The CarbonAid ®and the CarbonMini®CO2 diffusers are intended for the insufflation of CO2 into the thoracic cavity during cardiothoracic surgery, to reduce the risk of air embolism. They have been shown to be the most effective devices for de-airing on the market and remain efficient even when wet. By avoiding turbulence, they create close to 100 % CO2 atmosphere within the wound cavity. The continuous overflow of CO2 within the cavity may also prevent small particles from falling into the wound, thus reducing the risk of contamination. The well known bacteriostatic effect of CO2 further contributes to the prevention of infections.