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6.10 Ventilation Parameters Monitoring
WARNING
As required by the relevant rules and regulations, oxygen concentration should be
monitored when the equipment is used on the patient. If your ventilator is not
configured with such monitoring function or this function is turned off, use a
monitor which complies with the relevant international rules and regulations for
oxygen concentration monitoring.
NOTE
All the parameter values are calculated based on the real-time flow and pressure
waveforms data. For real-time flow and pressure data, five-point moving average
filter (FIR low pass filter) is adopted at original sampling rate of 250 Hz with about
24 Hz of cutoff frequency (3 db) and 10 ms of delay.
The conditions to which the tidal volume and minute volume the ventilator displays
correspond are temperature, ambient pressure, and saturated water vapor status.
Setting
parameter
Description
TV The gas volume the patient inspires or expires each time during resting breathing.
O2% The volume percentage of oxygen in the mixed gas delivered to the patient.
Flow The gas delivered flow that the ventilator will use during the inspiratory phase.
I:E The ratio between the inspiratory and expiratory time.
PEEP Positive end-expiratory pressure.
Phigh Available only in DuoLevel and APRV modes. Phigh is the high pressure level at
which the patient can spontaneously breathe and is an absolute value.
Pinsp Inspiratory pressure in pressure control mode. It is an absolute value.
ΔPapnea Available only in CPAP/PSV, DuoLevel and APRV modes. ΔPapnea is
inspiratory pressure in apnea ventilation mode and is relative to PEEP or Plow.
Plimit The pressure limit level at which the airway pressure is held during the inspiratory
phase until the start of expiratory phase.
Plow Available only in DuoLevel and APRV modes. Plow is the low pressure level at
which the patient can breathe spontaneously.
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