Abiomed Impella 2.5, Instructions For Use Manual

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4.11 Impella
®
System for Use During Cardiogenic Shock
PURGE FLOW
The purge flow rate delivered by the purge cassette is displayed in mL/hr. The standard scale for
the purge flow (0–30 mL/hr) is displayed to the left of the purge flow plot. The maximum value
on this scale can be adjusted from 20 mL/hr to 200 mL/hr in increments of 10 mL/hr.
To the right of the plot is a display that labels the plot and shows the most recent value update.
You can set the time scale at the bottom of the window by pressing the
DISPLAY
soft button.
A purge flow change notification can be enabled to indicate when the purge flow rate increases
or decreases by 2.5 mL/h. The message is intended to aid patient management by alerting the
clinician to changes in the rates of dextrose and heparin infusion through the purge fluid. The
alarm clears when you press the
MUTE ALARM
button. This alarm is disabled by default. To
enable this alarm, press
MENU
, select Settings/Service, and select Enable Purge Flow Change
Notification.
PURGE PRESSURE
The Automated Impella
®
Controller regulates purge pressure, the pressure of the purge fluid
delivered through the catheter to the motor. The purge pressure generated by the purge cassette
is displayed in mmHg. The standard scale for the purge pressure (0–1500 mmHg) is displayed to
the left of the purge pressure plot. The maximum value on this scale can be adjusted from
100 mmHg to 2000 mmHg in increments of 100 mmHg. An alarm appears if purge pressure falls
below 300 mmHg or exceeds 1100 mmHg.
To the right of the plot is a display that labels the plot and shows the most recent value update.
You can set the time scale at the bottom of the window by pressing the
DISPLAY soft button.
INFUSION HISTORY SCREEN
The infusion history screen displays the infusion volume as well as the amount of heparin and
dextrose infused each hour. The current time period is displayed at the top of the list.
Use the DISPLAY soft button to navigate to the infusion history screen.
Figure 4.6 shows a sample infusion history screen.
Purge Flow
In the initial set-up
configuration of the
Impella
®
System, purge
flow is regulated to keep
the purge pressure at 600
mmHg, although it may not
reach 600 mmHg in low
resistance catheters in this
configuration.
In the standard configuration,
purge flow can range from
2 to 30 mL/hr and purge
pressure can range from 300
to 1100 mmHg.
Purge Pressure Depends
on System Configuration
When in the initial set-up
configuration, the purge
pressure is set to 600 mmHg
with flows between 2 and 30
mL/hr. After switching to the
standard configuration, the
purge pressure is set to an
ideal pressure between 300
and 1100 mmHg and flows
between 2 and 30 mL/hr.
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