Porous acupuncture needle and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-10245211-B2
Application number	US-201415120633-A
Country	US
Kind code	B2
Filing date	Jul 17, 2014
Priority date	Feb 26, 2014
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

The present invention relates to a porous acupuncture needle and a method for manufacturing the same and, more specifically, to a porous acupuncture needle, which has micro-sized or nano-sized holes formed on the surface thereof to maximize the specific surface thereof, and a method for manufacturing the same.

First claim

The invention claimed is:

1. A porous acupuncture needle having an interior and a surface both comprising iron (Fe) at 45% to 46%, chromium (Cr) at 17% to 19%, carbon (C) at 30% to 34%, nickel (Ni) at 2% to 3%, and aluminum (Al) at 1.5% to 2%, when measure by an energy dispersive spectrometer (EDS), wherein no layer is formed between the surface and the interior, wherein the surface forms 5 to 20 holes per 100 μm 2 of the surface area, and wherein the surface area of the porous acupuncture needle is 0.0150 to 0.0350 m2/g as calculated by measuring methylene blue solution staining of the surface.

2. The porous acupuncture needle of claim 1 , wherein each hole has an average diameter in a range of 0.05 to 3 μm.

3. The porous acupuncture needle of claim 1 , wherein each hole has an average depth in a range of 1 to 3 μm.

4. The porous acupuncture needle of claim 1 , wherein each hole is loaded with a drug.

5. A method of preparing a porous acupuncture needle having an interior and a surface, the method comprising forming a porous structure on the needle surface by performing an anodizing process in an electrolyte containing the needle and a carbon electrode,
the needle is used as a positive electrode and the carbon electrode is used as a negative electrode, and
the anodizing process is performed by applying a direct current voltage of 20 to 38V for 30 minutes to 2 hours,
wherein the surface and interior both comprise iron (Fe) at 45% to 46%, chromium (Cr) at 17% to 19%, carbon (C) at 30% to 34%, nickel (Ni) at 2% to 3%, and aluminum (Al) at 1.5% to 2%, when measure by an energy dispersive spectrometer (EDS), wherein no layer is formed between the surface and the interior, and wherein the surface forms 5 to 20 holes per 100 μm 2 of the surface area.

6. The method of claim 5 , wherein the electrolyte includes one or more selected from an ethylene glycol aqueous solution and a glycerol aqueous solution.

7. The method of claim 5 , wherein the electrolyte is an ethylene glycol aqueous solution including ammonium fluoride at 0.1 to 0.5 parts by weight and water at 1 to 5 parts by weight.

Assignees

• Daegu Gyeongbuk Inst Science & Tech

Inventors

• In Su Il
• Kim Hye Rim
• Razzq Abdul

Classifications

• A61H39/086 Primary

  Acupuncture needles · CPC title

• A61M5/158

  Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} · CPC title

• C25D11/34

  of metals or alloys not provided for in groups C25D11/04 - C25D11/32 · CPC title

• C25D11/005

  Apparatus specially adapted for electrolytic conversion coating (apparatus in general for electrolytic coating C25D17/00) · CPC title

• A61H2201/105

  with means for delivering media, e.g. drugs or cosmetics · CPC title