Glossary

Definitions

Airway Pressure the pressure in the patient circuit, measured at the distal end of the exhalation filter.

Baseline as in baseline pressure. The pressure at end exhalation.

Baud serial transmission speed usually bits/second.

Bias flow a continuous flow of gas used during expiratory phase when flow triggering is active.

Bit binary digit.

Compliance a measure of stiffness for containers that hold gas (i.e. lungs, patient tubing). The volume required to increase the pressure in the container by a unit of pressure (i.e., L/cmH2O (hPa)).

Continuous positive airway pressure (CPAP) a mode of ventilator operation that allows the patient to breath spontaneously from a continuous-flow or demand valve at an elevated airway pressure. (same as CAP)

E-CycleThe E-Cycle setting on the ventilator determines when the ventilator will transition from inspiration to expiration in PSV and NPPV modes. E-Cycle defines the percent of peak inspiratory flow that end inspiratory flow needs to drop to in order for inspiration to end.

End Expiratory Pressure (End Exp) the airway pressure measured at the end of exhalation. The display is updated at the end of each exhalation.

Expiratory phase (exhalation) the part of the ventilatory cycle from the beginning of expiratory flow to the beginning of inspiratory flow.

Flow Trigger initiation of inspiration when the patients inspiratory effort exceeds the flow sensitivity setting (threshold).

Indicator a light, usually light emitting diode (LED).

Inspiration:Exhalation Ratio (I:E ratio) a standard I:E ratio. It is displayed as XX:1 when exhalation period is larger than the inhalation period. It is displayed as 1:XX when inhalation period is larger than the exhalation period.

Inspiratory phase (inspiration) the part of the ventilatory cycle from the beginning of inspiratory flow to the beginning of expiratory flow. Any inspiratory pause (plateau) is included in the inspiratory phase.

Inspiratory time inspiratory time (expressed in seconds) is the duration of inspiration during mechanical ventilation. As inspiratory time increases, mean airway pressure increases and the I:E ratio becomes lower.

Glossary-4

Respironics V200 Ventilator Operator’s Manual

REF 1057983 A

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Philips V200 manual Definitions, Glossary-4
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