Coaxial catheter system for stent electrode implantation

Abstract

The utility model provides a coaxial catheter system for implanting a stent electrode, which comprises an outer tube body, an inner tube body, an inner tube body, an inner tube body, an inner tube body and an outer tube body, and is characterized in that the right end of the outer tube body is connected with an outer tube body tube seat; the right side of the middle tube body is connected with a middle tube body tube seat, and the left end of the middle tube body is connected with the outer tube body tube seat through an outer tube body rotary hemostasis valve; the right end of the inner tube body is connected with an inner tube body tube seat, the left end of the inner tube body is connected with a middle tube body tube seat through a middle tube body rotary hemostasis valve, and the right end of the inner tube body tube seat is connected with an inner tube body rotary hemostasis valve. According to the whole structure, flexibility and strength are balanced, operation performance is improved, strong supporting performance at the near end and excellent passing performance and supporting performance at the far end are achieved, a complex venous access can be safely and effectively navigated, and a support electrode is smoothly fed into the anterior superior sagittal sinus from the jugular vein.

Description

TECHNICAL FIELD

[0001] The utility model relates to coaxial catheter technical field, it is a kind of coaxial catheter system for stent electrode implantation. BACKGROUND

[0002] At present, brain-computer interface (BCI) signal acquisition technology mainly includes non-invasive non-implantation technology: such as electroencephalogram (EEG), magnetoencephalogram (MEG), functional near-infrared spectroscopy technology (fNIRS) and the like. Minimally invasive non-implantation technology: such as local skull electrophysiological modification technology (MILEM). Non-invasive intervention technology: such as nano probe, ear canal EEG and the like. Minimally invasive implantation technology: such as focused ultrasound imaging (FUS), subcutaneous electroencephalogram (sqEEG), cortical electrogram (ECoG) and the like. Invasive implantation technology: such as neural connection (Neuralink), neural dust, microelectrode array (MEAs), stereotactic electroencephalogram (sEEG) and the like. Among them, the neural signal quality collected by non-invasive technology is poor, and implantation technology may cause brain trauma and chronic tissue inflammation. Stentrode is a kind of micro neural interface combining stent and electrode, which is implanted by minimally invasive intervention technology, and is sent to and placed in superior sagittal sinus (SSS) near the brain through catheter from jugular vein. It has the following advantages, minimally invasive: Stentrode can enter the brain through blood vessels without craniotomy, thereby reducing the risk of operation and recovery time. Safety: preliminary studies show that Stentrode shows good safety in animal experiments, and the blood vessel remains open for more than 6 months after implantation. Signal quality: Stentrode can provide high signal-to-noise ratio and applicable signal bandwidth, and the recorded signal quality is equivalent to subcortical or epidural electrode, which is suitable for brain-machine interface (BMI). Diversified recording position: Stentrode can record in sulci, interhemispheric regions and deep brain areas, and can access some areas difficult to reach by traditional methods. Potential neuroregulation ability: Stentrode can stimulate motor cortex to produce gross movement and provide treatment options that may change life. Strong adaptability: the design of Stentrode enables it to adapt to different blood vessel shapes and sizes, increasing its flexibility in clinical application. These advantages make Stentrode have broad application prospects in the field of brain-computer interface and neuroregulation.

[0003] However, in the prior art, due to the complexity of the cerebral venous pathway, the traditional catheter is difficult to balance the support, flexibility and passability, and the stent electrode is sent into the superior sagittal sinus. UTILITY MODEL CONTENT

[0004] The utility model discloses in order to solve the technical problem that because cerebral vein access is complex, traditional catheter is difficult to give consideration to supportability, compliance and passability, and send the stent electrode into superior sagittal sinus, and provide a coaxial catheter system for stent electrode implantation.

