Nighttime Breathing Monitoring your breathing during sleep is important. While you sleep, your body breathes oxygen in and carbon dioxide out. If your body is not getting enough oxygen, or has too much carbon dioxide, you won’t feel your best while you are awake. Pulmonary Awareness Series 6 years ago You may also like 1:50 What to Expect at Your Pulmonary Visit 6 years ago Pulmonary Awareness Series 2:39 Cough 6 years ago Pulmonary Awareness Series 2:46 Assisted Cough 6 years ago Pulmonary Awareness Series 3:00 C-PAP/BIPAP 6 years ago Pulmonary Awareness Series