Summary: Respiratory failure happens when not enough oxygen passes from your lungs into your blood. Your body's organs, such as your heart and brain, need oxygen-rich blood to work well. Respiratory failure also can happen if your lungs can't remove carbon dioxide (a waste gas) from your blood. Too much carbon dioxide in your blood can harm your body's organs. More >> Less >>

Reference Material:
https://medlineplus.gov/respiratoryfailure.html