[0005] The utility model discloses the following technical scheme solves above-mentioned technical problem:

[0006] The utility model provides a coaxial catheter system for stent electrode implantation, the coaxial catheter system for stent electrode implantation includes:

[0007] The outer pipe body right end is connected with outer pipe body pipe seat;

[0008] The intermediate pipe body right side is connected with intermediate pipe body pipe seat, and the intermediate pipe body left end is connected with the outer pipe body pipe seat through the outer pipe body rotation hemostat valve;

[0009] The inner pipe body right end is connected with inner pipe body pipe seat, and the inner pipe body left end is connected with the intermediate pipe body pipe seat through the intermediate pipe body rotation hemostat valve, and the inner pipe body pipe seat right end is connected with the inner pipe body rotation hemostat valve.

[0010] Further, the intermediate pipe body passes through the inner chamber of the outer pipe body and is connected through the outer pipe body rotation hemostat valve, the intermediate pipe body includes a second PTFE inner lining and a second developing mark ring, the outer side surface of the second PTFE inner lining is connected with the third braided tube inner wall through a first support spring, the outer side surface of the third braided tube is bonded with a fourth braided tube, the outer side surface of the fourth braided tube is bonded with a second nylon outer pipe, and the inner diameter of the intermediate pipe body is 1.7mm-1.8mm, which can be compatible with the inner pipe body with an outer diameter of 5F;

[0011] The wall thickness of the second PTFE inner lining of the intermediate pipe body is 0.0005-0.001 inch;

[0012] The first support spring is wound by a plurality of nickel-titanium wires, the wire diameter is 0.025-0.05mm, the strength is 2000-3000MPa, the winding gap is 0.01-0.05mm, and good supportability and compliance are achieved.

[0013] The third braided tube and the fourth braided tube are made of stainless steel, the thickness is 0.001 inch, and the width is 0.003 inch, so that strong supportability and stability are provided.

[0014] The grade of the second nylon outer pipe is TR90, the hardness is 60A, 70A, 80A, 35D, 40D, 55D, 63D and 72D respectively, the thickness is 0.025mm-0.075mm, and the second nylon outer pipe is laminated and hot combined with the PTFE inner lining through hot melting welding to form an integrated whole, so that the purpose of supporting, navigating and positioning is achieved.

[0015] Further, the inner tube body passes through the inner cavity of the intermediate tube body and is connected by the intermediate tube body rotation hemostasis valve, the inner tube body includes a third PTFE inner liner and a third developing mark ring, the inner tube body inner diameter is 1.4-1.5mm, used to deliver stent electrode, the third PTFE inner liner outside is connected with the fifth braided tube through the second support spring, the fifth braided tube outside surface is bonded with the sixth braided tube, the sixth braided tube outside surface is bonded with the third nylon outer tube, and the third nylon outer tube left end inner wall is provided with the third developing mark ring;

[0016] The fifth braided tube and the sixth braided tube are stainless steel materials, the thickness is 0.001 inch, and the width is 0.003 inch, so that stronger support and stability are provided.

[0017] The third PTFE inner liner wall thickness of the inner tube body is 0.0005-0.001 inch.

[0018] The second support spring is a plurality of nickel-titanium wire windings, the wire diameter is 0.025-0.05mm, the strength is 2000-3000MPa, the winding gap is 0.01-0.05mm, and good support and flexibility are provided.

[0019] Further, the outer tube body includes a first PTFE inner liner and a first developing mark ring, the inner cavity size of the outer tube body is 0.088 inch, can be compatible with the intermediate tube body with an outer diameter of 6F, the first PTFE inner liner outside surface is bonded with the first braided tube, the first braided tube outside surface is bonded with the second braided tube, the second braided tube outside surface is bonded with the first nylon outer tube, and the first nylon outer tube left end inner wall is fixedly installed with the first developing mark ring.

[0020] Further, the first developing mark ring, the second developing mark ring and the third developing mark ring are platinum alloy rings, in the inner tube middle layer, the size is wall thickness 0.025-0.05mm, the width is 0.5-1.0mm, and the configuration is a C-shaped ring or a circular ring, the first developing mark ring (14), the second developing mark ring and the third developing mark ring are used to be radiopaque under X-ray in the operation process, indicating the instrument head end position.

