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Carbon Dioxide (CO
2
) Sensor and Airway Adapter Tube
Airway Adapter Tube
The Model 9840AAT Airway Adapter Tube (Figure 7) is a single-use only, disposable adapter designed
to be placed between the endotracheal tube and the breathing circuit of intubated patients. The airway
adapter tube connects to the CO
2
sensor so that the two devices do not move relative to each other (you
may notice the connection by feel or sound).
The CO
2
detector will not function properly unless the light emitting and detecting elements of the CO
2
sensor are properly aligned with the windows in the airway adapter tube.
Figure 7: Model 9840AAT Airway Adapter Tube
WARNING: Do not use the Model 9847 CO
2
detector for patients younger than 3 years
old and weighing less than 10 kg (22 lb) due to the dead space introduced by the
airway adapter tube.
WARNING: Do not reuse the Model 9840AAT Airway Adapter Tube.
WARNING: If the airway adapter tube becomes contaminated or damaged, discard it
and replace it with a new one. Cleaning the interior will damage the anti-fog coating
and cause inaccurate readings.
WARNING: Do not use the airway adapter tube if the airway adapter tube is below
5 °C. An airway adapter tube that is below 5 °C may frost, causing a false reading.
Warm the airway adapter tube to above 5 °C by putting it in a warm place (for example
in your hands or in a vehicle) before use.
WARNING: The Model 9840AAT Airway Adapter Tube will increase dead space by
approximately 6 cubic centimeters (0.4 cubic inches); this may adversely affect
ventilation for patients with small tidal volumes.
CAUTION:
An airway adapter tube that is between 5 °C and 10 °C may cause
inaccurate readings due to fogging of optical surfaces. It is recommended that the
airway adapter tube be warmed to above 10 °C before use.
!
Windows
Tabs
(To Breathing
Device)
(To Endotracheal
Tube)
Reflector