ResMed Elisee 350 Clinical Manual page 24

Tidal volume V
The volume of air insufflated to the patient by the ventilator (V
by the patient (V
V
Rise time
The time it takes the ventilator to reach the set pressure. Four rise times are available, ranging
from 1 (shortest rise time, 100 ms depending on ventilation) to 4 (longest rise time, up to 600 ms,
depending on ventilation).
P
FiO (%)
2
Inspired oxygen fraction in the gas mixture delivered to the patient.
Inspiratory trigger TgI
A value which allows an inspiratory phase to be triggered. Can be defined in terms of either flow
or pressure:
•
Invasive inspiratory flow trigger TgI(
For use with a double circuit only. Recommended for ventilation requiring a very high level of
trigger sensitivity.
At the end of expiration, when the patient starts to inhale, the flow measured by the expiratory
sensor becomes lower than the flow measured by inspiratory sensor. The ventilator triggers an
inspiratory phase when this difference reaches the set value for the trigger (L/min).
The ventilator guarantees a constant minimum flow in the double circuit, called a flow-by, which
makes it possible to detect the difference between the inspiratory and expiratory flow at the end
of the patient's expiration.
•
Invasive inspiratory pressure trigger TgI(P)
Operates with a single or double circuit.
A vacuum in the respiratory circuit during the expiratory phase triggers the inspiratory phase
when the set trigger value is reached (measured in cm H
18/102
(mL)
T
).
TE
V
TI
V
TE
1 2 3 4
t
Set pressure
t (s)
t (s)
°
)
V
), and the volume of air exhaled
TI
O).
2
NOT013281-8