CN115068789B - Smooth heterogeneous metal core guide wire - Google Patents
Smooth heterogeneous metal core guide wire Download PDFInfo
- Publication number
- CN115068789B CN115068789B CN202111232088.6A CN202111232088A CN115068789B CN 115068789 B CN115068789 B CN 115068789B CN 202111232088 A CN202111232088 A CN 202111232088A CN 115068789 B CN115068789 B CN 115068789B
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- Prior art keywords
- core wire
- core
- nickel
- wire
- titanium tube
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- 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.)
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 16
- 239000002184 metal Substances 0.000 title claims abstract description 16
- 229910001000 nickel titanium Inorganic materials 0.000 claims abstract description 62
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 claims abstract description 45
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000005476 soldering Methods 0.000 claims abstract description 18
- 210000004204 blood vessel Anatomy 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims description 11
- 239000010935 stainless steel Substances 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract description 2
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical group [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 13
- 238000003466 welding Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 229910002593 Fe-Ti Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000013152 interventional procedure Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M25/09016—Guide wires with mandrils
- A61M25/09033—Guide wires with mandrils with fixed mandrils, e.g. mandrils fixed to tip; Tensionable wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09175—Guide wires having specific characteristics at the distal tip
Abstract
The invention discloses a smooth heterogeneous metal core guide wire, which comprises a first core wire and a second core wire, wherein a nickel-titanium tube is sleeved on the outer surface of one end of the first core wire, which is opposite to the second core wire, and the first core wire and the second core wire are fixed through the nickel-titanium tube, and a metal coil is arranged on the outer surface of the second core wire; the second core wire is assembled on the outer surface of the other end of the second core wire, and the other end of the second core wire is assembled with a round head for preventing the blood vessel from being damaged. After the first core wire and the second core wire are connected, the first core wire and the second core wire are welded through soldering tin, and the outer diameter of the soldering tin is consistent with the outer diameter of the nickel-titanium tube after grinding, so that no obvious outer diameter change area exists in a connecting tube area, and the mechanical property of the guide wire such as supporting force is smooth in transition in the connecting area. In addition, no obvious hollow area exists in the nickel-titanium tube, no supporting force fragile point exists on the core wire in the nickel-titanium tube and the adjacent area, and the outer diameter of the joint is kept consistent, so that the torque transmission is better.
Description
Technical Field
The invention relates to the field of medical appliances, in particular to a smooth heterogeneous metal core guide wire.
Background
In minimally invasive interventional procedures, a guidewire has the effect of establishing a passageway for other medical devices, such as catheters, stents, and the like. A practical performance requirement for a guidewire is that, first, the guidewire should have sufficient axial strength to be successfully delivered to the intravascular target site without kinking. On the other hand, the guidewire also needs to be sufficiently flexible to avoid damaging the vessel as it is advanced within the vessel. However, for the same material, compliance and support are often two properties of the elbow made with each other, and the excellent one often implies a disadvantage of the other. Nickel titanium alloy materials are used as guidewire distal core wire materials for superelasticity and shape memory to provide good compliance to the guidewire distal end; stainless steel materials are used for the guidewire proximal core wire material because of their high yield strength and young's modulus to provide strong support and pushability. How to connect nitinol and stainless steel core wires is a critical issue.
Existing methods for connecting nickel-titanium core wires and stainless steel core wires mainly comprise two types, namely a connecting pipe connecting method and a butt welding method. In the prior art, the connecting pipe connecting method is used, so that the mechanical properties of the connecting pipe position and the adjacent area are unstable because one end of the core wire needs to be grinded into a cone shape in advance and the hollow part of the coreless wire exists in the pipe, and the clinical performance can be influenced. The butt welding technology needs to overcome the defects that brittle Fe-Ti intermetallic compounds are easy to occur in a welding area, so that brittle fracture is easy to occur at a welding part, and core wires are difficult to be coaxial and the like, so that the technology is complex and high in cost.
The existing wire guiding technology for connecting core wires with different materials at two ends through a connecting pipe is generally connected with the connecting pipe after the connecting area of the core wires is ground into a cone shape, so that the outer diameter of the core wires is uneven near the connecting pipe, in addition, the hollow core of a coreless wire section can appear in the center of the connecting pipe, obvious strength weak points exist at the position with thinner outer diameter and the hollow core of the connecting pipe, and the clinical performance can be influenced.
