ResMed Elisee 350, Clinical Manual

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NOT013281-8
Plateau time (s)
The period of time at the end of the inspiratory phase, during which there is no flow and the
inspiratory and expiratory valves are closed.
Inspiratory time Tinsp (s)
The length of the inspiratory phase, corresponding to the total of the insufflation time plus the
plateau time.
Maximum insufflation time Ti Max (s)
In the assisted modes, maximum time during which the machine delivers insufflation to the
patient even if the set volume is not reached.
I:E ratio (inspiration to expiration ratio)
The ratio of inspiration time to expiration time (Te) for each breath.
Example: If the respiratory rate is 20 bpm, each breath lasts for 3 seconds. If the I:E ratio is 1:2,
Ti = 1 second and Te = 2 seconds.
Max. flow max (L/min) or inspiratory flow
The maximum inspiratory flow delivered to the patient. Its setting in volume-controlled modes
has a direct influence on the inspiratory time and the I:E ratio. It is fixed and known in volume-
controlled modes, but variable and not controlled in pressure-controlled modes.
Flow shape
In volume-based modes, the flow rate delivered by the device may be constant or decreasing.
The delivered tidal volume and the respiratory rate are maintained.
The flow level is set indirectly by the setting of the I:E ratio or the Ti, or directly by the setting of
the Flow parameter:
•
With a constant flow rate, the delivered flow is noticeably constant throughout the active
inspiratory phase
•
With a decreasing flow rate, the delivered flow decreases throughout the active inspiratory
phase at the rate of one of four different gradients.
Note:
During ventilation, in ACV or SIMV mode, the duration of the insufflation time Ti is set
directly on the Elisée 350 screen by pressing the Ti button, or indirectly through the setting of
the
max or the I:E ratio.
°
V
V V
Vmax
Decreasing flow rate
Constant flow
rate
Time
Time
Decreasing flow rate
With I:E or Ti setting
With max. flow ( max) setting
°
V
Constant flow rate
°
V