Pump Evaluation
Î Device parameters such as power, speed, flow, and pulsatility should be
recorded throughout the patient's course.
Table 4. Normal Parameters
RPM Power, W Flow, L/min Pulsatility
HeartMate II 8000–10 000 5.0–8.0 4.0–7.0 5.0–8.0
HeartWare
Ventricular Assist
Device
2400–3200 3.0–7.0 3.5–7.0
Î If battery power is low, either the batteries should be replaced or the
configuration should be changed to wall power.
Î When power source is confirmed but there is a persistent device alarm,
the controller should be exchanged for the backup controller.
Î If thrombus is suspected, assessment for hemolysis, including lactate
dehydrogenase, is recommended.
