LVAD Guide - Algorithm

What can affect the ability to successfully change LVAD system controllers?

Native cardiac output, cognitive function, and other factors.

How often should the ability to change LVAD controllers be reassessed?

Periodically, since it may change over the course of LVAD support.

Where is the backup system controller placed during setup?

Within reach.

What position should the patient be in for a controller change?

Sitting or lying down.

Why does the patient sit or lie down for a controller change?

They may get dizzy if the pump briefly stops.

What is unlocked on the running controller during setup?

The driveline safety tab.

What must stay connected to power during a controller change?

The running system controller.

What is connected to power on the backup controller?

Both the white and black connectors.

What is moved from the running controller to the backup?

The driveline, promptly.

What confirms the backup controller is running the pump?

The green pump running symbol is illuminated.

What is exposed first to connect the driveline?

The red button, after unlocking.

What is aligned when connecting the driveline?

The driveline arrow/alignment mark with the arrow on the controller.

How far is the driveline inserted?

Firmly until it snaps into place.

What is slid over the red button after inserting the driveline?

The safety tab.

What does it mean if the safety tab won't slide fully over the red button?

The driveline is not connected.

What do you do if the safety tab won't slide fully over the red button?

Disconnect the driveline and reconnect it.

What mode is the old controller put into?

Sleep Mode.

How is the old controller put into Sleep Mode?

Disconnect it from power, then press and hold the battery button for 5 seconds.

Can the old replaced controller be used again?

No, never.

Who do you contact for a new backup controller and return instructions?

Thoratec Corporation.

What do you check first if the LVAD pump has stopped?

The connections between the controller, the pump perc lead, and the power source.

What power sources are checked when the pump stops?

Batteries, PBU, or Emergency Power Pak.

What do you fix to restart a stopped pump?

Any loose connections.

What is done if the pump does not restart on batteries?

Replace the current batteries with a new, fully-charged pair.

How is the first battery removed?

Press the battery release button on the 1st battery clip and remove the battery.

How is a new battery inserted into the clip?

Slide it in by aligning the black arrows until it clicks.

What is done after the first battery is replaced?

Repeat with the 2nd battery and clip.

How many power leads must be connected at all times?

At least one.

What happens if both batteries are removed at the same time?

The pump will stop.

Who do you talk to for detailed emergency instructions?

The patient's hospital contact person.

Where is the hospital contact information found?

On the patient's emergency contact card.

Should the perc lead be disconnected for defibrillation/cardioversion?

No.

Should the pump be stopped before delivering a shock?

No.