Common AED Pad Placement Mistakes and Fixes
Posted by Sydney Pulse, APRN at 7:45 am 0 Comment Print
When sudden cardiac arrest strikes, proper AED pad placement can determine whether a victim survives. Research reveals that even trained professionals struggle with correct electrode positioning. Studies show that only 32% of laypeople place both AED electrodes within 5 cm of the recommended position. Understanding common AED pad placement mistakes and fixes empowers responders to deliver life-saving shocks effectively.
Why AED Pad Placement Matters
The electrical shock from an AED must travel directly through the heart muscle to restore normal rhythm. Improper pad placement creates resistance to current flow, also called transthoracic impedance. This resistance reduces shock effectiveness and decreases survival chances.
Every minute without defibrillation reduces survival rates by approximately 10 percent. Correct pad positioning maximizes the electrical current’s path through cardiac tissue, ensuring the best possible outcome during these critical moments.
Most Common AED Pad Placement Mistakes
Mistake 1: Incorrect Left Pad Position
The most frequent error involves placing the left apicolateral electrode too far forward on the chest. The left apicolateral AED electrode is often placed medially compared with the recommended position. This happens because rescuers typically work from the right side of the victim, making it difficult to reach the correct lateral position under the armpit.
The Fix: Position the left pad on the lower left chest wall, directly below the armpit along the mid-axillary line. The pad should sit several inches below the armpit, not on the front of the chest. Place yourself on the left side of the victim if possible to improve access to this location.
Mistake 2: Pads Placed Too Close Together
When electrodes are positioned too near each other, the electrical current takes a shorter path that bypasses the heart muscle. This occurs frequently with pediatric victims due to their smaller chest size, but adults also experience this problem when rescuers rush.
The Fix: Ensure adequate spacing between pads. One pad goes on the upper right chest below the collarbone, while the other sits on the lower left chest below the armpit. For small children, use anterior-posterior placement with one pad on the chest center and the other on the back between the shoulder blades.
Mistake 3: Failing to Prepare the Skin
Studies recommend that at least 80 N of force be applied when adhering pads to a victim. However, chest hair, moisture, or jewelry creates barriers that prevent proper adhesion and reduce shock effectiveness.
The Fix: Quickly remove any obstacles to pad contact. Dry wet skin with a towel. Use the razor included in most AED kits to shave excessive chest hair. Remove necklaces and other jewelry from the chest area. Press pads firmly to ensure complete skin contact.
Mistake 4: Incorrect Pediatric Pad Placement
Parents and caregivers often struggle with proper electrode positioning for children. Using adult pads on small children without adjusting placement leads to pad overlap, which diverts electrical current away from the heart.
The Fix: For pediatric defibrillation, use an anterior-posterior configuration with one electrode placed on the front chest wall and the other on the center of the child’s back. This prevents overlap and ensures safe shock delivery for children under 8 years or weighing less than 55 pounds.
Mistake 5: Avoiding Pacemakers Incorrectly
Victims with implanted cardiac devices require special consideration. Many rescuers place pads too close to pacemakers or avoid using the AED entirely, fearing device damage.
The Fix: Identify the pacemaker location by visual inspection or feeling for the device under the skin. Place AED pads at least one inch away from the implant. Use standard anterior-lateral placement if the pacemaker sits on the upper left chest. If the device is on the upper right, shift the right pad slightly down or to the side while maintaining proper spacing.
Mistake 6: Relying on Unclear Diagrams
In a study of 18 AED pad position diagrams, the majority failed to provide correct guidance on left apical defibrillation electrode placement, which was misplaced too anteriorly. Many rescuers depend solely on device illustrations, which often show inaccurate positioning.
The Fix: Seek comprehensive AED training before emergencies occur. Understand that diagrams provide general guidance, but proper placement requires knowing specific anatomical landmarks. The right pad belongs below the collarbone near the sternum. The left pad sits on the lower left chest in the mid-axillary line, aligned with the bottom of the chest muscle.
Mistake 7: Improper Placement of Female Victims
Confusion about breast tissue placement delays treatment and reduces effectiveness. Some rescuers hesitate or place pads on top of breast tissue instead of beneath it.
The Fix: For female victims, place the left pad under the breast, not on top of it. The pad must contact the skin directly. Act quickly and professionally—proper placement takes priority over modesty concerns during cardiac arrest. The electrical current must reach the heart muscle.
Understanding Correct AED Pad Placement Positions
The American Heart Association recommends two basic ways to position pads when treating adult victims: anterior-lateral and anterior-posterior.
Anterior-Lateral Placement (Standard): One pad on the upper right chest below the collarbone, the other on the lower left chest below the armpit. This configuration works for most adult victims and pregnant women.
Anterior-Posterior Placement (Alternative): One pad on the front over the cardiac apex, the other on the back just below the left shoulder blade at heart level. Use this position when anterior-lateral placement is impractical due to wounds, implants, or other obstacles.
Special Circumstances in AED Pad Placement
Pregnant Victims: Use standard adult pad placement. The electrical shock poses no harm to the fetus, and successful maternal resuscitation is the priority.
Wet Victims: Dry the chest quickly before applying pads. Water conducts electricity and can divert current away from the heart or cause skin burns.
Victims with Medication Patches: Remove any patches from the chest area before applying pads. Patches can block electrical current or cause burns.
Training Prevents AED Pad Placement Mistakes
Even with voice prompts and visual guides, AEDs cannot replace proper training. All current defibrillation pad diagrams fail to achieve relatively accurate defibrillation pad placement by untrained bystanders to such a significant extent that defibrillation efficacy is likely to be significantly impaired.
Hands-on practice with mannequins builds muscle memory and confidence. Training courses teach rescuers to recognize anatomical landmarks quickly and position pads accurately under stress.
Take Action: Get Certified Today
Understanding AED pad placement mistakes and fixes is just the beginning. True preparedness comes from hands-on training with experienced instructors. CPR Memphis, an American Heart Association training site, offers comprehensive certification courses that include detailed AED instruction.
Our stress-free, hands-on classes cover BLS for Healthcare Providers, ACLS, PALS, and CPR and First Aid. You’ll practice proper pad placement on training mannequins and learn to respond confidently during real emergencies. Whether you need CPR certification in Memphis or are looking for BLS classes in Memphis, our expert instructors ensure you master every critical skill.
Don’t wait until an emergency to discover you need more training. Visit CPR Memphis today and gain the knowledge that saves lives. Your community needs trained responders who can act quickly and correctly when every second counts.
