Devices for a good night's sleep

For one thing, many people don't necessarily know they have it because the symptoms are seemingly harmless: snoring, daytime drowsiness. In 2006, only 17.4 percent of patients with moderate to severe cases of OSA received treatment, according to Canaccord Adams Investment Research. The group estimates the global sales of sleep-therapy devices will hit $3 billion in 2010 compared with $1.5 billion in 2006.

However, one medical expert says that the neurostimulation technology still needs additional testing and that some existing therapies are cheaper and probably more effective.

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