Symptoms are usually worse during sleep, and periods of
Bluish coloration of the skincaused by lack of oxygen
- Daytime drowsiness
- Swelling of the ankles
- Waking up from sleep unrested
- Waking up many times at night
Persons with this disease are extremely sensitive to even small doses of sedatives or narcotics, which can make their already inadequate breathing much worse.
Signs and tests
The health care provider will perform a physical exam. Tests will be done to rule out other causes. For example, muscular dystrophy can make the rib muscles weak, and emphysema damages the lung tissue itself. A small stroke can affect the breathing center in the brain.
Tests that may be done include:
- Blood gases
- Hematocrit and hemoglobin blood tests
Lung function tests
- Overnight oxygen level measurements (oximetry)
- Serum bicarbonate
- Sleep study (