ResMed Elisee 350, Клиническое руководство

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17/102 Ventilation
NOT013281-8
Influence of the choice of flow shape in ACV mode with the I:E ratio or the
Ti set
In this case, the flow decreases at the rate of one of four downward gradients: 2, 3, 4 or 5.
The Ti remains constant regardless of the flow shape selected ( ). Only the max
varies.
Influence of the choice of flow shape in ACV mode with the max set
The flow also decreases at the rate of one of four different gradients based on a percentage of
the max:
The max remains constant regardless of the flow shape selected ( ). Only the
Ti varies.
Apnea time Tapnea (s), specific to pressure support
Period of time after which, if inspiration is not initiated by the patient, the ventilator delivers an
inspiratory cycle to the patient. The apnea time begins at the point when the last cycle was
initiated by the patient. Example of apnea ventilation in PACV mode (Pi = 15 cm H
2
O):
V
t (s)
1
2
3
4
5
2: Max. flow = constant flow + 25%
1: Constant flow
3: Max. flow = constant flow + 50%
4: Max. flow = constant flow + 75%
5: Max. flow = constant flow + 100%
t (s)
1
2
3
4 5
°
V
°
V
°
V
Vmax
V
t (s)
Decreasing flow with a downward gradient set at up to 75% of max
°
V
Downward gradient set at up to 50% of max
°
V
Downward gradient set at up to 25% of max
°
V
Downward gradient set at up to 0% of max
°
V
t (s)
°
V
1
2
3
4 5
P
t
Tapnea (example:
20 s)
Inspiration triggered by the patient Apnea ventilation
Patient effort