[0021] Further, the first PTFE inner liner wall thickness of the outer tube body is 0.0005-0.001 inch, the first braided tube is a stainless steel double round wire, the thickness is 0.0005 inch-0.001 inch, the width is 0.002-0.003 inch, and good support is provided.

[0022] Further, the second braided tube is a stainless steel double flat wire, the thickness is 0.0005 inch-0.001 inch, the width is 0.002-0.003 inch, and stronger support and stability are provided.

[0023] Further, the first nylon outer tube has a brand TR90, the hardness is 35D, 40D, 55D, 63D and 72D from the distal end to the proximal end, the thickness is 0.025mm-0.075mm, is laminated and hot combined into an integral whole through hot melting welding and the first PTFE inner lining, and serves the purpose of supporting navigation positioning.

[0024] Further, the third nylon outer tube has a brand TR90, the hardness is 60A, 70A, 80A, 35D, 40D, 55D, 63D and 72D, the thickness is 0.025mm-0.075mm, is laminated and hot combined into an integral whole through hot melting welding and the third PTFE inner lining, and serves the purpose of supporting navigation positioning, and is used for implanting the superior sagittal sinus stent electrode.

[0025] Further, the outer tube body surface is sleeved with a sealing bag, rubber rings are fixedly installed at two ends of the sealing bag, sealing plugs are clamped and connected in the rubber ring ports, a gas suction pipe is fixedly and communicatively connected to the top side of the right end of the sealing bag, a gas bag is fixedly and communicatively connected to the end of the gas suction pipe, a discharge pipe is fixedly and communicatively connected to the end of the gas bag, and a one-way valve is installed at the end of the discharge pipe.

[0026] On the basis of conforming to the common sense of the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, the preferred examples of the utility model are obtained.

[0027] The positive progress effect of the utility model lies in that:

[0028] The coaxial catheter system for stent electrode implantation adopts three specifications of outer tube body, middle tube body and inner tube body, realizes the optimization of the supporting force and flexibility of the catheter in different parts by adopting the combination of different materials and designs.

[0029] The distal end of the middle layer of the outer tube body adopts a stainless steel double-circular wire braided tube, and the proximal end adopts a double-braided structure of double-circular wire braided tube plus flat wire braided tube, which provides excellent flexibility and supporting force. The distal end double-circular wire braided tube has good flexibility, is suitable for curved blood vessels; the proximal end double-braided structure combines circular wire and flat wire, enhances the supporting property and pressure resistance, and improves the stability and anti-deformation ability of the catheter. The overall structure balances flexibility and strength, ensures that the catheter can be smoothly pushed in the complex blood vessels, and at the same time maintains a stable form.

[0030] The intermediate pipe body and the intermediate layer of the inner pipe body adopt multi-strand nickel titanium winding, the transition section adopts winding plus braiding structure, and the proximal end adopts a stainless steel double-braided pipe structure, so that the performance of the catheter can be optimized. The multi-strand nickel titanium winding of the distal end provides excellent flexibility and supporting force, and is suitable for blood vessel bending; the transition section combines winding and braiding to improve the stability and adaptability of the catheter; the stainless steel double-braided structure of the proximal end provides strong support and pressure resistance, ensures smooth advancement of the catheter in a complex blood vessel, balances flexibility and strength of the overall structure, improves operation performance, realizes strong support of the proximal end and excellent passability and supporting force of the distal end, and can safely and effectively navigate a complex venous pathway to smoothly send a stent electrode from a jugular vein into an anterior superior sagittal sinus;

[0031] By hand pinching the air bag, the gas in the sealing plug is extracted through the exhaust pipe under the action of the air bag, and then is discharged through the discharge pipe, so that the sealing bag seals and protects the coaxial catheter, realizes dustproof and protective setting, and meets the demand. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application.

