A combined support catheter
By designing a modular support catheter that combines expansion and bending functions, the problem of existing support catheters being difficult to insert into complex blood vessels has been solved, improving treatment flexibility and reducing surgical costs.
Patent Information
- Application Number
- CN202211709723.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-29
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2042-12-29
AI Technical Summary
Existing support catheters struggle to establish effective vascular access when dealing with complex blood vessels, especially tortuous ones, leading to treatment difficulties. Furthermore, existing devices have a limited range of structures and cannot meet diverse treatment needs.
A combined support catheter was designed, comprising an expansion tube and a bending tube. The expansion tube includes an expansion tube seat, a first stress diffusion tube, an expansion main tube, and a contrast point. The bending tube includes a bending tube seat, a second stress diffusion tube, a bending main tube, and a shaping wire. By using them together, vascular dilation and insertion into bending sites can be achieved. The materials and structural design are adapted to different patient conditions.
It enables both dilation and bending in complex blood vessels, improving the flexibility and efficiency of treatment and reducing surgical costs for patients.
Smart Images
Figure CN116159226B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of medical instruments, and relates to a combined support catheter. BACKGROUND
[0002] In recent years, due to changes in people's living habits, the number of patients with deep vein thrombosis (DVT) is increasing, and the number of medical operations is also increasing year by year. In the treatment of DVT, due to the occlusion of the blood vessels of the patients, it is difficult for the guide wire used for treatment to pass through the lesion site. The existing support catheter instrument has a single structure and can only handle simple stenosis lesions. It is difficult to establish a blood vessel access for complex blood vessels, especially for blood vessels with severe bending. Therefore, it is urgent to design and develop a combined support catheter to overcome the defects of the prior art and meet the actual production and application requirements. SUMMARY
[0003] In view of the defects of the prior art, the purpose of the present application is to provide a combined support catheter. In the present application, the combined support catheter is used as a combined instrument, which can not only expand the blood vessels, but also can be inserted into the curved part of the blood vessels after bending. The overall use is convenient, and the support catheter can be used simultaneously, or the expansion tube or the bending tube can be used according to the patient's condition, which can save the patient's operation cost.
[0004] To achieve this purpose, the technical scheme adopted by the present application is as follows:
[0005] The present application provides a combined support catheter, which comprises an expansion tube and a bending tube used in combination. The expansion tube comprises an expansion tube seat, a first stress diffusion tube, an expansion main tube and a developing point. One end of the expansion tube seat is fixedly connected with one end of the expansion main tube. The first stress diffusion tube is sleeved at the connection between the expansion tube seat and the expansion main tube. The end of the expansion main tube away from the expansion tube seat is provided with the developing point. The bending tube comprises a bending tube seat, a second stress diffusion tube, a bending main tube and a shaping wire. One end of the bending tube seat is fixedly connected with one end of the bending main tube. The second stress diffusion tube is sleeved at the connection between the bending tube seat and the bending main tube. The shaping wire is used to be inserted into the bending main tube.
[0006] In the present application, the combined support catheter is used as a combined instrument, which can not only expand the blood vessels, but also can be inserted into the curved part of the blood vessels after bending. The overall use is convenient, and the support catheter can be used simultaneously, or the expansion tube or the bending tube can be used according to the patient's condition, which can save the patient's operation cost.
[0007] It should be noted that the size of the support catheter in the present application is not specially limited and can be enlarged or reduced proportionally. Those skilled in the art can make adaptive adjustments according to the actual situation.
[0008] Preferably, the material of the expansion tube base is hard material.
[0009] Preferably, the hard material is any one of high-hardness polyether amide, nylon, polyethylene and polypropylene.
[0010] It should be noted that the high-hardness value of the high-hardness polyether amide refers to a hardness of 60D or above in Shore hardness, which is known to those skilled in the art.
[0011] Preferably, one end of the expansion tube base is fixedly connected to one end of the expansion main tube by injection molding or gluing.
[0012] Preferably, the end of the expansion tube base away from the expansion main tube is detachably connected to a connector for power injection.
[0013] Preferably, the first stress dispersion tube is sleeved on the connection between the expansion tube base and the expansion main tube by injection molding, gluing or heat shrinkage treatment.
[0014] Preferably, the material of the first stress dispersion tube is soft material.
[0015] It should be noted that the material of the first stress dispersion tube is soft material because it is connected between the expansion tube base and the expansion main tube, which can protect the expansion main tube from bending.
[0016] Preferably, the soft material is any one of low-hardness polyether amide, polyurethane and silica gel.
[0017] It should be noted that the low-hardness value of the low-hardness polyether amide refers to a hardness of 50D or below in Shore hardness, which is known to those skilled in the art.
[0018] Preferably, the expansion main tube is sequentially divided into a first straight tube, a first reducing tube, a second straight tube and a second reducing tube in the direction away from the expansion tube base.
[0019] It should be noted that the first reducing tube is used to expand the narrow part of the blood vessel, and the second reducing tube is used to block the narrow part of the blood vessel after the expansion main tube passes through the narrow part of the blood vessel, so as to avoid the expansion main tube from moving along the direction of blood flow.
[0020] Preferably, the diameter of the first straight tube is greater than the diameter of the second straight tube.
[0021] The diameter of the first flat tube is larger than the diameter of the second flat tube, because under this structure limitation, the second variable diameter tube can be effectively clamped at the stenosis of the blood vessel, and if not, the expanded main tube may move along the direction of blood flow.
[0022] Preferably, the diameter of the first variable diameter tube gradually decreases in the direction away from the first flat tube.
[0023] Preferably, the diameter of the second variable diameter tube gradually decreases in the direction away from the second flat tube.
[0024] As a preferred technical solution of the present application, the developing point is provided with at least three.
