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Shock related voice prompts:
“Charging” – This indicates that the DDU-120 AED has determined that a shock is recommended and
is charging the unit in anticipation of a defibrillation shock. Analysis will continue during this phase and
the “analyzing” LED will continue to flash green. A tone will sound to indicate charging progress. If the
unit detects a rhythm change to a non-shockable one, charging will abort and the user will be prompted to
begin CPR, if needed, for a period of two minutes.
“Stand clear” – This prompt is spoken when the DDU-120 AED begins charging and is also spoken
when the AED is ready to deliver a shock. The operator and others should stand clear of the patient.
Analysis will continue during this phase and the “analyzing” LED will continue to flash green. A tone will
sound to indicate charging progress. If the unit detects a rhythm change to a non-shockable one, charging
will abort and the user will be prompted to begin CPR, if needed, for a period of two minutes.
“Shock advised” – This indicates that the DDU-120 AED is about to deliver the shock. Stand clear of
the patient.
“ Three…two…one” – This indicates that the DDU-120 AED has fully charged, that the heart rhythm
analysis algorithm still indicates a shock is recommended, and the unit is about to deliver a shock. The shock
will automatically be delivered after the count reaches “One.” Do not touch the patient during this time.
auto
Shock
Required
Indicator
• Not Flashing: A shock is not yet ready to be delivered. This
indicator will not be flashing during most phases of the rescue.
• Flashing: The device is charged and ready to shock. Shock is
about to be delivered. DO NOT touch the patient.
“Shock ‘x’ delivered” – This indicates that the DDU-120 AED has delivered the shock. The ‘x’ indicates
the number of shocks that have been delivered since the unit was turned on (note: if the unit delivers more
than 15 shocks during one on period, the count will get reset to “one” on the sixteenth shock). After each
shock, the AED will enter Post-Shock CPR mode (see below).
“Shock cancelled” – This indicates that the DDU-120 AED has aborted shock mode and has internally
discharged.
Note: At any time during the charging process or after the AED has been charged, the operator may
disarm the unit by pressing the ON/OFF button.
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