[0033] Figure 1 It is a whole structure schematic diagram of the coaxial catheter system of the utility model.

[0034] Figure 2 It is a whole structure schematic diagram of the coaxial catheter system of the utility model. Figure 1 It is an axial half section structure schematic diagram of the outer pipe body and the inner pipe body of the utility model.

[0035] Figure 3 It is a whole structure schematic diagram of the coaxial catheter system of the utility model. Figure 1 It is an axial half section structure schematic diagram of the intermediate pipe body of the utility model.

[0036] Figure 4 It is a whole structure schematic diagram of the coaxial catheter system of the utility model. Figure 1 It is an axial half section structure schematic diagram of the inner pipe body of the utility model.

[0037] Figure 5 It is a connecting structure schematic diagram of the sealing bag, the outer pipe body, the intermediate pipe body and the inner pipe body of the coaxial catheter system of the utility model.

[0038] Figure 6 It is a surface three-dimensional structure schematic diagram of the sealing bag of the coaxial catheter system of the utility model.

[0039] Figure 7 It is a clinical embodiment schematic diagram of the coaxial catheter system of the utility model.

[0040] MARKS DESCRIPTION

[0041] 1 outer tube body; 2 outer tube body hub; 3 outer tube body rotation stop valve; 4 intermediate tube body; 5 intermediate tube body hub; 6 intermediate tube body rotation stop valve; 7 inner tube body; 8 inner tube body hub; 9 inner tube body rotation stop valve; 10 first PTFE inner liner; 11 first braided tube; 12 second braided tube; 13 first nylon outer tube; 14 first radiopaque marker ring; 15 second PTFE inner liner; 16 first support spring; 17 third braided tube; 18 fourth braided tube; 19 second nylon outer tube; 20 second radiopaque marker ring; 21 third PTFE inner liner; 22 second support spring; 23 fifth braided tube; 24 sixth braided tube; 25 third nylon outer tube; 26 third radiopaque marker ring; 27 sealed pouch; 28 rubber ring; 29 sealed plug; 30 air evacuation tube; 31 air bladder; 32 one-way valve; 33 drain tube. DETAILED DESCRIPTION

[0042] In order to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0043] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above-described accompanying drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0044] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0045] And, the above-mentioned partial terms can be used to represent other meanings in addition to the orientation or positional relationship, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0046] In addition, the terms "mount", "set", "provided with", "connected", "connected", "socketed" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0047] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0048] As shown in Figures 1-7 The coaxial catheter system for stent electrode implantation comprises:

[0049] An outer tube body 1 is connected with an outer tube body tube seat 2 at the right end;

[0050] An intermediate tube body 4 is connected with an intermediate tube body tube seat 5 at the right side, and the left end of the intermediate tube body 4 is connected with the outer tube body tube seat 2 through an outer tube body rotary hemostatic valve 3;

[0051] An inner tube body 7 is connected with an inner tube body tube seat 8 at the right end, and the left end of the inner tube body 7 is connected with the intermediate tube body tube seat 5 through an intermediate tube body rotary hemostatic valve 6, and the right end of the inner tube body tube seat 8 is connected with an inner tube body rotary hemostatic valve 9.

[0052] Three specifications of outer tube body 1, intermediate tube body 4 and inner tube body 7 are adopted, and by adopting different material and design combinations, the support force and flexibility of the catheter in different parts are optimized.

[0053] The middle layer of the outer tube body 1 adopts a stainless steel double-circular wire braided tube at the distal end, and a double-braided structure of a double-circular wire braided tube plus a flat wire braided tube at the proximal end, providing excellent flexibility and support. The double-circular wire braided tube at the distal end has good flexibility, suitable for curved blood vessels; the double-braided structure at the proximal end combines circular wire and flat wire, enhancing the support and pressure resistance, improving the stability and anti-deformation ability of the catheter. The overall structure balances flexibility and strength, ensuring that the catheter can smoothly advance in complex blood vessels while maintaining a stable shape.