[0025] It should be noted that the developing point in the present application refers to a radiopaque marker point; the present application limits the developing point to be provided with at least three, because under this numerical limitation, both the position of the variable diameter tube can be effectively observed, and the length of each lesion segment can be estimated by the number of developing points, and if not, the length of the lesion position estimated by the operator may not be accurate.
[0026] Preferably, the developing point is provided at both ends of the second flat tube.
[0027] Preferably, the developing point is provided at the middle of the second flat tube.
[0028] Preferably, the developing point and the expanded main tube are fixedly connected.
[0029] Preferably, the developing point and the expanded main tube are fixedly connected by pressing or gluing.
[0030] It should be noted that the present application does not limit the specific operation method of pressing or gluing, and those skilled in the art should know that the pressing or gluing method conforming to the content of the present application can be used in the present application, and those skilled in the art can make adaptive adjustment of relevant operation parameters according to actual situation.
[0031] As a preferred technical solution of the present application, the material of the bending pipe seat is a hard material.
[0032] Preferably, the hard material is any one of high-hardness polyether amide, nylon, polyethylene and polypropylene.
[0033] Preferably, one end of the bending pipe seat is fixedly connected to one end of the bending main tube by injection molding or gluing.
[0034] Preferably, the end of the bending pipe seat away from the bending main tube is detachably connected with a connector for power injection.
[0035] As a preferred technical solution of the present application, the second stress diffusion pipe is sleeved on the connection between the elbow base and the elbow main pipe through injection molding, gluing or heat shrinkage treatment.
[0036] It should be noted that the specific operation method of injection molding, gluing or heat shrinkage treatment is not limited in the present application, and those skilled in the art should know that the injection molding, gluing or heat shrinkage treatment conforming to the content of the present application can be used in the present application, and those skilled in the art can make adaptive adjustment of relevant operation parameters according to actual conditions.
[0037] Preferably, the material of the second stress diffusion pipe is a soft material.
[0038] It should be noted that the material of the second stress diffusion pipe in the present application is a soft material because it is connected between the elbow base and the elbow main pipe to protect the elbow main pipe from bending.
[0039] Preferably, the soft material is any one of low-hardness polyether amide, polyurethane and silica gel.
[0040] As a preferred technical solution of the present application, the elbow main pipe comprises a guidewire protection layer, a support layer, a tensile layer, an elbow layer, a blood vessel protection layer and a developing layer which are sequentially stacked from inside to outside.
[0041] Preferably, the material of the guidewire protection layer is polytetrafluoroethylene or polyimide.
[0042] It should be noted that the function of the guidewire protection layer in the present application is to protect the elbow main pipe from being scratched by the guidewire when the elbow main pipe is inserted into the human body along the guidewire, to prevent the elbow main pipe from damaging the surface structure or coating of the guidewire, and to reduce the resistance during pushing or withdrawing. It can be understood that materials conforming to the material can be used in the present application.
[0043] Preferably, the material of the support layer is any one or a combination of two or more of polyimide, polytetrafluoroethylene, stainless steel and nickel-titanium.
[0044] It should be noted that the function of the support layer in the present application is to protect the elbow main pipe from being crushed or bent when the elbow main pipe is inserted into the narrow part of the blood vessel under the extrusion of the blood vessel. It can be understood that materials conforming to the material can be used in the present application.
[0045] Preferably, the material of the tensile layer is stainless steel or nickel-titanium.
[0046] It should be noted that the function of the tensile layer in the present application is to protect the elbow main pipe from being broken when it is forcibly pulled out after being extruded by the narrow part of the blood vessel when the elbow main pipe is withdrawn from the human body. It can be understood that materials conforming to the material can be used in the present application.
[0047] Preferably, the material of the bending layer is stainless steel or nickel-titanium.
[0048] It should be noted that the bending layer in the application can be bent by the operator according to the degree of curvature of the patient's blood vessel in vitro, and the bending angle is generally 20-40°. The bending layer is used to line the curved part of the blood vessel, so that the guide wire can smoothly pass through the curved blood vessel. It can be understood that materials that meet the requirements can be used in the application.
[0049] Preferably, the length of the bending layer is less than the length of the bending main tube.
[0050] The length of the bending layer is less than the length of the bending main tube, which is limited by the structure. If the structure is not limited, the bending main tube may be damaged or layered.
[0051] Preferably, the material of the blood vessel protection layer is any one of nylon, polyether amide and polyurethane.
[0052] It should be noted that the blood vessel protection layer in the application protects the surface of the bending main tube from scratching the blood vessel when the bending main tube is inserted into or withdrawn from the human body. It can be understood that materials that meet the requirements can be used in the application.
[0053] Preferably, the surface of the nylon, polyether amide and polyurethane is coated with a hydrophilic coating.
[0054] Preferably, the hydrophilic coating includes polyvinylpyrrolidone.
[0055] Preferably, the material of the developing layer is any one or a combination of two or more of platinum-iridium alloy, platinum-tungsten alloy, tungsten, barium sulfate, bismuth trioxide and titanium dioxide.
[0056] It should be noted that the developing layer in the application indicates the position of the bending main tube when the bending main tube is inserted into the human body. It can be understood that materials that meet the requirements can be used in the application.
[0057] Preferably, the material of the shaping wire is any one of stainless steel, nickel-titanium, nylon and polyether ether ketone.
[0058] It should be noted that the shaping wire in the application is used to prevent the inner cavity of the bending main tube from being crushed when the bending layer of the bending main tube needs to be bent. It can be understood that materials that meet the requirements can be used in the application.
[0059] As a preferred technical solution of the application, the guide wire protection layer, the support layer, the tensile layer, the bending layer, the blood vessel protection layer and the developing layer are sequentially and fixedly connected.
