Nitinol guide wire is one of the most important products of nitinol wire. In fact, every medical nitinol material is composed of nearly equal atomic percentages of nickel and titanium, complies with GB 24627 and ASTM F2063, and can be used for surgical implants. To meet the needs of various special applications, we also have ternary or multi-component Nitinol materials to choose from. In our company, all raw materials must be inspected by a third party to ensure that the chemical composition, phase transition temperature, material uniformity, and microstructure meet the requirements of relevant standards. All products are processed to the final product using high-precision single-crystal or polycrystalline diamond drawing dies to achieve a uniform and smooth surface quality. Properly heat-treated nitinol wires can withstand strains of up to 8% at body temperature without permanent buckling.
Nitinol guide wire belongs to medical suture products. In fact, it is a functional special suture mainly composed of nickel-titanium memory alloy wire (nickel-titanium alloy) and medical suture needles, which is suitable for human soft tissue sutures. What are the advantages of medical nickel-titanium guide wire? Let's take a look together.
|
|
Name |
Brand |
Lot No. |
Condition |
Size (mm) |
Qty(M) |
NW(kg) |
Standard |
|
------ |
Ti-Ni memory alloy wire |
Innovmet |
20200629 |
annealed |
Dia0. 1mm |
200 |
/ |
ASTMF2063 |
|
Tensile Test |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
reduction of area |
grain size |
Bend Test a>130 |
ak(J/cm²) |
IE Impact strength (mm) |
|
925 |
210 |
21 |
/ |
6 |
Q |
/ |
/ |
|
|
Chemical Composition |
Ti(%) |
Fe(%) |
C(%) |
O(%) |
N(%) |
H(%) |
Co (%) |
Ni(%) |
|
Remainder |
0.008 |
0.044 |
0.026 |
0.00 2 |
0.001 |
/ |
55.76 |
In fact, the nitinol alloy guide wire will automatically restore its shape after certain heat treatment. According to the characteristics of the shape, it can be divided into one-way, two-way, and whole processes. In addition, it will also deform when subjected to external force but will return to its original state after the external force is removed, so it has superelastic deformation. In general, medical NiTi guide wires have very good damping properties due to the self-regulation of the phase transition and the interfaces and motions generated during the phase transition. During deformation, the electrical resistance has a linear relationship with the strain. When a phase transition occurs, the slope of the curve will decrease, but the relationship will remain linear before and after.
After certain heat treatment, the medical nitinol guide wire will automatically restore its shape. This change is the shape memory property of Nitinol shape memory alloy. According to the recovery state, it can be divided into one-way. When subjected to an external force, it will return to its original state when the external force is removed, which is a superelastic property. After the superelastic deformation of the medical nickel-titanium guide wire shape memory alloy, the phase transformation is directly caused, and the reverse martensitic phase transformation occurs after the external force is removed. In fact, when the medical nickel-titanium guide wire is used, it will deform when it is subjected to external force, and it will return to its original state after the external force is removed. This is a superelastic feature of Nitinol shape memory alloys. After superelastic deformation, Nitinol shape memory alloy will directly lead to martensitic transformation and the removal of external force will lead to reverse martensitic transformation. In addition, it also has high mechanical properties and biocompatibility, which makes it widely used in the medical field. Such as orthodontics, plastic surgery, minimally invasive cardiovascular, etc.; thrombus filter is actually a new product of Nitinol shape memory alloy. Nitinol wire is just one of the nitinol shape memory alloy products.
Application Field
Nitinol alloy guide wires are widely used in the medical field, usually for interventional procedures or cardiac catheterization. Specific applications include:
1) Vascular Surgery: Nitinol wires are used in angioplasty procedures (including coronary angioplasty, thrombectomy, and repair of aneurysms, including ruptured aneurysms).
2) Cardiac Catheterization: Nitinol guidewires are used as positioners for implantable pacemakers or heart valve replacement devices.
3) Nerve guide wires: The application of Nitinol guidewires in neurological treatment includes the guidance of nerve stimulators and electrodes.
Nitinol guide wires can also be used in ENT surgery, oral and maxillofacial surgery, ophthalmic surgery, and skin excision.
- Packing with moisture-proof paper.
- Packaging with Carton.
- Packaging with foam plastics in all sides of the carton.
- Packing big quantities of products in wooden cases.
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