In the method for welding and forming the medical guide wire and the head end thereof provided by CN111805108A, the connecting tube connecting method is used, and because one end of the core wire needs to be grinded into a cone shape in advance and a hollow part without the core wire exists in the tube, the mechanical properties of the connecting tube position and the adjacent area are unstable, and the clinical performance may be affected.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a smooth dissimilar metal core guide wire.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the smooth dissimilar metal core guide wire comprises a first core wire and a second core wire, wherein nickel-titanium tubes are sleeved on the outer surfaces of opposite ends of the first core wire and the second core wire, and the first core wire and the second core wire are fixed through the nickel-titanium tubes, and a metal coil is arranged on the outer surfaces of the opposite ends of the first core wire and the second core wire; the second core wire is assembled on the outer surface of the other end of the second core wire, and the other end of the second core wire is assembled with a round head for preventing the blood vessel from being damaged.
As a further description of the above technical solution: the first core wire is made of stainless steel.
As a further description of the above technical solution: the second core wire is made of nickel-titanium alloy.
As a further description of the above technical solution: the opposite ends of the first core wire and the second core wire are stepped.
As a further description of the above technical solution: the cross section of the opposite ends of the first core wire and the second core wire is the same as the cross section of the inner circle of the nickel-titanium tube.
As a further description of the above technical solution: the stepped outer surface is engaged with the inner surface of the nitinol tube.
As a further description of the above technical solution: the opposite ends of the first core wire and the second core wire are attached.
As a further description of the above technical solution: the section of the excircle of the nickel-titanium tube is the same as the section of the core guide wire.
As a further description of the above technical solution: and the two ends of the nickel-titanium tube are provided with soldering tin fillers.
As a further description of the above technical solution: the outer surfaces of the soldering tin fillers are attached to the opposite ends of the first core wire and the second core wire.
The invention has the following beneficial effects:
1. according to the invention, one end of the first core wire opposite to the second core wire is ground into a step shape, the step height is the same as the inner diameter of the nickel-titanium tube, so that the first core wire can be in contact with the nickel-titanium tube, the step head ends of one side of the first core wire opposite to the second core wire are in contact with each other, the two sections of core wires are connected through the nickel-titanium tube, wherein the metal coil is sleeved at the distal end of the guide wire, the distal end of the guide wire is a circular head for placing a damaged blood vessel, and the direct butt joint between the nickel-titanium tube and the core wires is effectively ensured, the difference is that one end of the first core wire opposite to the second core wire is ground into a cone shape, the outer diameter of the flat section is slightly larger than the inner diameter of the nickel-titanium tube, and the first core wire and the second core wire are respectively firmly embedded before welding by applying a certain embedding force. And then improved the holistic intensity of seal wire to reduced the operation degree of difficulty, improved medical personnel's work efficiency.
2. After the first core wire and the second core wire are connected, the first core wire and the second core wire are welded through soldering tin, and the outer diameter of the soldering tin is consistent with the outer diameter of the nickel-titanium tube after grinding, so that no obvious outer diameter change area exists in a connecting tube area, and the mechanical property of the guide wire such as supporting force is smooth in transition in the connecting area. In addition, no obvious hollow area exists in the nickel-titanium tube, no supporting force fragile point exists on the core wire in the nickel-titanium tube and the adjacent area, and the outer diameter of the joint is kept consistent, so that the torque transmission is better.
Drawings
FIG. 1 is a schematic view of the external structure of a smooth dissimilar metal core guide wire according to the present invention;
FIG. 2 is a schematic view of the internal structure of a smooth hetero-metallic core guide wire according to the present invention;
fig. 3 is a side view of the internal structure of a smooth hetero-metallic core guidewire according to the present invention.
Legend description: 11. a first core wire; 12. a second core wire; 2. a nickel titanium tube; 3. a metal coil; 4. a circular head; 5. and (5) soldering tin filler.
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 apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present invention; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-3, one embodiment provided by the present invention is: a smooth dissimilar metal core guide wire comprises a first core wire 11 and a second core wire 12, wherein a nickel-titanium tube 2 is sleeved on the outer surface of the opposite ends of the first core wire 11 and the second core wire 12, the first core wire 11 and the second core wire 12 are fixed through the nickel-titanium tube 2, and a metal coil 3 is arranged on the outer surface of the opposite ends of the first core wire 11 and the second core wire 12; is assembled on the outer surface of the other end of the second core wire 12, and the other end of the second core wire 12 is assembled with a round head 4 for preventing the blood vessel from being damaged.
