GE CARESCAPE, User Manual

Page: 340 / 548

Gas exchange
WARNING
Measurement results are valid only when the respiration
rate is <35/ minute due to non-adequate time for accurate
sampling.
VO
2
/VCO
2
values cannot be measured correctly:
●
With a leaking airway
●
With FiO
2
>85%
●
If N
2
O is used in ventilation
●
If the delivered FiO
2
level is fluctuating during inspiration
●
If Helium or Xenon are used in ventilation
Measurements cannot be taken during the following
ventilation modes due to non-adequate time for accurate
sampling:
●
High by-pass flow
●
High frequency ventilation (HFV)
●
Bi-level positive airway pressure (BiPAP)
Gas exchange cautions
CAUTION
Never connect the loose end of the gas sampling line to
the Patient Spirometry connector as this may break the
spirometry unit. The Patient Spirometry connector is meant
for the Patient Spirometry tube only.
CAUTION
Do not apply pressurized air or gas to any outlet or tubing
connected to the monitor. Pressure may destroy sensitive
elements.
Gas exchange measurement limitations
●
This measurement is not available in the NICU software package.
●
E-modules can be used within their specified performance range with OR, PACU,
ICU, and ED software packages.
●
Only the E-CAiOVX and E-COVX modules measure gas exchange.
NOTE
Routine calibration checks are required to ensure the
measurement accuracy.
Gas exchange points to note
●
Gas exchange measurement is for intubated patients only.
●
Use only 2-meter (7-ft) gas sampling lines. Using other lines may cause inaccurate
readings.
●
FiO
2
delivery from the ventilator side should be stable.
●
High PEEP or ventilating pressures may activate a message prompting to check the
water trap. In this case, you may consider decreasing the PEEP if possible.
●
To ensure measurement accuracy, check the accuracy of airway gas measurement
once a month: feed calibration gas mixture to the monitor in the normal operation
mode (without entering the calibration menu) and check that the readings on the
340 CARESCAPE Modular Monitors 2062971-001