Eligibility Pre-Screening

Coherex-PFO-Sleep Hypoxia: A multi-center study to determine the response to closure of patent foramen ovale (PFO) with the Coherex FlatStentTM EF PFO Closure System (EF is part of the trade mark name and stands for Enhanced Foam) in patients diagnosed with PFO and significant oxygen desaturation in obstructive sleep apnea (OSA)