| 摘要 |
PURPOSE:To easily insert a catheter into a body and to prevent an invasion of pathogen immediately after inserting it by forming a layer of a hygroscopic polymer on a surface of catheter part which is left in the living body. CONSTITUTION:A layer of a hygroscopic polymer is formed on a surface of a catheter part which is left in a body and situated below subcutaneous tissue. It is possible to prevent a pathogen from invading along the surface of catheter perfectly by using this method, because the hygroscopic polymer absorbs body fluid, swells up and gets rid of clearances between the catheter and living body tissue perfectly. As examples of hygroscopic polymers, starch - acrylic acid graft polymer, polyacrylic acid, vinyl acetate - acrylic acid copolymer, polyvinyl alcohol-maleic anhydride copolymer, polyethylene oxide, carboxymethyl cellulose, polyvinyl alcohol, carboxymethyl rayon, chitin, chitosan, etc., are mentioned. |
