CN104758025A - Mesh spring ring and manufacturing method thereof - Google Patents
Mesh spring ring and manufacturing method thereof Download PDFInfo
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- CN104758025A CN104758025A CN201510202324.8A CN201510202324A CN104758025A CN 104758025 A CN104758025 A CN 104758025A CN 201510202324 A CN201510202324 A CN 201510202324A CN 104758025 A CN104758025 A CN 104758025A
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- spring
- netted
- net cover
- metal
- metal net
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12027—Type of occlusion
- A61B17/12031—Type of occlusion complete occlusion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
- A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/1214—Coils or wires
Abstract
The invention provides a mesh spring ring. The mesh spring ring comprises a metal mesh sleeve and a spring. The spring is sleeved with the metal mesh sleeve, and the inner diameter of the metal mesh sleeve is larger than the outer diameter of the spring. The metal mesh sleeve is a memory alloy mesh. A metal core is arranged in the spring in a penetrating mode. The metal core and the metal mesh sleeve are fixed to the two ends of the spring. The mesh spring ring is used for replacing an existing spring ring structure, the embolism effect is enhanced to a large degree through an expanded mesh shape, the filling rate is low, meanwhile, the weight of fillers is lowered, arterial aneurysm is prevented from oppressing surrounding nervous tissue, the mesh hole structure has the good flexibility and elasticity, and can be attached to the wall of the arterial aneurysm well after being released in a tumor cavity, and the mesh hole structure is stably placed in the arterial aneurysm and cannot fall off. Meanwhile, certain mechanical strength can be achieved in the conveying process through the spring in the spring ring in the metal mesh sleeve, the spring ring has good mechanical conduction, and the shape and position of the mesh spring ring can be displayed under X rays.
Description
Technical field
The present invention relates to medical instruments field, especially relate to a kind of netted turn and preparation method thereof.
Background technology
Ink vessel transfusing Coil embolization is the essential therapeutic arsenals of intracranial aneurysm, but existing turn surgery cost is expensive, fine and close filling rate is lower, risk is relatively large, particularly giant aneurysm tumor intracavity can produce obvious occupation time process after filling turn, compressing peripheral nerve tissue, the compressing of gravity also easily causes Parent artery occlusion.
Particularly for complex lesions such as wide neck aneurysm, simple turn cannot reach therapeutic effect, and support must be coordinated to use, and by the supporting role of support, prevents turn from coming off from tumor intracavity, which again increases difficulty and the medical expense of operation.
Prior art discloses Matrix detachable coil (GDC), the steel conveying comprising a platinum-tungsten alloys turn (92% platinum, 8% tungsten) and be attached thereto.Support the use with the infusion catheter of head end band double labelling and power source special.GDC-10UltraSoft model is anti-uncoiling turn, and its its centre has multi-filament shape material (polypropylene) to help anti-uncoiling.But this turn filling rate is low, implant weight large, aneurysm can be caused the compressing of peripheral nerve tissue.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of netted turn and preparation method thereof, and netted turn filling rate provided by the invention is high, and implant weight is low.
The invention provides a kind of netted turn, comprise metal net cover and spring; It is outside that described metal net cover is sheathed on described spring, and described metal net cover internal diameter is greater than described spring outer diameter; Described metal net cover is memory-alloy mesh; Described spring inner run through be provided with metal-cored; Described spring, metal-cored and metal net cover are fixed at the two ends of spring.
Preferably, described metal net cover material is Nitinol.
Preferably, described metal net cover surface-coated has hydrophilic coating.
Preferably, described hydrophilic coating is polyvinylpyrrolidone, and the thickness of described hydrophilic coating is 0.006-0.025mm.
Preferably, described metal net cover is prepared by memory alloy wire, and described memorial alloy filament diameter is 0.01mm ~ 0.2mm.
Preferably, described spring materials is selected from the one in platinum, platinum alloy, billon or tungsten.
Preferably, described metal-cored material is selected from the one in platinum alloy, billon, tungsten or rustless steel.
Preferably, described netted turn naturalness is spiral or ball-type.
Preferably, described netted turn naturalness width is 1 ~ 50mm.
The invention provides a kind of netted turn preparation method, comprising:
Be that raw material prepares metal webmaster with memorial alloy;
Described metal webmaster heat treatment is obtained metal net cover;
Spring, metal-cored and metal net cover are fixed;
Described metal net cover is sheathed on spring outside, and described metal net cover internal diameter is greater than described spring outer diameter; Described metal-cored running through is arranged at described spring inner.