[0060] Preferably, the guide wire protection layer, the support layer, the tensile resistance layer, the bending adjustment layer, the blood vessel protection layer and the developing layer are sequentially fixedly connected by means of hot melting, gluing or direct dip coating.
[0061] As a preferred technical solution of the present application, the thickness of the guide wire protection layer is 0.03-0.05mm, for example, it can be 0.03mm, 0.032mm, 0.034mm, 0.036mm, 0.038mm, 0.04mm, 0.042mm, 0.044mm, 0.046mm, 0.048mm, 0.05mm, but not limited to the listed values, other values not listed in the range are also applicable.
[0062] The present application limits the thickness of the guide wire protection layer to 0.03-0.05mm, because within this range, the guide wire protection layer has good strength and does not affect the overall thickness of the bending adjustment main pipe. If it is not within this range, the guide wire protection layer may crack easily during work, or the overall thickness of the bending adjustment main pipe may increase.
[0063] Preferably, the thickness of the support layer is 0.05-0.08mm, for example, it can be 0.05mm, 0.052mm, 0.054mm, 0.056mm, 0.058mm, 0.06mm, 0.062mm, 0.064mm, 0.066mm, 0.068mm, 0.07mm, 0.072mm, 0.074mm, 0.076mm, 0.078mm, 0.08mm, but not limited to the listed values, other values not listed in the range are also applicable.
[0064] The present application limits the thickness of the support layer to 0.05-0.08mm, because within this range, the support layer has good strength and does not affect the overall thickness of the bending adjustment main pipe. If it is not within this range, the support layer may crack easily during work, or the overall thickness of the bending adjustment main pipe may increase.
[0065] Preferably, the thickness of the tensile resistance layer is 0.02-0.04mm, for example, it can be 0.02mm, 0.022mm, 0.024mm, 0.026mm, 0.028mm, 0.03mm, 0.032mm, 0.034mm, 0.036mm, 0.038mm, 0.04mm, but not limited to the listed values, other values not listed in the range are also applicable.
[0066] The thickness of the tensile layer is limited to 0.02-0.04 mm, because within this range, the tensile layer has good strength and does not affect the overall thickness of the bending main pipe, and if it is not within this range, the tensile layer may crack easily during work, or the overall thickness of the bending main pipe increases.
[0067] Preferably, the thickness of the bending layer is 0.03-0.08 mm, for example, it can be 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, but not limited to the listed values, other values not listed within this range are also applicable.
[0068] The thickness of the bending layer is limited to 0.03-0.08 mm, because within this range, the bending layer has good strength and does not affect the overall thickness of the bending main pipe, and if it is not within this range, the bending layer may crack easily during work, or the overall thickness of the bending main pipe increases.
[0069] Preferably, the thickness of the blood vessel protection layer is 0.05-0.08 mm, for example, it can be 0.05 mm, 0.052 mm, 0.054 mm, 0.056 mm, 0.058 mm, 0.06 mm, 0.062 mm, 0.064 mm, 0.066 mm, 0.068 mm, 0.07 mm, 0.072 mm, 0.074 mm, 0.076 mm, 0.078 mm, 0.08 mm, but not limited to the listed values, other values not listed within this range are also applicable.
[0070] The thickness of the blood vessel protection layer is limited to 0.05-0.08 mm, because within this range, the blood vessel protection layer has good strength and does not affect the overall thickness of the bending main pipe, and if it is not within this range, the blood vessel protection layer may crack easily during work, or the overall thickness of the bending main pipe increases.
[0071] Preferably, the thickness of the developing layer is 0.05-0.1 mm, for example, it can be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, but not limited to the listed values, other values not listed within this range are also applicable.
[0072] The thickness of the developing layer is limited to 0.05-0.1 mm, because within this range, the developing layer has good strength and does not affect the overall thickness of the bending main pipe, and if it is not within this range, the developing layer may crack easily during work, or the overall thickness of the bending main pipe increases.
[0073] Compared with the prior art, the present application has the following advantages:
[0074] In the present application, the combined support catheter is used for combined instruments, which can expand the blood vessel and can also penetrate into the curved part of the blood vessel after bending, and the whole is convenient to use, and the support catheter can be used simultaneously, or the expansion tube or the bending tube can be used according to the patient's condition, so that the patient's operation cost can be saved. BRIEF DESCRIPTION OF DRAWINGS
[0075] Figure 1 The structure diagram of the expansion tube in the support catheter of one specific embodiment of the present application is provided;
[0076] Figure 2 The structure diagram of the bending tube in the support catheter of one specific embodiment of the present application is provided;
[0077] Figure 3 The structure diagram of the shaping wire in the support catheter of one specific embodiment of the present application is provided;
[0078] Figure 4 The structure diagram of the expansion main tube in the support catheter of one specific embodiment of the present application is provided;
[0079] Figure 5 The structure diagram of the bending main tube in the support catheter of one specific embodiment of the present application is provided;
[0080] 1-expansion tube; 11-expansion tube seat; 12-first stress diffusion tube; 13-expansion main tube; 14-development point; 131-first reducing tube; 132-second reducing tube; 141-first development point; 142-second development point; 143-third development point;
[0081] 2-bending tube; 21-bending tube seat; 22-second stress diffusion tube; 23-bending main tube; 24-shaping wire; 231-guide wire protection layer; 232-support layer; 233-tensile layer; 234-bending layer; 235-vessel protection layer; 236-development layer. DETAILED DESCRIPTION
[0082] The technical solutions of the present application will be further described below in combination with the drawings and through specific embodiments.
