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Table 3 Technical problems and the needed measures performed at the same or different occasion

From: Controller and battery changes due to technical problems related to the HVAD® left ventricular assist device - a single center experience

Technical problem

Number of events (n = 41)

Controller exchange

(n = 45)

Batteries change

(n = 128)

Beeping without reason

7

18

82

Security message

10

9

5

Sudden change in charge capacity of a battery

3

1

5

Red alarm (black display)

3

3

1

The controller switches back and forth between batteries

3

2

8

Red flashing in battery charger

3

0

7

Critical battery

1

0

3

HVAD stopped suddenly

2

3

1

Electrical fault

2

1

0

Other reasons: loose connection, damage, no communication to monitor

7

8

16