Assembling patient circuits
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Connecting a double limb circuit (Astral 150 only)
The Astral device measures exhaled air flowing through the double limb circuit adapter. This enables
patient-exhaled tidal volume to be accurately measured and monitored.
To connect a double limb circuit:
1. Ensure the device is fitted with the double limb adapter (otherwise change the adapter).
2. Connect the ends of the air tubing to the inspiratory and adapter ports on the device.
3. Attach any required circuit accessories (eg, humidifier or filter).
4. Select the circuit type and perform a Learn Circuit.
5. Attach a patient interface (eg, mask) to the end of the air tubing.
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