[0083] In one specific embodiment, the present application provides a combined support catheter, which comprises an expansion tube and a bending tube, and the expansion tube and the bending tube are connected through a first stress diffusion tube and a second stress diffusion tube. Figures 1 to 5As shown, the support catheter comprises a dilating tube 1 and a bending tube 2 used in combination, the dilating tube 1 comprises a dilating tube base 11, a first stress diffusion tube 12, a dilating main tube 13 and a developing point 14, one end of the dilating tube base 11 is fixedly connected with one end of the dilating main tube 13, the first stress diffusion tube 12 is sleeved at the connecting position of the dilating tube base 11 and the dilating main tube 13, and the developing point 14 is arranged at the end of the dilating main tube 13 away from the dilating tube base 11; the bending tube 2 comprises a bending tube base 21, a second stress diffusion tube 22, a bending main tube 23 and a shaping wire, one end of the bending tube base 21 is fixedly connected with one end of the bending main tube 23, the second stress diffusion tube 22 is sleeved at the connecting position of the bending tube base 21 and the bending main tube 23, and the shaping wire 24 is used to penetrate into the bending main tube 23.
[0084] In the present application, the combined support catheter is used for combined instruments, which can dilate blood vessels and penetrate into curved parts of blood vessels after bending, is convenient to use as a whole, and can be used simultaneously or according to the condition of the patient to use the dilating tube 1 or the bending tube 2, so that the cost of the operation of the patient can be saved.
[0085] The material of the dilating tube base 11 is a hard material, the hard material is any one of high-hardness polyether amide, nylon, polyethylene and polypropylene, one end of the dilating tube base 11 is fixedly connected with one end of the dilating main tube 13 through injection molding or gluing, and the end of the dilating tube base 11 away from the dilating main tube 13 is detachably connected with a joint for power injection.
[0086] The first stress diffusion tube 12 is sleeved at the connecting position of the dilating tube base 11 and the dilating main tube 13 through injection molding, gluing or heat shrinkage treatment, and the material of the first stress diffusion tube 12 is a soft material. It should be noted that the material of the first stress diffusion tube 12 is a soft material because it is connected between the dilating tube base 11 and the dilating main tube 13 to protect the dilating main tube 13 from bending; the soft material is any one of low-hardness polyether amide, polyurethane and silica gel.
[0087] The dilating main tube 13 is sequentially divided into a first straight tube, a first variable-diameter tube 131, a second straight tube and a second variable-diameter tube 132 along the direction away from the dilating tube base 11. It should be noted that the first variable-diameter tube 131 is used to dilate the narrow part of the blood vessel, and the second variable-diameter tube 132 is used to be clamped in the narrow part of the blood vessel after the dilating main tube 13 penetrates through the narrow part of the blood vessel, so as to avoid the dilating main tube 13 from moving along the direction of blood flow. Further, the diameter of the first straight tube is greater than that of the second straight tube, the diameter of the first variable-diameter tube 131 gradually decreases along the direction away from the first straight tube, and the diameter of the second variable-diameter tube 132 gradually decreases along the direction away from the second straight tube.
[0088] The developing points 14 are arranged at least three, the developing points 14 are arranged at two ends of the second flat tube, the developing points 14 are arranged at the middle of the second flat tube, the developing points 14 are fixedly connected with the expansion main body tube 13, and the developing points 14 are fixedly connected with the expansion main body tube 13 through pressing or gluing. It should be noted that the specific operation method of the pressing or gluing is not limited in the present application, and those skilled in the art should know that the pressing or gluing method conforming to the content of the present application can be used in the present application, and the skilled person can make adaptive adjustment of the relevant operation parameters according to the actual situation.
[0089] The material of the bending pipe base 21 is a hard material, the hard material is any one of high-hardness polyether amide, nylon, polyethylene and polypropylene, one end of the bending pipe base 21 is fixedly connected with one end of the bending main body pipe 23 through injection molding or gluing, and a joint is detachably connected to the end of the bending pipe base 21 away from the bending main body pipe 23 for power injection.
[0090] The second stress dispersion pipe 22 is sleeved on the connection between the bending pipe base 21 and the bending main body pipe 23 through injection molding, gluing or heat shrinkage treatment. It should be noted that the specific operation method of the injection molding, gluing or heat shrinkage treatment is not limited in the present application, and those skilled in the art should know that the injection molding, gluing or heat shrinkage treatment conforming to the content of the present application can be used in the present application, and the skilled person can make adaptive adjustment of the relevant operation parameters according to the actual situation. Further, the material of the second stress dispersion pipe 22 is a soft material, and the soft material is any one of low-hardness polyether amide, polyurethane and silica gel.
[0091] The bending main body pipe 23 comprises a guide wire protection layer 231, a support layer 232, a tensile layer 233, a bending layer 234, a blood vessel protection layer 235 and a developing layer 236 which are sequentially stacked from inside to outside, the material of the guide wire protection layer 231 is polytetrafluoroethylene or polyimide, the material of the support layer 232 is any one or a combination of two or more of polyimide, polytetrafluoroethylene, stainless steel and nickel titanium. The material of the tensile layer 233 is stainless steel or nickel titanium. The material of the bending layer 234 is stainless steel or nickel titanium. The length of the bending layer 234 is less than the length of the bending main body pipe 23. The material of the blood vessel protection layer 235 is any one of nylon, polyether amide and polyurethane, the surface of the nylon, polyether amide and polyurethane is coated with a hydrophilic coating, and the hydrophilic coating comprises polyvinylpyrrolidone. The material of the developing layer 236 is any one or a combination of two or more of platinum-iridium alloy, platinum-tungsten alloy, tungsten, barium sulfate, bismuth oxide and titanium dioxide. The material of the shaping wire 24 is any one of stainless steel, nickel titanium, nylon and polyether ether ketone.
