Technical Specifications - ResMed Astral Series User Manual

Technical specifications

Operating pressure range
Pressure accuracy
Operating tidal volume range (volume
control modes)
Circuit resistance and compliance range
for stated accuracy of monitoring and
control
2
Breathing resistance under single fault
Maximum flow
Flow accuracy
Inspiratory trigger (nominal)
characteristics
Expiratory cycle (nominal)
characteristics
Sound pressure level
Sound power level
Alarm volume range
Single limb with valve or double limb with valve: 3 to 50 hPa
Single limb with intentional leak: 2 to 50 hPa
CPAP: 3 to 20 hPa
Maximum working pressure limit: 10 to 80* hPa
*Not applicable on all device variants
Forced cycling occurs if the Pressure alarm limit is exceeded.
±(0.5 hPa + 4% of actual pressure)
Adult patient type: 100 to 2500 mL
Paediatric patient type: 50 to 300 mL
Paediatric patient setting:
Circuit resistance range (circuit with intentional leak): 0 to 8 hPa at
60 L/min
Circuit resistance range (circuit with valve): 0 to 20 hPa at 60 L/min
Circuit resistance range (mouthpiece circuit): 0 to 5 hPa at 60 L/min
Circuit compliance range: 0 to 4 mL / hPa
Adult patient setting:
Circuit resistance range (circuit with intentional leak): 0 to 20 hPa at
120 L/min
Circuit resistance range (circuit with valve): 0 to 35 hPa at 120 L/min
Circuit resistance range (mouthpiece circuit): 0 to 15 hPa at 120 L/min
Circuit compliance range: 0 to 4 mL / hPa
Paediatric circuit
3
Inspiration: 2.2 hPa (at 15 L/min), 5.3 hPa (at 30 L/min)
Expiration: 2.4 hPa (at 15 L/min), 5.0 hPa (at 30 L/min)
Adult circuit
Inspiration: 5.7 hPa (at 30 L/min), 8.3 hPa (at 60 L/min)
Expiration: 4.2 hPa (at 30 L/min), 6.2 hPa (at 60 L/min)
220 L/min
±1 L/min or 10%*, whichever is greater
*When Resp. rate ≥ 8/min, and Pressure ≤ 30 hPa for circuits with
intentional leak, and with non-compliant interface.
Inspiratory trigger occurs when patient flow exceeds trigger setting.
Double limb with valve (flow trigger): 0.5 to 15.0 L/min
Single limb with valve or double limb with valve: 1.6 to 10.0 L/min (in five
steps)
4
Single limb with intentional leak: 2.5 to 15.0 L/min (in five steps)
Mouthpiece (tube only) circuit: 2.0 to 4.0 L/min (in four steps)
Cycle occurs when inspiratory flow declines to the set percentage of peak
inspiratory flow.
5 to 90%
35 ± 3 dBA as measured according to ISO 80601-2-72
43 ± 3 dBA as measured according to ISO 80601-2-72
56 - 85 dBA (in five steps) as measured according to IEC 60601-1-8
Technical specifications
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