BLS AED Algorithm
All AEDs are similar. To operate an AED, refer to the AED algorithm.
- Secure the scene and verify the victim is NOT in water.
- Open and turn the AED on.
- Stop CPR. The effectiveness of shock delivery decreases significantly for every 10 seconds that elapses between compressions and shock delivery, so it is critical to deliver a shock quickly.
- Expose the victim’s chest and dry the skin if necessary.
- Open the AED pads and attach the pads to the victim’s chest. A hard lump on the victim’s chest may indicate an implanted pacemaker. Do not place an AED pad over the lump. Remove any medication patch that is on the chest.
- Instruct all bystanders to move away while the AED analyzes the victim’s rhythm. DO NOT TOUCH the victim during this analysis. If you get a message to check the pads, press on each pad to ensure the pads are making full contact. Occasionally, you may have to apply a new set of pads.
- If the AED detects a shockable rhythm, it will verbally tell you to not touch the victim. The AED will advise you to deliver a shock. Ensure that no one is in contact with the victim. Press the Shock button.
- If the AED does NOT detect a shockable rhythm, it will tell you to resume CPR.
- After performing CPR for 2 minutes, the AED will advise you to stop CPR and will analyze the rhythm again.
- Repeat step 8 or 9 as advised by the AED.