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Carbon Dioxide Sensor and Airway Adapter Tube
Airway Adapter Tube
The Model 9840AAT Airway Adapter Tube (figure 8) is a single-use only, disposable adapter designed
to be placed between the endotracheal tube and the breathing circuit of intubated animals. The airway
adapter tube connects to the CO
2
sensor.
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 8: Model 9840AAT Airway Adapter Tube
Attaching the Airway Adapter Tube to the CO
2
Sensor
1. While grasping the large end of the airway adapter tube, place the clear windows of the tube
toward the CO
2
sensor (figure 9-A). The reflector should face away from the CO
2
sensor.
NOTE:
It is possible to force the airway adapter tube and the CO
2
sensor into an improper
alignment and connection. However, the CO
2
detector will not function properly unless these
pieces are correctly attached to each other.
WARNING: Do not reuse the Model 9840AAT Airway Adapter Tube. Cleaning the
interior will damage the anti-fog coating and cause inaccurate readings or a CO
2
sensor alarm.
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 animals with small tidal volumes.
CAUTION:
Do not use the airway adapter tube if the airway adapter tube is below
5 °C (41 °F). An airway adapter tube that is below 5 °C (41 °F) may frost, causing a
false reading. Warm the airway adapter tube to above 5 °C (41 °F) by putting it in a
warm place (for example in your hands or in a vehicle) before use.
CAUTION:
An airway adapter tube that is between 5 °C (41 °F) and 10 °C (50 °F)
may cause inaccurate readings due to fogging of optical surfaces. It is recommended
that the airway adapter tube be warmed to above 10 °C (50 °F) before use.
!
!
Windows
Tabs
(To Breathing
Device)
(To Endotracheal
Tube)
Reflector