Hydrophilic coating for an intracorporeal medical device

(57) It is the device to which covering which is formed by the method for preparing the object for medical treatment, the object for diagnosis, or hydrophile property covering in the device for medical treatments for the summary inside of the body and its method, and has durability was given. In one mode, covering has the topcoat of the base coat which polymerized and the object for medical treatment, the object for diagnosis, or hydrophile property, and base coat has a grafting ingredient adhering to the binding ingredient combined with topcoat, a binding ingredient, and a device. In another mode, the grafting ingredient for which covering polymerized including the hydrophilic compound, the grafting ingredient, and the combination thing of salt has a domain unconstructed a bridge. Covering of the present invention is applicable to the metal device which is not covered or it is covered with the polymer nature surface, for example, a polymer nature catheter, or a polymer nature primer, or a stent.