CN215033027U - Fixture for heat setting of NITI alloy intravascular stent - Google Patents
Fixture for heat setting of NITI alloy intravascular stent Download PDFInfo
- Publication number
- CN215033027U CN215033027U CN202121291822.1U CN202121291822U CN215033027U CN 215033027 U CN215033027 U CN 215033027U CN 202121291822 U CN202121291822 U CN 202121291822U CN 215033027 U CN215033027 U CN 215033027U
- Authority
- CN
- China
- Prior art keywords
- pulley
- support
- flexible steel
- fixed
- stent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 17
- 239000000956 alloy Substances 0.000 title claims abstract description 17
- 238000009998 heat setting Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 50
- 239000010959 steel Substances 0.000 claims abstract description 50
- 230000002792 vascular Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910001000 nickel titanium Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 208000024172 Cardiovascular disease Diseases 0.000 description 2
- 241000482237 Senegalia mellifera Species 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000034994 death Effects 0.000 description 2
- 231100000517 death Toxicity 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000026106 cerebrovascular disease Diseases 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [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 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
Images
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The utility model discloses a frock clamp for heat setting of NITI alloy vascular stent, which comprises a pulley groove, a fixed pulley, a flexible steel wire, a wire tightening fixed pulley and a barb; the pulley grooves are arranged on the outer side of the support, the number of the pulley grooves is the same as that of the support circumferential support rods, and the fixed pulleys are arranged on the pulley grooves respectively; the flexible steel wire is wound on the fixed pulley and hooks the supporting rod on the same bus position of the bracket; one or more flexible steel wires hooked to the support rods by hooking hooks are provided on each support rod so that the cross section of the stent remains approximately circular when each support rod is expanded. The utility model discloses it is narrow and small not necessarily to be controlled in the support inner space that tubular product size leads to, exerts the tractive in the outside and makes the support accomplish the expansion. Additionally, the utility model discloses needn't change frock clamp many times, once hook the bracing piece and can accomplish the whole process of expansion through the tight silk many times.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a NITI alloy frock clamp for vascular support heat setting.
Background
In recent years, the number of deaths caused by cardiovascular diseases is increased year by year, the mortality rate is higher than that of tumors and other diseases, the deaths are the first in China and become healthy first killers, and at present, intracavity stent implantation is the most common method for treating cardiovascular and cerebrovascular diseases. The metal stent uses biomedical metal or alloy as raw material, wherein the nickel-titanium alloy is a shape memory alloy which is a special alloy capable of automatically restoring the self plastic deformation to the original shape at a certain specific temperature. The expansion and contraction rate of the stainless steel is more than 20%, the fatigue life of the stainless steel reaches 7 th power of 1 x 10, the damping characteristic of the stainless steel is 10 times higher than that of a common spring, and the corrosion resistance of the stainless steel is superior to that of the best medical stainless steel at present, so that the stainless steel can meet the application requirements of various engineering and medicine, and is a very excellent functional material. Besides the unique shape memory function, the composite material also has the excellent characteristics of wear resistance, corrosion resistance, high damping, super elasticity and the like.
In order to save cost, the nitinol metal stent generally adopts a thin tube to be subjected to laser cutting treatment, and then is subjected to expansion and heat treatment for several times so as to reach the required size. At present, one end of the nickel-titanium alloy metal stent is inserted into a metal vascular stent for expansion in production, and the nickel-titanium alloy metal stent has higher rigidity and larger friction force with the wall of the metal vascular, so that the force is hard to push, and the cylinder is not easy to enter. In addition, for some thin-diameter nickel-titanium alloy intravascular stents, the corresponding expanded cylinders are thin, and in the insertion process, the uniform stress cannot be guaranteed by hands, so that the cylinders are easy to deform and bend, the machining efficiency is low, and the requirements of common machine tool fixtures cannot be met. Therefore, the nickel-titanium alloy tool clamp for the heat setting of the intravascular stent is provided.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a NITI alloy frock clamp for vascular support heat setting.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a NITI alloy vascular stent heat-setting tool clamp comprises a pulley groove, a fixed pulley, a flexible steel wire, a wire tightening fixed pulley and a barb; the pulley grooves are arranged on the outer side of the support, the number of the pulley grooves is the same as that of the support circumferential support rods, and the fixed pulleys are arranged on the pulley grooves respectively; the flexible steel wire is wound on the fixed pulley and hooks the supporting rod on the same bus position of the bracket; one or more flexible steel wires hooked to the support rods by hooking hooks are provided on each support rod so that the cross section of the stent remains approximately circular when each support rod is expanded.
