The main symptoms of OHS are due to lack of sleep and include:
- Excessive daytime sleepiness
- Falling asleep during the day
- Increased risk for accidents or mistakes at work
Symptoms of low blood oxygen level (chronic hypoxia) can also occur, such as shortness of breath or feeling tired after very little effort.
Signs and tests
People with OHS are usually very overweight. Symptoms of OHS include:
- Bluish color in the lips, fingers, toes, or skin (
- Signs of right-side heart failure (
cor pulmonale), such as swollen legs or feet, shortness of breath, or feeling tired after little effort
- Reddish complexion
- A short, thick neck and small airway passage in the mouth
Tests to confirm OHS include:
- Sleep study
- Lung (pulmonary) function
Arterial blood gas
Doctors can tell OHS from obstructive sleep apnea by high carbon dioxide levels in the blood when a person is awake.
Review Date: 08/17/2009
Reviewed By: David A. Kaufman, M.D., Section Chief, Pulmonary, Critical Care & Sleep Medicine, Bridgeport Hospital-Yale New Haven Health System, and Assistant Clinical Professor, Yale University School of Medicine, New Haven, CT. Review provided by VeriMed Healthcare Network.Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.