116
10.13 Oxygen adjustment response time
The table below indicates the time required for oxygen concentration in the delivered volume to change
from a fraction of 21% to 90% of the maximum oxygen concentration adjustable using the maximum internal
volume respiratory system configuration.
Table 22
– Oxygen adjustment response time
Delivered volume
(mL)
Maximum
response time
(s)
500
98
150
83
30
360
10.14 Accuracy of settings
The following table shows the maximum error between the adjusted value and the value applied by the
ventilator.
Table 23
– Accuracy of settings
Item
Parameter
Accuracy
1,2
1
Tidal volume (All range)
1
± (4 mL + 15% of set
volume)
2
Inspiratory pressure
± (2 cmH
2
O + 4% of
set pressure)
3
PEEP
± (2 cmH
2
O + 4% of
set PEEP)
4
FiO
2
± (5% + 2,5% of set
FiO
2
)
1 The volume and pressure accuracy are preserved for respiratory circuits with resistance up to 1.9
cmH
2
O and compliance up to 5 mL/cmH
2
O
2 Performance accuracies were determined in the worst-case configuration, with respiratory circuit with
water trap, heated humidifier, proximal flow sensor and CO
2
sensor, because they have greater
compliance and a greater number of potential leakage points.
The performance accuracies were determined through a test system with the measurement uncertainties
described in the table below:
