CN210125090U - Nickel-titanium alloy guide wire in blood vessel - Google Patents
Nickel-titanium alloy guide wire in blood vessel Download PDFInfo
- Publication number
- CN210125090U CN210125090U CN201920141513.2U CN201920141513U CN210125090U CN 210125090 U CN210125090 U CN 210125090U CN 201920141513 U CN201920141513 U CN 201920141513U CN 210125090 U CN210125090 U CN 210125090U
- Authority
- CN
- China
- Prior art keywords
- nickel
- titanium alloy
- welding
- stainless steel
- wire
- 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.)
- Active
Links
Images
Abstract
The utility model discloses an intravascular nickel-titanium alloy guide wire, including nickel-titanium alloy silk and the nonrust steel pipe of coaxial setting, be provided with on the nickel-titanium alloy silk insert extremely step in the stainless steel pipe, the step with nonrust steel pipe is through a plurality of solder joint welded connection, and a plurality of the solder joint is all not on same cross-section. The utility model has the advantages that: welding of nickel-titanium alloy and stainless steel can be achieved without filler, welding spots are arranged in a spiral mode, the fact that the section is continuously and intensively heated to form a brittle fault can be avoided, a heat affected zone is controlled in the welding process, the heat affected zone of the nickel-titanium alloy is small, and super elasticity of the nickel-titanium alloy is prevented from being damaged.
Description
Technical Field
The utility model relates to a seal wire technical field particularly, relates to an endovascular nickel titanium alloy seal wire.
Background
The guide wire has the functions of firstly passing through an intravascular channel, a branch and a tortuous part after entering a vascular cavity, sometimes needing to break through a narrow part to reach a target part, and guiding other interventional medical devices such as a catheter, a micro-catheter and the like to the corresponding part or area in the intravascular interventional diagnosis and treatment process. The guide wire can play an irreplaceable guiding role when selectively entering coronary artery of coronary heart disease, intracranial small cerebral artery, vascular malformation, small blood supply vessel in tumor, and the like.
Chinese patent with application number CN201610071913 discloses an intravascular nitinol guide wire, a guide wire welding tool and a guide wire welding method, wherein the guide wire is formed by welding a nitinol wire and a stainless steel wire, and the chinese patent has the following disadvantages:
1) when the nickel-titanium alloy wire and the stainless steel wire are welded, fillers are needed to assist welding, and the filler components are not clear, so that for an interventional instrument, too much undefined substances are introduced, and the body of a patient can be affected;
2) when the nickel-titanium alloy wire and the stainless steel wire are welded, the nickel-titanium alloy wire and the stainless steel wire can be welded on the connecting surface after the nickel-titanium alloy wire and the stainless steel wire are assembled according to the circumference, and the section can be continuously and intensively heated to form a brittle fracture layer in this way, so that the guide wire is easily brittle and broken;
3) the super elasticity of the nickel-titanium alloy can be destroyed if the welding temperature is too high when the nickel-titanium alloy wire and the stainless steel wire are welded.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem among the correlation technique, the utility model provides an endovascular nickel titanium alloy seal wire can avoid using the filler, can solve the problem of nickel titanium alloy and the easy brittle failure of stainless steel welding, can solve the problem of the too high fusion welding temperature in the welding process.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
an intravascular nickel-titanium alloy guide wire comprises a nickel-titanium alloy wire and a stainless steel tube which are coaxially arranged, wherein a step inserted into the stainless steel tube is arranged on the nickel-titanium alloy wire, the step and the stainless steel tube are connected through a plurality of welding spots in a welding mode, and the plurality of welding spots are not on the same cross section.
Further, the diameter of the step is 0.01mm smaller than the inner diameter of the stainless steel pipe, and the length range of the step is 10mm-20 mm.
Furthermore, a plurality of welding spots are spirally arranged, and the axial distance between every two adjacent welding spots is at least 0.5 mm.
The utility model also discloses a welding method of nickel titanium alloy seal wire in blood vessel, including following step:
s1, processing a step matched with a stainless steel pipe at the end part of the nickel-titanium alloy wire, and inserting the step into the stainless steel pipe to enable the nickel-titanium alloy wire and the stainless steel pipe to be coaxially assembled;
s2, welding the step and the stainless steel tube through a plurality of welding points, and ensuring that the welding points are not on the same section.
