Hoffrichter CARAT II pro, User Manual

Page: 100 / 202

100 Chapter 5: Ventilation modes
SMART FUNCTION
APCV PSV PSV-S AVCV P-SIMV V-SIMV
The "SMART Function" can be set to avoid auto triggering, which are cause by
artefacts of the single line patient circuit expiration valve. These artifacts lead to a
breath triggering in the absence of effort by the patient during expiration.
Without SMART Function
The inspiration trigger is initiated by artefacts.
t (s)
V (ml)
Volume curve
Trigger activity
t (s)
Trigger threshold
Trigger threshold
V (ml)
Artefacts Spontaneous breathing
IPAP = 20 hPa Inspiration trigger = Level 9

Triggered by artefacts

Trigger by patient (spontaneous breathing)
Figure 44: Inspiration trigger without SMART Function