METHOD FOR COATING INNER SURFACE OF MEDICAL TUBE MADE FROM VINYL CHLORIDE WITH ANT-THROMBOTIC MATERIAL

摘要

Disclosed is a method for coating the inner surface of a medical tube made from poly(vinyl chloride) and containing a plasticizer with an anti-thrombotic material comprising a specific (meth)acrylate copolymer, whereby the anti-thrombotic material can be coated uniformly, in a satisfactory amount, and with high efficiency in a simple manner without undergoing the deterioration in appearance caused by the elution of the plasticizer or the unevenness in coating. The anti-thrombotic material is dissolved in a solvent to produce a solution, wherein the solvent comprises water and at least one alcohol and is so prepared that a copolymer constituting the anti-thrombotic material can be dissolved therein but the plasticizer cannot be dissolved therein. The solution is allowed to pass through the inside of the tube, and water is then allowed to pass through the inside of the tube. Subsequently, the tube is dried.