[0054] The distal end of the intermediate tube body 4 and the intermediate layer of the inner tube body 7 adopts multi-strand nickel titanium winding, the transition section adopts winding plus braiding structure, and the proximal end adopts a stainless steel double-braided tube structure, which can optimize the performance of the catheter. The multi-strand nickel titanium winding at the distal end provides excellent flexibility and support, which is suitable for blood vessel bending; the transition section combines winding and braiding to improve the stability and adaptability of the catheter; the stainless steel double-braided structure at the proximal end provides strong support and pressure resistance, which ensures the smooth advancement of the catheter in complex blood vessels, and the overall structure balances flexibility and strength, improves operation performance, realizes strong support at the proximal end and excellent passability and support at the distal end, and can safely and effectively navigate complex venous pathways to smoothly send the stent electrode from the jugular vein into the anterior superior sagittal sinus.

[0055] The intermediate tube body 4 passes through the inner cavity of the outer tube body 1 and is connected by the outer tube body rotation stop valve 3, the intermediate tube body 4 includes a second PTFE inner liner 15 and a second developing mark ring 20, the outer surface of the second PTFE inner liner 15 is connected with the inner wall of a third braided tube 17 through a first support spring 16, the outer surface of the third braided tube 17 is bonded with a fourth braided tube 18, the outer surface of the fourth braided tube 18 is bonded with a second nylon outer tube 19, and the inner diameter of the intermediate tube body 4 is 1.7-1.8 mm, which can be compatible with the inner tube body 7 with an outer diameter of 5F;

[0056] The wall thickness of the second PTFE inner liner 15 of the intermediate tube body 4 is 0.0005-0.001 inch;

[0057] The first support spring 16 is a multi-strand nickel titanium wire winding, the wire diameter is 0.025-0.05 mm, the strength is 2000-3000 MPa, and the winding gap is 0.01-0.05 mm, which has good support and flexibility;

[0058] The third braided tube 17 and the fourth braided tube 18 are made of stainless steel, the thickness is 0.001 inch, and the width is 0.003 inch, which provides strong support and stability.

[0059] The second nylon outer tube 19 has a TR90 brand, the hardness is 60A, 70A, 80A, 35D, 40D, 55D, 63D, and 72D, respectively, the thickness is 0.025-0.075 mm, and it is hot melt welded and laminated with the PTFE inner liner to form an integrated whole to support navigation and positioning.

[0060] The inner tube body 7 passes through the inner cavity of the intermediate tube body 4 and is connected by the intermediate tube rotation hemostasis valve 6, the inner tube body 7 includes a third PTFE inner liner 21 and a third developing mark ring 26, the inner diameter of the inner tube body 7 is 1.4-1.5mm, which is used to deliver stent electrodes, the outer side of the third PTFE inner liner 21 is connected with the fifth braided tube 23 through the second supporting spring 22, the outer side surface of the fifth braided tube 23 is bonded with the sixth braided tube 24, and the outer side surface of the sixth braided tube 24 is bonded with the third nylon outer tube 25, and the third developing mark ring 26 is arranged on the left end inner wall of the third nylon outer tube 25;

[0061] The fifth braided tube 23 and the sixth braided tube 24 are made of stainless steel, have a thickness of 0.001 inch and a width of 0.003 inch, and provide strong support and stability.

[0062] The wall thickness of the third PTFE inner liner 21 of the inner tube body 7 is 0.0005-0.001 inch.

[0063] The second supporting spring 22 is wound by a plurality of nickel-titanium wires, has a wire diameter of 0.025-0.05mm, a strength of 2000-3000MPa, and a winding gap of 0.01-0.05mm, and has good support and flexibility.