Further, the diameter of the step is 0.01mm smaller than the inner diameter of the stainless steel pipe, and the length range of the step is 10mm-20 mm.
Furthermore, a plurality of welding spots are spirally arranged, and the axial distance between every two adjacent welding spots is at least 0.5 mm.
Further, in S2, it is required to ensure that the heat affected zone area of each welding point is only within 20% of the cross-sectional area of the nitinol wire where the welding point is located during welding.
Furthermore, the heat affected depth of the welding point to the nickel-titanium alloy wire is within 0.05mm, and the heat affected zone of the welding point to the nickel-titanium alloy wire is 0.1mm2Within.
Further, in S2, inert gas is used as shielding gas during welding, the temperature range of the shielding gas is minus 5 ℃ to 10 ℃, the gas outlet rate of the shielding gas is 20L/min to 50L/min, and the environment humidity is ensured to be lower than 20% during welding.
Further, the shielding gas starts to blow for pre-protection 1s-3s before welding and continues to blow for 2s-5s after welding is finished.
The utility model has the advantages that: welding of nickel-titanium alloy and stainless steel can be achieved without filler, welding spots are arranged in a spiral mode, the fact that the section is continuously and intensively heated to form a brittle fault can be avoided, a heat affected zone is controlled in the welding process, the heat affected zone of the nickel-titanium alloy is small, and super elasticity of the nickel-titanium alloy is prevented from being damaged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of an intravascular nitinol guidewire according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of the nitinol guidewire in the vessel of FIG. 1;
FIG. 3 is an enlarged view at B of the nitinol guidewire in the blood vessel shown in FIG. 2;
fig. 4 is an elevation view of a solder joint distribution according to an embodiment of the present invention;
fig. 5 is a side view of a solder joint distribution according to an embodiment of the present invention;
fig. 6 is a first schematic diagram illustrating the relationship between the focal position and the size of the heat affected zone according to an embodiment of the present invention;
fig. 7 is a second schematic diagram illustrating the relationship between the focal position and the size of the heat affected zone according to an embodiment of the present invention.
In the figure:
1. nickel-titanium alloy wire; 2. a step; 3. a stainless steel tube; 4. welding spots; 5. a heat-affected zone; 6. a focal point.
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 all belong to the protection scope of the present invention.
As shown in fig. 1-7, according to the embodiment of the present invention, an intravascular nitinol guidewire comprises a nitinol wire 1 and a stainless steel tube 3 which are coaxially disposed, wherein a step 2 is disposed on the nitinol wire 1 and inserted into the stainless steel tube 3, the step 2 is connected to the stainless steel tube 3 by a plurality of welding spots 4, and the welding spots are not disposed on the same cross section.
In a specific embodiment of the present invention, the diameter of the step 2 is 0.01mm smaller than the inner diameter of the stainless steel tube 3, and the length of the step 2 ranges from 10mm to 20 mm.
In a specific embodiment of the present invention, a plurality of the welding spots 4 are spirally arranged, and the axial distance between two adjacent welding spots 4 is at least 0.5 mm.
The utility model also discloses a welding method of nickel titanium alloy seal wire in blood vessel, a serial communication port, including following step:
s1, processing a step 2 matched with a stainless steel tube 3 at the end part of a nickel-titanium alloy wire 1, and inserting the step 2 into the stainless steel tube 3 to enable the nickel-titanium alloy wire 1 and the stainless steel tube 3 to be coaxially assembled;
s2, welding the step 2 and the stainless steel tube 3 through a plurality of welding points 4, and ensuring that the welding points 4 are not on the same section.
In a specific embodiment of the present invention, the diameter of the step 2 is 0.01mm smaller than the inner diameter of the stainless steel tube 3, and the length of the step 2 ranges from 10mm to 20 mm.
In a specific embodiment of the present invention, a plurality of the welding spots 4 are spirally arranged, and the axial distance between two adjacent welding spots 4 is at least 0.5 mm.