Compared with prior art, the invention provides a kind of netted turn, comprise metal net cover and spring; It is outside that described metal net cover is sheathed on described spring, and described metal net cover internal diameter is greater than described spring outer diameter; Described metal net cover is memory-alloy mesh; Described spring inner run through be provided with metal-cored; Described spring, metal-cored and metal net cover are fixed at the two ends of spring.The present invention will substitute existing coil structures by netted turn, the netted high degree expanded enhances effect of embolization, filling rate is low, alleviate the weight of implant simultaneously, avoid aneurysm to the compressing of peripheral nerve tissue, mesh-like structure has good compliance and elasticity, can fit well, be firmly placed in aneurysm and do not come off after the release of tumor intracavity with aneurysm wall.The present invention, when not using support, also can be used for the complex lesions such as treatment wide neck aneurysm.Meanwhile, the spring of the turn inside of metal net cover inside of the present invention can make to have certain mechanical strength when carrying, and makes turn obtain good mechanotransduction, serves simultaneously and show the shape of netted turn and the function of position under X-ray.The metal-cored of spring inner can the effect of support spring, can fix its length simultaneously.
Accompanying drawing explanation
Fig. 1 is the spiral-shaped netted coil structures schematic diagram that the embodiment of the present invention 1 prepares;
Fig. 2 is the netted coil structures schematic diagram of the ball-type that the embodiment of the present invention 3 prepares;
Fig. 3 is spring and metal-cored assembly structure schematic diagram in the netted turn for preparing of the embodiment of the present invention;
Fig. 4 is the schematic diagram of the netted turn Access artery tumor of the ball-type that the embodiment of the present invention 3 prepares.
Detailed description of the invention
The invention provides a kind of netted turn, comprise metal net cover and spring; It is outside that described metal net cover is sheathed on described spring, and described metal net cover internal diameter is greater than described spring outer diameter; Described metal net cover is memory-alloy mesh; Described spring inner run through be provided with metal-cored; Described spring, metal-cored and metal net cover are fixed at the two ends of spring.
Below in conjunction with drawings and Examples, the present invention is described in further details.As shown in Figure 1, Figure 2 and shown in Fig. 3, wherein Fig. 1 is the spiral-shaped netted coil structures schematic diagram that the embodiment of the present invention 1 prepares; Fig. 2 is the netted coil structures schematic diagram of the ball-type that the embodiment of the present invention 3 prepares; Fig. 3 is spring and metal-cored assembly structure schematic diagram in the netted turn for preparing of the embodiment of the present invention; Fig. 4 is the schematic diagram of the netted turn Access artery tumor of the ball-type that the embodiment of the present invention 3 prepares.In each figure, sequence number is expressed as: 1 is metal net cover, and 2 is spring, and 3 is metal-cored, and 4 is becket; Be illustrated in figure 4 the netted turn of the present invention and be filled into schematic diagram in aneurysm, wherein, 5 be aneurysm, 6 is blood vessel, and 7 is blood flow direction.
In the present invention, described netted turn comprises metal net cover and spring.Described metal net cover is memory-alloy mesh; Preferably, described metal net cover is Nitinol.Nitinol of the present invention is Nitinol well known to those skilled in the art, and its composition is preferably 54.5-57.0% nickel, 43-45.5% titanium.
Metal net cover of the present invention is prepared by memory alloy wire, and described memorial alloy filament diameter is preferably 0.01mm ~ 0.2mm; Be more preferably 0.05mm ~ 0.15mm.
In the present invention, the preparation method of described metal net cover is preferably specially: with braider B alloy wire is woven into netted, obtain through heat treatment shaping again.The diameter of described metal net cover is preferably 0.5mm ~ 6mm, is more preferably 1mm ~ 5mm, most preferably is 2mm ~ 4mm; The density of described metal net cover is preferably 15 ~ 100PPI (Per Point Inch, the quantity in per inch cross point), and the total length of described metal net cover is preferably 20 ~ 500mm, and being more preferably is 30 ~ 450mm, most preferably is 40 ~ 400mm.Length after metal net cover sizing is then different according to spiral and the given shape such as spherical, does not limit at this.
Metal net cover preferred surface of the present invention is coated with hydrophilic coating; Preferably, described hydrophilic coating is polyvinylpyrrolidone, and the thickness of described hydrophilic coating is preferably 0.006-0.025mm; Be more preferably 0.01-0.020mm; The process that hydrophilic coating of the present invention can make netted turn discharge from conduit will obtain less frictional resistance.
