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Term
Plateau time
Positive end-expiratory pressure
(PEEP)
Pressure limitation (PLV)
Pressure support ASB
Pressure-controlled ventilation
Resistance (R)
Respiratory minute volume (MV)
EN
Glossary
154
Time during inspiration when the gas flow to the patient is zero.
The plateau time can be set in volume-controlled ventilation modes
and is 0% - 50% of the inspiration time T
Positive pressure (in relation to the atmosphere) in the lungs which
is created artificially during ventilation and is present at the end of
exhalation.
The pressure limitation is set indirectly via pMax. If the ventilation
pressure reaches the set value pMax, it is limited to this set pressure
limit. This means the desired volume cannot be applied. Pressure
limitation is a limit which protects the patient.
p
Pressure
PEEP
Flow
max 4s
Flow
=100%
max
50%
5%
0%
Pressure support ASB applies extra volume which supports
inspiration. Pressure support is triggered by the patient. The
amount of pressure support depends on the Δ pASB parameter and
the expiratory trigger.
Pressure-controlled ventilation determines the pressure which is
administered to the patient's lungs (inspiratory pressure pInsp as
the control variable). The breath volume is determined by the
compliance of the lungs and the applied pressure. The maximum
pressure in the lungs remains constant, whereas the volume varies.
Example: PCV ventilation mode.
Measurement for the airway resistance (flow resistance of the
respiratory gas) which must be overcome during inspiration and
expiration.
Unit: mbar/(l/s)
Volume applied per minute (depends on ventilation mode). The
respiratory minute volume is the product of the respiratory rate f
and the tidal volume Vt:
MV = f x Vt
Explanation
.
i
p
y
gg
ΔpASB
50% flow
5% flow
max
Time
max
Time
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