Defibtech DDU-120 Series - Manual (Page 30)

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not sticking due to excessive hair, shave or clip excessive chest hair. If the prompts continue, try
replacing the pads with a new set. The “check pads” LED will flash red during this message.
“Replace pads” – This indicates that the pads are not making proper contact with the patient
and that the impedance is out of range for proper ECG analysis and shock delivery. If another set
of pads is available, replace the pads, otherwise check that the pads are properly placed and fully
adhering to the patient. Make sure that the pads are not touching each other. If the pads are not
sticking due to moisture, dry the patient. If the pads are not sticking due to excessive hair, shave
or clip excessive chest hair. If the prompts continue, try replacing the pads with a new set. The
“check pads” LED will flash red during this message.
“Check pads” – This indicates that the pads are making improper contact with the patient or
touching each other and that the impedance is out of range for proper ECG analysis and shock delivery.
Check that the pads are not touching each other and that the patient is dry. If the prompts continue, try
replacing the pads with a new set. The “check pads” LED will flash red during this message.
“Pausing for CPR” – This indicates that the user should stop attempting to resolve problems with
the pads and assess the condition of the patient. The user will be prompted to begin CPR, if needed,
for a two-minute period.
Motion/Interference related voice prompts:
“Stop motion” – This indicates that the DDU-120 AED has detected motion in the patient. Stop all
patient motion, including CPR, in response to this message. If the patient is being transported, stop
the vehicle to stop the motion. The “do not touch patient” LED will flash red during this message.
“Stop interference” – This indicates that the DDU-120 AED has detected interference on the ECG
signal. Eliminate any radio or electrical sources of interference. Check the pads to make sure they are
adhering properly to the patient. If the environment is very dry, minimize movement around the patient
to reduce static discharges. The “do not touch patient” LED will flash red during this message.
“Pausing for CPR” – This indicates that the user should stop attempting to resolve motion and/or
interference problems and assess the condition of the patient. The user will be prompted to begin CPR,
if needed, for a two-minute period.
4.5 Heart Rhythm Analysis
Once the DDU-120 AED has determined that the pads are making a good connection to the patient,
the AED will start the ECG rhythm analysis. The unit analyzes the ECG signal and determines whether
a shockable or non-shockable rhythm is present. While analyzing, the AED will continue to monitor the
pad connections and will abort analysis if it detects any pad problems. It will also continue to monitor
for excessive motion or interference and will abort analysis if those conditions are detected.