Table 4 Automated Impella
Severity
Alarm Header
Impella Stopped
Controller Failure
Impella Stopped
Motor Current High
Impella Stopped
Retrograde Flow
Purge Disc Not Detected Re-insert purge disc.
Purge Pressure High
Purge Pressure Low
Purge System Blocked
Purge System Failure
Purge System Open
Retrograde Flow
Battery Comm. Failure
Battery Level Low
Battery Temperature
High
Impella RP
®
with the Automated Impella
Controller Alarm Messages (continued)
®
Action
Switch to backup controller.
1. Restart Impella.
2. Replace Impella after 3rd
unsuccessful restart attempt.
To prevent retrograde flow, restart
Impella or withdraw pump from ventricle.
1. Check purge system tubing for kinks.
2. Decrease concentration of dextrose in
the purge solution.
1. Check purge system tubing for leaks.
2. Increase concentration of dextrose in
the purge solution.
3. Replace purge cassette.
1. Check all purge system tubing for
kinks or blockages.
2. Decrease concentration of dextrose in
the purge solution.
1. Replace purge cassette.
2. Switch to backup controller.
1. Check the purge system tubing for
open connections or leaks.
2. Replace purge cassette.
Check for high afterload pressure.
Plug controller into AC power.
Plug controller into AC power.
1. Check controller for blocked air vents.
2. Switch to backup controller.
®
Controller
Cause
There is a problem with the controller
electronics.
There is a problem with the
Impella RP
®
Catheter Motor
Impella RP
Catheter is not running;
®
possible retrograde flow through
Impella RP
Catheter.
®
The controller is not detecting that
the purge disc is clicked into the front
of the controller.
Purge pressure is ≥1100 mmHg with
the purge flow <2 mL/hr.
Purge pressure has dropped below
300 mmHg with the purge flow
≥30 mL/hr for 30 seconds or longer.
Purge flow has dropped below
1 mL/hr.
Kinked or blocked purge connecting
tube.
Kinked or blocked purge lumen in
Impella RP
®
Catheter.
There is a problem with the purger
unit driver.
Purge pressure has dropped below
100 mmHg for 20 seconds or longer.
Reverse flow detected at high motor
speed.
Loss of communication to the
battery.
Battery power has 50% remaining
capacity.
Battery temperature is greater than
50°C and less than or equal to 60°C.
23