The present invention is referred to a coronary artery retraction means for retracting tissue and/or fat from the coronary artery during coronary anastomosis and a CO2 supplying device capable of blowing CO2 on the coronary artery during a bypass procedure while the retracting means holds and keeps the fat away from the artery. This device comprises, in one embodiment, a stainless steel ‘V’-shaped wire, including a couple of elastic arms, which end with a hook-like retracting means, and also including on said arms grabbing means allowing the surgeon to place the device in place in an easy and fast maneuver, and a CO2 supplying means on each arm, including at least one gas intake on one end and a gas outlet over said retracting means. In a second embodiment, all the different parts of the device define an integral piece made of plastic material which is fully disposable after the procedure.