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Gas exchange
Problem Solution
Can I have the EE and RQ value trend information
with one-minute resolution? You can have a one-minute average of EE and RQ
numbers on the numeric trend data page. These
numbers are updated according to the selected time
interval. By selecting EE and RQ into the graphical
trends, you will see them updating every minute.
Can the gas exchange modules be used with active
humidification?
Yes, they can. Use the D-lite+/Pedi-lite+ flow sensor
for humid conditions. If HME is used, both the
D-lite/Pedi-lite and D-lite+/Pedi-lite+ can be used.
Can the gas exchange modules be used with pediatric
patients? Yes, for those pediatric patients whose respiration
rate is below 35 breaths/minute. When monitoring
pediatric patients, use the Pedi-lite sensor and select
the sensor accordingly from the monitor menu.
How can I ensure that the VCO
2
and VO
2
values are
correct?
Always make sure that you are using correct
accessories and that the measurement setup and
patient connections are correct.
Why does the RQ value rise above 1.0? The physiological range of RQ is usually between 0.7
and 1.0. If the value is out of this range, check the
measurement setup.
Why does the RQ value sometimes show
unphysiological values such as RQ < 0.6? Usually this is due to a non-steady state: the
ventilator settings have been changed, FiO
2
has
changed, the ventilation is irregular.
Why is there no EE and RQ data in the trend history? If the RQ is out of the physiological range (<0.6 or
>1.3), the monitor does not store the EE and RQ values
in the trend history or use them for calculating the
average values.
Why is there no numeric EE and RQ data in the
parameter window although the monitor shows the
data of VCO
2
and VO
2
?
EE and RQ are averaged values. It takes some time
to initialize the averaging buffer (depending on the
selected averaging time) to display data. When a
patient is admitted/a case is started, no EE and RQ
values are shown for 10 minutes. After that, they
are gray until there is enough data for average
calculations.
If RQ is not within the physiological range, the values
will not be added to the averaging buffer.
The bar in the lower part of the parameter window
indicates the amount of data that the monitor uses
for performing the average calculations.
Why are the EE and RQ values shown in gray?
EE and RQ are gray when there is not enough (> 1/5
of the selected averaging time) valid data available
for reliable calculations.
348 CARESCAPE Modular Monitors 2062971-001