CN117959051A - Radial artery access catheter - Google Patents
Radial artery access catheter Download PDFInfo
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- CN117959051A CN117959051A CN202410068381.0A CN202410068381A CN117959051A CN 117959051 A CN117959051 A CN 117959051A CN 202410068381 A CN202410068381 A CN 202410068381A CN 117959051 A CN117959051 A CN 117959051A
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- film
- radial artery
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- 210000002321 radial artery Anatomy 0.000 title claims abstract description 52
- 239000012528 membrane Substances 0.000 claims description 47
- -1 polyethylene terephthalate Polymers 0.000 claims description 10
- 239000004952 Polyamide Substances 0.000 claims description 6
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
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- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical group [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 210000002376 aorta thoracic Anatomy 0.000 abstract description 12
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- 238000005452 bending Methods 0.000 description 17
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
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- 229910002027 silica gel Inorganic materials 0.000 description 3
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
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- 210000004556 brain Anatomy 0.000 description 2
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
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- 229910000851 Alloy steel Inorganic materials 0.000 description 1
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- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention provides a radial artery access catheter, which comprises a sheath tube, a bracket and a film, wherein the sheath tube comprises a first catheter and a second catheter, the first catheter is sleeved on the inner side of the second catheter, the bracket is a self-expansion cylindrical bracket, the bracket is sleeved on the outer side of the distal end of the first catheter, the film is of an annular structure with two open ends, the film is sleeved on the outer side of the bracket, the distal end opening of the film is fixed on the outer surface of the first catheter, the proximal end opening is fixed on the inner surface of the second catheter, the film has a filling state and an unfilled state, the film covers and compresses the bracket in the unfilled state, the film is separated from the bracket in the filled state, and the bracket expands towards the second catheter. The radial artery access catheter is of a double-cavity structure, and the bracket and the film are arranged at the far end of the radial artery access catheter, so that the rigidity of the catheter can be changed, the supporting force of the aortic arch can be increased, and further, the radial artery access catheter can conveniently complete the whole cerebral vascular treatment.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to a radial artery access catheter.
Background
With the progress of neural intervention technology and consumables, more selective intervention operations are being treated for cerebral stroke. The nerve intervention approaches commonly used in clinic at present mainly comprise a femoral artery puncture approach and a radial artery puncture approach, wherein, as the femoral artery puncture operation needs to be performed in a lying state and the puncture side lower limb is straightened and braked for 12-24 hours, the operation of the patient is inconvenient, such as soreness of waist and back pain, fatigue, difficult eating and defecation, and more postoperative complications are caused; the above-mentioned disadvantages are avoided by radial artery puncture, but at present, there are few catheters specially used for the whole cerebral blood vessel treatment by radial artery puncture, and the main reason is that the cerebral blood supply artery runs reversely at an acute angle on the aortic arch and the catheter running from the self-locking bone down artery during radial artery radiography, and the catheter cannot obtain enough supporting force on the aortic arch, so the existing catheter cannot conveniently complete the whole cerebral blood vessel treatment by radial artery. Thus, there is a need for a catheter that provides superior aortic arch support and allows for convenient completion of full cerebral vascular treatment via the radial approach to the upper arm. And, there are few current reports on catheters specifically designed for the unique needs of the neurovascular system through radial artery access.
At present, in the actual use process of the radial artery access catheter, the distal end is expected to keep good softness, improve the over-bending capability of the blood vessel, have excellent supporting performance and keep bending resistance. However, the existing radial artery access catheter adopts a single braiding layer or a winding layer as a reinforcing layer, and then a polymer material is thermally compounded outside the reinforcing layer, and the mechanical properties of each section of the catheter after thermal compounding are fixed, so that the existing radial artery access catheter has a difficult good over-bending capability at an aortic arch position and simultaneously maintains excellent supporting performance, and further cannot conveniently complete the whole cerebral vascular treatment through radial arteries.
Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a radial artery access catheter, which solves the problems that the existing radial artery access catheter is difficult to have good overstretch capability at an aortic arch position and simultaneously maintains excellent supporting performance, and further, complete cerebral vascular treatment cannot be conveniently completed through radial artery.
