10.7.1 PRVC in detail
1
2 3
PRVC properties
1. PRVC assures a set target minute volume
to the patient. The target volume is based
upon settings for Tidal Volume (shaded
area), respiration rate and inspiration time.
2. The inspiratory pressure level is constant
during each breath, but automatically
adapts in small increments
breath-by-breath to match the patient´s
lung mechanical properties for target
volume delivery.
3. Inspiration starts according to the preset
respiratory rate or when the patient
triggers.
Expiration criteria
Expiration begins:
• After the termination of preset inspiration
time
• If the upper pressure limit is exceeded.
• If the measured inspiratory tidal volume
exceeds the pre-set tidal volume by 130%.
10.7.2 Important considerations
Fluctuations in compliance during a patient
case, e.g. moving the patient, will cause the
system to make adjustments to the
compliance compensation. Consider the
appropriate mode before starting the patient
case. Monitor the patients dynamic
compliance, 'C dyn', during run mode.
PRVC is not recommended when there is a
leakage in the patient´s breathing circuit
FLOW-i 4.2, User's Manual
221
| Ventilation modes |
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