GE CARESCAPE, User Manual

Page: 342 / 548

Gas exchange
NOTE
Place all D-lite ports upwards with a 20° to 45° tilt to prevent
condensed water from entering the sensor interior and the
tubings.
NOTE
When monitoring pediatric patients with tidal volumes of 15
to 300 ml, use the Pedi-lite(+) sensor. Remember to select the
sensor type accordingly.
Checking the gas exchange measurement
1. Check that the water trap is empty.
2. Occlude the sampling line and check that the Sample line blocked message
appears within 30 seconds and gas waveforms are showing zero at the same time.
Using the gas exchange measurement
Selecting the gas exchange sensor type
Select the sensor type ( Adult or Pedi ) according to the sensor you are using.
1. Select the gas exchange parameter window.
2. Select the Setup tab.
3. Select the sensor type from the Sensor Type list.
Selecting EE and RQ averaging time
Averaged values of energy expenditure (EE) and respiratory quotient (RQ) update
every minute. The bar in the EE+RQ parameter window indicates with green color the
amount of data that the monitor uses for performing the average calculations.
When a patient is admitted/a case is started, no averaged value is displayed until 10
minutes of valid EE and RQ data is available. After that, the EE and RQ values are gray
until there is enough (> 1/5 of the selected averaging time) data to perform reliable
calculations.
1. Select the gas exchange parameter window.
2. Select the Setup tab.
3. Select a value from the EE Average Time list.
NOTE
The values in the parameter window turn gray whenever
there is not enough valid EE and RQ averaging data.
NOTE
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 average calculations.
Weighted VO
2
and VCO
2
To have weighted values for VO
2
( VO2/kg or VO2/m2 ) and VCO
2
( VCO2/kg or VCO2/m2 ),
you must enter the patient’s height and weight. For VO2/kg and VCO2/kg , measured
values are divided by the patient’s weight, and for VO2/m2 and VCO2/m2 , measured
values are divided by the patient’s BSA.
342 CARESCAPE Modular Monitors 2062971-001