Metal net cover of the present invention has self-expanding function, after aneurysm cavity implanted by the netted turn that it is prepared, automatically open, stablizing illegally occupies in aneurysm, effective stop blood flow impacts aneurysm wall, the blood flow rate of tumor intracavity obviously slows down and even stagnates, and tumor intracavity forms thrombosis fast, thus prevents aneurysm from continuing to increase or break.
Netted turn of the present invention comprises spring, and described spring materials is preferably selected from the one in platinum, platinum alloy, billon or tungsten.The diameter of described platinum, platinum alloy, billon or tungsten is preferably selected from 0.01 ~ 0.2mm, is more preferably selected from 0.05 ~ 0.15mm.The external diameter of spring of the present invention is preferably 0.2 ~ 0.5mm, is more preferably 0.25 ~ 0.45mm; Described its length is preferably 20 ~ 650mm, is more preferably 40 ~ 550mm, most preferably is 50 ~ 500mm; The pitch of described spring is preferably 0.2mm ~ 0.6mm, is more preferably 0.3mm ~ 0.55mm, most preferably is 0.35mm ~ 0.5mm.
In the present invention, described metal net cover is sheathed on spring outside, and described metal net cover internal diameter is greater than described spring outer diameter; Described spring inner run through be provided with metal-cored; Described metal-cored material is preferably selected from the one in platinum alloy, billon, tungsten or rustless steel.Described metal-cored diameter is preferably 0.1 ~ 0.43mm, is more preferably 0.15 ~ 0.40mm, most preferably is 0.2 ~ 0.35mm; Described metal-cored length is preferably 20 ~ 650mm, is more preferably 40 ~ 550mm; Most preferably be 50 ~ 500mm.
In the present invention, described spring, metal-cored and metal net cover are fixed at the two ends of spring.The present invention does not limit for described fixed form, and preferably adopt becket to fix, the material of described becket is preferably selected from the one in titanium alloy, platinum, platinum alloy or rustless steel; The internal diameter of described becket is preferably 0.2 ~ 1mm, and external diameter is preferably 0.25 ~ 1.3mm, and width is preferably 0.3 ~ 1.5mm.
The spring of the turn inside of metal net cover inside of the present invention can make to have certain mechanical strength when carrying, and makes turn obtain good mechanotransduction, serves simultaneously and show the shape of netted turn and the function of position under X-ray.The metal-cored of spring inner can the effect of support spring, can fix its length simultaneously.
Netted turn naturalness of the present invention can be spiral or ball-type, also can be irregularly shaped arbitrarily.Netted turn naturalness width of the present invention is preferably 1 ~ 50mm, is more preferably 2 ~ 40mm.
In a part of technical scheme of the present invention, described netted turn naturalness can be spiral.The screw diameter of described helicoidal structure is preferably 1mm ~ 50mm, is more preferably 2mm ~ 40mm, most preferably is 3mm ~ 35mm, is the most preferably 5mm ~ 30mm; The pitch of described helicoidal structure is preferably 0.5mm ~ 6.5mm, is more preferably 1.0mm ~ 6.0mm, most preferably is 2.0mm ~ 5.0mm.
In a part of technical scheme of the present invention, described netted turn naturalness can be ball-type.The diameter of described ball-type is preferably 1 ~ 50mm; Be more preferably 2mm ~ 40mm, most preferably be 3mm ~ 35mm, be the most preferably 5mm ~ 30mm.In a part of technical scheme of the present invention, described netted turn naturalness can be irregularly shaped arbitrarily, as long as it is 1 ~ 50mm that maximum gauge preferably meets.
The invention provides a kind of netted turn preparation method, comprising:
Be that raw material prepares metal webmaster with memorial alloy;
Described metal webmaster heat treatment is obtained metal net cover;
Spring, metal-cored and metal net cover are fixed;
Described metal net cover is sheathed on spring outside, and described metal net cover internal diameter is greater than described spring outer diameter; Described metal-cored running through is arranged at described spring inner.
