hospital. They sent the report back to the ENT who wrote the prescription for the Medical Device company to order the BPAP. In the diagnostic phase they wrote that I only had 10 obstructive events but well over 100 central events. Supposedly the BPAP is better for central type apnea...not that I understand the difference. I also am a mouth breather with major dry mouth issues, so supposedly BPAP is better for that as well.