Further, when the stent is expanded, the diameter of the excircle formed by the pulley grooves is 5-50 times of the diameter of the stent, so that enough operating space is reserved on the periphery of the stent.
Furthermore, the included angle between two adjacent pulley grooves can be changed by adjusting the pulley grooves so as to adapt to the brackets with different numbers of supporting rods.
Further, the length of the pulley groove should be as long as possible to satisfy the expansion of the longer stent. The fixed pulleys are arranged in the pulley grooves, the number of the fixed pulleys is a multiple of that of the support bodies, each fixed pulley is wound with one flexible steel wire, and the fixed pulleys in the pulley grooves play a role in changing the stress direction of the steel wires; one or more flexible steel wires hooked on the support rods through hooks are arranged on each support body, so that the stent is kept consistent in the axial direction when each support body is expanded, and the overall cylindrical shape is kept.
Further, a gap is reserved between the pulley groove top and the fixed pulley, so that the flexible steel wire can pass through the gap; the flexible steel wires on the fixed pulleys at the same positions on each pulley groove are wound together after being pulled out, namely the flexible steel wires on each No. 1 fixed pulley in No. 1-12 pulley grooves are wound together and fixed on the wire tightening fixed pulley 1 after being pulled out; and after being pulled out, the flexible steel wires on each No. 2 fixed pulley are wound together and fixed on the wire tightening fixed pulley 2, and so on.
Further, the distance between the fixed pulleys at the two ends of the pulley groove is determined according to the length of the stent which needs to be expanded. One side of the flexible steel wire is wound and fixed on the wire tightening fixed pulley, and the other side of the flexible steel wire is designed into a hook thorn at the tail end and is hooked on the supporting rod through the hook thorn to play a role in fixing.
Further, the flexible steel wire can be perpendicular to the supporting rod by adjusting the pulley groove and the fixed pulley.
Further, the diameter of the flexible steel wire is 0.05mm-2 mm; the number of the wire tightening fixed pulleys is the same as that of the fixed pulleys in each pulley groove, the wire tightening fixed pulleys are arranged on an extension line of the axis of the support, and the wire tightening fixed pulleys are rotated to enable the flexible steel wires in the same group to pull the support rods, so that the support is expanded. The wire tensioning fixed pulley is used for tensioning the wires in a left-handed mode and in a right-handed mode or in a right-handed mode and in a left-handed mode.
Further, in order to prevent the steel wires from being mutually bound, other devices (such as fixed pulleys and the like) can be additionally arranged between the fixed pulleys in the pulley grooves and the wire tightening fixed pulleys to change the layout of the wires.
The utility model discloses following beneficial effect has:
1. the utility model is not limited by the narrow space inside the stent caused by the size of the tube, and the stent is expanded by applying traction on the outer side;
2. the utility model does not need to change the work fixture for many times, and the whole process of expansion can be completed by tightening the wires for many times by hooking the support rod for one time;
3. the brackets with different sizes can be suitable for the utility model;
4. the utility model discloses a fixed pulley sets up at the pulley groove for the expansion in-process, the bracing piece keeps parallel with the axis, makes the support whole keep cylindrically.
5. The utility model discloses a tight silk fixed pulley, because it is rotary motion, it is more laborsaving to compare in sharp pulling.
Drawings
FIG. 1 is a general schematic view of a NITI alloy intravascular stent heat-setting tool clamp provided by the utility model;
FIG. 2 is a top view of the NITI alloy intravascular stent heat-setting tool clamp provided by the utility model;
FIG. 3 is a schematic view of a pulley groove structure;
fig. 4 is a schematic view of a barb.
Reference numerals: 1-pulley groove; 2-fixed pulley; 3-flexible steel wire; 4-a scaffold; 5-wire tensioning fixed pulley; 6-hook thorn.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses a support mainly comprises bracing piece and connecting rod, mainly depends on the deformation of bracing piece during the support expansion, so hook the bracing piece tractive with the barb and make the support accomplish the expansion.
As shown in fig. 1-4, a tool clamp for heat setting of an NITI alloy intravascular stent comprises a support rod, a pulley groove 1, a fixed pulley 2, a flexible steel wire 3, a wire tightening fixed pulley 5 and barbs 6; the pulley grooves 1 are multiple and are arranged on the outer side of the bracket; the number of the pulley grooves 1 is the same as that of the support circumferential support rods, and the fixed pulleys 2 are respectively arranged on the pulley grooves 1; the flexible steel wire 3 is wound on the fixed pulley 2 and hooks the supporting rod on the same bus position of the bracket; one or more flexible steel wires 3 hooked to the support rods by hooking are provided on each support rod so that the cross section of the stent remains approximately circular when each support rod is expanded.