[0092] The guide wire protection layer 231, the support layer 232, the tensile resistance layer 233, the bending adjustment layer 234, the blood vessel protection layer 235 and the developing layer 236 are sequentially and fixedly connected, and are sequentially fixedly connected through hot melting, gluing or direct dip coating. The thickness of the guide wire protection layer 231 is 0.03-0.05 mm. The thickness of the support layer 232 is 0.05-0.08 mm. The thickness of the tensile resistance layer 233 is 0.02-0.04 mm. The thickness of the bending adjustment layer 234 is 0.03-0.08 mm. The thickness of the blood vessel protection layer 235 is 0.05-0.08 mm. The thickness of the developing layer 236 is 0.05-0.1 mm.
[0093] Embodiment 1
[0094] The embodiment provides a combined support catheter, wherein:
[0095] The support catheter comprises a combined use of a dilating tube 1 and a bending tube 2. The dilating tube 1 comprises a dilating tube seat 11, a first stress diffusion tube 12, a dilating main tube 13 and a developing point 14. One end of the dilating tube seat 11 is fixedly connected with one end of the dilating main tube 13. The first stress diffusion tube 12 is sleeved at the connection between the dilating tube seat 11 and the dilating main tube 13. The dilating main tube 13 is provided with the developing point 14 at the end away from the dilating tube seat 11. The bending tube 2 comprises a bending tube seat 21, a second stress diffusion tube 22, a bending main tube 23 and a shaping wire. One end of the bending tube seat 21 is fixedly connected with one end of the bending main tube 23. The second stress diffusion tube 22 is sleeved at the connection between the bending tube seat 21 and the bending main tube 23. The shaping wire 24 is used for penetrating into the bending main tube 23.
[0096] The dilating tube seat 11 is made of high-hardness polyether amide. One end of the dilating tube seat 11 is fixedly connected with one end of the dilating main tube 13 through injection molding. The end of the dilating tube seat 11 away from the dilating main tube 13 is detachably connected with a joint for power injection.
[0097] The first stress diffusion tube 12 is sleeved at the connection between the dilating tube seat 11 and the dilating main tube 13 through injection molding. The first stress diffusion tube 12 is made of low-hardness polyether amide.
[0098] The dilating main tube 13 is sequentially divided into a first straight tube, a first variable-diameter tube 131, a second straight tube and a second variable-diameter tube 132 along the direction away from the dilating tube seat 11. Further, the diameter of the first straight tube is greater than that of the second straight tube. The diameter of the first variable-diameter tube 131 gradually decreases along the direction away from the first straight tube. The diameter of the second variable-diameter tube 132 gradually decreases along the direction away from the second straight tube.
[0099] The developing points 14 are provided with three, the first developing point 141 and the second developing point 142 are provided at two ends of the second flat tube, and the third developing point 143 is provided at the middle of the second flat tube. The developing points 14 are fixedly connected with the expanding main tube 13, and the developing points 14 are fixedly connected with the expanding main tube 13 through pressing and holding.
[0100] The material of the bending seat 21 is high-hardness polyether amide. One end of the bending seat 21 is fixedly connected with one end of the bending main tube 23 through injection molding. A joint is detachably connected with the end of the bending seat 21 away from the bending main tube 23, and is used for power injection.
[0101] The second stress diffusion tube 22 is sleeved on the connection between the bending seat 21 and the bending main tube 23 through injection molding. Further, the material of the second stress diffusion tube 22 is low-hardness polyether amide.
[0102] The bending main tube 23 comprises a guide wire protection layer 231, a support layer 232, a tensile layer 233, a bending layer 234, a blood vessel protection layer 235 and a developing layer 236 which are sequentially stacked from inside to outside. The material of the guide wire protection layer 231 is polytetrafluoroethylene. The material of the support layer 232 is polyimide. The material of the tensile layer 233 is stainless steel. The material of the bending layer 234 is stainless steel. The length of the bending layer 234 is less than the length of the bending main tube 23. The material of the blood vessel protection layer 235 is nylon, and a hydrophilic coating layer is coated on the surface of the nylon. The material of the developing layer 236 is platinum-iridium alloy. The material of the shaping wire 24 is stainless steel.
[0103] The guide wire protection layer 231, the support layer 232, the tensile layer 233, the bending layer 234, the blood vessel protection layer 235 and the developing layer 236 are sequentially fixedly connected through heat melting. The thickness of the guide wire protection layer 231 is 0.03 mm. The thickness of the support layer 232 is 0.05 mm. The thickness of the tensile layer 233 is 0.02 mm. The thickness of the bending layer 234 is 0.03 mm. The thickness of the blood vessel protection layer 235 is 0.05 mm. The thickness of the developing layer 236 is 0.05 mm.
[0104] Embodiment 2
[0105] The embodiment provides a combined support catheter, wherein:
[0106] The support catheter comprises a dilating tube 1 and a bending tube 2 used in combination, the dilating tube 1 comprises a dilating tube base 11, a first stress diffusion tube 12, a dilating main tube 13 and a developing point 14, one end of the dilating tube base 11 is fixedly connected with one end of the dilating main tube 13, the first stress diffusion tube 12 is sleeved at the connecting position of the dilating tube base 11 and the dilating main tube 13, and the developing point 14 is arranged at the end of the dilating main tube 13 away from the dilating tube base 11; the bending tube 2 comprises a bending tube base 21, a second stress diffusion tube 22, a bending main tube 23 and a shaping wire, one end of the bending tube base 21 is fixedly connected with one end of the bending main tube 23, the second stress diffusion tube 22 is sleeved at the connecting position of the bending tube base 21 and the bending main tube 23, and the shaping wire 24 is arranged to penetrate into the bending main tube 23.
