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Medical needle with micronano compound antibacterial texture on surface and preparation method of medical needle

A micro-nano composite and nano-texture technology, applied in medical science, needles, applications, etc., can solve the problems of structural damage of the coating layer, uneven surface coating layer, etc., and achieve small heat-affected zone, complex processing shape, The effect of high machining accuracy

Pending Publication Date: 2019-07-30
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese invention "CN201220447676.2" proposes to form a ferrite or austenitic antibacterial stainless steel coating on the surface of surgical instruments by heat treatment, and realize its antibacterial performance through the antibacterial coating. However, the medical equipment prepared by this method has surface coatings. Inhomogeneous cladding and grinding and polishing will lead to defects such as cladding structure damage

Method used

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  • Medical needle with micronano compound antibacterial texture on surface and preparation method of medical needle
  • Medical needle with micronano compound antibacterial texture on surface and preparation method of medical needle

Examples

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Effect test

example 1

[0019] A medical needle with micro-nano composite texture on the surface, the specification is 16G (outer diameter 1.6mm), and the base material is 316L stainless steel. The specific preparation method is as follows:

[0020] (1) A stainless steel medical needle with a diameter of 1.6 mm is clamped on a precision rotary table, and an optical camera is used to focus and align the laser on the processed surface of the medical needle. The wavelength of the laser is 532nm, the pulse width is 10ps, and the spot diameter is 16μm.

[0021] (2) A laser processing platform is used to process periodic nano-textures on the surface of stainless steel needles. The processing parameters are: laser frequency 50kHz, laser energy 0.35μJ, scanning speed 40mm / s, processing direction is axial, each medical needle is rotated 0.6°, repeated scanning times is 1 time, the processed nano-texture period 450nm.

[0022] (3) Use a laser platform to process the micron boss texture, the laser frequency ...

example 2

[0025] A medical needle with a micro-nano composite texture on the surface, the specification is 27G (outer diameter 0.4mm), and the base material is 304 stainless steel. The specific preparation method is as follows:

[0026] A medical needle with a micro-nano composite texture on the surface, the specification is 27G (outer diameter 0.4mm), and the base material is 316L stainless steel. The specific preparation method is as follows:

[0027] (1) A stainless steel medical needle with a diameter of 0.4mm is clamped on a precision rotary table, and an optical camera is used to focus and align the laser on the processed surface of the medical needle. The wavelength of the laser is 532nm, the pulse width is 10ps, and the spot diameter is 16μm.

[0028] (2) Use a laser processing platform to process periodic nanotextures. The processing parameters are: laser frequency 35kHz, laser energy 0.24μJ, scanning speed 20mm / s, processing direction is axial, each medical needle is rotate...

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Abstract

The invention belongs to the field of medical instrument laser processing, and particularly relates to a medical needle with a micronano compound antibacterial texture on the surface. The medical needle with the micronano compound antibacterial texture on the surface has the advantages that a picosure processing technology is adopted, a nanometer texture with the periodicity and a micronano compound texture with a boss-shaped micrometer texture are processed on the surface of the medical needle, by improving the hydrophobicity of the surface of the medical needle and increasing the contact area between bacteria and the metal surface, the bacterial adhesion is inhibited, and the bacteria are killed to achieve the antibacterial effect of the texture. The medical needle with the micronano compound antibacterial texture on the surface can be applied to puncture biopsy, radiotherapy, subcutaneous injection, blood sampling and other minimally invasive surgeries to reduce the risk of bacterial infection in patients.

Description

technical field [0001] The invention relates to the field of laser processing of medical instruments, in particular to a medical needle with a micro-nano composite antibacterial texture on the surface and a preparation method thereof. Background technique [0002] Modern medical surgery uses medical equipment to directly perform safety testing and surgery on patients, effectively solving many diseases, but because medical equipment directly contacts the internal organs or soft tissues of the human body, if the hygiene of medical equipment is not strictly controlled, it may cause patients Bacterial infection brings great economic loss and mental torture to patients. Among them, medical needles are widely used in minimally invasive surgical operations such as subcutaneous injection, puncture biopsy, radiotherapy, puncture biopsy, etc., and are in direct contact with the patient's organs or soft tissues. Therefore, it is of great significance to improve the antibacterial prope...

Claims

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Application Information

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IPC IPC(8): A61M5/32A61B10/02A61N5/00A61B17/34
CPCA61M5/32A61B10/0233A61N5/00A61B17/34B23K26/352A61M2207/00B23K26/355
Inventor 王兴盛马晨斌李成玉康敏
Owner NANJING AGRICULTURAL UNIVERSITY
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