Engler ADS 2000 - Flow Rate Understanding

Inspiratory Time cont.
Once the chest is filling normally, raise the FLOW RATE up to a reasonable
Inspiratory Time.
3. If the Inspiratory Time exceeds 3 seconds, the ALARM will sound. This may be
due to the Flow Rate being too low, but is usually caused by a leak in the system.
Most of the time the problem will be a leaking endotracheal tube cuff. This can
almost always be detected by carefully listening for a leak during inhalation.
DISPLAYING TIDAL VOLUME
Tidal Volume can be displayed instead of Minute Volume Per Kilogram when in
Normal and LAB MODE. This option is always available by pressing WEIGHT UP
while the SET / RUN switch is on RUN. This option can also be initiated upon start-up .
In order to have the ADS 2000 display the Tidal Volume, press the Flow Rate up
button while turning the ADS 2000, ON.
To exit this mode, press WEIGHT DOWN while the SET / RUN switch is on RUN or
turn the ADS 2000 OFF and restart the unit.
UNDERSTANDING FLOW RATE
The Flow Rate displayed on the ADS 2000 is an instantaneous value, i.e. if the ADS
2000 was set to 24 LPM and if the unit were to have an inspiratory time of 1 minute,
then 24 liters of gas would have been used. In reality, the ADS 2000 only allows gas to
flow when a breath is being delivered. In order to determine the "Actual FLOW RATE" a
simple calculation can be performed.
This calculation is as follows:
F
ave. = (
F
ins x
T
on x
B
) / 60
Where:
F
ave.= Actual Flow Rate
F
ins.= Flow Rate on LCD Display
T
on= Inspiratory Time
B
= Actual Breaths Per Minute
ADS 2000 Engler Engineering Corporation 17