A noninvasive technique for detecting obstructive and central sleep apnea

摘要: A new noninvasive method to detect obstructive and central sleep apnea [(OSA) (CSA)] events is described. Data were collected from ten volunteer subjects with a previous diagnosis of OSA while they titrated for continuous positive airway pressure (CPAP) therapy. Apneic identify by analyzing estimated impedance determined airflow signals delivered CPAP. To enhance performance this technique, single-frequency (5 Hz 0.5 cmH/sub 2/O peak-to-peak amplitude) probing signal was superimposed on the applied CPAP pressure. The results indicated that during (mean: 17.9, SD: 3.4, N=50) significantly higher then CSA 4.1, 1.7, N=50). When compared fixed threshold, 100% all can be correctly categorized. These indicate it may possible diagnose noninvasively based upon technique. instrument algorithm required are relatively simple incorporated in home-based device. If used prescreening patients, could reduce cost, waiting time, discomfort associated traditional diagnostic procedures.