In order to achieve the above object, the present invention provides the following technical solutions:
a radial artery access catheter, the radial artery access catheter comprising:
the sheath comprises a first catheter and a second catheter, and the first catheter is sleeved on the inner side of the second catheter;
The bracket is a self-expansion cylindrical bracket, and is sleeved outside the distal end of the first catheter;
The membrane, the membrane is both ends open-ended annular structure, the membrane cover is located the outside of support, the distal end opening of membrane is fixed in the surface of first pipe, the proximal end opening is fixed in the internal surface of second pipe, the membrane has filling state and not filling state, the membrane covers and compresses under not filling state the support, the membrane breaks away from under filling state the support, the support orientation the expansion of second pipe.
In an alternative embodiment of the invention, the membrane compresses the stent against the outer surface of the first catheter in an unfilled state, the membrane against the inner surface of the second catheter in a filled state, and the stent expands against the surface of the membrane.
In an alternative embodiment of the invention, the stent is a nickel-titanium alloy cutting stent;
The length of the bracket ranges from 10cm to 12cm.
In an alternative embodiment of the invention, the distal end of the stent is 40-80mm from the distal end of the first catheter.
In an alternative embodiment of the invention, the length of the film is 15.5-17.5cm.
In an alternative embodiment of the present invention, the material of the film is one of silica gel, nylon, polyethylene terephthalate, polyethylene, polyamide copolymer, polyurethane, and polyvinyl chloride;
The thickness of the film ranges from 0.075 to 0.125mm.
In an alternative embodiment of the present invention, the first catheter is formed by thermally compounding an inner layer, an intermediate layer and an outer layer, wherein the inner layer is made of polytetrafluoroethylene, the intermediate layer is made of stainless steel wires, and the outer layer is made of polyether block polyamide;
the thickness of the inner layer tube ranges from 0.012 mm to 0.025mm, the thickness of the middle layer ranges from 0.05 mm to 0.07mm, and the thickness of the outer layer ranges from 0.04 mm to 0.06mm.
In an alternative embodiment of the present invention, the inner diameter of the first conduit is 2.05-2.25mm, and the thickness of the conduit is 0.1-0.15mm;
the inner diameter of the second conduit is 2.4-2.6mm, and the thickness of the conduit is 0.05-0.1mm.
In an alternative embodiment of the present invention, the radial artery access catheter further includes an imaging ring, the imaging ring being disposed on a distal surface of the second catheter;
The distal end of the developing ring is 0.6-1.0mm from the distal end of the second catheter.
In an alternative embodiment of the present invention, the radial artery access catheter further includes a three-way handle, where the three-way handle includes a first handle portion, a second handle portion, and a third handle portion, where an inner cavity of the first handle portion is used for introducing filling liquid, an inner cavity of the second handle portion is sleeved on a proximal end of the first catheter, an inner cavity of the second handle portion is communicated with an inner cavity of the first catheter, and the third handle portion is sleeved on a proximal end of the second catheter, and an inner cavity of the first handle portion, an inner cavity of the third handle portion, and an inner cavity of the second catheter are communicated.
The beneficial effects are that:
The radial artery access catheter comprises a sheath tube, a bracket and a film, wherein the sheath tube comprises a first catheter and a second catheter, the first catheter is sleeved on the inner side of the second catheter, the bracket is a self-expansion cylindrical bracket, the bracket is sleeved on the outer side of the distal end of the first catheter, the film is of an annular structure with two open ends, the film is sleeved on the outer side of the bracket, the distal end opening of the film is fixed on the outer surface of the first catheter, the proximal end opening is fixed on the inner surface of the second catheter, the film has a filling state and an unfilled state, the film covers and compresses the bracket in the unfilled state, the film is separated from the bracket in the filled state, and the bracket expands towards the second catheter. The radial artery access catheter is of a double-cavity structure, a bracket and a film are arranged at the far end of the radial artery access catheter, and the rigidity of the radial artery access catheter can be changed, specifically: the stent is in a compressed state in an unfilled state of the membrane, has good vascular bending capability, is easy to pass through a tortuous blood vessel, and after a radial artery access catheter reaches a designated treatment position, filling liquid is introduced to fill the membrane, the membrane is separated from the stent in the filled state, and the stent expands towards a second catheter under the action of superelasticity of the stent, so that the supporting force of an aortic arch is increased, the stent does not have the problem of withdrawing when passing through other instruments, and simultaneously the membrane in the filled state and the expanded stent have good bending resistance, the establishment of a passage is better completed, the navigability and the supportability of a transitional region are optimized, so that a surgeon is more stable when passing through an arm and a trunk to reach the brain, and the problem that the tortuous blood vessel near the lesion is difficult to cross can be solved. Meanwhile, the operation time is shortened, the success rate of the operation is improved, the pain of the patient is relieved, and the patient is benefited.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. Wherein:
FIG. 1 is a schematic view of the radial artery access catheter of the present invention in a state of membrane filling;
FIG. 2 is a schematic cross-sectional view of a radial artery access catheter of the present invention in an unfilled state of a membrane;
FIG. 3 is a schematic cross-sectional view of the first conduit of FIG. 2;
Fig. 4 is a schematic structural view of the bracket of fig. 2 from another view.
