What Are Special Considerations When Using an AED?

Grabbing an AED to save a life is a brave act, but it’s natural to feel a surge of uncertainty. That feeling can intensify when the situation isn’t by the book. A medication patch, a metal surface, or even a pacemaker can create unexpected hurdles. Knowing how to handle these moments is the key to turning hesitation into decisive action. Understanding what are some of the special considerations when using an AED builds the confidence you need to respond correctly. We’ll cover these specific situations and provide clear, actionable steps so you’re prepared for anything.

• Pediatric patients
• Wet or sweaty patients
• Patients lying on snow or ice, or near flammable or combustible materials.
• Patients with a hairy chest
• Patients with a medication patch.
• Patients with a pacemaker or an implantable cardioverter defibrillator
• Patients with jewelry or body piercings.
• Patients who are wearing a bra.
• Patients who are pregnant.

In a cardiac emergency, if you’re not sure what to do, begin chest compressions immediately. Then, ask someone nearby to call emergency services for help before using an AED. If the person is unconscious and not breathing, act fast. Quick action can greatly increase the chances of survival, no matter the situation.

General AED Usage and Safety Instructions

While modern AEDs are designed to be user-friendly, knowing the fundamental safety steps is non-negotiable. Following these core instructions ensures the device works effectively and keeps everyone, including the rescuer, safe. Think of these as the universal rules of AED use that apply in almost every scenario, giving you a clear framework to act confidently when seconds count. Mastering these basics is the first step toward being truly prepared for a cardiac emergency.

Proper AED Pad Placement on Adults

Correct pad placement is critical for the AED to deliver a life-saving shock. The goal is to create a direct electrical path through the heart, allowing the device to analyze the rhythm and treat sudden cardiac arrest. For an adult, you’ll place one pad on the upper right side of their bare chest, just below the collarbone. The second pad goes on the lower left side of their chest, a few inches below the armpit. Most AED pads include clear diagrams to guide you, so take a moment to look at them. Applying the pads correctly ensures the heart receives the full, intended shock, which can be the difference between life and death.

Giving the “All Clear” Before a Shock

Before the AED delivers a shock, you must ensure no one is touching the person. The device will prompt you, but it’s your job to be the final safety check. State loudly and clearly, “Everyone clear!” and perform a quick visual scan to confirm that you and any other bystanders are not in physical contact with the individual. This step is crucial because the electrical shock can be transferred to anyone touching the person, potentially causing injury or even a second cardiac event. Safety for the rescuer and the team is just as important as helping the patient, a principle we emphasize in all our onsite group training sessions.

Familiarize Yourself with Your AED Before an Emergency

The middle of an emergency is the worst time to learn how your AED works. Being familiar with your specific device beforehand saves precious seconds. Know where the pads are stored, how to turn the machine on, and what the voice prompts sound like. Regularly check the device’s readiness indicator to ensure the battery is charged and the pads are within their expiration date. The best way to build this confidence is through hands-on CPR and AED certification, where you can practice with training units. Proper maintenance and readiness are also key, which is why many organizations use an AED program management service to track supplies and ensure compliance.

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How to Safely Use an AED on Infants and Children

Cardiac arrest can happen in children, though it’s rare. Some AEDs are made to manage these situations safely. Many devices have a pediatric mode. They also have child electrode pads. These pads reduce the shock level for young patients, usually those under eight. This lower energy setting makes the treatment safer for smaller, more vulnerable bodies.

When using an AED on a child under eight, set the device to pediatric mode. If it doesn’t have this option, use child-specific electrode pads. This ensures a lower shock that’s safe for their age and size.

• Zoll AED Plus. Replace the adult pads with ZOLL Pedi Padz II (sold separately). The device will then adjust its voice prompts for pediatric use.
• Defibtech Lifeline AED. This defibrillator supports pediatric patients with pads available separately. When needed, unplug the adult pads and plug in the pediatric ones. The device will switch to pediatric mode by itself.
• Philips HeartStart FRx. Insert the infant or child key, sold separately, to lower the shock level. You can still use the standard adult electrode pads.
• Physio-Control Lifepak CR2. Turn on Child Mode to change the shock level for kids. You can still use the same electrode pads meant for adults.
• HeartSine Samaritan PAD 350P, 360P, and 450P. To switch to pediatric use, first disconnect the adult Pad-Pak. Then, connect the child electrode pads. These pads are sold separately. For the semi-automatic 350P and 450P models, listen to the voice instructions. Press the shock button when it tells you to.

