GE CARESCAPE ONE User Manual page 196

CARESCAPE ONE User Manual DRAFT 26 October 2017
CO₂
Problem
Why can we see dips in the capnogram during
expiration?
Why is the EtCO value considerably lower than
2
the CO partial pressure determined by blood gas
2
analysis?
The sample cell is inserted, but the pump does not
turn on and the Check Adapter message is displayed.
196
Solution
Dips in the capnogram can be due to patient
●
conditions. "Clefts" in the capnogram are seen
as action of muscle relaxant is impacted by
spontaneous ventilation.
The dips seen in the capnogram during expiration
●
may be related to the sidestream gas sampling, the
continuous gas flow to the Y-piece, and patient's
cardiac contractions, which cause intra-thoracic
pressure changes and therefore flow variations.
A pressure transducer in the LoFlo Sidestream
Module minimizes flow variations by measuring
and adjusting for changes in airway pressures.
EtCO values are always lower than paCO
●
2
measured by blood gas analysis.
The typical clinical reasons are dead-space
●
ventilation, ventilation/perfusion mismatch, a drop
in cardiac output, alveolar shunts, and incomplete
emptying of the alveoli.
The EtCO - paCO
●
2
a clinical condition such as an increase in alveolar
dead space.
Also check the integrity of the breathing
●
circuit; blood-gas analysis corrected to a lower
temperature in case of hypothermia.
Check that the sample cell is fully inserted.
●
The LoFlo Sidestream Module may need to warm
●
up to be detected.
Check that the LoFlo Sidestream Module is
●
connected to the CARESCAPE CO
Check the sample cell of the accessory for damage
●
or occlusion.
CARESCAPE ONE
values
2
gradient can be an indicator of
2
.
2
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