[0107] The material of the dilating tube base 11 is nylon, one end of the dilating tube base 11 is fixedly connected with one end of the dilating main tube 13 through gluing, and a joint is detachably connected with the end of the dilating tube base 11 away from the dilating main tube 13, for power injection.
[0108] The first stress diffusion tube 12 is sleeved at the connecting position of the dilating tube base 11 and the dilating main tube 13 through gluing, and the material of the first stress diffusion tube 12 is polyurethane.
[0109] The dilating main tube 13 is sequentially divided into a first straight tube, a first variable-diameter tube 131, a second straight tube and a second variable-diameter tube 132 along the direction away from the dilating tube base 11. Further, the diameter of the first straight tube is greater than that of the second straight tube, the diameter of the first variable-diameter tube 131 gradually decreases along the direction away from the first straight tube, and the diameter of the second variable-diameter tube 132 gradually decreases along the direction away from the second straight tube.
[0110] The developing point 14 is arranged at two ends of the second straight tube, the developing point 14 is arranged at the middle of the second straight tube, the developing point 14 is fixedly connected with the dilating main tube 13, and the developing point 14 is fixedly connected with the dilating main tube 13 through gluing.
[0111] The material of the bending tube base 21 is nylon, one end of the bending tube base 21 is fixedly connected with one end of the bending main tube 23 through gluing, and a joint is detachably connected with the end of the bending tube base 21 away from the bending main tube 23, for power injection.
[0112] The second stress diffusion tube 22 is sleeved at the connecting position of the bending tube base 21 and the bending main tube 23 through gluing. Further, the material of the second stress diffusion tube 22 is polyurethane.
[0113] The bending main body tube 23 comprises, from inside to outside, a guide wire protection layer 231, a support layer 232, a tensile layer 233, a bending layer 234, a blood vessel protection layer 235, and a developing layer 236. The material of the guide wire protection layer 231 is polyimide, and the material of the support layer 232 is polytetrafluoroethylene. The material of the tensile layer 233 is nickel-titanium. The material of the bending layer 234 is nickel-titanium. The length of the bending layer 234 is less than the length of the bending main body tube 23. The material of the blood vessel protection layer 235 is polyether amide, and the surface of the polyether amide is coated with a hydrophilic coating layer, which is polyvinylpyrrolidone. The material of the developing layer 236 is platinum-tungsten alloy. The material of the shaping wire 24 is nickel-titanium.
[0114] The guide wire protection layer 231, the support layer 232, the tensile layer 233, the bending layer 234, the blood vessel protection layer 235, and the developing layer 236 are fixedly connected in sequence by means of adhesion. The thickness of the guide wire protection layer 231 is 0.04 mm. The thickness of the support layer 232 is 0.07 mm. The thickness of the tensile layer 233 is 0.03 mm. The thickness of the bending layer 234 is 0.06 mm. The thickness of the blood vessel protection layer 235 is 0.06 mm. The thickness of the developing layer 236 is 0.07 mm.
[0115] Embodiment 3
[0116] The present embodiment provides a combined support catheter, wherein:
[0117] The support catheter comprises a combined use of a dilatation tube 1 and a bending tube 2. The dilatation tube 1 comprises a dilatation tube seat 11, a first stress diffusion tube 12, a dilatation main body tube 13, and a developing point 14. One end of the dilatation tube seat 11 and one end of the dilatation main body tube 13 are fixedly connected. The first stress diffusion tube 12 is sleeved at the connection between the dilatation tube seat 11 and the dilatation main body tube 13. The dilatation main body tube 13 is provided with the developing point 14 at the end away from the dilatation tube seat 11. The bending tube 2 comprises a bending tube seat 21, a second stress diffusion tube 22, a bending main body tube 23, and a shaping wire. One end of the bending tube seat 21 and one end of the bending main body tube 23 are fixedly connected. The second stress diffusion tube 22 is sleeved at the connection between the bending tube seat 21 and the bending main body tube 23. The shaping wire 24 is used for penetrating into the bending main body tube 23.
[0118] The material of the dilatation tube seat 11 is polyethylene. One end of the dilatation tube seat 11 is fixedly connected with one end of the dilatation main body tube 13 by injection molding. The end of the dilatation tube seat 11 away from the dilatation main body tube 13 is detachably connected with a joint for power injection.
[0119] The first stress diffusion tube 12 is sleeved at the connection between the dilatation tube seat 11 and the dilatation main body tube 13 by heat shrinkage treatment. The material of the first stress diffusion tube 12 is silica gel.
[0120] The expansion main body tube 13 is sequentially divided into a first flat tube, a first reducing tube 131, a second flat tube and a second reducing tube 132 in the direction away from the expansion tube base 11. Further, the diameter of the first flat tube is greater than the diameter of the second flat tube, the diameter of the first reducing tube 131 gradually decreases in the direction away from the first flat tube, and the diameter of the second reducing tube 132 gradually decreases in the direction away from the second flat tube.
[0121] The three visualization points 14 are arranged at the two ends of the second flat tube and the middle of the second flat tube, and the visualization points 14 are fixedly connected with the expansion main body tube 13 by adhesion.
[0122] The material of the bending tube base 21 is polyethylene, one end of the bending tube base 21 is fixedly connected with one end of the bending main body tube 23 by injection molding, and a joint is detachably connected with the end of the bending tube base 21 away from the bending main body tube 23 for power injection.
[0123] The second stress diffusion tube 22 is sleeved on the connection between the bending tube base 21 and the bending main body tube 23 by heat shrinkage treatment. Further, the material of the second stress diffusion tube 22 is silica gel.
