ResMed Astral Series User Manual page 28

There are three circuit adapters:
Adapter
1 Single limb leak
2 Single limb
3 Double limb
(Astral 150 only)
A Learn Circuit should be performed after any change of circuit. Astral will provide accurate therapy as long as the Learn Circuit
is completed. Refer to Learn Circuit (see page 30) for further information.
WARNING
The measurement of patient exhaled gas volume may be affected by leak.
Helpful hint!
Only use adapters and circuits as directed by your clinician.
For use with
Single limb circuit with intentional leak or mouthpiece circuit
Single limb circuit with expiratory valve (expiratory valve integrated into the circuit)
Double limb circuit (expiratory valve integrated into the adapter) OR single limb circuit with
intentional leak or mouthpiece circuit
Assembling patient circuits
English 23