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5.7 Volume Support (VS)
Volume Support (VS):
• is initiated by the patient, who controls the
respiratory rate
• delivers ventilator support with a variable
peak pressure and decelerating flow to
guarantee the preset tidal volume
• the inspiratory pressure of a breath will
never exceed 5 cmH
2
O below the upper
pressure limit
• provides backup (PRVC) ventilation in case
of apnea
A patient-adapted constant inspiratory support
is supplied when activated by patient effort.
The resulting volume is continuously
monitored and the constant inspiratory
pressure automatically adjusts to the required
level. The patient determines the frequency
and duration of the breaths which have a
decelerating flow pattern.
1 2 3 4
5 6
8 9
7
10
The following parameters are set:
1. Oxygen concentration (%)
2. PEEP (cmH
2
O)
3. Tidal volume (ml)
4. End inspiration (%)
5. Inspiratory rise time (s)
6. Trigger
7. Apnea time (s)
8. Backup respiratory rate (b/min)
9. Backup tidal volume (ml)
10. Backup I:E or T
i
(s)
Refer to section Settings on page 43.
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SERVO-air Ventilator System v2.2, User's Manual
| 5 | Ventilation modes |