Terumo 801763, Operator'S Manual, Page: 285 / 359

Emergency Procedures
10-6
Centrifugal Pump Decouples from the Drive Motor
Decoupling of the pump from the motor is noted by a drop in flow and may be
accompanied by a loud “whirring” or “buzzing” noise. Clamp the arterial and venous
lines and stop the pump. After a complete stop, remove any air that may have
resulted from retrograde flow and restart the drive motor at a reduced speed. If
the coupling cannot be accomplished or the desired flow cannot be achieved, use
standby equipment. Contact Terumo Cardiovascular Systems and do not use the
drive motor until it is serviced.
Stopped Drive Motor with the Centrifugal Control Unit
In the event of a stopped drive motor with the Centrifugal Control Unit, the user
should:
Clamp the arterial and venous lines
• Discontinue vacuum-assisted venous drainage, if applicable.
• Close all purge and recirculation lines to minimize the potential for air
entrainment and backflow in the CPB circuit.
• If necessary, stop the cardioplegia pump to minimize the potential for air
entrainment.
• Resume arterial flow using backup equipment, either a manual drive unit or
roller pump, according to hospital protocol.
• For additional information regarding Centrifugal Control Unit issues, see
Centrifugal Control Unit
chapter.
Loss of Local Display (roller pump or centrifugal control unit)
A failure of the local display may exhibit any or all of these symptoms: blank display,
distorted display, flickering display, vertical line through display, or spot on display.
• If this occurs while not on bypass, replace and re-assign the pump with
backup equipment.
• If this occurs while on bypass, attempt to finish the case referring to the pump
status information on the CCM.
WARNING:
If the local display fails, the pump information can be viewed from
the CCM. For any configured pump, the pump control box and associated slide
bar display pump name, pump direction (for roller pumps), speed/flow or set point
display, and display units. Safety messages are displayed on the CCM.
WARNING:
If the local display fails, the pump may still be operational and the
local controls may still function. Confirm the pump status using other indicators
before attempting to start/stop the pump or adjust speed. Pressing the Start/Stop
button could result in the unintentional stopping of a running pump.