Hoffrichter CARAT II pro, User Manual

Page: 98 / 202

98 Chapter 5: Ventilation modes
FLOW RAMP
VCV AVCV
V-SIMV
The flow ramp can be set in the volume controlled modes as a constant inspi -
ration flow (level 1 ), as decelerating inspiration flow (level 2 , level 3 ,
level 4 ) or as an accelerating/decelerating inspiration flow (level 5 ). The flow
curve can be changed depending condition of lung (compliance and restistance).
INSPIRATION TRIGGER
APCV PSV PSV-S AVCV P-SIMV V-SIMV
The inspiration trigger is a volume trigger. It specifies the inspiration efforts of
patient equired to obtain pressure or volume support from the ventilator in the
case of spontaneous breathing.
Please always consider the patient’s clinical record when setting the trigger
levels in order to avoid the risk of auto triggering.
Once the set inspiratory trigger threshold (see Table 5) is reached, the device starts
the inspiratory phase.
Table 5: Thresholds
inspiratory
trigger
Level Volume threshold value Flow change in 30 ms
1 5 ml (± 20 %) 1,2 l/min
2 10 ml (± 20 %)
1,5 l/min
3 15 ml (± 20 %) 1,8 l/min
4 20 ml (± 20 %)
2,1 l/min
5 25 ml (± 20 %) 2,4 l/min
6 30 ml (± 20 %)
2,7 l/min
7 35 ml (± 20 %) 3,0 l/min
8 40 ml (± 20 %) 3,3 l/min
9 45 ml (± 20 %)
3,6 l/min
10 50 ml (± 20 %) 3,9 l/min
To avoid auto triggering, which are cause by artifacts of the single line patient cir-
cuit expiration valve, the "SMART Function" can be set (see page 100).