First the present invention is that raw material prepares metal webmaster with memorial alloy; Described metal webmaster heat treatment is obtained metal net cover.The present invention preferably adopts the method for braiding to prepare; The preparation method of described metal net cover is preferably specially: be that material knitting obtains metal webmaster with memorial alloy; Woven webmaster is assemblied on mould, is shaped into specific shape through Technology for Heating Processing.The present invention does not limit for the model of described braider, braider well known to those skilled in the art, the HTBZ-40 that can manufacture for Shenzhen Huitai Medical Instrument Co., Ltd.Heat treatment temperature of the present invention is preferably 330-650 DEG C, is more preferably 350-630 DEG C, most preferably is 360-610 DEG C.Described heat treatment time is preferably 3-45min, is more preferably 3-45min.The diameter of described mesh grid is preferably 0.5mm ~ 6mm, is more preferably 1mm ~ 5mm, most preferably is 2mm ~ 4mm; The density of described metal net cover is preferably 25 ~ 100PPI (Per Point Inch, the quantity in per inch cross point), and the total length of described metal net cover is preferably 20 ~ 500mm, and being more preferably is 30 ~ 450mm, most preferably is 40 ~ 400mm.
Metal net cover of the present invention is preferably Nitinol.The composition of Nitinol of the present invention is preferably 54.5-57.0% nickel, 43-45.5% titanium.Metal net cover of the present invention is prepared by memory alloy wire, and described memorial alloy filament diameter is preferably 0.01mm ~ 0.2mm; Be more preferably 0.05mm ~ 0.15mm.
Metal net cover preferred surface of the present invention is coated with hydrophilic coating; Preferably, described hydrophilic coating is polyvinylpyrrolidone, and the thickness of described hydrophilic coating is preferably 0.006-0.025mm; Be more preferably 0.01-0.020mm.The present invention does not limit for the coating method of described hydrophilic coating, preferably for the mode of being smeared by lixiviate, spraying or wiping, hydrophilic coating can be coated in metal net cover surface.
After obtaining metal net cover, spring, metal-cored and metal net cover are fixed; The present invention does not limit for described spring and metal-cored source, and can be self-control, also can be commercially available.Described spring materials is preferably selected from the one in platinum, platinum alloy, billon or tungsten.The diameter of described platinum, platinum alloy, billon or tungsten is preferably selected from 0.01 ~ 0.2mm, is more preferably selected from 0.05 ~ 0.15mm.The external diameter of spring of the present invention is preferably 0.2 ~ 0.5mm, is more preferably 0.25 ~ 0.45mm; Described its length is preferably 20 ~ 650mm, is more preferably 40 ~ 550mm, most preferably is 50 ~ 500mm; The pitch of described spring is preferably 0.2mm ~ 0.6mm, is more preferably 0.3mm ~ 0.55mm, most preferably is 0.35mm ~ 0.5mm.
In the present invention, described metal net cover is sheathed on spring outside, and described metal net cover internal diameter is greater than described spring outer diameter; Described spring inner run through be provided with metal-cored; Described metal-cored material is preferably selected from the one in platinum alloy, billon, tungsten or rustless steel.Described metal-cored diameter is preferably 0.1 ~ 0.43mm, is more preferably 0.15 ~ 0.40mm, most preferably is 0.2 ~ 0.35mm; Described metal-cored length is preferably 20 ~ 650mm, is more preferably 40 ~ 550mm; Most preferably be 50 ~ 500mm.
The present invention does not limit for described fixed form, and fix preferably by the mode of becket by welding, the material of described becket is preferably selected from the one in titanium alloy, platinum, platinum alloy or rustless steel; The internal diameter of described becket is preferably 0.2 ~ 1mm, and external diameter is preferably 0.25 ~ 1.3mm, and width is preferably 0.3 ~ 1.5mm.The technological parameter of described welding is preferably: electric current 60 ~ 140A, pulsewidth 2.0 ~ 10.0ms, frequency, 2 ~ 15HZ, weld interval 0.5 ~ 12s.
The invention provides a kind of netted turn, comprise metal net cover and spring; Described metal net cover is sheathed on spring outside, and described metal net cover internal diameter is greater than described spring outer diameter; Described metal net cover is memory-alloy mesh; Described spring inner run through be provided with metal-cored; Described spring, metal-cored and metal net cover are fixed at the two ends of spring.The present invention will substitute existing coil structures by netted turn, the netted high degree expanded enhances effect of embolization, filling rate is low, alleviate the weight of implant simultaneously, avoid aneurysm to the compressing of peripheral nerve tissue, mesh-like structure has good compliance and elasticity, can fit well, be firmly placed in aneurysm and do not come off after the release of tumor intracavity with aneurysm wall.The present invention, when not using support, also can be used for the complex lesions such as treatment wide neck aneurysm.Meanwhile, the spring of the turn inside of metal net cover inside of the present invention can make to have certain mechanical strength when carrying, and makes turn obtain good mechanotransduction, serves simultaneously and show the shape of netted turn and the function of position under X-ray.The metal-cored of spring inner can the effect of support spring, can fix its length simultaneously.
