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Preparation method of surface hard protective film for guide wire/tunnel needle used in peritoneal dialysis catheter insertion

A technology of peritoneal dialysis and protective film, which is applied in the field of film preparation to achieve the effects of not falling off easily, improving high temperature resistance and high pressure sterilization, and strong binding force

Inactive Publication Date: 2011-11-02
沈阳市红十字会医院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of titanium nitride thin films for the protection and modification of medical guide wires and tunnel needles has not been reported at home and abroad.

Method used

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  • Preparation method of surface hard protective film for guide wire/tunnel needle used in peritoneal dialysis catheter insertion
  • Preparation method of surface hard protective film for guide wire/tunnel needle used in peritoneal dialysis catheter insertion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Depositing a Ti+TiN multilayer film on the surface of the guide wire using a magnetron sputtering device

[0026] A planar fixed target magnetron sputtering system is used. The vacuum chamber of the system is a flat cylindrical shape, and the bottom surface of the cylinder is the vacuum chamber door. The target material is pure titanium (99.99%), followed by a permanent magnet and a water cooling system, placed on the side wall (cylindrical surface) of the vacuum chamber. A copper wire with a diameter of 1.2mm and a length of 50cm was selected, cleaned by dilute phosphoric acid, ultrasonically cleaned by anhydrous ethanol, dried, and then suspended in the vacuum chamber of the magnetron sputtering device facing the rectangular Ti target. The vacuum chamber is evacuated to 2×10 -3 After Pa, argon gas was introduced and the gas pressure in the vacuum chamber was maintained at 2.0 Pa. The negative pole of the power supply is connected to the target, the posit...

Embodiment 2

[0029] Example 2: Using an arc ion plating device to deposit a Ti+TiN gradient film on the surface of the guide wire

[0030] The domestic MIP-8-800 arc ion plating device is adopted. A titanium wire with a diameter of 1.5 mm and a length of 45 cm was selected, cleaned with dilute phosphoric acid, ultrasonically cleaned with anhydrous ethanol, dried, and then suspended in the vacuum chamber of the arc ion plating device facing the Ti target. In the device, three Ti targets are arranged up and down facing the titanium wire. Turn on the sample heating system and set the temperature to 300 °C. Evacuate the vacuum chamber to 3 x 10 -3 After Pa, argon gas was introduced and the gas pressure in the vacuum chamber was maintained at 2.0 Pa. Start the hanger and make the Ti wire rotate. Apply a negative bias voltage -800V (adjust the duty cycle to 5%) between the target and the metal Ti wire, and perform glow cleaning on the Ti wire for 3 minutes; after that, adjust the flow of arg...

Embodiment 3

[0033] Example 3: Depositing a TiN film on the surface of the tunnel needle using an arc ion plating device

[0034] The domestic MIP-8-800 arc ion plating device is adopted. Choose a 316L stainless steel tunnel needle with a diameter of Φ10×100mm, wash it with dilute phosphoric acid, ultrasonically clean it with absolute ethanol, and dry it, and then hang it facing the Ti target in the vacuum chamber of the arc ion plating device. Select two Ti targets arranged up and down in the device to work. The vacuum chamber is evacuated to 3×10 -3 After Pa, argon gas was introduced and the gas pressure in the vacuum chamber was maintained at 2.0 Pa. Start the turntable to make the suspended tunnel needle rotate by itself. A negative bias of -800V was applied between the stainless steel tunnel needle and the target (the duty ratio was adjusted to 5%), and the workpiece was glow-cleaned for 3 minutes; after that, the flow of argon gas was adjusted to adjust the gas pressure of the vac...

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Abstract

The invention relates to the field of film preparation, in particular to a preparation method of a surface hard protective film for a guide wire / tunnel needle used in peritoneal dialysis catheter insertion. In the method, by utilizing a magnetron sputtering or arc ion plating deposition device, high-purity Ti is selected as a target material and high-purity Ar and N<2> are taken as working gas, and a TiN or TiN+Ti single layer protective film and a TiN+Ti multilayer protective film are deposited on the surface of the guide wire / tunnel needle used in the peritoneal dialysis catheter insertion so as to improve wear resistance, resistance to high-temperature and high-pressure sterilization, resistance to corrosion caused by disinfectant, bacterial resistance and biocompatibility of the guidewire / tunnel needle. By utilizing the preparation method, problems of the guide wire / tunnel needle used in the peritoneal dialysis catheter insertion such as local surface fall-off and patient infection and toxication resulting from high-temperature and high-pressure sterilization and soakage in disinfectant for a plurality of times are effectively solved.

Description

technical field [0001] The invention relates to the field of film preparation, in particular to a method for preparing a hard protective film on the surface of a guide wire / tunnel needle for peritoneal dialysis catheterization. Background technique [0002] Peritoneal dialysis has become the treatment of choice for uremia patients in my country. The placement of the dialysis catheter during peritoneal dialysis catheterization is the first and crucial step in the success of peritoneal dialysis. Successful dialysis catheter placement can reduce the incidence of peritoneal dialysis catheter-related complications. At present, the guide wire and tunnel needle used in peritoneal dialysis catheterization have problems such as shedding due to repeated high-temperature and high-pressure disinfection and immersion in disinfectant solution. If the shedding enters the abdominal cavity, it will lead to infection and poisoning of the surgical patient. Therefore, medical workers who are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/32C23C14/06C23C14/16C23C14/54
Inventor 金弢熊焰肖正杜昊宋贵宏杨晓光刘焱
Owner 沈阳市红十字会医院
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