In this embodiment, when the stent is expanded, the diameter of the outer circle formed by the pulley grooves 1 is 5-50 times of the diameter of the stent, so as to reserve enough operating space on the periphery of the stent.
In this embodiment, the included angle between two adjacent pulley grooves 1 can be changed by adjusting the pulley grooves 1 to adapt to the brackets with different numbers of support rods.
In this embodiment, the length of the pulley groove 1 should be as long as possible to satisfy the expansion of a longer stent; the fixed pulleys 2 are arranged in the pulley grooves 1, the number of the fixed pulleys 2 is multiple of that of the supporting bodies, each fixed pulley 2 is wound with one flexible steel wire, and the fixed pulleys 2 in the pulley grooves 1 play a role in changing the stress direction of the steel wires; one or more flexible steel wires 3 are arranged on each support body through hook-and-loop hooks 6, so that the stent is consistent in the axial direction when each support body is expanded, and the overall cylindrical shape is maintained.
In the embodiment, a gap is reserved between the top of the pulley groove 1 and the fixed pulley 2, so that the flexible steel wire 3 can pass through the gap; the flexible steel wires 3 on the fixed pulleys 2 at the same positions on each pulley groove 1 are wound together after being pulled out, namely the flexible steel wires 3 on each No. 1 fixed pulley 2 in the No. 1-12 pulley grooves 1 are wound together and fixed on the wire tightening fixed pulley 5 after being pulled out; the flexible steel wire 3 on each No. 2 fixed pulley 2 is drawn out and then wound together to be fixed on the wire tightening fixed pulley 5, and so on.
In this embodiment, the distance between the fixed pulleys 2 at the two ends of the pulley groove 1 is determined according to the length of the stent which needs to be expanded. One side of the flexible steel wire 3 is wound and fixed on the wire tightening fixed pulley 5, the other side of the flexible steel wire is designed into a barb 6 at the tail end, and the supporting rod is hooked out through the barb 6 to play a role in fixing.
In this embodiment, before the bracket is installed, the pulley groove 1 is in a movable state, and the flexible steel wire 3 can be perpendicular to the support rod by adjusting the pulley groove 1 and the fixed pulley 2.
In the present embodiment, the diameter of the flexible steel wire 3 is 0.05mm-2 mm; the number of the wire tightening fixed pulleys 5 is the same as that of the fixed pulleys 2 in each pulley groove 1, the wire tightening fixed pulleys 5 are arranged on an extension line of the axis of the support, and the wire tightening fixed pulleys 5 are manually rotated to enable the flexible steel wires 3 in the same group to draw the support rod, so that the support is expanded. The specified relation of the number of turns and the expansion distance can be realized by controlling the diameter of the wire tightening fixed pulley 5, for example, the wire tightening fixed pulley rotates for one turn to expand for 1mm, 2mm, 4mm and the like. The wire tensioning fixed pulley 5 is a left-handed loose wire and a right-handed tight wire, or a right-handed loose wire and a left-handed tight wire.
In this embodiment, in order to prevent the steel wires 3 from getting caught on each other, other devices (such as fixed pulleys) can be added between the fixed pulley 2 and the wire-tightening fixed pulley 5 in the pulley groove 1 to change the wire layout.
The specific implementation steps are as follows:
1. after the support is installed to the position, make flexible steel wire hook after the bracing piece can be perpendicular with the bracing piece through adjustment pulley groove 1 and fixed pulley 2 to the support atress is reasonable, warp evenly.
2. The end of the flexible steel wire barb 6 is operated to hook the support rod of the support, and the flexible steel wire is tightened up by manually rotating the wire tightening fixed pulley 5 to prepare for the expansion of the support.
3. By further manually rotating the tension wire fixed pulley 5, the stent is expanded by a certain distance.
4. And carrying out heat treatment on the bracket.
5. And the third and fourth steps are cycled until the stent reaches the size expected by us.
6. The stent cross section is optimized by inserting a cylinder and performing heat treatment again, so that the stent becomes cylindrical.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (6)
1. The utility model provides a NITI alloy frock clamp for vascular support heat finalization which characterized in that: comprises a supporting rod, a pulley groove (1), a fixed pulley (2), a flexible steel wire (3), a wire tightening fixed pulley (5) and a barb (6); the pulley grooves (1) are arranged on the outer side of the support, and the fixed pulleys (2) are respectively arranged on the pulley grooves (1); the flexible steel wire (3) is wound on the fixed pulley (2) and hooks the supporting rod on the same bus position of the bracket; one or more flexible steel wires (3) hooked to the support rods by hooking are provided on each support rod so that the cross section of the stent remains approximately circular when each support rod is expanded.
