Accuracy Of Controls - ResMed Astral Series Clinical Manual

Notes:
• All flows and volumes are measured at BTPS conditions.
•
To achieve specified accuracies, a successful Learn Circuit must be performed prior to measurement testing.
Specified accuracies exclude mask compliance.
• Pressure may be displayed in cmH
the displayed pressure will have the same values regardless of the unit selected.

Accuracy of controls

The following table shows the setting range and accuracy for the adjustable parameters.
Parameter
Delivered Pressure
IPAP
EPAP
CPAP
PEEP
PS
P control
Vt (Tidal volume)
Safety Vt (Safety tidal
volume)
Target Va
Resp. rate
Target patient rate
Ti (Inspiration time)
PIF (Peak Inspiratory Flow)
Cycle (expiratory trigger)
O, hPa or mbar. The conversion factor of the pressure units is 1. This means
2
Range
2 to 50 hPa
4 to 50 hPa
2 to 25 hPa
3 to 20 hPa
Off, 3 to 20 hPa
2 to 50 hPa (Valved circuits)
0 to 50 hPa (iVAPS)
2 to 50 hPa
Adult: 100 to 2500 mL
Paed: 50 to 300 mL*
Adult: 100 to 2500 mL
Paed: 50 to 300 mL*
1 to 30 L/min
Adult: Off, 2 to 50 bpm
Paed: Off, 5 to 80 bpm
Adult: 8 to 30 bpm
(A)CV, V-SIMV (mandatory
breaths):
0.3 to 3.0 sec
P(A)CV, P-SIMV (mandatory
breaths):
0.2 to 5.0 sec
P(A)C:
0.3 to 4.0 sec
(A)CV, V-SIMV (mandatory
breaths):
Adult: 10 to 120 L/min
Paed: 5 to 60 L/min
5 to 90%, Auto
Resolution Accuracy
±(0.5 hPa + 5% of target)
0.2 hPa Refer to delivered pressure
0.2 hPa Refer to delivered pressure
0.2 hPa Refer to delivered pressure
0.2 hPa Refer to delivered pressure
0.2 hPa Refer to delivered pressure
0.2 hPa Refer to delivered pressure
10 mL Valved circuits:
5 mL ±12 mL or 10%, whichever is greater
10 mL Vented circuits:
5 mL ±15 mL or 15%, whichever is greater
Valved circuits:
±12 mL or 10%, whichever is greater
0.1 L/min ±(0.1 +30% of target) L/min;
Resp.rate < 12 bpm
±(0.1 +15% of target) L/min;
Resp.rate ≥ 12 bpm
1 bpm ±2%
1 bpm ±2%
Adult: 0.1 sec ±(20 ms + 5% of setting)
Paed: 0.05 sec
1 L/min N/A
5% N/A
Accuracy of controls
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