Surface treatment method for material nickel-titanium alloy for left aurcle plugging device

A technology of a nickel-titanium alloy and a plugging device, which is applied in the field of biomedical metal surface treatment, can solve problems such as inability to achieve effects, and achieve the effects of improving the quality of surface treatment, improving biocompatibility, and expanding the scope of process treatment.

Inactive Publication Date: 2017-06-09
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, only heat treatment and chemical passivation cannot achieve the desired effect.

Method used

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  • Surface treatment method for material nickel-titanium alloy for left aurcle plugging device
  • Surface treatment method for material nickel-titanium alloy for left aurcle plugging device
  • Surface treatment method for material nickel-titanium alloy for left aurcle plugging device

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Embodiment

[0028] figure 1 It is a process flow chart of a method for surface treatment of a nickel-titanium alloy material for a left atrial appendage occlusion device disclosed by the present invention; figure 1 As shown, the nickel-titanium alloy (nickel-titanium shape memory alloy) was put into the mixed solution of hydrofluoric acid: nitric acid: water concentration ratio of 1:4:5 for pickling for 5 seconds, cleaned and dried, and then the nickel-titanium alloy Put it into the special polishing solution for nickel-titanium alloy (anhydrous sulfuric acid methanol system polishing solution, wherein the volume ratio of sulfuric acid is 50%, and the rest is methanol) for electrochemical polishing. The electrolyte temperature is -20°C, the treatment time is 1min, and the voltage 20V, current 5A, cleaning and drying. Next, the nickel-titanium alloy was fixed on the mold tooling of the left atrial appendage occluder, and heat-treated in a salt bath furnace for 10 minutes at a treatment te...

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Abstract

The invention discloses a method for surface treatment of a nickel-titanium alloy, a material used for a left atrial appendage occlusion device, and belongs to the technical field of medical metal surface treatment; the invention relates to a method for surface treatment of a biomedical nickel-titanium alloy, comprising the following steps and process conditions: (1) Substrate pretreatment; (2) Electrochemical polishing; (3) Product heat treatment setting; (4) Surface passivation process. Compared with the prior art, the process can significantly improve the surface treatment quality, improve the corrosion resistance of the nickel-titanium plug, and can expand the scope of the process treatment, especially suitable for the surface treatment of small pieces and complex-structured nickel-titanium products, with low cost and low cost. Simple and convenient for factory production and use of nickel-titanium products.

Description

technical field [0001] The invention specifically relates to a surface treatment method of a nickel-titanium alloy material for a left atrial appendage occlusion device, and belongs to the technical field of biomedical metal surface treatment. Background technique [0002] Atrial fibrillation (AF) is one of the most common heart rhythm disorders. The left atrial appendage is the most common site of thrombus formation in patients with atrial fibrillation, accounting for about 90% of thrombus formation. The prevention of stroke by physical means of closure of the left atrial appendage can be used in patients with atrial fibrillation who have contraindications to anticoagulation, which is a current research hotspot. The closure of the left atrial appendage by interventional closure means less trauma, easy to accept by patients, and has been proven safe and feasible. At present, there are many devices for occluding the left atrial appendage that have been used clinically, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C23G1/10C25F3/22C21D1/46C23C22/34C22C19/03A61L31/02
CPCC23F17/00A61L31/022A61L2400/18C21D1/46C22C19/007C22C19/03C23C22/34C23G1/10C25F3/22
Inventor 林建国高晓成正辉邱宇晨曹镇财张德闯
Owner XIANGTAN UNIV
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