1-Sheath tube; 11-a first conduit; 11 a-an inner layer; 11 b-an intermediate layer; 11 c-an outer layer; 12-a second conduit; 2-a bracket; 3-film; 4-a developing ring; 5-a three-way handle; 51-a first handle portion; 52-a second handle portion; 53-a third handle portion.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
The present invention will be described in detail with reference to examples. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
Aiming at the problems that the existing radial artery access catheter is difficult to have good bending capacity at the aortic arch and maintain excellent supporting performance, and further cannot conveniently complete the whole cerebral vascular treatment through the radial artery, the invention provides the radial artery access catheter which can realize the variable rigidity of the catheter, increase the supporting force at the aortic arch, and has good bending capacity at the aortic arch and maintain excellent supporting performance, so that the whole cerebral vascular treatment can be conveniently completed through the radial artery.
As shown in fig. 1 and 2, the radial artery access catheter of the present invention comprises a sheath tube 1, a stent 2 and a film 3, wherein the sheath tube 1 comprises a first catheter 11 and a second catheter 12, and the first catheter 11 is sleeved on the inner side of the second catheter 12; the bracket 2 is a self-expanding cylindrical bracket 2, and the bracket 2 is sleeved outside the distal end of the first catheter 11; the membrane 3 is of a ring-shaped structure with two open ends, the membrane 3 is sleeved on the outer side of the support 2, a distal opening of the membrane 3 is fixed on the outer surface of the first catheter 11, a proximal opening of the membrane 3 is fixed on the inner surface of the second catheter 12, the membrane 3 is in an inflated state and an uninflated state, the membrane 3 covers and compresses the support 2 in the uninflated state, the membrane 3 is separated from the support 2 in the inflated state, and the support 2 expands towards the second catheter 12.
After the film 3 is fixed, it has a ring structure with one end open, and the opening is toward the proximal end. In the unfilled state, the stent 2 is covered and restrained by the film 3 and is in a compressed state, and the stent 2 may or may not be in close contact with the outer surface of the first catheter 11 when in the compressed state, and the specific position is not limited to this as long as the stent is in the compressed state. The film 3 is in a full state and is separated from the bracket 2, the bracket 2 expands towards the second conduit 12 under the action of no binding due to the superelasticity of the bracket 2, the position of the expanded bracket 2 is not limited, and the bracket 2 can be clung to the inner surface of the second conduit 12 or not clung to the inner surface of the second conduit 12.
The radial artery access catheter is of a double-cavity structure, the support 2 and the film 3 are arranged at the far end of the radial artery access catheter, the support 2 is in a compressed state in an unfilled state of the film 3, the radial artery access catheter has good vascular bending resistance, and is easy to pass through tortuous vessels, after the radial artery access catheter reaches a designated treatment position, filling liquid is introduced to fill the film 3, the film 3 is separated from the support 2 in the filled state, the support 2 expands towards the second catheter 12 under the unrestrained effect due to the superelastic effect of the support 2, so that the support force at the aortic arch is increased, the problem of withdrawal does not occur when the support passes through other instruments, the film 3 and the expanded support 2 in the filled state have good bending resistance, the establishment of a passage is better completed, the navigability and the supportability of a transitional region are optimized, a surgeon can more stably pass through an arm and a trunk to reach the brain, and the problem that the tortuous vessels near lesions are difficult to span can be solved. Meanwhile, the operation time is shortened, the success rate of the operation is improved, the clinical operation is more convenient and reliable, the pain of a patient is relieved, and the patient is benefited.