[0124] The bending main body tube 23 comprises a guidewire protection layer 231, a support layer 232, a tensile layer 233, a bending layer 234, a blood vessel protection layer 235 and a visualization layer 236 which are sequentially stacked from inside to outside. The material of the guidewire protection layer 231 is polytetrafluoroethylene, and the material of the support layer 232 is polyimide. The material of the tensile layer 233 is stainless steel. The material of the bending layer 234 is stainless steel. The length of the bending layer 234 is less than the length of the bending main body tube 23. The material of the blood vessel protection layer 235 is polyurethane, and the surface of the polyurethane is coated with a hydrophilic coating layer which is polyvinylpyrrolidone. The material of the visualization layer 236 is barium sulfate. The material of the shaping wire 24 is polyether ether ketone.
[0125] The guidewire protection layer 231, the support layer 232, the tensile layer 233, the bending layer 234, the blood vessel protection layer 235 and the visualization layer 236 are sequentially fixedly connected by direct dip coating. The thickness of the guidewire protection layer 231 is 0.05mm. The thickness of the support layer 232 is 0.08mm. The thickness of the tensile layer 233 is 0.04mm. The thickness of the bending layer 234 is 0.08mm. The thickness of the blood vessel protection layer 235 is 0.08mm. The thickness of the visualization layer 236 is 0.1mm.
[0126] Example 4
[0127] The embodiment provides a combined support catheter, and the thickness of the guidewire protection layer 231 is 0.02mm, and other parameters and test conditions are the same as those of example 1.
[0128] Example 5
[0129] This example provides a combined support catheter, and different from example 1 is that the thickness of the guide wire protection layer 231 is 0.06mm, and other parameters and test conditions are the same as example 1.
[0130] Example 6
[0131] This example provides a combined support catheter, and different from example 1 is that the thickness of the support layer 232 is 0.04mm, and other parameters and test conditions are the same as example 1.
[0132] Example 7
[0133] This example provides a combined support catheter, and different from example 1 is that the thickness of the support layer 232 is 0.09mm, and other parameters and test conditions are the same as example 1.
[0134] Example 8
[0135] This example provides a combined support catheter, and different from example 1 is that the thickness of the bending adjustment layer 234 is 0.02mm, and other parameters and test conditions are the same as example 1.
[0136] Example 9
[0137] This example provides a combined support catheter, and different from example 1 is that the thickness of the bending adjustment layer 234 is 0.09mm, and other parameters and test conditions are the same as example 1.
[0138] Example 10
[0139] This example provides a combined support catheter, and different from example 1 is that the thickness of the developing layer 236 is 0.04mm, and other parameters and test conditions are the same as example 1.
[0140] Example 11
[0141] This example provides a combined support catheter, and different from example 1 is that the thickness of the developing layer 236 is 0.12mm, and other parameters and test conditions are the same as example 1.
[0142] Comparative Example 1
[0143] This comparative example provides a combined support catheter, and different from example 1 is that the bending adjustment tube 2 is not set, and other parameters and test conditions are the same as example 1.
[0144] Comparative Example 2
[0145] The comparative example provides a combined support catheter, and the difference from example 1 is that the expansion tube 1 is not arranged, and other parameters and test conditions are the same as those of example 1.
[0146] It is known through the operation of the support catheters in the above examples and comparative examples that:
[0147] It is known through the comparison of example 1 and examples 4, 5 that the stability of the support catheter of example 1 is better than that of the support catheters of examples 4 and 5, because the thickness of the guide wire protection layer 231 is limited to 0.03-0.07 mm in the application, so that the guide wire protection layer 231 has sufficient hardness, and the overall size of the bending main tube is not affected.
[0148] It is known through the comparison of example 1 and examples 6 and 7 that the stability of the support catheter of example 1 is better than that of the support catheters of examples 6 and 7, because the thickness of the support layer 232 is limited to 0.05-0.08 mm in the application, so that the support layer 232 has sufficient hardness, and the overall size of the bending main tube is not affected.
[0149] It is known through the comparison of example 1 and examples 8 and 9 that the stability of the support catheter of example 1 is better than that of the support catheters of examples 8 and 9, because the thickness of the bending layer 234 is limited to 0.03-0.08 mm in the application, so that the bending layer 234 has sufficient hardness, and the overall size of the bending main tube is not affected.
[0150] It is known through the comparison of example 1 and examples 10 and 11 that the stability of the support catheter of example 1 is better than that of the support catheters of examples 10 and 11, because the thickness of the developing layer 236 is limited to 0.05-0.1 mm in the application, so that the developing layer 236 has sufficient hardness, and the overall size of the bending main tube is not affected.
[0151] It is known through the comparison of examples 1-3 and comparative examples 1 and 2 that the stability of the support catheter of example 1 is better than that of the support catheters of comparative examples 1 and 2, because the combined support catheter is used in the application, so that the application can expand both straight and curved stenosis.
[0152] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, and those skilled in the art should understand that any changes or replacements within the technical scope disclosed by the application can be easily thought of by those skilled in the art, and all fall within the protection scope and disclosure scope of the application.
Claims
1. A combination support catheter, comprising: The supporting catheter comprises a dilating tube and a bending tube used in combination, the dilating tube comprises a dilating tube base, a first stress diffusion tube, a dilating main tube and a developing point, one end of the dilating tube base is fixedly connected with one end of the dilating main tube, the first stress diffusion tube is sleeved at the connection between the dilating tube base and the dilating main tube, and the dilating main tube is provided with the developing point at the end away from the dilating tube base; The bending tube comprises a bending tube base, a second stress diffusion tube, a bending main tube and a shaping wire, one end of the bending tube base is fixedly connected with one end of the bending main tube, the second stress diffusion tube is sleeved at the connection between the bending tube base and the bending main tube, and the shaping wire is used to penetrate into the bending main tube; When the dilating tube and the bending tube are used in combination, the bending main tube of the bending tube is arranged in the dilating main tube, and the bending tube is used to penetrate into a curved part of a blood vessel after bending. The bending main tube comprises, from inside to outside, a guide wire protection layer, a supporting layer, a tensile layer, a bending layer, a blood vessel protection layer and a developing layer. The bending layer is used to be bent by a surgeon according to the bending degree of a blood vessel of a patient, and then the bending main tube penetrates into the dilating main tube and penetrates out at the curved part of the blood vessel, so as to be laid in the curved part of the blood vessel, thereby facilitating the guide wire to smoothly penetrate through the curved blood vessel.
