CN116849887A - Dense net support for treating carotid stenosis and manufacturing method thereof - Google Patents
Dense net support for treating carotid stenosis and manufacturing method thereof Download PDFInfo
- Publication number
- CN116849887A CN116849887A CN202310783678.0A CN202310783678A CN116849887A CN 116849887 A CN116849887 A CN 116849887A CN 202310783678 A CN202310783678 A CN 202310783678A CN 116849887 A CN116849887 A CN 116849887A
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- wires
- twisted
- groups
- braided
- circular tube
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 208000006170 carotid stenosis Diseases 0.000 title claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 206010007687 Carotid artery stenosis Diseases 0.000 claims abstract description 7
- 238000009954 braiding Methods 0.000 claims description 18
- 238000011282 treatment Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 238000009998 heat setting Methods 0.000 claims description 6
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000002161 passivation Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 229910000566 Platinum-iridium alloy Inorganic materials 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- HWLDNSXPUQTBOD-UHFFFAOYSA-N platinum-iridium alloy Chemical class [Ir].[Pt] HWLDNSXPUQTBOD-UHFFFAOYSA-N 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- VSSLEOGOUUKTNN-UHFFFAOYSA-N tantalum titanium Chemical compound [Ti].[Ta] VSSLEOGOUUKTNN-UHFFFAOYSA-N 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009940 knitting Methods 0.000 description 17
- 238000009826 distribution Methods 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 2
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000010147 laser engraving Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 206010048964 Carotid artery occlusion Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 210000001715 carotid artery Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000002690 local anesthesia Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2240/00—Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2240/001—Designing or manufacturing processes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention relates to a dense net support for treating carotid artery stenosis and a manufacturing method thereof, which adopts metal braided wires to braid into a circular tube structure, and the free braided wires at each of two ends of the circular tube structure are equally divided into large groups firstly and then into small groups, each small group is one strand, each strand in each large group is wound and braided into a twisted braid in a twisting mode, and a developing ring is sleeved on each twisted braid, so that the dense net support is finally obtained; the manufacturing method is simple, the existence of freely woven wires of the dense net support is eliminated, twisted braids with uniform intervals are formed at the head end and the tail end, and the developing ring sleeved on the twisted braids can improve the positioning effect and reduce the operation difficulty of doctors during release.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a dense net bracket for treating carotid stenosis and a manufacturing method thereof.
Background
Carotid stenosis or occlusion can severely block blood flow from the heart to the brain and other blood vessels in the head, and has a high incidence, especially about 9% of people suffering from carotid stenosis in people over 60 years old, and current treatments for such diseases are mainly classified into general treatments, drug treatments, carotid intima-stripping treatments and carotid stent interventions. The carotid artery stent intervention method can complete treatment under local anesthesia, has the advantages of simplicity and less trauma, and is one of effective methods for treating the diseases.
At present, the common brackets for treating carotid artery stenosis are divided into a laser engraving bracket and an integrally woven dense net bracket, wherein the two ends of the head and the tail of the laser engraving bracket are closed ends, but the flexibility of the bracket is poorer than that of the woven bracket, and the bracket is harder to enter a bent blood vessel. The integral woven dense net support has better bending resistance, but the head end and the tail end of most dense net supports are open ends, and scattered free woven wires can influence the service performance of the support.
The invention patent with publication number of CN115998500A provides a dense net support and a conveying system, wherein part of the knitting wires are broken and form at least one pair of oppositely arranged free ends, an anchor piece is arranged on each free end, and the radial dimension of the anchor piece is larger than or equal to that of the knitting wires. The anchoring piece is formed into a sphere or sphere-like structure by hot-melting the end parts of the knitting wires or wrapping the end parts of the knitting wires by glue. The anchoring piece with the ball or ball-like structure still cannot solve the problem that the usability of the dense net support is affected due to the mess of freely woven wires at the head end and the tail end of the dense net support.
Disclosure of Invention
The invention aims to provide a dense net stent for treating carotid artery stenosis and a manufacturing method thereof, and overcomes the defect that two ends of the stent are mostly open ends in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the manufacturing method of the dense net stent for treating carotid artery stenosis comprises the following steps:
step one: the metal braiding wires are adopted to form a circular tube structure, and the circular tube structure is subjected to high-temperature shaping, chemical polishing and passivation treatment, so that the remaining free braiding wires at the head end and the tail end of the circular tube structure are trimmed;
step two: dividing the freely woven wires at each of the two ends of the circular tube structure into large groups, dividing each large group into small groups equally, forming one strand of each small group, winding and braiding each strand of each large group into a twisted braid in a twisting mode, and fixing the twist of the twisted braid by adopting a stainless steel capillary tube;
step three: performing secondary heat setting on the whole circular tube structure and the twisted braid at the high temperature of 480-505 ℃ for 5-10 min, and taking out the stainless steel capillary after water cooling;
step four: and welding and reinforcing the head ends of the twisted braids by using a laser welding machine, then cleaning and drying, and sleeving developing rings on each twisted braid to finally obtain the dense net support.