In a specific embodiment of the present invention, in S2, it is required to ensure that the area of the heat affected zone 5 of each welding spot 4 only occupies 20% of the cross-sectional area of the nitinol wire 1 where the welding spot 4 is located during welding.
In a specific embodiment of the present invention, the heat affected depth of the welding spot 4 to the nitinol wire 1 is within 0.05mm, and the heat affected zone 5 of the welding spot 4 to the nitinol wire 1 is within 0.1mm2Within.
In a specific embodiment of the present invention, in S2, an inert gas is used as a shielding gas during welding, the temperature range of the shielding gas is-5 ℃ to-10 ℃, the gas outlet rate of the shielding gas is 20L/min to 50L/min, and the ambient humidity is lower than 20% during welding.
In a specific embodiment of the present invention, the shielding gas starts to blow for pre-protection 1s-3s before welding and continues to blow for 2s-5s after welding is finished.
For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention will be described in detail through specific use modes.
The welding method of the nickel-titanium alloy guide wire in the blood vessel comprises the following steps: assembling the nickel-titanium alloy wire 1 and the stainless steel tube 3 → determining the focal length by laser → connecting the protective gas → emitting light by laser → adjusting the positions of the stainless steel tube 3 and the nickel-titanium alloy wire 1, and repeating the steps to realize the welding of the nickel-titanium alloy wire 1 and the stainless steel tube 3.
The welding method of the nickel-titanium alloy guide wire in the blood vessel is used for butt welding of the nickel-titanium alloy part and the stainless steel part in the nickel-titanium alloy guide wire in the blood vessel.
The stainless steel part is a single-cavity stainless steel pipe 3, and the wall thickness of the stainless steel pipe is 0.05mm-0.2 mm.
The nickel-titanium alloy part is a nickel-titanium alloy wire 1, the diameter of the nickel-titanium alloy wire 1 is the same as that of the stainless steel pipe 3, a step 2 with the diameter being 0.01mm smaller than the inner diameter of the stainless steel pipe 3 is machined at the end part of the nickel-titanium alloy wire 1 through a machining method, the length range of the step 2 is 10mm-20mm, and the nickel-titanium alloy wire 1 can be concentrically assembled with the stainless steel pipe 3 through the step 2.
The step 2 and the stainless steel pipe 3 are welded by laser, and the heat affected depth of the nickel-titanium alloy wire 1 and the size of the heat affected zone 5 can be changed by changing the position of the laser focus 6.
The heat affected depth of the welding spot 4 to the nickel-titanium alloy wire 1 should be controlled within 0.05mm, and the heat affected zone 5 to the nickel-titanium alloy wire 1 should be controlled within 0.1mm during welding2Within. Therefore, the area of the heat affected zone 5 of a single welding point 4 only accounts for 20% of the cross-sectional area of the nitinol wire 1 in which the welding point 4 is located, and the distance between two adjacent welding points 4 is at least 0.5mm, so as to ensure that no heat interaction occurs between two adjacent welding points 4.
Through the mode, the area of the cross section of the nickel-titanium alloy wire 1 where each welding point 4 is located is more than 80% without being affected by heat in the welding process, and mutual heat influence cannot occur between two adjacent welding points 4, so that the super elasticity of the nickel-titanium alloy is effectively prevented from being damaged due to the fact that the nickel-titanium alloy is affected by large heat.
The humidity of the welding environment needs to be controlled to be lower than 20% in the welding process, and condensate water is prevented from being generated on the surface of a sample.
In the welding process, inert gas is used as shielding gas, and the inert gas is nitrogen, argon, helium, krypton or xenon. The protective gas is required to be kept within the range of minus 5 ℃ to 10 ℃ all the time in the welding process, the protective gas with low temperature is favorable for taking away the redundant heat generated in the welding process, the gas outlet rate of the protective gas is 20-50L/min, a higher gas outlet rate is set to be favorable for taking away the redundant heat generated in the welding process, the protective gas starts to blow for pre-protection 1s-3s before the laser emits light, and the oxygen around the welding point 4 is isolated; and after the laser light emitting is finished, the residual heat left after welding can be effectively taken away by continuously blowing for 2-5 s.
