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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