Terumo 801763, Operator'S Manual, Page: 281 / 359

Emergency Procedures
10-2
Air Detection Stops a Centrifugal Pump
When an Air Bubble Detector stops the centrifugal pump, clamp both the arterial and
venous lines. Remove any air from the arterial line before resetting the air detection
and restarting the pump.
Air Detection Causes a Centrifugal Pump to Coast
When an Air Bubble Detector causes the centrifugal pump to go to Coast speed,
clamp both the arterial and venous lines. Remove any air from the arterial line before
resetting the air detection and increasing the pump speed.
Pressure display of ‘999’ or ‘– – –’
In the event of a pressure transducer failure and a pressure display of 999 or --- the
following should be considered in order to re-engage pressure measurement.
If 999 or --- is displayed prior to cardiopulmonary bypass:
•
Verify the circuit pressure is not actually elevated or dropped to out of range levels.
• Check transducer connections.
• Attempt to re-zero the pressure transducer by opening to atmospheric pressure
and recalibrating.
• Connect a backup pressure transducer.
• If a backup pressure transducer is not available, consider use of a stand-alone
pressure device. Keep in mind, this will not allow for pressure-related safety con-
nections.
If 999 or --- is displayed during cardiopulmonary bypass:
•
Verify the circuit pressure is not actually elevated or dropped to out of range levels.
• Check transducer connections.
• If troubleshooting is delayed, consider hand cranking any stopped pumps.
• Attempt to re-zero the pressure transducer by opening to atmospheric pressure
and recalibrating.
• The physiological alerts or alarms will be cleared automatically. If a safety connec-
tion from a pressure event paused or stopped a pump, that pump can resume or
be restarted (if no other pause or stop responses are in effect).
• After pump restart, consider the use of a backup pressure transducer.
• If a backup pressure transducer is not available, consider use of a stand-alone
CAUTION:
The pressure safety connection response described above is
applicable even in a loss of Central Control Monitor situation. With pres-
sure monitoring capability lost, safety connections may still be functional and
may cause responses if pressure readings are in range and the pressure
related safety messages may also appear in the message area on the pump
control panel. If the behavior of the pressure transducer appears erratic or
as a preventive measure, discontinue use of integrated pressure monitoring
by disconnecting pressure transducers from the module. Consider use of a
stand-alone pressure monitoring device. Keep in mind that this will not allow
for pressure-related safety connections.