arousal index

a·rou·sal in·dex

(ă-row'zăl in'deks)
A measurement calculated from sleep disruptions observed during a sleep study.
References in periodicals archive ?
Arousal Index - the most sensitive measure of SQ - measures number and frequency of disturbances to the brain waves during the course of the night - showed an average 53% improvement on the 18" seat
CPAP is effective at improving oxygen saturation and reducing scores on the arousal index, which measures the frequency of arousals per hour of sleep using electroencephalography.
His sleep study did not show any "classic" obstructive events, yet he did present with upper airway resistance complete with an arousal index of over 20/hour and with an associated brady-tachy cardiac rhythm.
The arousal index was scored as the number of arousals per hour during study period.
The same applies for other measures of severity of sleep apnoea, such as arousal index or degree of oxygen saturation.
The relative risk of death as a function of each transition index was calculated using proportional hazards models, adjusting for age, gender, body mass index, race, hypertension, cardiovascular disease, smoking status, respiratory disturbance index and arousal index.
Children with chronic daily headache had shorter total sleep time, longer sleep latency, shorter REM sleep, and a higher arousal index.
Sleep architecture as reflected in the arousal index improved from a mean of 20.
The arousal index, desaturation index, and all other variables measured except total sleep time showed improvements with n-CPAP, while atrial overdrive pacing had no measurable effect on the variables, the researchers said.
The arousal index score decreased from 27 to 23 per hour of sleep.
O'Donoghue of the Institute for Breathing and Sleep, Melbourne, and his colleagues determined that in-home polysomnography (PSG) systematically underestimated the apnea-hypopnea index (AHI) and the arousal index (ArI), compared with standard laboratory measures.