http://health.usnews.com/health-news/news/articles/2014/01/08/chest-implant-might-help-with-hard-to-treat-sleep-apneaIf this is what you are referring to, it sounds like it is something for treating central sleep apnea, which originates with the nervous system. Like a pacemaker triggers the heart to beat, this apparently triggers breathing.
I note, too, that it has reduced apneas and hypopneas by 68%. Unless your apnea is very mild, it seems to me that a 68% reduction is not terribly effective. With CPAP, I get a 90% or better reduction. If your AHI is above 5, you are still experiencing sleep apnea.
Wayne