Download Chapter 6 - Boone County Schools

Chapter 6
AED
Public Access Defibrillation
• Sudden cardiac death is an unresolved
health crisis.
• CPR and defibrillation improve chance
for survival.
• Automated external defibrillators (AEDs)
must be used in first few minutes
following cardiac arrest.
• Public access defibrillation (PAD) laws
have helped make AEDs available.
The Chain of Survival
•
•
•
•
Early access
Early CPR
Early defibrillation
Early advanced care
How the Heart Works
• The heart is a
muscle.
• Four chambers
coordinate blood
flow
• Pacemaker cells
emit electrical
impulses; heart
muscle contracts
When Normal Electrical
Activity Is Interrupted (1 of 2)
• Ventricular fibrillation (V-fib)
• Most common abnormal heart rhythm in
cases of sudden cardiac arrest in adults
• Chaotic electrical activity that causes loss
of circulation
When Normal Electrical
Activity Is Interrupted (2 of 2)
• Ventricular tachycardia (V-tach)
• Very rapid electrical activity
• Heart may be unable to pump blood
effectively
Care for Cardiac Arrest
• CPR must be started until defibrillator
is available.
• V-fib and V-tach can be corrected with
defibrillation, but time is critical.
• For every minute that defibrillation is
delayed, victim’s chance for survival
decreases by 7% to 10%.
• CPR is initial care until defibrillator is
available.
About AEDs (1 of 2)
• Electronic device that:
• Analyzes the heart rhythm
• Determines and advises need to
shock
• Delivers electrical shock to the victim
in cardiac arrest
• Reestablishes a heart rhythm that will
generate a pulse
About AEDs (2 of 2)
• Common elements
• On/off button
• Cable and pads (electrodes)
• Analysis capability
• Defibrillation capability
• Prompts to guide you
• Battery operation for portability
Using an AED (1 of 2)
• Turn the unit on.
• Apply AED pads
to bare chest and
the cable to the
AED.
Using an AED (2 of 2)
•
•
•
•
Stand clear and analyze the heart rhythm.
Deliver a shock if indicated.
Perform CPR for 2 minutes (five cycles).
Check victim and repeat analysis, shock, and
CPR steps as needed.
Special Considerations (1 of 2)
• Water
• Remove victim
from water
• Dry victim’s chest
• Children
• Medication patches
• Remove patches
and wipe skin
Special Considerations (2 of 2)
• Implanted devices
• Pacemakers
and
defibrillators
• Avoid placing
electrode pads
over devices.
AED Maintenance
• Preventive maintenance checks are
recommended by manufacturers.
• The AED will automatically perform
periodic self-tests, but it should be
checked daily to ensure proper
operation.
• Check expiration and replacement
dates on electrode pads and
batteries.