To sum up, with the aid of the above-mentioned technical scheme of the utility model, need not to pack and can realize nickel titanium alloy and stainless steel's welding, the solder joint spiral is arranged and can be avoided the tangent plane to concentrate in succession being heated and form fragile fault, controls the heat affected zone among the welding process, and the heat that makes nickel titanium alloy receive is influenced by and is avoided its superelasticity to be destroyed for a short time.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The intravascular nickel-titanium alloy guide wire is characterized by comprising a nickel-titanium alloy wire (1) and a stainless steel pipe (3) which are coaxially arranged, wherein a step (2) inserted into the stainless steel pipe (3) is arranged on the nickel-titanium alloy wire (1), the step (2) and the stainless steel pipe (3) are connected through a plurality of welding spots (4) in a welded mode, and the plurality of welding spots (4) are all not on the same section.
2. The nitinol guidewire in blood vessel according to claim 1, wherein the diameter of the step (2) is 0.01mm smaller than the inner diameter of the stainless steel tube (3), and the length of the step (2) ranges from 10mm to 20 mm.
3. The nitinol guidewire in blood vessel according to claim 2, wherein a plurality of the welding spots (4) are arranged in a spiral shape, and the axial distance between two adjacent welding spots (4) is at least 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920141513.2U CN210125090U (en) | 2019-01-28 | 2019-01-28 | Nickel-titanium alloy guide wire in blood vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920141513.2U CN210125090U (en) | 2019-01-28 | 2019-01-28 | Nickel-titanium alloy guide wire in blood vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210125090U true CN210125090U (en) | 2020-03-06 |
Family
ID=69660389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920141513.2U Active CN210125090U (en) | 2019-01-28 | 2019-01-28 | Nickel-titanium alloy guide wire in blood vessel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210125090U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109664022A (en) * | 2019-01-28 | 2019-04-23 | 康迪泰科(北京)医疗科技有限公司 | A kind of intravascular Nitinol seal wire and its welding method |
-
2019
- 2019-01-28 CN CN201920141513.2U patent/CN210125090U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109664022A (en) * | 2019-01-28 | 2019-04-23 | 康迪泰科(北京)医疗科技有限公司 | A kind of intravascular Nitinol seal wire and its welding method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1325763B1 (en) | Guide wire | |
| JP3762290B2 (en) | Medical guidewire | |
| CN103230310B (en) | Thoracic aortic aneurysm coated stent and thoracic aortic aneurysm minimally invasive treatment system | |
| EP1791589B1 (en) | Intravascular guide wire | |
| EP1610855B1 (en) | Shapeable intraluminal device and method therefor | |
| KR100186950B1 (en) | Catheter having shaft of verying stiffness | |
| JP2000500040A (en) | Improved flexible radiation source wire for local internal irradiation of tissue | |
| CN106264709B (en) | Guide catheter | |
| CN113874062A (en) | Guidewire with internal pressure sensor | |
| CN210125090U (en) | Nickel-titanium alloy guide wire in blood vessel | |
| CN214912428U (en) | Pulmonary artery balloon dilatation catheter | |
| EP0355200A1 (en) | Balloon dilatation catheter with laser cutting capability | |
| US5549580A (en) | Catheter having a flexible distal tip and method of manufacturing | |
| EP3395393A1 (en) | Guidewire made from a drawn filled tube of a sheath and a core | |
| CN105562867A (en) | Nickel-titanium alloy guiding wire in vessel, guiding wire welding tool and guiding wire welding method | |
| JPH1157014A (en) | Guide wire | |
| CN109664022A (en) | A kind of intravascular Nitinol seal wire and its welding method | |
| JP2016101194A (en) | catheter | |
| CN104524685B (en) | A kind of foley's tube | |
| CN112023230A (en) | Pulmonary artery balloon dilatation catheter | |
| JP2023511808A (en) | Dimpled joint for guide wire | |
| JP2007236633A (en) | Catheter | |
| CN109758661B (en) | Preformed guide wire for treating bifurcation lesion in blood vessel | |
| JP4463191B2 (en) | Pusher wire for indwelling members | |
| JP6978937B2 (en) | catheter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |