Weinmann MEDUMAT Standard2 Step-By-Step Instructions page 11

Pressure support and
the expiratory trigger
Pressure
PEEP
100%
0%
The pressure support is always given as a value above PEEP. In addition to the set
PEEP, a patient receives this as soon as the inspiration trigger has been detected.
Example calculation:
PEEP = 5 mbar, ΔpASB = 10 mbar inspiration pressure in the inhalation phase = 15 mbar
The expiratory trigger initiates expiration as soon as the flow to the patient is only
the set value (in %) with respect to the maximum flow. The length of the pressure
support is set with the expiratory trigger.
Trigger sensitivity: 5 % - 80 % of the maximum flow . In principle, the following applies:
the smaller the % value, the longer the pressure support lasts.
Setting the levels of the expiratory trigger:
(If "3 levels" has been chosen as the trigger setting in the operator menu)
Trigger level
Level 1 (long)
Level 2 (medium)
Level 3 (Short)
Flow
Max. 4 s
5% Flow
Pressure support ΔpASB
Expiratory trigger
ΔpASB
max
Corresponding unit value
Approx. 10% Flow max
Approx. 35 % Flow max
Approx. 70 % Flow max
Time
80% Flow
max
5%
Time