Displayed values
Value
Pressure sensor at air outlet:
Mask pressure
Flow derived values:
Leak
Tidal volume
Respiratory rate
Minute ventilation
Ti
I:E ratio
Value
Pressure measurement
1
:
2
Mask pressure
Flow and flow derived values
1
:
Flow
2
Leak
2,3
Tidal volume
2,3
Respiratory rate
Minute ventilation
2,3
1
Results are expressed as STPD (Standard Temperature and Pressure, Dry). 101.3kPa at an operating temperature of 68°F (20°C), dry.
2
Accuracy may be reduced by the presence of leaks, supplemental oxygen, tidal volumes <100 mL or minute ventilation <3 L/min.
3
Measurement accuracy verified as per ISO 10651-6:2004 for Home Care Ventilatory Support Devices (Figure 101 and Table 101) using
nominal ResMed mask vent flows.
Measurement system uncertainties
In accordance with ISO 80601-2-70:2015 the measurement uncertainty of the manufacturer's test equipment is:
For measures of flow
For measures of volume (< 100 mL)
For measures of volume (≥ 100 mL)
For measures of pressure
For measures of time
Pressure accuracy - CPAP
Maximum static pressure variation at 10 cm H
Without humidification
With humidification
Maximum dynamic pressure variation according to ISO 80601-2-70:2015
Device without humidification and Standard air tubing / Device with humidification and Standard air tubing
Pressure [cm H
O (hPa)]
2
4
8
12
16
20
22
Range
3–30 cm H
O
2
0–120 L/min
0–4000 mL
0–50 BPM
0–30 L/min
0.1–4.0 sec
1:100–2:1
Accuracy
1
±[0.5 cm H
O (0.5 hPa) + 4% of measured value]
2
±6 L/min or 10% of reading, whichever is greater, at 0 to 150 L/min positive flow
±12 L/min or 20% of reading, whichever is greater, 0 to 60 L/min
±20%
±1.0 BPM
±20%
± 1.5 L/min or ± 2.7% of reading (whichever is greater)
± 5 mL or 6% of reading (whichever is greater)
± 20 mL or 3% of reading (whichever is greater)
± 0.15 cm H
O (0.15 hPa)
2
± 10 ms
O (10 hPa) according to ISO 80601-2-70:2015
2
Standard air tubing
± 0.5 cm H
O (± 0.5 hPa)
2
± 0.5 cm H
O (± 0.5 hPa)
2
10 BPM
15 BPM
0.5 / 0.5
0.5 / 0.5
0.5 / 0.5
0.5 / 0.5
0.5 / 0.5
0.5 / 0.5
0.5 / 0.5
0.5 / 0.5
0.5 / 0.5
0.5 / 0.5
Display resolution
0.1 cm H
O
2
1 L/min
1 mL
1 BPM
0.1 L/min
0.1 sec
0.1
SlimLine air tubing
± 0.5 cm H
O (± 0.5 hPa)
2
± 0.5 cm H
O (± 0.5 hPa)
2
20 BPM
0.8 / 0.8
0.8 / 0.8
0.8 / 0.8
0.8 / 0.8
0.8 / 0.8