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CO2 with CAPNOSTAT Mainstream, CapnoFlex LF, and Dual CO2 modules
●
Rebreathing when a rebreathing system without a CO
2
absorber is used with
inadequate fresh gas flows.
NOTE
During some surgical procedures, e.g. laparoscopy, CO
2
may
be used to inflate the abdomen which may result in rise of
PaCO
2
due to the absorption of CO
2
into the blood via the
vascular wound bed. This may lead to an increase in the
EtCO
2
.
Prevention of the breathing system contamination
You can use a microbial filter between the endotracheal tube and the airway adapter.
Change the filter for every patient. Change the patient circuit at intervals given in the
circuit manufacturer’s documentation, and according to your hospital protocols.
How to prevent effects of humidity
During low flow anesthesia, more rebreathed gas circulates through the CO
2
absorber.
More humidity and heat enter the circuit from the CO
2
absorber and from the air
exhaled by the patient. Also, mechanical ventilation with active humidification system
used in intensive care increases the humidity in the breathing system. Water traps
placed in the inspiratory and expiratory limbs of the breathing system are useful for
collecting condensed water from the breathing system during long-lasting anesthesia
or mechanical ventilation with active humidification system.
AquaKnot with the Dual CO2
●
Always use the Aqua-Knot water trap with the Dual CO2 module. The water trap
holds 7 cc of water.
●
The arrow on the Aqua-Knot shows the direction of the gas flow. When inserting
the water trap, the arrow should point toward the module.
●
Routine replacement of Aqua-Knot is not required.
CAPNOSTAT Mainstream and Dual CO2 sensor placement
Always position the sensor with adapter in an upright position to avoid collection of
fluids on the windows of the adapter. Large concentrations of fluids at this point
will obstruct gas analysis.
CO
2
troubleshooting
Problem Solution
Calibration fails.
●
Make sure you calibrate in a stable condition.
●
Check that the module is properly connected.
CO
2
waveform seems abnormal.
●
Check the sample lines, water trap, and airway
adapters. Replace if necessary.
Elevated baseline.
●
Check the patient status.
●
Check the sensor.
●
Make sure the patient is not breathing CO
2
. Check
that the amount of fresh gas is sufficient for the
patient, and check that the CO
2
absorber is in
good condition.
320 CARESCAPE Modular Monitors 2062971-001