arranged at the proximal segment of the drainage tube 1100 after release, so that the bracket 1200 is located in the venous system after implantation. A buckle 1219 detachably connected to the delivery system is designed at the proximal end of the long straight rod 1210.

[0079] As Figure 10 shown, another implementation manner of the second embodiment is as Figure 11 and 12As shown, in this alternative solution, the distal ends of the second support rods 1223 in the same waveform loop 1229 are connected to each other to form a wave crest 1228 facing the distal end. Adjacent wave crests 1228 are connected by additional connecting rods 1227. The two additional connecting rods 1227 are substantially parallel to the long straight rod 1210 and are connected to each other to form an additional long rod 1226. Therefore, in this embodiment, the anchoring bracket is a closed-loop structure. In addition, on the releasable buckle 1219, a second radiopaque point 1263 is provided to facilitate observing the position of the proximal end of the bracket during the operation and confirming whether the buckle 1219 is successfully released.

[0080] Embodiment 3

[0081] As Figure 13 shown, the difference between this embodiment and Embodiments 1 and 2 lies in the design of the anchoring bracket 1200. The anchoring bracket 1200 is configured in a compressed form in the delivery state and an expanded form in the released state, as Figure 14 and 15 shown as the expanded form of the bracket in the released state. The anchoring bracket 1200 includes a long straight rod 1210, six support structures 1220 and two connecting parts. As Figure 14 shown, the long straight rod 1210 is substantially parallel to the axis of the anchoring bracket 1200 and extends from the proximal end of the anchoring bracket 1200 to the distal end of the anchoring bracket 1200.

[0082] The support structures 1220 are divided into two types, including four proximal support structures 1220 and two distal support structures 1220. Among them, the four proximal support structures 1220 include a first support rod 1222 at the proximal end and a second support rod 1223 at the distal end. The distal end of the first support rod 1222 is connected to the proximal end of the second support rod 1223 at the second node 1224. The two support rods 1222 and 1223 in the same group are both at a certain acute angle with the long straight rod 1210 and extend in the same direction on a cylindrical surface with a diameter of about 3-6 mm. The longitudinally adjacent two nodes 1224 are connected by an additional auxiliary rod 1225, which improves the stability and supporting force of the anchoring bracket 1200. The proximal end of the first support rod 1222 is connected to the long straight rod 1210 at the first node 1221. The support structures 1220 on both sides of the long straight rod 1210 are substantially mirror-symmetrical about the long straight rod 1210, and the two mutually symmetrical support structures 1220 form a waveform loop 1229. The distal ends of the second support rods 1223 in the same waveform loop 1229 are connected to each other to form a wave crest 1228 facing the distal end.

[0083] The two distal support structures 1220 are composed of a first support rod 1222, and the length is roughly equal to the first support rod 1222 in the proximal support structure 1220, and forms a certain acute angle relationship with the long straight rod 1210. The proximal end of the first support rod 1222 is connected to the long straight rod 1210 at the node 1221, and the distal end of the first support rod 1222 is connected to the adjacent second node 1224 through an additional auxiliary rod 1225, thereby improving the stability and support force of the distal end of the anchor bracket 1200.

[0084] During the process of retracting the sheath, the support structure 1220 is pulled into the sheath with a smaller diameter through the long straight rod 1210 , and the additional auxiliary rod 1225 is pulled into the sheath with a smaller diameter under the traction of the distal end of the first support rod 1222 .

[0085] The proximal end of the long straight rod 1210 is also provided with a proximal extension rod 1212, and the proximal end of the proximal extension rod 1212 is provided with a first circular connecting portion 1230, including a first cavity 1231 for connecting with the proximal end of the drainage tube 1100. At the same time, the distal end of the long straight rod is also provided with a distal extension rod 1211, and the distal end of the distal extension rod 1211 is provided with a second circular connecting portion 1240, including a second cavity 1241, for connecting with the distal end of the drainage tube 1100, which can better anchor the position of the distal end 1110 of the drainage tube 1100 to ensure that it is located in the cerebrospinal fluid environment of the subarachnoid space. After release, the anchoring bracket 1200 is located in the middle section or proximal part of the drainage tube 1100, so that the anchoring bracket 1200 is located in the venous system after implantation.

[0086] A slot 1238 for detachably connecting to the delivery system is provided at the proximal end of the first annular connecting portion 1230 .

