Terumo Advanced Perfusion System 1 Operator's Manual page 190

Roller Pumps
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 24
inches (61 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.
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 0 RPM and
an upper speed limit not to exceed the greater of 110% of the speed at which servo
mode was entered or 3 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. Monitor the pump speed closely while in Servo
mode as reduced pump speed may result in hypoperfusion of the patient. If the servo
source is a flowmeter, the flow displayed on the pump control panel is the measured
value from the flow sensor.
Arterial
Select Servo Source:
Summary
Servo
ART Flow
ART Pres
Pulse
Operating Parameters
Flow Servo
Recommended Setpoint
Pump Type Min L/min
Small 2
Large 2
Pressure Servo (3/8 in. (9,5 mm) and 1/4 in. (6,4 mm) tube sizes)*
Recommended Setpoint
Min mmHg
Small 150
Large 150
*Pressure servo is not recommended for use with 1/2 inch (12,7 mm) tube size.
Circuit and clinical parameters, including setpoint value and pump flow rate, should
be stabilized in Continuous mode and be within normal operating ranges before
initiating Servo mode.
Setpoint:
4.5 L/min
Max L/min
3
5.5
Recommended Flow
Max mmHg Min L/min Max L/min
200 2
200 4
5-23
16:07:51
Servo Control:
Auto Manual
Servo Operating Range
Min L/min Max L/min
1 4
1 7
Servo Operating Range
Min mmHg Max mmHg
3 10 400
6 10 400