The guide wire is formed by combining two core wires made of different materials, namely the core wires made of stainless steel and nickel-titanium alloy, and the two sections of core wires are connected through a nickel-titanium tube 2, wherein a metal coil 3 is sleeved at the distal end of the guide wire, and the distal end of the guide wire is a round head 4 for preventing blood vessels from being damaged. As shown in fig. 2, the interface diagram of the nitinol tube region is that the opposite sides of the first core wire 11 and the second core wire 12 are respectively ground into a step shape, and the step head end is close to the inner diameter of the nitinol tube 2, so that the nitinol tube 2 can be in contact and jogged with the step head end of the opposite sides of the first core wire 11 and the second core wire 12. The outer diameter of the two sections of core wires is the same as the outer diameter of the connecting pipe. The soldering tin filler 5 is added to the opposite side of the nickel-titanium tube 2 to the first core wire 11 and the second core wire 12, and a laser welding mode is adopted, so that the nickel-titanium tube 2 and the first core wire 11 and the second core wire 12 are firmly connected, no obvious gap exists at the joint, and the outer diameter of the soldering tin position is consistent with the outer diameter of the nickel-titanium tube 2 through grinding.
Referring to fig. 2-3, one embodiment provided by the present invention is: the first core wire 11 is made of stainless steel.
The second core wire 12 is made of nickel-titanium alloy.
Opposite ends of the first core wire 11 and the second core wire 12 are stepped.
The cross section of the opposite ends of the first core wire 11 and the second core wire 12 is the same as the cross section of the inner circle of the nitinol tube 2.
The stepped outer surface is fitted to the inner surface of the nitinol tube 2.
The opposite ends of the first core wire 11 and the second core wire 12 are attached.
Based on the above embodiment, the difference is that the inside of the nitinol tube 2 is coated with an adhesive, so that the inside of the nitinol tube 2 is adhesively fastened with the first core wire 11 and the second core wire 12, thereby increasing the connection strength.
Referring to fig. 2-3, one embodiment provided by the present invention is: the section of the excircle of the nickel-titanium tube 2 is the same as the section of the core guide wire 1.
Both ends of the nitinol tube 2 are fitted with a solder filler 5.
Based on the above embodiment, the difference is that the first core wire 11 and the second core wire 12 are connected with the nickel titanium tube 2 by soldering tin by adding the soldering tin filler 5 at the edges of the tube materials.
Referring to fig. 3, one embodiment provided by the present invention: the outer surfaces of the solder filler 5 are attached to opposite ends of the first core wire 11 and the second core wire 12.
Based on the above embodiment, the difference is that the opposite ends of the first core wire 11 and the second core wire 12 are grinded to be conical, the outer diameter of the straight section is slightly larger than the inner diameter of the nickel titanium tube 2, and the first core wire 11 and the second core wire 12 are firmly embedded with the 3 respectively before welding by applying a certain embedding force. Thus, the fitting strength other than the welding strength can be provided.
Working principle: the staff is through the seal wire that two kinds of core wires of different materials make up, and two sections core wires are connected through nickel titanium pipe 2, and wherein the metal coil 3 is established to the cover of seal wire distal end, and the seal wire distal end is the circular head 4 of atraumatic blood vessel. As shown in fig. 2, the interface diagram of the nitinol tube region is that the opposite sides of the first core wire 11 and the second core wire 12 are respectively ground into a step shape, and the step head end is close to the inner diameter of the nitinol tube 2, so that the nitinol tube 2 can be in contact and jogged with the step head end of the opposite sides of the first core wire 11 and the second core wire 12. The outer diameter of the two sections of core wires is the same as the outer diameter of the connecting pipe. The soldering tin filler 5 is added to the opposite side of the nickel-titanium tube 2 to the first core wire 11 and the second core wire 12, and a laser welding mode is adopted, so that the nickel-titanium tube 2 and the first core wire 11 and the second core wire 12 are firmly connected, no obvious gap exists at the joint, and the outer diameter of the soldering tin position is consistent with the outer diameter of the nickel-titanium tube 2 through grinding.
The difference is that the inside of the nickel titanium tube 2 is coated with an adhesive, so that the inside of the nickel titanium tube 2 is adhered and fastened with the first core wire 11 and the second core wire 12, and the connection strength is increased.
The difference is that the first core wire 11, the second core wire 12 and the nickel titanium tube 2 are connected by soldering tin by adding the soldering tin filler 5 at the edges of the tubes.
