Abiomed Impella 5.0 Gebrauchsanweisung Seite 15

a. To select the default purge fluid values displayed on the screen, scroll to and select OK. This will
select those values and automatically advance to the next screen.
b. To change the purge fluid information, scroll to the appropriate item and push the selector knob to
select it. Then scroll through the values and push the selector knob to make a new selection. (Refer
to "Entering Purge Fluid Data" in the Case Start discussion at the beginning of this section for a
listing of purge fluid, dextrose concentration, and heparin concentration options.) The controller will
use the default values if no other selections are made.
PATIENT WEANING
Weaning the patient from the Impella
The following weaning protocols are provided as guidance only.
RAPID WEANING
1.
Initiate rapid weaning by decreasing catheter P-level in 2-level steps at intervals of several minutes
(for example, P-6 to P-4 to P-2). Do NOT decrease P-level to below P-2 until just before removing the
catheter from the ventricle.
2. When the P-level has been reduced to P-2, maintain the patient on P-2 support for at least 10 minutes
before discontinuing circulatory support.
3.
If the patient's hemodynamics remain stable, decrease the P-level to P-1, pull the catheter into the aorta,
and stop the motor by decreasing the P-level to P-0.
4.
Explant the catheter.
5. Follow institutional guidelines for arterial closure.
6.
Disconnect the connector cable from the Automated Impella
pressing the power switch on the side of the controller for 3 seconds.
SLOW WEANING
1.
Initiate slow weaning by decreasing catheter P-level in 2-level steps over time as cardiac function allows
(for example, P-6 to P-4 to P-2). Do NOT decrease P-level to below P-2 until just before removing the
catheter from the ventricle.
2. When the P-level has been reduced to P-2, maintain the patient on P-2 support until the patient's
hemodynamics remain stable before discontinuing circulatory support.
3. If the patient's hemodynamics remain stable, decrease the P-level to P-1, pull the catheter into the aorta,
and stop the motor by decreasing the P-level to P-0.
4. Explant the catheter.
5.
Follow institutional guidelines for arterial closure.
6.
Disconnect the connector cable from the Automated Impella
pressing the power switch on the side of the controller for 3 seconds.
PRESSURE SENSOR DRIFT AND PLACEMENT SIGNAL NOT
RELIABLE
Sensor Drift and Effects on Flow
The electrical signal produced by the differential pressure sensor may drift over time. This drifting is normal behavior
and is characterized by an upward or downward shift in the placement signal on the controller display. The amplitude
(peak-to-trough, or maximum to minimum) of the waveform will not change. In addition, when sensor drifting occurs,
the displayed flow rate may not match the P-level.
P-Level
P-0
P-1
P-2
P-3
P-4
P-5
P-6
P-7
P-8
P-9
*Flow rate can vary due to suction or incorrect positioning.
Impella ® 5.0 Circulatory Support System
5.0 Catheter is at the discretion of the physician.
®
® Controller and turn the controller off by
® Controller and turn the controller off by
*Flow Rate (L/min)
0.0 – 0.0
0.0 – 1.4
0.5 – 2.6
0.5 – 3.1
0.9 – 3.4
1.4 – 3.7
1.8 – 4.0
2.6 – 4.4
3.4 – 4.7
4.2 – 5.3
Remove the Impella 5.0
®
Catheter With Care
Removal of the Impella 5.0
®
Catheter must be completed
with care to avoid damage to the
catheter assembly.
Accuracy of Displayed Flow
Rate
Under normal operating
conditions, displayed flow rate
can deviate from the actual flow
rate by up to 0.5 L/min.
Zeroing the Differential
Pressure Sensor When the
Impella ® 5.0 Catheter is
Running
The controller software contains
a data table listing the expected
differential pressure for a given
motor current when the motor
speed is set to a specific value.
To zero the differential pressure
sensor while the Impella ® 5.0
Catheter is running, the software
sets the motor speed and
measures the motor current.
Using the data table, the software
determines what the measured
differential pressure should be,
then adjusts the signal from the
differential pressure sensor so
that it matches the expected
value.
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