In order to further illustrate the present invention, below in conjunction with embodiment, netted turn provided by the invention and preparation method thereof is described in detail.
Embodiment 1
Adopt 60 diameters to be that the nitinol alloy wire (54.5% nickel, 45.5% titanium) of 0.05mm weaves webmaster, webmaster density is 100PPI (Per Point Inch, the quantity in per inch cross point); Being contained in by woven webmaster is heat-treated on mould, and fixed helically shaped, heat treatment temperature is 400 DEG C, and heat treatment time is 35min, and the diameter obtaining net is 1mm; Employing diameter is that spring prepared by the platinum alloy silk of 0.04mm, and the diameter of spring is 0.2mm; Pitch is 0.2mm; Be 0.15mm by diameter, length is that the platinum alloy of 100mm is arranged at spring inner as metal-cored running through; By spring together with the metal-cored inside being placed on metal net cover, with material be titanium alloy, internal diameter is 0.2mm, external diameter is 0.25mm, width is that the becket 4 of 0.3mm is by welding procedure fixing metal net 1, spring 2, metal-cored 3, technological parameter is: electric current 60A, pulsewidth 2.0ms, frequency, 2HZ, weld interval 2s.The screw diameter of the spiral-shaped netted turn prepared is 5mm, and pitch is 1mm.As shown in Figure 1, Fig. 1 is the spiral-shaped netted coil structures schematic diagram that the embodiment of the present invention 1 prepares.In the spiral-shaped netted turn Access artery tumor prepared by the present embodiment, result shows, it can be stable in aneurysm and not come off, and can effectively stop that blood flow directly impacts aneurysm wall, tumor intracavity can form thrombosis fast.In course of conveying, because the design of spring, push process very smooth and easy.The network structure of expanding prepared by the present embodiment shows superpower filling capacity, and the perineural phenomenon of compressing aneurysm does not occur in the implantation of netted turn.
Embodiment 2
Adopt 40 diameters to be that the nitinol alloy wire (55% nickel, 45% titanium) of 0.1mm weaves webmaster, webmaster density is 65PPI (Per Point Inch, the quantity in per inch cross point); Being contained in by woven webmaster is heat-treated on mould, and fixed helically shaped, heat treatment temperature is 500 DEG C, and heat treatment time is 20min, and the diameter obtaining net is 3mm; Polyvinylpyrrolidone is coated in titanium-nickel wire surface by the mode of spraying, and thickness is 0.01mm.Employing diameter is that the platinum wire of 0.1mm prepares spring, and the diameter of spring is 0.3mm; Pitch is 0.3mm; Be 0.2mm by diameter, length is that the billon of 200mm is arranged at spring inner as metal-cored running through; By spring together with the metal-cored inside being placed on metal net cover, with material be platinum alloy, internal diameter is 0.5mm, external diameter is 1.0mm, width is that the becket 4 of 1.0mm is by welding procedure fixing metal net 1, spring 2, metal-cored 3, technological parameter is: electric current 80A, pulsewidth 5ms, frequency, 7HZ, weld interval 5s.The screw diameter of the spiral-shaped netted turn prepared is 10mm, and pitch is 3mm.
