The main symptoms of OHS are due to lack of sleep and include:
Symptoms of low blood oxygen level (chronic hypoxia) can also occur, such as shortness of breath or feeling tired after very little effort.
People with OHS are usually very overweight. A physical exam may reveal:
Tests used to help diagnose and confirm OHS include:
Doctors can tell OHS from obstructive sleep apnea because patients with OHS have high carbon dioxide levels in the blood when awake.
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Tzelepis GE, McCool FD. The lungs and chest wall diseases. In: Mason RJ, Broaddus VC, Martin TR, et al, eds. Murray and Nadel’s Textbook of Respiratory Medicine. 5th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 88.
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