Servo Mode - Terumo Advanced Perfusion System 1 Operator's Manual

Centrifugal Control Unit
To End Pulse Mode:
Use one of the following options:
Press the Manual button on the control panel and the pump will transition to
•
Continuous mode at the midpoint between the Peak and Base speeds. The
message "MANUAL: MONITOR FLOW" appears in the front panel message
area.
• Open the Pulse subtab within the Primary Pump tab on the CCM, touch the
Manual button, and the pump will transition to Continuous mode at the midpoint
between the Peak and Base speeds.
• Open the Pulse subtab within the Primary Pump tab on the CCM. Slowly
increase the Base setting to 100%. Note that although the flow will be
continuous, the pump still operates in Pulse mode.
Note: If the centrifugal pump stops or goes to Coast speed, this will also end Pulse
mode.

Servo Mode

In Servo mode, the pump speed is automatically regulated to maintain a specific
user selected pressure or flow setpoint. Pressure or flow servo sources are chosen
using the Configuration area on the CCM. The servo source should be located
at least 12 inches (30,5 cm) downstream of the pump operating in Servo mode.
The location of the servo source sensor in the perfusion circuit can affect servo
performance. Proper placement of the sensor is ultimately up to the medical
professional. The setpoint must be in the correct operating range before Servo
mode can be initiated. The centrifugal pump must be above 1550 RPM to initiate
Servo mode.
While operating in Servo mode, the pump speed can vary within certain limits to
maintain the servo setpoint. The servo speed has a lower speed limit of 1500
RPM and an upper speed limit not to exceed the greater of 125% of the speed at
which servo mode was entered or 500 RPM over the speed at which servo mode
was entered. If the servo reaches either limit, the speed remains at the limit unless
required to change by the servo source or user input. The automatic slowing to 1500
RPM to maintain the servo setpoint will not generate a Coast event nor a Coast
response.
Monitor the pump speed closely while in Servo mode, as reduced pump speed may
result in hypoperfusion of the patient.
Operating Parameters
The centrifugal pump must be above 1550 RPM to initiate Servo mode.
Flow Servo
Recommended Setpoint
Pump Type Min L/min
Centrifugal 4
Pressure Servo – Positive
Recommended Setpoint
Pump Type Min mmHg
Centrifugal 150
Pressure Servo – Negative
Recommended Setpoint
Pump Type Min mmHg
Centrifugal -100
Max L/min
6
Recommended Flow
Max mmHg Min L/min Max L/min
200 4
Recommended Flow
Max mmHg Min L/min Max L/min
-50 4
6-13
Servo Operating Range
Min L/min Max L/min
1 7
Servo Operating Range
Min mmHg Max mmHg
6 10 400
Servo Operating Range
Min mmHg Max mmHg
6 -200 -10