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Parameter
Description
Pressure
Average inspiratory pressure during the selected period (95
th
percentile for each day;
average of 95
th
percentile values for periods >1 day).
Exp. Pressure
Average expiratory pressure during the selected period (95
th
percentile for each day;
average of 95
th
percentile values for periods >1 day).
Leak
Average of the 95
th
percentile values of leak during the selected period for days with
usage only.
Vt
Average of the 50th percentile values of tidal volume during the selected period for
days with usage only.
RR
Frequency of breathing, expressed as the number of breaths per minute (5-breath
moving average).
MV
Average of the 50th percentile values of minute ventilation during the selected period
for days with usage only.
Ti
Duration of inspiration (ie, the respiratory flow into the lungs), expressed in seconds (5-
breath moving average).
I:E
I:E is the ratio of the inspiratory period to the expiratory period.
Spont Trig
Percentage of breaths that are spontaneously triggered, measured from the last 20
breaths.
Spont Cyc
Percentage of breaths that are spontaneously cycled, measured from the last 20
breaths.
AHI
Apnea-Hypopnea Index—average AHI during the selected period. AHI and AI are
calculated for times of low leak only.
Total AI
Apnea Index—average total AI during the selected period.
