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Hypopnea were defined as more than 30% fall in signal excursion with associated more than 4% desaturation from pre-event baseline for 10 seconds or more.
greater than or equal to] 15 episodes of apnea or hypopnea, or both, per hour of sleep, regardless of accompanying symptoms.
We look at our "airflow" channel and interpret these changes as central apneas and hypopneas.
Compared with a quiet sleeper, the so-called simple snorer experiences upper-airway resistance and a reduced airflow but gets more air than a person experiencing sleep apnea or hypopnea does.
Apnoea-Hypopnea Index (AHI): The ratio obtained by dividing the total duration of apnoea and hypopnea observed during sleep by the total duration of sleep.
Obstructive sleep apnea hypopnea syndrome as a reason for active management of pulmonary embolism.
Sometimes the increased breathing ("recovery breaths") overshoots and lowers the C02 too much so a central apnea or hypopnea occurs.
Outcome was measured as change in the obstructive apnea/hypopnea index (OAHI), defined as the number of instances of apnea and hypopnea per hour of total sleep time.
Patients were defined as having moderate to severe OSA if they had more than 20 apneas and hypopneas per hour of sleep (their apnea-hypopnea index was greater than 20).