Volume Guarantee - Dräger Babylog VN500 Instructions For Use Manual

Volume Guarantee

Paw
PEEP
Flow
With the Volume Guarantee additional setting, the
mandatory breaths are volume controlled. To apply
the set tidal volume, Babylog VN500 controls the
inspiratory plateau pressure Pinsp.
Changes in lung conditions (compliance, resis-
tance) are compensated. The tidal volume of the
mandatory breaths remains constant.
Volume Guarantee can be switched on in the
PC-SIMV, PC-CMV, PC-AC and PC-PSV ventila-
tion modes. In the PC-MMV and SPN-CPAP/VS
ventilation modes, volume guarantee is always
available.
The advantage in contrast to time-cycled, pressure-
limited ventilation, is that changes in lung condi-
tions (compliance, resistance) have no impact on
the tidal volume. If, for example, compliance in-
creases, the inspiratory pressure decreases auto-
matically. If, for instance, compliance decreases,
then pressure rises but only up to the set pressure
limit Pmax.
Instructions for Use Infinity Acute Care System – Babylog VN500 SW 2.n
Pinsp = RR (VT, C)
Ti Te
1
RR
VT
without spontaneous
breathing
with spontaneous breathing
If Pmax is not linked to the alarm limit Paw high,
Babylog VN500 increases Pinsp up to a maximum
of 5 mbar (5 cmH O) below the set alarm limit Paw
2
high.
Fluctuations in spontaneous breathing are also
compensated. The greater the patient's inspiratory
efforts, the lower the pressure Babylog VN500
applies. Thus with Volume Guarantee,
Babylog VN500 always ventilates with just the right
pressure required for the tidal volume desired. The
pressure load on the lungs is limited to the extent
absolutely necessary.
Without Volume Guarantee, the user must adjust
the inspiratory pressure to reach the tidal volume
desired.
The control works in the range PEEP + 0.1 mbar
(+ 0.1 cmH O) to Pmax (or Paw high – 5 mbar
2
(5 cmH O)) for spontaneous breaths. For triggered
2
mandatory breaths, the control works in the range
PEEP + 5 mbar (5 cmH
– 5 mbar (5 cmH O)). Using the setting Pmax or
2
the alarm limit Paw high – 5 mbar (5 cmH
user limits the maximum pressure of the device.
Description
Paw high
t
t
O) to Pmax (or Paw high
2
O), the
2
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