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MORPHEUS
Inspiratory pause
Expiratory time
Inspiratory peak flow
Expiratory peak flow
It indicates the duration of the patient's
inspiratory pause: the measurement unit is
seconds.
This measurement represents the
inspiratory time during which the ventilator
maintains a constant airways pressure.
Example: setting RATE=15, I:E=1:1,
Ppause=50% gives an inspiratory pause
time of 1 second.
It indicates the duration of the patient's
expiratory time: the measurement unit is
seconds.
This parameter defines expiratory time
duration. The value depends on the
breathing rate parameters and the I:E ratio.
Example: setting RATE = 15 and I:E=1:1
gives an expiratory time of 2 seconds.
The flow sensors on the inspiratory line
can also measure the maximum value of
the inspiratory flow (measured in l/min) and
display it on the screen.
There are no alarm limits for this value but
it can be used to obtain information on
ventilation status.
The flow sensor on the expiratory line can
also measure the expiratory peak flow.
When the expiratory valve opens at the
start of expiration, there is a peak in the
flow which depends on lung resistance and
compliance.
Like the previous measurement, this is not
linked to particular alarm thresholds but
provides information on ventilation status.
5-45
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