CO2 rebreathing

CO₂ rebreathing occurs when exhaled carbon dioxide, which normally leaves the body, is inhaled again instead of being fully expelled. This can happen in certain medical or breathing devices if the system isn't designed properly, allowing some of the exhaled air to stay in the mask or breathing circuit. When CO₂ is re-inhaled repeatedly, it can build up in the bloodstream, leading to symptoms like dizziness, headaches, or increased heart rate. Proper equipment and ventilation are essential to prevent rebreathing, ensuring that breathing remains safe and effective.