2. The NITI alloy intravascular stent heat-setting tool clamp as claimed in claim 1, wherein: when the stent is expanded, the diameter of an excircle formed by the pulley grooves (1) is 5-50 times of the diameter of the stent.
3. The NITI alloy intravascular stent heat-setting tool clamp as claimed in claim 1, wherein: the fixed pulleys (2) are arranged in the pulley grooves (1), the number of the fixed pulleys (2) is a multiple of the number of the supporting bodies, each fixed pulley (2) is wound with one flexible steel wire, and the fixed pulleys (2) in the pulley grooves (1) play a role in changing the stress direction of the steel wires; one or more flexible steel wires (3) are arranged on each support body, so that the stent is kept consistent in the axial direction when each support body is expanded, and the overall cylindrical shape is kept.
4. The NITI alloy intravascular stent heat-setting tool clamp as claimed in claim 1, wherein: a gap is reserved between the top of the pulley groove (1) and the fixed pulley (2), so that the flexible steel wire (3) can pass through the gap; the flexible steel wires (3) on the fixed pulleys (2) at the same position on each pulley groove (1) are wound together after being drawn out.
5. The NITI alloy intravascular stent heat-setting tool clamp as claimed in claim 1, wherein: one side of the flexible steel wire (3) is wound and fixed on the wire tightening fixed pulley (5), the other side of the flexible steel wire is designed into a barb (6) at the tail end, and the supporting rod is hooked out through the barb (6) to play a role in fixing.
6. The NITI alloy intravascular stent heat-setting tool clamp as claimed in claim 1, wherein: the diameter of the flexible steel wire (3) is 0.05mm-2 mm; the number of the wire tightening fixed pulleys (5) is the same as that of the fixed pulleys (2) in each pulley groove (1), and the wire tightening fixed pulleys (5) are arranged on an extension line of the axis of the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121291822.1U CN215033027U (en) | 2021-06-09 | 2021-06-09 | Fixture for heat setting of NITI alloy intravascular stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121291822.1U CN215033027U (en) | 2021-06-09 | 2021-06-09 | Fixture for heat setting of NITI alloy intravascular stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215033027U true CN215033027U (en) | 2021-12-07 |
Family
ID=79205238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121291822.1U Expired - Fee Related CN215033027U (en) | 2021-06-09 | 2021-06-09 | Fixture for heat setting of NITI alloy intravascular stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215033027U (en) |
-
2021
- 2021-06-09 CN CN202121291822.1U patent/CN215033027U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10716549B2 (en) | Medical device for treating a target site | |
| RU2010106644A (en) | CABLE LOCKING DEVICE HAVING REPEATING SECTIONS OF THE INCREASED VOLUME, SEPARATED BY THE PARTICIPATION SITES | |
| US5814063A (en) | Stent for placement in a body tube | |
| CN101933850B (en) | Stopper and manufacturing method thereof | |
| WO2016149998A1 (en) | Use of safe valve scaffold and valve replacement device with valve scaffold | |
| CN104689379B (en) | A kind of Weaving type is integrally formed blood vessel covered stent and preparation method thereof | |
| CN104605909A (en) | Plugging device, manufacturing method for plugging device and woven mesh pipe for manufacturing plugging device | |
| CN1257416A (en) | Self-expanding endoprosthesis | |
| JP2002535075A5 (en) | ||
| US8998975B2 (en) | Helical stent with orthogonal end and method of forming stent | |
| CN102740799A (en) | Vascular remodeling device | |
| JPH09509871A (en) | Malleable penis prosthesis | |
| WO2017071231A1 (en) | Lumen woven support | |
| CN102178569B (en) | Controlled release vena cava filter and processing method thereof | |
| CN201814682U (en) | Occluder | |
| CN105455922A (en) | Plugging device and manufacturing method thereof | |
| CN215033027U (en) | Fixture for heat setting of NITI alloy intravascular stent | |
| WO2017206155A1 (en) | Weaving method for nasal sinus stent and stent obtained thereof | |
| US8852269B2 (en) | Closed loop filament stent | |
| CN208067196U (en) | Angiocarpy bracket NiTi silk thread former | |
| CN204766039U (en) | Development support | |
| CN106507858B (en) | A kind of metal rubber material weaving method for weaving device based on radial | |
| CN216535653U (en) | Cavity support | |
| CN109199657B (en) | Self-expanding bifurcation lumen stent and manufacturing method thereof | |
| CN220213160U (en) | Nickel-titanium bracket system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211207 |