In an embodiment of the invention, the membrane 3 compresses the stent 2 against the outer surface of the first conduit 11 in the unfilled state and the membrane 3 against the inner surface of the second conduit 12 in the filled state, the stent 2 expanding against the inner surface of the membrane 3. By the design, the radial artery access catheter has better vascular over-bending capability and bending resistance, and the establishment of the access is better completed.
In particular embodiments of the present invention, the material of the stent 2 may be selected from metals and metal alloys, such as stainless steel, steel alloys, cobalt-based alloys, platinum-based alloys, tin-based alloys, rhodium-based alloys, palladium-based alloys, aluminum-based alloys, molybdenum-based alloys, shape memory metals or alloys, nickel-titanium alloys, nickel-cobalt-chromium-molybdenum alloys, or other ductile metals. As shown in fig. 4, the stent 2 is preferably a nickel-titanium alloy cut stent, that is, the stent 2 is formed by cutting nickel-titanium shape memory alloy by laser and is a super-elastic self-expansion stent. The nickel-titanium alloy cutting support comprises a plurality of connected support units, wherein the support units are hexagonal, and the design is convenient for cutting operation, and meanwhile, the support 2 has good self-expansion performance.
Optionally, the length of the stent 2 is in the range of 10-12cm (such as 10cm, 10.5cm, 11cm, 11.5cm, 12cm and the interval value between any two end values), and the stent 2 with the length range can enable the catheter to have good vascular over-bending capability and bending resistance, so that the establishment of a passage can be completed better.
When the bracket 2 is arranged, the position design of the bracket 2 is reasonable so as to better complete the establishment of the passage. Optionally, the distal end of the stent 2 is 40-80mm (e.g., 40mm, 50mm, 60mm, 70mm, 80mm, and the interval between any two values) from the distal end of the first catheter 11.
In dimensioning the membrane 3, the membrane 3 is designed such that it completely covers the stent 2, so that the stent 2 is in a compressed state in the unfilled state of the membrane 3. Alternatively, the film 3 may have a length of 15.5-17.5cm (e.g., 15.5cm, 16cm, 16.5cm, 17cm, 17.5cm, and any interval between any two of the endpoints).
In an alternative embodiment of the invention, the material of the film 3 is one of silica gel, nylon, polyethylene terephthalate, polyethylene, polyamide copolymer, polyurethane and polyvinyl chloride; preferably, the film 3 is made of silica gel, and is easy to manufacture and easy to obtain.
When designing the membrane 3, the thickness of the membrane 3 is suitable to ensure that the membrane 3 can have a binding effect on the stent 2 in an unfilled state, so that the stent 2 is in a compressed state, and simultaneously the filling operation of the membrane 3 is easy. Alternatively, the film 3 has a thickness of 0.075-0.125mm (e.g., 0.075mm, 0.08mm, 0.09mm, 0.1mm, 0.125mm, and the interval between any two end points).
In the embodiment of the present invention, as shown in fig. 3, the first catheter 11 is formed by thermally compounding an inner layer 11a, an intermediate layer 11b and an outer layer 11c, wherein the inner layer 11a is made of polytetrafluoroethylene (abbreviated as PTFE), the intermediate layer 11b is made of stainless steel wire, the intermediate layer 11b is a reinforcing layer, and the outer layer 11c is made of polyether block polyamide (abbreviated as PEBAX).
Alternatively, the inner layer 11a tube has a thickness in the range of 0.012-0.025mm (e.g., 0.012mm, 0.015mm, 0.018mm, 0.02mm, 0.025mm, and any interval therebetween), the intermediate layer 11b has a thickness in the range of 0.05-0.07mm (e.g., 0.05mm, 0.06mm, 0.07mm, and any interval therebetween), and the outer layer 11c has a thickness in the range of 0.04-0.06mm (e.g., 0.04mm, 0.05mm, 0.06mm, and any interval therebetween). The intermediate layer 11b is a stainless steel wire layer, that is, the thickness of the intermediate layer 11b is the diameter of the stainless steel wire.
