Circuit Options; Assembling Patient Circuits - ResMed Astral Series Clinical Manual

Circuit options

Circuit options
The Astral device supports a range of circuits (the device and accessories assembled together) to suit
individual patient needs. The device uses interchangeable circuit adapters.
The following table may assist in selecting suitable circuits and settings for different patient types:
Tidal volume range
50 mL to 300 mL
> 300 mL

Assembling patient circuits

WARNING
•
Use a double limb circuit for direct measurement of exhaled volumes. In this configuration, the
expired volume is returned to the ventilator for independent measurement. (Astral 150 only)
•
The Astral device does not support monitoring of exhaled volumes when used with a single
limb circuit with expiratory valve.
•
The patient circuit should be arranged so as not to restrict movement or pose a strangulation
risk.
•
Only use circuit components that comply with the relevant safety standards including
ISO 5356-1 and ISO 5367.
CAUTION
For paediatric use, ensure that the patient circuit type fits and is suitable for use with a child. Use a
paediatric patient type for patients that weigh less than 23 kg and normally require less than
300 mL tidal volume.
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Recommended patient type setting Suitable circuit diameters
Paediatric
Adult
10 mm, 15 mm or 22 mm
15 mm or 22 mm