Title: 0456 False Negative Home Sleep Apnea Testing- An Important Concept To Prevent Misdiagnosis In Patients With Underlying Sleep Apnea
Abstract: The current gold standard for a definitive diagnosis of OSA is an overnight Polysomnography (PSG). One of the limitations of the study is the lack of Electroencephalographic (EEG) data. This prevents the inclusion of RERAs in the diagnosis of Sleep Apnea. The results of this preliminary analysis serves as the foundation to elucidate whether subtle changes in breathing patterns recorded during a sleep study are reflected in changes in cortical activity. Methods: Ø Patients in this study were those that underwent HSAT from February of 2017 till September of 2018. The studies read by a single Sleep expert were selected for this study. Only those patients whose REI in their HSAT less than 5 were included in this study. All these patients had multiple airflow fluctuations in their HSAT that raised the suspicion for the presence of RERAs.Those patients with REI of less than 5 and did not have airflow fluctuations were excluded from the study.Of the 111 patients selected, only 43 patients underwent subsequent Polysomnogram at the time of the study.Of the 43 patients, 29 of them were eventually diagnosed with sleep apnea while 14 patients did not end up with the diagnosis of sleep apnea. Patients who underwent HSAT from February of 2017 till September of 2018 were chosen. Only those patients whose Respiratory Event Index less than 5 were included in the study. A total of 111 patients met the inclusion criteriaA total of 43 patients underwent a subsequent overnight polysomnogram in the sleep center. 68 patients did not have subsequent PSG in the sleep center. 5 of them underwent a repeat HSAT 29 patients were positive with RDI greater than 5 and 14 patients were negative with RDI less than 5 .This study highlights the importance of analyzing the airflow and thoraco-abdominal waveforms during the HSAT interpretation to predict the possibility of underlying sleep related breathing disorder. n/a