[0087] As Figure 16 and 17 As shown, as an improvement to the third embodiment, a hypotube extension structure 1213 is provided at the proximal end of the long straight rod 1210. The proximal end of the hypotube extension structure 1213 is approximately adjacent to the drainage outlet 1121, protecting the drainage tube 1100 from bending. Three slots 1238 are designed at the proximal end of the hypotube extension structure 1213, which can be detachably connected to the delivery system. Furthermore, a third imaging point 1264 is provided between any two slots 1238 to indicate the location of the drainage outlet 1121 during surgery.

[0088] Embodiment 4

[0089] like Figure 18 As shown, the difference between this embodiment and the above embodiment lies in the design of the anchoring stent 1200. The anchoring stent 1200 is constructed in a compressed state in the delivery state and an expanded state in the release state, as shown in FIG. Figure 19 and20 As shown, it is the expanded form of the anchoring stent 1200 in the released state. The anchoring stent 1200 includes a long straight rod 1210, eight support structures 1220 and three connecting parts. As Figure 19 shown, the long straight rod 1210 is substantially parallel to the axis of the anchoring stent 1200 and extends from the proximal end of the anchoring stent 1200 to the distal end of the anchoring stent 1200.

[0090] The support structures 1220 are divided into two types, including four double-rod support structures 12201 and four short single-rod support structures 12202. Two double-rod support structures 12201 and two short single-rod support structures 12202 form a stent unit 12001.

[0091] At the proximal end of the stent unit 12001 are two double-rod support structures 12201 that are symmetric about the long straight rod 1210. Each double-rod support structure 12201 includes a first support rod 1222 at the proximal end and a second support rod 1223 at the distal end, and the distal end of the first support rod 1222 is connected to the proximal end of the second support rod 1223 at the second node 1224. The two first support rods 1222 in the same group are both at a certain acute angle with the long straight rod 1210 and extend in the same direction on a cylindrical surface with a diameter of about 3 - 6 mm. The proximal end of the first support rod 1222 is connected to the long straight rod 1210 at the first node 1221. Two relatively symmetric double-rod support structures 12201 form a waveform ring 1229. The distal ends of the second support rods 1223 in the same waveform ring 1229 are connected to each other to form a wave crest structure 1228 facing the distal end.

[0092] The two short single-rod support structures 12202 at the distal end of the stent unit 12001 are composed of a short support rod 12221, and the length is substantially equal to that of the first support rod 1222 in the double-rod support structure 12201 and is at a certain acute angle with the long straight rod 1210. The proximal end of the short support rod 12221 of the single-rod support structure 12202 is connected to the long straight rod 1210 at the node 1221, and the distal end is connected to the second node 1224 of the proximal waveform ring 1229 through an additional auxiliary rod 1225, which improves the stability and supporting force of the anchoring stent 1200.

[0093] During the process of retracting into the sheath, the support structure 1220 is pulled into the sheath with a smaller diameter through the long straight rod 1210, and the additional auxiliary rod 1225 is pulled into the sheath with a smaller diameter under the traction of the distal end of the first support rod 1222. The long straight rods 1210 of the two stent units 12001 are connected end to end to form the overall structure of the anchoring stent 1200.

[0094] A proximal extension rod 1212 is provided on the proximal long straight rod 1210 of the anchoring stent 1200 structure. A first circular ring connection part 1230 is provided at the proximal end of the proximal extension rod 1212, including a cavity 1231 for connecting with the distal end of the drainage tube 1100. At the same time, a distal extension rod 1211 is provided on the distal long straight rod 1210 of the anchoring stent 1200 structure. A second circular ring connection part 1240 is provided at the distal end of the distal extension rod 1211, including a second cavity 1241 for connecting with the distal end of the drainage tube 1100, which can better anchor the distal position of the drainage tube 1100 and ensure that it is located in the cerebrospinal fluid environment of the subarachnoid space. A third circular ring connection part 1250 is provided at the connection of the long straight rod 1210 between the two stent units 12001 for connecting with the middle of the drainage tube 1100 and making the drainage tube 1100 close to the inner wall of the stent, reducing the influence of the drainage tube on blood flow. The anchoring stent 1200 is located in the middle section or proximal part of the drainage tube 1100 after release, so that the stent 1200 is located in the venous system after implantation.

[0095] As Figure 21 and 22 shown, as an improved implementation manner of the fourth embodiment, an additional connecting rod 1227 is provided between the two distal peaks 1228 of the two stent units 12001 to improve the stability and support of the stent. At the same time, the third circular ring connection part 1250 is set as an open circular ring shape.