[0064] The outer tube body 1 includes a first PTFE inner liner 10 and a first developing mark ring 14, the inner cavity size of the outer tube body 1 is 0.088 inch, which can be compatible with the intermediate tube body 4 with an outer diameter of 6F, the outer side surface of the first PTFE inner liner 10 is bonded with the first braided tube 11, the outer side surface of the first braided tube 11 is bonded with the second braided tube 12, the outer side surface of the second braided tube 12 is bonded with the first nylon outer tube 13, and the first developing mark ring 14 is fixedly installed on the left end inner wall of the first nylon outer tube 13.

[0065] The first developing mark ring 14, the second developing mark ring 20 and the third developing mark ring 26 are platinum alloy rings, are arranged in the inner tube intermediate layer, have a wall thickness of 0.025-0.05mm and a width of 0.5-1.0mm, have a C-shaped ring configuration or a circular ring configuration, and are used to be radiopaque under X-ray in a surgical process, and indicate the position of the head end of an instrument.

[0066] The wall thickness of the first PTFE inner liner 10 of the outer tube body 1 is 0.0005-0.001 inch, the first braided tube 11 is a stainless steel double circular wire, has a thickness of 0.0005 inch-0.001 inch and a width of 0.002-0.003 inch, and provides good support.

[0067] The second braided tube 12 is a stainless steel double flat wire with a thickness of 0.0005-0.001 inch and a width of 0.002-0.003 inch, providing strong support and stability.

[0068] The first nylon outer tube 13 has a grade of TR90, a hardness of 35D, 40D, 55D, 63D and 72D from the distal end to the proximal end, and a thickness of 0.025-0.075 mm, and is laminated and thermally bonded with the first PTFE inner liner 10 to form an integrated whole, serving the purpose of supporting navigation and positioning.

[0069] The third nylon outer tube 25 has a grade of TR90, a hardness of 60A, 70A, 80A, 35D, 40D, 55D, 63D and 72D, and a thickness of 0.025-0.075 mm, and is laminated and thermally bonded with the third PTFE inner liner 21 to form an integrated whole, serving the purpose of supporting navigation and positioning, and being used for implanting the superior sagittal sinus stent electrode.

[0070] The outer tube body 1 is sleeved with a sealing bag 27, rubber rings 28 are fixedly installed at both ends of the sealing bag 27, sealing plugs 29 are clamped and connected in the ports of the rubber rings 28, a gas extraction pipe 30 is fixedly communicated with the top side of the right end of the sealing bag 27, an air bag 31 is fixedly communicated with the tail end of the gas extraction pipe 30, a discharge pipe 33 is fixedly communicated with the tail end of the air bag 31, and a one-way valve 32 is installed at the tail end of the discharge pipe 33.

[0071] The coaxial catheter is placed in the sealing bag 27, the two ends of the sealing bag 27 are sealed through the sealing plugs 29, the gas in the sealing plugs 29 is extracted through the gas extraction pipe 30 under the action of the air bag 31, and then is discharged through the discharge pipe 33, so that the sealing bag 27 seals and protects the coaxial catheter, realizes dustproof protection, and meets the demand.

[0072] Clinical operation of the embodiment:

[0073] The embodiment is shown in the drawings Figure 7

[0074] (1) Before the catheter is inserted, the sheep is completely shaved and the head size is recorded, and general anesthesia is used, and the induction agent is thiopental sodium, and isoflurane is used for maintaining anesthesia;

[0075] (2) Exposure of the jugular vein: first, the common jugular vein is exposed by surgical incision through the neck, and the incision position is about one-third distance from the mandibular angle;

[0076] (3) Catheterization: A suture is placed on the common carotid vein, a puncture is made with an 18-gauge needle, a non-traumatic J-shaped guide wire with an inner diameter of 0.035 inches is inserted into the common carotid vein, and an outer tube body 1 is introduced thereon, passing through the junction of the common carotid vein and the internal jugular vein and being fixed;

