Glossary

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FI02 The fraction of inhaled oxygen expressed as a percent; Room air has an FI02 of 21%
Final Awakening The duration of wakefulness after the final wake-up time until the arise time (lights on)
First-night Effect The effect of the environment and polysomnographic recording apparatus on the quality of the subject's sleep during the first night of recording
Flare-up Commonly known as an asthma attack; When asthma condition is out of control
Flow Trigger Initiation of inspiration when the patient's inspiratory effort exceeds the flow sensitivity setting (threshold)
Fragmentation (of sleep architecture) Connotes repetitive interruptions of sleep by arousals and awakening
Free-running A chronobiological term that refers to a person that has an impaired ability to entrain sleep or is without time cues
Functional Residual Capacity(FRC) The total amount of gas left in the lungs after a resting expiration

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