59HeartWare™ HVAD™ System Pump
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Appendix
Reference
Guides
Alarms and
Emergencies
Patient
Management
Surgical
Implant and
Explant
Monitor
Peripherals
and
Accessories
HVAD
®
PumpOverviewIntroduction
NOTE: Update hematocrit settings on the monitor whenever hematocrit changes by plus or minus 5%
or more.
Monitor and Controller Display Estimated Flow Range
“--“ Invalid, not available
“< -2.0 L/min“ less than -2.0 L/min
“-2.0 L/min” up to “10.0 L/min” -2.0 to 10.0 L/min
greater than 10.0 L/min
NOTE:
to variability of patient’s hematocrit.
3.2 Physiologic Control Algorithms
The HVAD
®
Pump control algorithms provide clinicians information about device performance
and HVAD
®
3.2.1 Flow Estimation
Estimated HVAD
®
hematocrit, based on a blood sample from the patient. The default hematocrit setting is 30%,
Adjustments to the hematocrit setting on the monitor should be made for hematocrit changes
of ± 5% or greater.
Controller Display messages and what they mean.
Table 22: Monitor and Controller Display Messages
Flow estimation accuracy can be maintained only if accurate hematocrit values are entered.
to thrombus or other materials (e.g. tissue fragments) in the device, due to an incorrect
WARNING!
on the monitor or Controller Display of less than 2.0 L/min, or greater than 10.0 L/min may indicate an
electrical fault, incorrect hematocrit entry or an occlusion and/or thrombus or other materials (e.g. tissue
fragments) in the device. Inaccurate assessment of HVAD
®
treatment.
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