Lowenstein Medical elisa 300, Инструкция по эксплуатации

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Ventilation modes and parameters | A 5
Instructions for Use elisa 300-500 | Supplement A | SW 2.09.x | Rev. 11
95
A 5.4
Ventilation parameters
Different parameters are available to set the ventilation modes:
O
2
Inspiratory O
2
concentration
PEEP Positive end-expiratory pressure
Insp. Ramp Inspiratory time ramp between PEEP and Pinsp
PS Ramp Time ramp between PEEP and PS
Pinsp Inspiratory pressure
PS Pressure support
Tinsp
Inspiratory time,
inspiratory/expiratory ratio I:E is also shown
PS TImax Maximum duration of inspiratory phase with pressure support
Exp. trigger
Expiratory trigger with pressure-controlled ventilation
Percentage of the trigger expectation window
for the synchronised switch to expiration
PS Endflow Stop criterion of inspiratory phase with pressure support
Rate Respiratory rate
Trigger
The ventilator detects the patient's attempts to breathe in via the trigger.
Trigger sensitivity can be individually adapted to the patient. The lower the
set value the more sensitive the ventilator is to patient's attempts at inhaling.
At very low settings, even the elasticity of the ventilation tubes might cause a
trigger signal (auto-triggering).
Vt Tidal volume
Byflow
As bias flow, the Byflow provides the set trigger flow and simultaneously pre -
sents a kind of “flow reservoir” for the spontaneously breathing patient. The
Byflow function is available in all ventilation modes. The setting can be in -
creased if the dynamic behaviour of the device is unsatisfactory during or after
triggering when using endotracheal tubes with a deflated cuff, or if rebreathing
of CO
2
is to be prevented when a ventilation helmet is used.
Pmax
A pressure limit can be set in order to rule out excessively high pressure
values in case of an acute worsening of the mechanics of breathing. No further
pressure adjustments are carried out if the pressure limit has been reached.
The “Pressure limitation” alarm is triggered. The Vtmin alarm limit must be
set in order to be able to recognise that the set tidal volume has not been
reached.
For volume-controlled modes, the pressure limitation Pmax can be deactivat -
ed on the configuration level.
Pmin
In pressure-controlled or pressure-supported ventilation modes with speci-
fied volumes, Pmin represents the lower pressure adaptation window. If the
required pressure drops below this setting, the automatic pressure adaptation
is suspended. To prevent unintended high tidal volumes, it is necessary to set
the Vtmax alarm limit.
I-Flow Inspiratory gas flow rate
Tplateau Duration of the plateau during the inspiratory phase (No-flow phase)
Flow support Extent of the resistance compensation