CRH O'Regan System | 98 followers on LinkedIn. CRH Medical Corporation is affecting a paradigm shift in the treatment of hemorrhoids by gastroenterologists utilizing our proprietary CRH O’Regan System®. Our System offers safe and effective in-office or ASC treatment of all grades of hemorrhoids. CRH provides medical training along with comprehensive professional, operational and marketing support directly to its partner physicians, leading to adoption of the technology and techniques by prominent gastroenterology groups nationwide.