In the manufacturing method, in the second step, the free braided wires at the head end and the tail end of the circular tube structure are respectively divided into 4-12 groups, each group of free braided wires is further divided into 2-3 groups, and the free braided wires divided into 2 groups are wound and braided into a double-strand twisted braid in a double-strand twisting mode; the freely woven filaments divided into 3 subgroups were twined and braided in a three-ply twisted manner into a three-ply twisted braid.
In the above manufacturing method, the metal braiding wires include thick metal braiding wires and thin metal braiding wires, and each large group includes at least one thick braiding wire.
In the manufacturing method, the dense net support is formed by weaving one or more of cobalt-chromium alloy, nickel-titanium alloy, tantalum-titanium alloy, platinum-iridium alloy, pure gold or alloy thereof.
In the manufacturing method, in the first step, the high-temperature setting temperature is 480-505 ℃.
The invention also relates to a dense net support for treating carotid artery stenosis, which is manufactured by adopting the manufacturing method.
The beneficial effects of the invention are as follows:
the dense net support with twisting ends at the head end and the tail end eliminates the existence of free braided wires by adopting a ending mode of grouping twisting the free braided wires at the head end and the tail end of the support, twist braids with uniform spacing are formed at the two ends, and a developing ring sleeved on the twist braids can provide good positioning effect in operation and reduce the operation difficulty of doctors.
The ending mode of grouping twisting at the head end and the tail end of the dense net support provided by the invention has simple process, the existence of free braided wires can be eliminated without back braiding, the support has good radial supporting force, adherence and flexibility, and meanwhile, the existence of developing rings on twisting braids at the two ends of the support can improve the positioning effect and reduce the operation difficulty of doctors.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram showing three-dimensional position distribution of 6 twist braids arranged at equal intervals and different lengths at each end and head according to an embodiment of the present invention;
FIG. 2 is a schematic plan view showing the distribution of the positions of 6 twist braids arranged at equal intervals and different lengths at each end and head according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing three-dimensional position distribution of 8 twist braids arranged at equal intervals and equal lengths at each end and head according to an embodiment of the present invention;
FIG. 4 is a schematic plan view showing the distribution of the positions of 8 twist braids arranged at equal intervals and equal lengths at the head and tail ends according to an embodiment of the present invention;
FIG. 5 is a schematic view of a partially enlarged construction of a double strand twisted braid provided in accordance with an embodiment of the present invention;
fig. 6 is a schematic view of a partially enlarged structure of a three-ply twisted braid according to an embodiment of the present invention.
Wherein the symbols in the drawings are defined as follows:
1-twisting the braid; 2-double strand twisting braid; 3-three strand twist braid; 4-developing ring
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is to be understood that the embodiments described are merely some, but not all, of the embodiments of the present invention. Further, after reading the present disclosure, those skilled in the art can make modifications without departing from the inventive concept, but these are all within the scope of the present disclosure.
Example 1
The embodiment discloses a double-strand twisting ending mode of a dense net support. As shown in fig. 1, 2 and 5, the dense net support is formed by braiding 72 braided wires with different wire diameters, and all the braided wires used in the support are nickel titanium wires.
First, determining structural parameters of the dense net support. Wherein, the total number of the knitting of the dense net support is 72, the number of the thick knitting silk is 6, and the number of the thin knitting silk is 66.
And secondly, finishing knitting in a knitting machine, and performing high-temperature heat setting treatment, chemical polishing treatment and passivation treatment. Trimming the free braided wires at the head and tail ends of the treated bracket in order, dividing each free braided wire into 6 groups, dividing each of the 6 groups into a thick braided wire, dividing each of the 12 free braided wires in each of the 6 groups into 2 groups, winding and twisting the 2 groups of free braided wires to form two strands of twisted braids, and fixing the twist by using stainless steel capillaries.
Thirdly, carrying out secondary heat setting treatment on the bracket with the twist fixed in the previous step at a high temperature of 505 ℃, taking out the stainless steel capillary after water cooling, then carrying out welding reinforcement on the tail end of the twisted braid by using a laser welding machine, cleaning and drying the bracket, sleeving a developing ring 4 on the twisted braid, and finally obtaining the dense net bracket with two strands twisted and ending at the head and tail ends.
Example two
The embodiment discloses a three-ply twisting ending mode of a dense net support. As shown in fig. 3, 4 and 6, the dense net support is formed by knitting 144 knitting wires with different wire diameters, and all the knitting wires used by the support are nickel titanium wires.
First, determining structural parameters of the dense net support. Wherein, the total number of the knitting of the dense net support is 144, the number of the thick knitting wires is 8, and the number of the thin knitting wires is 136.
And secondly, finishing knitting in a knitting machine, and performing high-temperature heat setting treatment, chemical polishing treatment and passivation treatment. Trimming the free braided wires at the head and tail ends of the treated bracket in order, dividing each free braided wire into 8 groups, dividing each of the 8 groups into a thick braided wire, dividing 18 free braided wires in the 8 groups into 3 groups, winding and twisting the 3 groups of free braided wires to form a three-ply twisted braid 3, and fixing the twist by using a stainless steel capillary tube.