In the specific embodiment of the present invention, the inner diameter of the first conduit 11 is 2.05-2.25mm (such as 2.05mm, 2.10mm, 2.15mm, 2.20mm, 2.25mm and the interval value between any two end points), and the thickness of the conduit is 0.1-0.15mm (such as 0.1mm, 0.12mm, 0.013mm, 0.014mm, 0.015mm and the interval value between any two end points); the second conduit 12 has an inner diameter of 2.4-2.6mm (e.g., 2.4mm, 2.45mm, 2.5mm, 2.55mm, 2.6mm, and the interval between any two of the endpoints) and a tube thickness of 0.05-0.1mm (e.g., 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, and the interval between any two of the endpoints). The design of the size not only can facilitate the assembly of the film 3 and the bracket 2, but also is beneficial to the establishment of a radial artery access catheter with better vascular over-bending capability and bending resistance and better completion of the access.
As shown in FIG. 1, in an embodiment of the present invention, the radial artery access catheter further includes an imaging ring 4, the imaging ring 4 being disposed on the distal surface of the second catheter 12; the setting of the developing ring 4 is easy to locate in the operation process, and the reliability and stability of the operation are ensured.
Optionally, the distal end of the visualization ring 4 is 0.6-1.0mm (e.g., 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, and the interval between any two of the end values) from the distal end of the second catheter 12.
As shown in fig. 1 and 2, the arrow direction in fig. 2 is the flow direction of the filling liquid. In the specific embodiment of the invention, the radial artery access catheter further comprises a three-way handle 5, the three-way handle 5 comprises a first handle part 51, a second handle part 52 and a third handle part 53 which are connected, the inner cavity of the first handle part 51 is used for introducing filling liquid, the inner cavity of the second handle part 52 is sheathed at the proximal end of the first catheter 11, the inner cavity of the second handle part 52 is communicated with the inner cavity of the first catheter 11, the third handle part 53 is sheathed at the second catheter 12, and the inner cavity of the first handle part 51, the inner cavity of the third handle part 53 and the inner cavity of the second catheter 12 are communicated. Thus, filling fluid flows in through the ports of the first handle portion 51 and flows through the lumen of the first handle portion 51, the lumen of the third handle portion 53 and the lumen of the second catheter 12 in sequence, and finally into the distal membrane 3 to fill the membrane 3; the filling liquid can be selected as physiological saline.
The proximal ends of the first handle portion 51 and the second handle portion 52 are both provided with luer connectors, which facilitates connection to external devices.
The use of the radial access catheter of the present invention is described in detail below with reference to fig. 2. In the process that the radial artery access catheter enters the blood vessel, the membrane 3 is in an unfilled state, in the state, the membrane 3 covers the outer side of the stent 2 and generates a binding effect on the stent 2, so that the stent 2 is in a compressed state, the stent 2 is tightly attached to the outer surface of the first catheter 11 after being compressed, and in the state, the radial artery access catheter has good blood vessel bending capability and can easily pass through a tortuous blood vessel. When the distal end of the radial artery access catheter reaches a designated treatment position, physiological saline is introduced into the port of the first handle part 51 of the three-way handle 5, the physiological saline sequentially flows through the inner cavity of the first handle part 51, the inner cavity of the third handle part 53 and the inner cavity of the second catheter 12 and finally enters the distal end film 3 to fill the film 3, the film 3 is tightly attached to the inner surface of the second catheter 12 after filling, in this state, the film 3 is separated from the bracket 2, the constraint effect on the bracket 2 disappears, the bracket 2 is in an expanded state under the non-constraint effect due to the superelastic effect of the bracket 2, the bracket 2 is tightly attached to the inner surface of the film 3 after expansion, in this state, the supporting force at the aortic arch is increased, so that the problem of retraction does not occur when the bracket passes through other instruments, meanwhile, the film 3 in the filled state and the expanded bracket 2 are tightly attached to the inner surface of the second catheter 12, the establishment of the film 3 has good bending resistance, the establishment of a better completion passage, the navigation and the supportability of a transition area are optimized, so that a surgeon can more stably cross the lesion near the tortuous blood vessel when passing through an arm and a trunk. Meanwhile, the operation time is shortened, the success rate of the operation is improved, the clinical operation is more convenient and reliable, the pain of a patient is relieved, and the patient is benefited.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A radial artery access catheter, the radial artery access catheter comprising:
the sheath comprises a first catheter and a second catheter, and the first catheter is sleeved on the inner side of the second catheter;
The bracket is a self-expansion cylindrical bracket, and is sleeved outside the distal end of the first catheter;
The membrane, the membrane is both ends open-ended annular structure, the membrane cover is located the outside of support, the distal end opening of membrane is fixed in the surface of first pipe, the proximal end opening is fixed in the internal surface of second pipe, the membrane has filling state and not filling state, the membrane covers and compresses under not filling state the support, the membrane breaks away from under filling state the support, the support orientation the expansion of second pipe.