The difference is that the opposite ends of the first core wire 11 and the second core wire 12 are grinded to be conical, the outer diameter of the straight section is slightly larger than the inner diameter of the nickel-titanium tube 2, and the first core wire 11 and the second core wire 12 are firmly embedded with the 3 respectively before welding by applying a certain embedding force. Thus, the fitting strength other than the welding strength can be provided.
Thereby ensuring that the guide wire is not broken when the medical staff uses the guide wire.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and 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 may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (8)
1. A smooth heterometallic core guidewire, characterized by; the novel plastic composite wire comprises a first core wire (11) and a second core wire (12), wherein a nickel-titanium tube (2) is sleeved on the outer surface of the opposite end of the first core wire (11) and the second core wire (12), and the first core wire (11) and the second core wire (12) are fixed through the nickel-titanium tube (2); a metal coil (3); the circular head (4) for preventing the blood vessel from being damaged is arranged at the other end of the second core wire (12);
the opposite ends of the first core wire (11) and the second core wire (12) are stepped;
the section of the opposite ends of the first core wire (11) and the second core wire (12) is the same as the section of the inner circle of the nickel-titanium tube (2);
the stepped outer surface is embedded with the inner surface of the nickel-titanium tube (2);
the first core wire (11) and one end opposite to the second core wire (12) are ground to be conical, the outer diameters of the straight sections of the first core wire (11) and the second core wire (12) are larger than the inner diameter of the nickel-titanium tube (2), and gaps between the nickel-titanium tube (2) and the conical sections are used for filling soldering tin.
2. A smooth, heterometallic core guidewire as recited in claim 1, wherein: the first core wire (11) is made of stainless steel.
3. A smooth, heterometallic core guidewire as recited in claim 2, wherein: the second core wire (12) is made of nickel-titanium alloy.
4. A smooth, heterometallic core guidewire as recited in claim 1, wherein: the opposite ends of the first core wire (11) and the second core wire (12) are stepped.
5. A smooth, heterometallic core guidewire as recited in claim 1, wherein: the opposite ends of the first core wire (11) and the second core wire (12) are attached.
6. A smooth, heterometallic core guidewire as recited in claim 1, wherein: the section of the excircle of the nickel-titanium tube (2) is the same as the section of the core guide wire (1).
7. A smooth, heterometallic core guidewire as recited in claim 1, wherein: both ends of the nickel-titanium tube (2) are provided with soldering tin fillers (5).
8. A smooth, heterometallic core guidewire as recited in claim 7, wherein: the outer surfaces of the soldering tin fillers (5) are respectively attached to opposite ends of the first core wire (11) and the second core wire (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232088.6A CN115068789B (en) | 2021-10-22 | 2021-10-22 | Smooth heterogeneous metal core guide wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232088.6A CN115068789B (en) | 2021-10-22 | 2021-10-22 | Smooth heterogeneous metal core guide wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115068789A CN115068789A (en) | 2022-09-20 |
| CN115068789B true CN115068789B (en) | 2024-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111232088.6A Active CN115068789B (en) | 2021-10-22 | 2021-10-22 | Smooth heterogeneous metal core guide wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115068789B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004230141A (en) * | 2002-08-08 | 2004-08-19 | Terumo Corp | Guide wire |
| CN101642600A (en) * | 2009-08-28 | 2010-02-10 | 乐普（北京）医疗器械股份有限公司 | Guide wire |
| CN107666936A (en) * | 2015-04-14 | 2018-02-06 | 艾博特心血管系统公司 | For improving the mechanism across the stiffness transition at different-metal material welding junction surface |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6866642B2 (en) * | 2002-11-25 | 2005-03-15 | Advanced Cardiovascular Systems, Inc. | Enhanced method for joining two core wires |
| US9636485B2 (en) * | 2013-01-17 | 2017-05-02 | Abbott Cardiovascular Systems, Inc. | Methods for counteracting rebounding effects during solid state resistance welding of dissimilar materials |
-
2021
- 2021-10-22 CN CN202111232088.6A patent/CN115068789B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004230141A (en) * | 2002-08-08 | 2004-08-19 | Terumo Corp | Guide wire |
| CN101642600A (en) * | 2009-08-28 | 2010-02-10 | 乐普（北京）医疗器械股份有限公司 | Guide wire |
| CN107666936A (en) * | 2015-04-14 | 2018-02-06 | 艾博特心血管系统公司 | For improving the mechanism across the stiffness transition at different-metal material welding junction surface |
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| Publication number | Publication date |
|---|---|
| CN115068789A (en) | 2022-09-20 |
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