Thirdly, carrying out secondary heat setting treatment on the support with the twist fixed in the previous step at a high temperature of 490 ℃, taking out the stainless steel capillary after water cooling, then carrying out welding reinforcement on the tail end of the twisted braid by using a laser welding machine, cleaning and drying the support, sleeving a developing ring 4 on the twisted braid, and finally obtaining the dense net support with three twisted ends at the head and the tail.
Referring to fig. 1 to 6, the present invention provides a ending mode of a dense net support, including: at least 4 twisting braids with uniform spacing, unequal length or equal length are respectively arranged at the head end and the tail end of the bracket. The freely woven wires at the head end and the tail end of the dense net support are terminated in a grouping twisting mode, a high-temperature fixed twisting degree mode and a laser welding reinforcing mode, 4-12 twisting braids are finally formed at each end of the support, and developing rings are sleeved outside the twisting braids.
Further, the free braided wires at the head and tail ends of the dense net support are respectively divided into 4-12 groups, then the free braided wires in the groups are respectively divided into 2-3 groups, the free braided wires divided into 2-3 groups are wound and braided into single strands in a double-strand twisting or triple-strand twisting mode, and finally 4-12 twisting braids are formed at each end of the support.
Further, the 4-12 twist braids can be distributed and sleeved with the developing rings at equal intervals and equal lengths, and can also be distributed and sleeved with the developing rings at equal intervals and different lengths.
Further, the two-end twisting ending mode is suitable for a bracket formed by braiding one or more braiding wires of cobalt-chromium alloy, nickel-titanium alloy, tantalum-titanium alloy, platinum-iridium alloy, pure gold or alloy thereof.
The invention provides a ending mode for grouping and twisting freely woven wires at the head end and the tail end of a bracket. The free braided wires scattered at the two ends of the bracket are eliminated through twisting, twisted braids with uniform intervals are formed at the two ends of the head and the tail of the bracket, good positioning can be realized due to the existence of developing rings on the twisted braids, and the operation difficulty of a doctor in releasing the dense net bracket is reduced.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the embodiments of the present invention, and any minor variations, modifications, equivalents, and improvements made to the above embodiments according to the technical principles of the present invention should be included in the scope of the technical solutions of the present invention.
Claims (6)
1. A method for manufacturing a dense net stent for treating carotid artery stenosis, comprising the steps of:
step one: the metal braiding wires are adopted to form a circular tube structure, and the circular tube structure is subjected to high-temperature shaping, chemical polishing and passivation treatment, so that the remaining free braiding wires at the head end and the tail end of the circular tube structure are trimmed;
step two: dividing the freely woven wires at each of the two ends of the circular tube-shaped structure into large groups, dividing each large group into small groups equally, forming one strand in each small group, winding and braiding each strand in each large group into a twisted braid (1) in a twisting manner, and fixing the twist of the twisted braid (1) by adopting a stainless steel capillary tube;
step three: performing secondary heat setting on the whole circular tube structure and the twisted braid at the high temperature of 480-505 ℃ for 5-10 min, and taking out the stainless steel capillary after water cooling;
step four: and welding and reinforcing the head ends of the twisted braids by using a laser welding machine, then cleaning and drying, and sleeving developing rings on each twisted braid to finally obtain the dense net support.
2. The method according to claim 1, wherein in the second step, the free braided wires at the head end and the tail end of the circular tube structure are respectively divided into 4-12 groups, each group of free braided wires is divided into 2-3 groups, and the free braided wires divided into 2 groups are wound and braided into a double-strand twisted braid (2) in a double-strand twisting manner; the free braided filaments divided into 3 subgroups are twined and braided in a three-ply twisting manner into a three-ply twisted braid (3).
3. The method of claim 1, wherein the metal braiding wires comprise thick metal braiding wires and thin metal braiding wires, and each of the large groups comprises at least one thick braiding wire.
4. The method of claim 1, wherein the dense mesh stent is woven from one or more of cobalt-chromium alloy, nickel-titanium alloy, tantalum-titanium alloy, platinum-iridium alloy, pure gold, or alloys thereof.
5. The method according to claim 1, wherein in the first step, the high-temperature setting temperature is 480 ℃ to 505 ℃.
6. A dense mesh stent for treating carotid artery stenosis, wherein the dense mesh stent is fabricated using the fabrication method of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310783678.0A CN116849887A (en) | 2023-06-29 | 2023-06-29 | Dense net support for treating carotid stenosis and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310783678.0A CN116849887A (en) | 2023-06-29 | 2023-06-29 | Dense net support for treating carotid stenosis and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116849887A true CN116849887A (en) | 2023-10-10 |
Family
ID=88227871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310783678.0A Pending CN116849887A (en) | 2023-06-29 | 2023-06-29 | Dense net support for treating carotid stenosis and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116849887A (en) |
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2023
- 2023-06-29 CN CN202310783678.0A patent/CN116849887A/en active Pending
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