[0096] Embodiment Five

[0097] As Figure 23 shown, the difference between the fifth embodiment and the above embodiments lies in the design of the anchoring stent. The anchoring stent 1200 is configured in a compressed form in the delivery state and an expanded form in the released state. As Figure 24 and 25 shown, it is the expanded form of the anchoring stent 1200 in the released state. The anchoring stent 1200 includes a long straight rod 1210, ten support structures 1220 and two connection parts 1230, 1240. As Figure 24 shown, the long straight rod 1210 is substantially parallel to the axis of the anchoring stent 1200 and extends from the proximal end to the distal end of the anchoring stent 1200.

[0098] The support structures 1220 are divided into three types, including six long single-rod support structures 12203, two double-rod support structures 12201 and two short single-rod support structures 12202.

[0099] The proximal end of the anchoring bracket 1200 is provided with six long single-rod support structures 12203 that are symmetric about the long straight rod 1210. Each long single-rod support structure 12203 includes a long support rod 12222. The long support rod 12222 is connected to the long straight rod 1210 at the first node 1221, forms a certain acute angle with the long straight rod 1210, and extends in the same direction on a cylindrical surface with a diameter of about 3 - 6 mm. Two symmetric long single-rod support structures 12203 form a corrugated loop 1229. The distal ends of the long support rods 12222 in the same corrugated loop 1229 are connected to each other to form a peak structure 1228 facing the distal end.

[0100] The middle of the anchoring bracket 1200 is provided with two double-rod support structures 12201 that are symmetric about the long straight rod 1210. Each double-rod support structure 12201 includes a first support rod 1222 and a second support rod 1223 at the distal end. The proximal end of the first support rod 1222 is connected to the long straight rod 1210 at the first node 1221. The distal end of the first support rod 1222 is connected to the proximal end of the second support rod 1223 at the second node 1224. The two first support rods 1222 and the second support rods 1223 in the same group are both at a certain acute angle with the long straight rod 1210 and extend in the same direction on a cylindrical surface with a diameter of about 3 - 6 mm. Two symmetric double-rod support structures 12201 form a corrugated loop 1229. The distal ends of the second support rods 1223 in the same corrugated loop 1229 are connected to each other to form a peak structure 1228 facing the distal end.

[0101] The two short single-rod support structures 12202 at the distal end of the anchoring bracket 1200 are composed of a short support rod 12221, whose length is approximately half of that of the long support rod 12222 and is roughly equal to the first support rod 1222 in the double-rod support structure 12201. Similarly, the short support rod 12221 at the distal end forms a certain acute angle with the long straight rod 1210. The proximal end of the short support rod 12221 is connected to the long straight rod 1210 at the first node 1221. The distal end of the short support rod 12221 is connected to the second node 1224 of the corrugated loop 1229 on the adjacent double-rod support structure 12201 through an additional auxiliary rod 1225, which improves the stability and supporting force at the distal end of the anchoring bracket 1200. The adjacent two peaks 1228 are connected through an additional connecting rod 1227. The additional connecting rod 1227 is roughly parallel to the long straight rod 1210 and is connected to each other to form an additional long rod 1226.

[0102] During the sheath insertion process, the long straight rod 1210 pulls the two-side support structures 1220 group into the sheath tube with a smaller diameter through the connection points. The additional auxiliary rod 1225 and the additional connecting rod 1227 are respectively pulled into the sheath tube with a smaller diameter under the traction of the first support rod 1222 and the long support rod 12222.

[0103] A proximal extension rod 1212 is also provided at the proximal end of the long straight rod 1210. A first circular ring connecting portion 1230 is provided at the proximal end of the proximal extension rod 1212, including a first cavity 1231 for connecting to the proximal end of the drainage tube 1100. Three buckles 1219 detachably connected to the delivery system are provided at the proximal end of the first circular ring connecting portion 1230. The buckles 1219 naturally expand outwards in a non-loaded state, so as to facilitate the smooth detachment of the anchoring stent 1200 from the delivery device. At the same time, a distal extension rod 1211 is provided on the long straight rod 1210 at the distal end of the structure of the anchoring stent 1200. A second circular ring connecting portion 1240 is provided at the distal end of the distal extension rod 1211, including a second cavity 1241 for connecting to the distal end of the drainage tube 1100, which can better anchor the distal position of the drainage tube 1100 and ensure that it is located in the cerebrospinal fluid environment of the subarachnoid space.

