0828 Positional Central Sleep Apnea

Abstract Introduction Obstructive sleep apnea (OSA) is well known to often improve with non-supine positioning as opposed supine positioning. The prevalence of OSA that may on proper 50-60% and the appears when disappears 25-30%. Sleeping in a lateral thought reduce pressure airway, shift directional effect gravity airway structures, counteract physiologic genioglossus collapse occurs supine. On other hand, positional changes severity central (CSA) not documented aside from Cheyne-stokes breathing congestive heart failure. Report Cases: We present two cases CSA. One patient 52-year-old male history traumatic brain injury, hypogonadism, hypothyroidism Parkinson’s Disease. He underwent split-polysomnography (PSG) for dream enactment behavior, was found have severe CSA, which occurred almost exclusively (Supine Apnea-Hypopnea Index (AHI) 66/hr, Non-Supine 0.8/hr). A belt recommended patient. second an 89-year-old chronic obstructive pulmonary disease kidney who PSG symptoms apnea. periods breathing. This also AHI 69/hr, 0/hr) improved continuous positive (CPAP) independent position (AHI 6/hr). CPAP or Conclusion Positional CSA unrelated failure uncommon phenomenon poorly understood pathophysiology. Treatment challenging based elucidating addressing underlying cause such optimizing treatment therapy characteristically potential option OSA. However, our findings further support presence phenotype respond therapy. Support (If Any)