2. The support catheter of claim 1, wherein, The dilating tube base is made of a hard material.
3. The support catheter of claim 2, wherein, The hard material is any one of high-hardness polyether amide, nylon, polyethylene and polypropylene.
4. The support catheter of claim 3, wherein, One end of the dilating tube base is fixedly connected with one end of the dilating main tube through injection molding or gluing.
5. The support catheter of claim 4, wherein, A joint is detachably connected with the end of the dilating tube base away from the dilating main tube, and is used for power injection.
6. The support catheter of claim 1, wherein, The first stress diffusion tube is sleeved at the connection between the dilating tube base and the dilating main tube through injection molding, gluing or heat shrinkage treatment.
7. The support catheter of claim 1, wherein, The first stress diffusion tube is made of a soft material.
8. The support catheter of claim 7, wherein, The soft material is any one of low-hardness polyether amide, polyurethane and silica gel.
9. The support catheter of claim 1, wherein, The dilating main tube is sequentially divided into a first straight tube, a first variable-diameter tube, a second straight tube and a second variable-diameter tube in the direction away from the dilating tube base.
10. The support catheter of claim 9, wherein, The diameter of the first straight tube is greater than that of the second straight tube.
11. The support catheter of claim 9, wherein, The diameter of the first variable-diameter tube gradually decreases in the direction away from the first straight tube.
12. The support catheter of claim 9, wherein, The diameter of the second variable-diameter tube gradually decreases in the direction away from the second straight tube.
13. The support catheter of claim 9, wherein, The developing point is provided with at least three.
14. The support catheter of claim 13, wherein, The developing point is arranged at two ends of the second straight tube.
15. The support catheter of claim 14, wherein, The developing point is arranged at the middle part of the second straight tube.
16. The support catheter of claim 13, wherein, The developing point is fixedly connected with the dilating main tube.
17. The support catheter of claim 16, wherein, The developing point is fixedly connected with the dilating main tube through pressing or gluing.
18. The support catheter of claim 1, wherein, The bending tube base is made of a hard material.
19. The support catheter of claim 18, wherein, The hard material is any one of high-hardness polyether amide, nylon, polyethylene and polypropylene.
20. The support catheter of claim 18, wherein, One end of the bending tube base is fixedly connected with one end of the bending main tube through injection molding or gluing.
21. The support catheter of claim 20, wherein, A joint is detachably connected with the end of the bending tube base away from the bending main tube, and is used for power injection.
22. The support catheter of claim 1, wherein, The second stress diffusion tube is sleeved at the connection between the bending tube base and the bending main tube through injection molding, gluing or heat shrinkage treatment.
23. The support catheter of claim 22, wherein, The second stress dispersion tube is made of soft material.
24. The support catheter of claim 23, wherein, The soft material is any one of low-hardness polyether amide, polyurethane and silica gel.
25. The support catheter of claim 1, wherein, The material of the guide wire protection layer is polytetrafluoroethylene or polyimide.
26. The support catheter of claim 1, wherein, The material of the support layer is any one or a combination of two or more of polyimide, polytetrafluoroethylene, stainless steel and nickel titanium.
27. The support catheter of claim 1, wherein, The material of the tensile layer is stainless steel or nickel titanium.
28. The support catheter of claim 1, wherein, The material of the bending adjustment layer is stainless steel or nickel titanium.
29. The support catheter of claim 28, wherein, The length of the bending adjustment layer is less than the length of the bending adjustment main tube.
30. The support catheter of claim 1, wherein, The material of the blood vessel protection layer is any one of nylon, polyether amide and polyurethane.
31. The support catheter of claim 30, wherein, The surface of the nylon, polyether amide and polyurethane is coated with a hydrophilic coating.
32. The support catheter of claim 31, wherein, The hydrophilic coating comprises polyvinylpyrrolidone.
33. The support catheter of claim 1, wherein, The material of the developing layer is any one or a combination of two or more of platinum-iridium alloy, platinum-tungsten alloy, tungsten, barium sulfate, bismuth trioxide and titanium dioxide.
34. The support catheter of claim 1, wherein, The material of the shaping wire is any one of stainless steel, nickel titanium, nylon and polyether ether ketone.
35. The support catheter of claim 1, wherein, The guide wire protection layer, the support layer, the tensile layer, the bending adjustment layer, the blood vessel protection layer and the developing layer are sequentially and fixedly connected.
36. The support catheter of claim 35, wherein, The guide wire protection layer, the support layer, the tensile layer, the bending adjustment layer, the blood vessel protection layer and the developing layer are sequentially connected by hot melting, gluing or direct immersion coating.
37. The support catheter of claim 1, wherein, The thickness of the guide wire protection layer is 0.03-0.05mm.
38. The support catheter of claim 1, wherein, The thickness of the support layer is 0.05-0.08mm.
39. The support catheter of claim 1, wherein, The thickness of the tensile layer is 0.02-0.04mm.
40. The support catheter of claim 1, wherein, The thickness of the bending adjustment layer is 0.03-0.08mm.
41. The support catheter of claim 1, wherein, The thickness of the blood vessel protection layer is 0.05-0.08mm.
42. The support catheter of claim 1, wherein, The thickness of the developing layer is 0.05-0.1mm.
Citation Information
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