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Description
I
I
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I
With's rapid increase in pressure A
Evita 2 supports the patient's insufficient spontaneous breathing with a high
peak flow.
With a slow increase in pressure fl
Evita 2 starts gently with regular inspiratoty flow. The patient has to take over
more breathing and the breathing muscles are being stimulated.
With the adjlisted pressure increase and ASB pressure, the patient
determines the required inspiratory flow by his own breathing activity. which
can rise in 8 ms to 2 Us.
ASB is terminated:
when inspiratory flow returns to zero during phase 1; i.e. when patient
exhales or fights the ventilator
Or
when the inspiratory flow in phase II falls below a certain ratio of
the maximum value previously supplied:
for adult ventilation 25 % Vi..p
for paediatric ventilation 6 % Vinsp
Or
after 4 seconds at the latest if the hvo other criteria have not come into
operation.
If the 4 seconds criteria comes into operation three times in succession,
Evita 2 sounds an alarm, and warns of a possible teak in the ventilation
system.
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