Washington Subscriber. Answer: A Savary dilator is the brand name for a dilator that can be passed over a guide wire during EGDs, especially when strictures become too tight (American is another brand name for a similar dilator also used for the same purpose).astroenterology Coding Alert. - Published on Wed, Sep 07, 2005 Question: My gastroenterologist's notes indicate that he performed an upper gastrointestinal endoscopy (EGD), during which he used a guide wire and Savary dilators.