How is the condition diagnosed? Diagnosis of sleep apnea begins
with a medical history and physical exam. A sleep study, called
a polysomnogram, may be recommended. This test measures the
following body functions during sleep: airflow and respiratory
effort blood oxygen levels blood pressure and heart rate
electrical activity in the brain A multiple sleep latency test
measures the speed of falling asleep. An arterial blood gas test
may also be performed to check levels of carbon dioxide and
oxygen. An electroencephalogram, or EEG, may be done to measure
the electrical activity of the brain. A cranial CT scan may also
be done to look for any deformities, tumors, or masses in the
brain.