| 摘要 |
1465624 Non-thrombogenic catheters MEADOX MEDICALS Inc 16 April 1974 [13 April 1973] 16468/74 Heading A5R A non-thrombogenic catheter comprises an outer surface of an acidic copolymer in which the content of acrylic acid is in the range 9.8% to 19.2% by weight and the remainder is copolymerized ethylene, neutralizing sodium or potassium ions being present in said outer surface so that the surface becomes negatively charged on intravascular insertion as the result of release of Na<+> or K<+> ions. The acidic copolymer is neutralised in the range 29% to 71%, preferably 60%, the charge density on the surface being preferably 1 electron per 1000 square A. The catheter may comprise a coating of said copolymer on a tube of another material, which may itself be thrombogenic. |