[0104] As described above, only the preferred specific embodiments of the present invention are given, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A percutaneous intervention device for treating hydrocephalus that is convenient for recycling, comprising a shunt (1000), characterized in that, The shunt includes a drainage tube (1100) and an anchoring stent (1200); The drainage tube (1100) includes a distal segment (1110) and a proximal segment (1120). At least one inlet (1111) is provided in the distal segment (1110), and the inlet (1111) is placed in the subarachnoid space. At least one outlet (1121) is provided in the proximal segment (1120), and the outlet (1121) is placed in the venous system. The drainage tube (1100) is provided with at least one channel communicating with the inlet (1111) and the outlet (1121) from the distal segment (1110) to the proximal segment (1120); The anchoring stent (1200) includes at least one long straight rod (1210), a plurality of support structures (1220) and at least one connecting portion. The long straight rod (1210) is parallel to the axis of the anchoring stent (1200) and extends from the proximal end of the anchoring stent (1200) to the distal end of the anchoring stent (1200). The support structure (1220) is composed of a plurality of support rods with the same extending direction and connected end to end. The support rods form an acute angle with the long straight rod (1210) and extend towards the cylindrical surface of the anchoring stent (1200). The support structures (1220) are distributed on both sides of the long straight rod, and the support structure (1220) is connected to the long straight rod (1210) at its proximal end. The connecting portion is a connecting member located on the long straight rod (1210) or an extended portion of the long straight rod (1210). The drainage tube (1100) is connected to the anchoring stent (1200) through the connecting portion; An additional connecting rod (1227) is provided on the anchoring stent (1200) and is connected to the distal ends of the support rods on the support structures (1220) adjacent to the front and back. The additional connecting rod (1227) is substantially parallel to the long straight rod (1210) on the anchoring stent (1200). The additional connecting rods (1227) are connected end to end to form an additional long rod (1226) parallel to the long straight rod (1210).

2. The device for percutaneous intervention in the treatment of hydrocephalus that is easy to recycle according to claim 1, wherein The same number of support structures (1220) are connected to both sides of the long straight rod (1210).

3. The percutaneous interventional therapy device for hydrocephalus that is convenient for recycling according to claim 1, wherein The support structures (1220) on both sides of the long straight rod (1210) are in a mirror symmetry relationship, and two mutually symmetric support structures (1220) together form a stent ring (1229).

4. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 3, wherein On the same stent ring (1229) of the anchoring stent (1200), the support structures (1220) on both sides of the long straight rod (1210) are connected at the distal end and form a peak (1228).

5. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 1, wherein, Extension rods are provided at both ends of the long straight rod (1210) of the anchoring stent (1200).

6. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 1, wherein, A first circular ring connecting portion (1230) is provided at the proximal end of the anchoring stent (1200) to connect the drainage tube (1100).

7. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 1, wherein, A second circular ring connecting portion (1240) is provided at the distal end of the anchoring stent (1200) to connect the drainage tube (1100).

8. A device for percutaneous intervention in the treatment of hydrocephalus that is easy to recycle, characterized in that, A third circular ring connecting portion (1250) is provided in the middle of the anchoring stent (1200) to connect the drainage tube (1100).

9. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 1, wherein, The connecting part includes an open-loop structure, a closed-loop structure, and combinations thereof.

10. The percutaneous interventional treatment device for hydrocephalus that is convenient for recycling according to claim 1, characterized in that, A delivery connecting part for connecting with a delivery instrument is arranged at the proximal end of the anchoring bracket (1200).

11. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 10, characterized in that, The delivery connecting part is a detachable connecting mechanism.

12. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 1, wherein A developing material is arranged at the inflow port (1111) and / or the outflow port (1121).

13. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 1, characterized in that, A developing material is arranged on the anchoring bracket (1200).

14. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 13, wherein, A developing material is arranged at the distal end of the anchoring bracket (1200).

15. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 1, wherein The anchoring bracket (1200) is made of a biocompatible material with superelasticity, and the biocompatible material is a nickel-titanium alloy or a biodegradable polymer material.

16. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 1, wherein, The drainage tube (1100) is made of a polymer tube material with flexibility.

17. The device for percutaneous intervention in the treatment of hydrocephalus that is easy to recycle according to claim 1, wherein, A one-way valve is arranged on the drainage tube (1100).

18. A device for percutaneous intervention in the treatment of hydrocephalus that is easy to recycle, as described in claim 17, characterized in that, The one-way valve is arranged in the distal section of the drainage tube (1100).

19. The device for percutaneous intervention in the treatment of hydrocephalus that is convenient for recycling according to claim 1, characterized in that, An anticoagulant coating is arranged on the inner and outer surfaces of the shunt (1000).

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