[0077] (4) Anticoagulant therapy: After puncture, 150 units / kg of intravenous heparin is administered, and activated clotting time (ACT) is measured every half hour to ensure that it is maintained above 250 seconds;

[0078] (5) Digital subtraction venography: Digital subtraction venography and road mapping of the venous system are performed using a mobile C-arm, and the contrast agent is injected after being diluted 1:1 with normal saline;

[0079] (6) Intermediate tube body introduction: The intermediate tube body 4 is introduced and passes through the torcular Herophili to prevent the catheter from pressing the posterior wall and hooking into the inferior sagittal sinus;

[0080] (7) Inner tube body introduction: The inner tube body 7 is introduced and enters the target position in the superior sagittal sinus.

[0081] The utility model is not limited to the above-mentioned embodiments, and any changes in shape or structure fall within the protection scope of the utility model. The protection scope of the utility model is defined by the appended claims, and those skilled in the art can make various changes or modifications to the embodiments without departing from the principles and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A coaxial catheter system for stent electrode implantation, characterized by, The coaxial catheter system for stent electrode implantation comprises: An outer tube body (1) connected with an outer tube body tube seat (2) at the right end; An intermediate tube body (4) connected with an intermediate tube body tube seat (5) at the right side, and connected between the left end of the intermediate tube body (4) and the outer tube body tube seat (2) through an outer tube body rotating hemostatic valve (3); An inner tube body (7) connected with an inner tube body tube seat (8) at the right end, and connected between the left end of the inner tube body (7) and the intermediate tube body tube seat (5) through an intermediate tube body rotating hemostatic valve (6), and the inner tube body tube seat (8) is connected with an inner tube body rotating hemostatic valve (9) at the right end.

2. The coaxial catheter system for stent electrode implantation of claim 1, wherein: The intermediate tube body (4) passes through the inner cavity of the outer tube body (1) and is connected through the outer tube body rotating hemostatic valve (3), and comprises a second PTFE inner lining (15) and a second developing mark ring (20), the outer side surface of the second PTFE inner lining (15) is connected with the inner wall of a third braided tube (17) through a first supporting spring (16), the outer side surface of the third braided tube (17) is bonded with a fourth braided tube (18), the outer side surface of the fourth braided tube (18) is bonded with a second nylon outer tube (19), and the inner diameter of the intermediate tube body (4) is 1.7-1.8 mm, which can be compatible with the inner tube body (7) with an outer diameter of 5F; The wall thickness of the second PTFE inner lining (15) of the intermediate tube body (4) is 0.0005-0.001 inch; The first supporting spring (16) is a multi-strand nickel-titanium wire winding, the wire diameter is 0.025-0.05 mm, the strength is 2000-3000 MPa, the winding gap is 0.01-0.05 mm, and good support and flexibility are provided; The third braided tube (17) and the fourth braided tube (18) are made of stainless steel, the thickness is 0.001 inch, and the width is 0.003 inch, so that strong support and stability are provided; the grade of the second nylon outer tube (19) is TR90, the hardness is 60A, 70A, 80A, 35D, 40D, 55D, 63D and 72D respectively, the thickness is 0.025-0.075 mm, and the second nylon outer tube (19) is laminated and hot-joined with the PTFE inner lining to form an integrated whole, so as to support, navigate and position.

3. The coaxial catheter system for stent electrode implantation of claim 1, wherein: The inner tube body (7) passes through the inner cavity of the intermediate tube body (4) and is connected through the intermediate tube body rotating hemostatic valve (6), and comprises a third PTFE inner lining (21) and a third developing mark ring (26), the inner diameter of the inner tube body (7) is 1.4-1.5 mm, and the inner tube body (7) is used to deliver a stent electrode, the outer side of the third PTFE inner lining (21) is connected with a fifth braided tube (23) through a second supporting spring (22), the outer side surface of the fifth braided tube (23) is bonded with a sixth braided tube (24), the outer side surface of the sixth braided tube (24) is bonded with a third nylon outer tube (25), and the third developing mark ring (26) is arranged on the inner wall of the left end of the third nylon outer tube (25). The fifth braided tube (23) and the sixth braided tube (24) are made of stainless steel, with a thickness of 0.001 inch and a width of 0.003 inch, providing strong support and stability. The third PTFE inner liner (21) of the inner tube body (7) has a wall thickness of 0.0005-0.001 inch. The second support spring (22) is made of multiple strands of nickel-titanium wire, with a wire diameter of 0.025-0.05 mm, a strength of 2000-3000 MPa, and a winding gap of 0.01-0.05 mm, providing good support and flexibility.

