Dräger Babylog VN500 Instructions For Use Manual page 232

Technical Data
Alarm message
Pressure limited (ATC/PPS)
Airway pressure low
Volume monitoring
Alarm message
Volume measurement inac-
curate
VT not reached, leakage
VThf not reached
Pressure limited
232
Description/detection
The upper pressure limit is monitored to detect whether it is reached
when using ATC or PPS.
If the Paw high alarm limit can be adjusted, the alarm limit is derived
from this value and is in the range of Paw high –5 mbar (–5 cmH
Paw high –1 mbar (–1 cmH
value is to the ventilation which is currently being applied.
If the Paw high alarm limit is linked (Pmax/Paw high autoset), the
pressure limit corresponds to the value of the therapy control Pmax.
A too low airway pressure is monitored by checking whether the inte-
gral of the pressure measured value deviations from the lower pressure
level exceeds 22.5 mbar x s (22.5 cmH
Description/detection
The quality of the volume calculation is monitored. Due to leakage com-
pensation, the device is able to calculate a minute volume from the
measured expiratory minute volume which was applied to the patient.
The portion of the minute volume applied to the patient, which may be
considered as inaccurate due to the current ventilation situation, is set
in proportion to the calculated patient minute volume. If this ratio ex-
ceeds the value of 50 % for at least 30 seconds, an alarm is generated.
Volume-guaranteed breaths are monitored to detect whether the set
volume is reached. The alarm limit is set at 90 % of the set point VT.
During ventilation with Volume Guarantee, breaths are monitored to de-
tect whether the volume to be applied is reached if the applied ventila-
tion pressure cannot automatically be increased any further. The alarm
limit is set at the set value for the volume.
Instructions for Use Infinity Acute Care System – Babylog VN500 SW 2.n
O), depending how close the Paw high
2
O x s).
2
O) to
2