The invention provides a system and method for performing less-invasive surgical procedures within a body cavity. In a preferred embodiment, the invention provides a system and method for isolating a surgical site such as an anastomosis between an internal mammary artery and a coronary artery in a...http://www.google.com.au/patents/US5807243?utm_source=gb-gplus-sharePatent US5807243 - Method for isolating a surgical site
