Multi-Step Recruitment - Dräger Perseus A500 Instructions For Use Manual

Multi-step recruitment

This maneuver applies a sequence of pressure-
controlled mandatory breaths at variable pressure
levels. The inspiratory pressure and expiratory
pressure are increased in steps and then reduced
again to the starting levels. For parameters such
as RR and Ti, the values from the previous
ventilation mode are used. If there is no value
available for the Slope parameter, a value of
0.2 seconds is used.
Procedures
K
T U V
S R
K Trends of the measured values of pressure,
compliance, or tidal volume
L Predicted trends of inspiratory pressure and
expiratory pressure during the maneuver
("what if..." function)
The exact progress of the maneuver is influ-
enced by the following values:
– Parameters entered in this dialog
– Values set for RR and PEEP in the therapy
bar
M Values of pressure, compliance, or tidal vol-
ume
1 Using the Pinsp max (S) and PEEP max (R)
therapy controls, set the pressures that are to
be reached during the maneuver.
Instructions for use Perseus A500 SW 2.0n
L M
W
N
Q
O
P
2 If required, touch the More button (Q) to
display the following settings:
T ∆Pressure
U Breaths@Max Number of breaths at the
V Breaths/Step
W Reminder
3 Touch the Start button (N) and confirm.
During the maneuver, the inspiratory pressure is
automatically increased in steps to the set
maximum Pinsp max value and the expiratory
pressure is increased to the maximum PEEP max
value. Both pressures are held at the highest
pressure level for a certain number of breaths
Breaths@Max and then reduced again in steps.
The level of the pressure rise and the pressure
decrease is dependent on the selected patient
category. The appropriate settings are made in the
system setup.
The Paw high alarm limit is checked at the start of
the maneuver. If the alarm limit is too low, it is
changed to a value 5 hPa above the set pressure.
After the maneuver, the alarm limit is reset to its
original value.
Operation
Pressure difference
between Pinsp and
PEEP with which the ven-
tilation is performed
during the maneuver.
After the set maximum
pressures for PEEP max
or Pinsp max is reached,
the pressure difference is
adapted accordingly so
that the set values for
both PEEP max and
Pinsp max can be
reached.
Pinsp max pressure level
Number of breaths after
which the next pressure
step begins
Time after which a
reminder for a new
maneuver is issued
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