How dangerous is Obstructive Sleep Apnea (OSA)? OSA has been linked to high blood pressure, heart disease, and diabetes among other health risks. OSA is the term for when your airway cannot remain open continuously during sleep. When your body cannot breathe in oxygen, it jolts your body awake but does not fully awaken you. This can occur many times throughout the night and puts extreme stress on your body to maintain a constant oxygen level. This stress includes the high blood pressure, heart disease, and diabetes as examples. If you have mild to moderate OSA, an oral appliance may be the best decision for you to take control of this harmful condition. Dr. Keri Do has treated many patients who suffer from this condition and can decide which treatment will work best for you.