2. The radial access catheter of claim 1, wherein the membrane compresses the stent against the outer surface of the first catheter in an unfilled state, wherein the membrane against the inner surface of the second catheter in a filled state, and wherein the stent expands against the surface of the membrane.
3. The radial access catheter of claim 1, wherein the stent is a nitinol cut stent;
The length of the bracket ranges from 10cm to 12cm.
4. The radial access catheter of claim 3, wherein the distal end of the stent is 40-80mm from the distal end of the first catheter.
5. The radial access catheter of claim 3, wherein the film has a length of 15.5 cm to 17.5cm.
6. The radial artery access catheter of claim 1, wherein the film is one of silicone, nylon, polyethylene terephthalate, polyethylene, polyamide copolymer, polyurethane, polyvinyl chloride;
The thickness of the film ranges from 0.075 to 0.125mm.
7. The radial artery access catheter of claim 1, wherein the first catheter is formed by thermal compounding of an inner layer, an intermediate layer and an outer layer, the inner layer is made of polytetrafluoroethylene, the intermediate layer is made of stainless steel wire, and the outer layer is made of polyether block polyamide;
the thickness of the inner layer tube ranges from 0.012 mm to 0.025mm, the thickness of the middle layer ranges from 0.05 mm to 0.07mm, and the thickness of the outer layer ranges from 0.04 mm to 0.06mm.
8. The radial artery access catheter of claim 1, wherein the first catheter has an inner diameter of 2.05-2.25mm and a thickness of 0.1-0.15mm;
the inner diameter of the second conduit is 2.4-2.6mm, and the thickness of the conduit is 0.05-0.1mm.
9. The radial access catheter of claim 1, further comprising an imaging ring disposed on a distal surface of the second catheter;
The distal end of the developing ring is 0.6-1.0mm from the distal end of the second catheter.
10. The radial access catheter of any one of claims 1-9, further comprising a three-way handle comprising a first handle portion, a second handle portion, and a third handle portion connected, wherein the lumen of the first handle portion is configured to be filled with a filling fluid, wherein the lumen of the second handle portion is coupled to the proximal end of the first catheter, wherein the lumen of the second handle portion is in communication with the lumen of the first catheter, wherein the lumen of the third handle portion is coupled to the proximal end of the second catheter, and wherein the lumen of the first handle portion, the lumen of the third handle portion, and the lumen of the second catheter are in communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410068381.0A CN117959051A (en) | 2024-01-17 | 2024-01-17 | Radial artery access catheter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410068381.0A CN117959051A (en) | 2024-01-17 | 2024-01-17 | Radial artery access catheter |
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| CN117959051A true CN117959051A (en) | 2024-05-03 |
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| CN202410068381.0A Pending CN117959051A (en) | 2024-01-17 | 2024-01-17 | Radial artery access catheter |
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| CN115738039A (en) * | 2022-12-05 | 2023-03-07 | 上海心玮医疗科技股份有限公司 | Balloon catheter inner cavity structure, manufacturing method and tool thereof and balloon catheter |
| CN219681444U (en) * | 2023-04-07 | 2023-09-15 | 上海加奇生物科技苏州有限公司 | interventional catheter |
| CN117045390A (en) * | 2023-10-12 | 2023-11-14 | 苏州美创医疗科技有限公司 | Expansion bracket |
-
2024
- 2024-01-17 CN CN202410068381.0A patent/CN117959051A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11244385A (en) * | 1998-03-03 | 1999-09-14 | Kanegafuchi Chem Ind Co Ltd | Medical baloon catheter shaft and its manufacturing method |
| US20030074049A1 (en) * | 2000-08-25 | 2003-04-17 | Kensey Nash Corporation | Covered stents and systems for deploying covered stents |
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| CN117045390A (en) * | 2023-10-12 | 2023-11-14 | 苏州美创医疗科技有限公司 | Expansion bracket |
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