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Appendix
Reference
Guides
Alarms and
Emergencies
Patient
Management
Surgical
Implant and
Explant
Monitor
Peripherals
and
Accessories
HVAD
®
Pump Overview
Introduction
60 HVAD® Instructions for Use
3.2 Physiologic Control Algorithms (continued)
3.2.2 [Ventricular Suction Detection] Alarm
ventricle than is available, resulting in considerable reduction in ventricular volume. Left ventricular
collapse can be the result of clinical events affecting left ventricular preload, including hypovolemia
occur as a result of surgical positioning, patient position or during straining (valsalva).
triggered if this condition is maintained for 10 seconds.
(Figure 34) This is an
indication that the suction condition has cleared.
The [Ventricular Suction Detection] alarm can only be activated from the System Screen of the
monitor. Therefore, only the clinician has access to control the state of this alarm. The default
setting for Suction Response is off. In this mode, there will be no alarm during a ventricular suction
condition. An “Sx Off” message will be displayed on the lower left-hand corner of the monitor
screen below the “Fixed” mode display. When Suction Response is enabled (via the “Alarm”
button), the “Sx On” message will be displayed on the lower left-hand corner of the monitor
screen below the “Fixed” mode display.
For additional information on the monitor, see Section 5.0.
Figure 34
NOTE: Whether or not the [Ventricular Suction Detection] alarm is enabled (“Sx On”) or is off (“Sx Off”)
can only be determined with the monitor; it cannot be determined from the controller.
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