4. The coaxial catheter system for stent electrode implantation of claim 1, wherein: The outer tube body (1) includes a first PTFE inner liner (10) and a first visualization marker ring (14). The inner cavity of the outer tube body (1) has a size of 0.088 inch, which can be compatible with the intermediate tube body (4) with an outer diameter of 6F. The first PTFE inner liner (10) is bonded to the outer surface of the first braided tube (11). The outer surface of the first braided tube (11) is bonded to the second braided tube (12). The outer surface of the second braided tube (12) is bonded to the first nylon outer tube (13). The first visualization marker ring (14) is fixedly installed on the left end inner wall of the first nylon outer tube (13).

5. The coaxial catheter system for stent electrode implantation of claim 4, wherein: The first visualization marker ring (14), the second visualization marker ring (20), and the third visualization marker ring (26) are platinum alloy rings. They are located in the middle layer of the inner tube and have a wall thickness of 0.025-0.05 mm and a width of 0.5-1.0 mm. They are configured as C-shaped rings or circular rings. The first visualization marker ring (14), the second visualization marker ring (20), and the third visualization marker ring (26) are used to be radiopaque under X-ray during surgery, indicating the position of the instrument head end.

6. The coaxial catheter system for stent electrode implantation of claim 4, wherein: The first PTFE inner liner (10) of the outer tube body (1) has a wall thickness of 0.0005-0.001 inch. The first braided tube (11) is made of stainless steel double round wire, with a thickness of 0.0005 inch-0.001 inch and a width of 0.002-0.003 inch, providing good support.

7. The coaxial catheter system for stent electrode implantation of claim 4, wherein: The second braided tube (12) is made of stainless steel double flat wire, with a thickness of 0.0005 inch-0.001 inch and a width of 0.002-0.003 inch, providing strong support and stability.

8. The coaxial catheter system for stent electrode implantation of claim 4, wherein: The first nylon outer tube (13) has a TR90 grade, with a hardness of 35D, 40D, 55D, 63D, and 72D from the distal end to the proximal end, and a thickness of 0.025 mm-0.075 mm. It is hot-welded and laminated with the first PTFE inner liner (10) to form an integral whole, serving the purpose of supporting navigation positioning.

9. The coaxial catheter system for stent electrode implantation of claim 3, wherein: The third nylon outer tube (25) has a TR90 grade, with a hardness of 60A, 70A, 80A, 35D, 40D, 55D, 63D, and 72D, and a thickness of 0.025 mm-0.075 mm. It is hot-welded and laminated with the third PTFE inner liner (21) to form an integral whole, serving the purpose of supporting navigation positioning, and is used for the implantation of superior sagittal sinus stent electrodes.

10. The coaxial catheter system for stent electrode implantation of claim 1, wherein: The outer tube body (1) surface is sleeved with a sealing bag (27), both ends of the sealing bag (27) are fixedly provided with rubber rings (28), the ports of the rubber rings (28) are clamped and connected with sealing plugs (29), the right end top side of the sealing bag (27) is fixedly communicated with a gas suction pipe (30), the tail end of the gas suction pipe (30) is fixedly communicated with an air bag (31), the tail end of the air bag (31) is fixedly communicated with a discharge pipe (33), and the tail end of the discharge pipe (33) is provided with a one-way valve (32).

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