Acrylic acid or acrylic acid anhydride are used for hydrophilizing surfaces of a body, the use comprising pre-coating by PECVD the surfaces using a high frequency plasma, wherein the pre-coating by PECVD takes less than 10 minutes； and then follow-up coating the pre-coated surfaces of the body, wherein the high frequency plasma used for pre-coating is generated from a gas mixture composed of an inert gas and a first gas formed of biocompatible, polymerizable, carboxy group-containing monomers, wherein the follow-up coating is made by CVD using a second gas substantially consisting of the acrylic acid or acrylic acid anhydride monomers, and wherein there is no preceding plasma-activation step in the absence of the first gas or with less than 10 % of the gas formed of the monomers.使用丙烯酸或丙烯酸酐親水化一本體之複數表面，此使用包含：藉由PECVD利用高頻電漿預塗佈該些表面，其中藉由PECVD的此預塗佈步驟進行少於10 分鐘的時間；接著後續塗佈該本體之已預塗佈的該複數表面，其中用以預塗佈之該高頻電漿係由一惰性氣體與一第一氣體所構成的一氣體混合物所產生，該第一氣體係由具有生物相容性、可聚合、含羧基團的單體所形成，其中該後續塗佈步驟係藉由CVD利用實質上由丙烯酸或丙烯酸酐單體所構成的第二氣體進行，其中並不存在先前的電漿活化步驟，在此電漿活化步驟中不存在該第一氣體或具有少於10%之由該單體所形成之該氣體。