Embodiment 3
Adopt 20 diameters to be that the nitinol alloy wire (57.0% nickel, 43% titanium) of 0.2mm weaves webmaster, webmaster density is 25PPI (Per Point Inch, the quantity in per inch cross point); Being contained in by woven webmaster is heat-treated on mould, determines spheroiding, and heat treatment temperature is 600 DEG C, and heat treatment time is 15min, and the diameter obtaining net is 5mm; Polyvinylpyrrolidone is coated in titanium-nickel wire surface by the mode of spraying, and thickness is 0.02mm.Employing diameter is that spring prepared by the billon of 0.2mm, and the diameter of spring is 0.5mm; Pitch is 0.6mm; Be 0.4mm by diameter, length is that the Nitinol of 300mm is arranged at spring inner as metal-cored running through; By spring together with the metal-cored inside being placed on metal net cover, with material be rustless steel, internal diameter is 1mm, external diameter is 1.2mm, width is that the becket 4 of 1.3mm is by welding procedure fixing metal net 1, spring 2, metal-cored 3, technological parameter is: electric current 120A, pulsewidth 8ms, frequency, 12HZ, weld interval 10s.The maximum gauge of the netted turn of the ball-type prepared is 25mm, and as shown in Figure 2, Fig. 2 is the netted coil structures schematic diagram of the ball-type that the embodiment of the present invention 3 prepares.It imported in a conventional manner in body, as shown in Figure 4, Fig. 4 is the schematic diagram of the netted turn Access artery tumor of the ball-type that the embodiment of the present invention 3 prepares to schematic diagram.Result shows, it can be stable in aneurysm and not come off, and can effectively stop that blood flow directly impacts aneurysm wall, tumor intracavity can form thrombosis fast.In course of conveying, because spring and coated designs, push process very smooth and easy.The network structure of expanding prepared by the present embodiment shows superpower filling capacity, and the perineural phenomenon of compressing aneurysm does not occur in the implantation of netted turn.
Embodiment 4
Adopt 30 diameters to be that the nitinol alloy wire (54.5% nickel, 45.5% titanium) of 0.15mm weaves webmaster, webmaster density is 35PPI (Per Point Inch, the quantity in per inch cross point); Being contained in by woven webmaster is heat-treated on mould, determines spheroiding, and heat treatment temperature is 550 DEG C, and heat treatment time is 15min, and the diameter obtaining net is 4mm; Employing diameter is that the tungsten of 0.15mm prepares spring, and the diameter of spring is 0.3mm; Pitch is 0.5mm; Be 0.3mm by diameter, length is that the rustless steel of 500mm is arranged at spring inner as metal-cored running through; By spring together with the metal-cored inside being placed on metal net cover, with material be titanium alloy, internal diameter is 0.8mm, external diameter is 1.0mm, width is that the becket 4 of 1.2mm is by welding procedure fixing metal net 1, spring 2, metal-cored 3, technological parameter is: electric current 120A, pulsewidth 8ms, frequency, 12HZ, weld interval 10s.The maximum gauge of the netted turn of the ball-type prepared is 40mm.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a netted turn, comprises metal net cover and spring; It is outside that described metal net cover is sheathed on described spring, and described metal net cover internal diameter is greater than described spring outer diameter; Described metal net cover is memory-alloy mesh; Described spring inner run through be provided with metal-cored; Described spring, metal-cored and metal net cover are fixed at the two ends of spring.
2. netted turn according to claim 1, is characterized in that, described metal net cover material is Nitinol.
3. netted turn according to claim 1, is characterized in that, described metal net cover surface-coated has hydrophilic coating.
4. netted turn according to claim 3, is characterized in that, described hydrophilic coating is polyvinylpyrrolidone, and the thickness of described hydrophilic coating is 0.006-0.025mm.
5. netted turn according to claim 1, is characterized in that, described metal net cover is prepared by memory alloy wire, and described memorial alloy filament diameter is 0.01mm ~ 0.2mm.
6. netted turn according to claim 1, is characterized in that, described spring materials is selected from the one in platinum, platinum alloy, billon or tungsten.
7. netted turn according to claim 1, is characterized in that, described metal-cored material is selected from the one in platinum alloy, billon, tungsten or rustless steel.
8. netted turn according to claim 1, is characterized in that, described netted turn naturalness is spiral or ball-type.
9. netted turn according to claim 8, is characterized in that, described netted turn naturalness width is 1 ~ 50mm.
10. a netted turn preparation method, comprising:
Be that raw material prepares metal webmaster with memorial alloy;
Described metal webmaster heat treatment is obtained metal net cover;
Spring, metal-cored and metal net cover are fixed;
Described metal net cover is sheathed on spring outside, and described metal net cover internal diameter is greater than described spring outer diameter; Described metal-cored running through is arranged at described spring inner.
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| CN201510202324.8A CN104758025A (en) | 2015-04-27 | 2015-04-27 | Mesh spring ring and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105268081A (en) * | 2015-11-10 | 2016-01-27 | 深圳麦普奇医疗科技有限公司 | Catheter for clinical intravascular interventional therapy and manufacturing method of catheter |
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| CN105268081B (en) * | 2015-11-10 | 2018-08-03 | 深圳麦普奇医疗科技有限公司 | A kind of clinical vascular intervenien therapy conduit and preparation method thereof |
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