If you don’t have child pads or a pediatric setting available, you can still use adult pads. For kids, pad placement is key. One pad should go in the center of the chest, left of the sternum. The other pad goes on the upper back. This positioning helps ensure the pads don’t overlap during use.

For infants under 12 months, use a manual defibrillator. This is especially important if pediatric pads are not available. Using an automated defibrillator with any pad type is much better than doing nothing.

Using Pediatric Pads for Children Under 55 lbs

When a child under 55 pounds or roughly eight years old experiences sudden cardiac arrest, the response needs to be adjusted for their smaller size. Standard adult AED pads deliver a shock that can be too powerful for a child’s body, which is why many modern AEDs have special pediatric settings or child-specific electrode pads. These tools reduce the shock’s energy to a safe and effective level. If you only have adult pads, don’t hesitate—it’s always better to act than to do nothing. You can safely use adult pads on a child by adjusting the placement to prevent them from touching. Place one pad in the center of the child’s chest and the other on their back, between the shoulder blades. This front-and-back placement ensures the electrical current travels through the heart correctly without the pads overlapping.

Can You Use an AED on a Wet or Sweaty Person?

If the patient is wet or sweaty, move them to a dry spot. Then, dry their chest before putting on the AED pads. AHA guidelines say to dry the chest only. So, don’t delay treatment by drying the whole body.

Keeping the chest dry is essential. It allows the shock to reach the heart in the correct manner. This also prevents the shock from transferring through water to others nearby. If the person is on a wet surface but their chest is dry, move them from the water and proceed with normal AED use.

Removing Wet Clothing and Drying the Chest

When you find someone in cardiac arrest who is wet from rain, sweat, or being in water, your first move is to get them to a drier spot if you can. Before applying the AED pads, you need to expose their bare chest. Use the trauma shears often included in an AED response kit to quickly cut away any wet clothing. Next, grab a towel, a piece of clothing, or anything absorbent and wipe their chest dry. The goal is to create a clean, dry surface so the electrode pads make solid contact with the skin. Don’t waste precious time trying to dry the person’s entire body; American Heart Association guidelines confirm that only the chest area needs to be dry for the AED to work properly.

Keeping the AED Device Dry

Water and electricity don’t mix, which is a common concern during a rescue in wet conditions. A wet surface can carry electrical shock away from the heart. This makes it less effective and poses a safety risk to you and nearby bystanders. While you dry the person’s chest, also make sure the spot where you place the AED machine itself is dry. If it’s raining, ask someone to shield the person and the device with a jacket or umbrella. You can use the AED machine safely, even if the person is lying on damp grass. make sure their chest is completely dry. The key is to ensure there is no water creating a path between the two electrode pads or from the person to a rescuer.

What About Using an AED on Metal or in Snow?

There are also specific concerns to keep in mind when using an AED near water:

• It is safe to use an AED if the patient is lying on snow or ice [2[mfn]ahajournals.org[/mfn]].
• Make sure there’s no metal surface linking the patient to the person using the AED, as this could pose a safety risk.
• Don’t use an AED where there are flammable vapors, like gasoline or aviation fumes. A small spark can start a fire.

Ensuring Pads Don’t Touch Metal Surfaces

When you’re ready to use an AED, take a quick look at your surroundings. If the person is on a metal surface, like bleachers or a metal floor, it’s important to move them before applying the pads. Metal conducts electricity, and if the pads touch it, the shock could travel along the surface instead of through the patient’s chest to their heart. This not only makes the treatment ineffective but also creates a serious safety risk for you and anyone else touching the patient or the metal. The key is to ensure there’s no conductive pathway linking the patient to the rescuer. Proper safety training covers these environmental factors so you can act confidently in a real emergency.

While it’s perfectly safe to use an AED if someone is lying on snow or ice, metal surfaces require a different approach. Before applying the pads, quickly move the person to a non-conductive surface like grass, pavement, or a wooden floor. Also, be aware of your environment in other ways. Never use an AED near flammable materials or in an area with strong gasoline fumes. The device can create a small spark when it delivers a shock, which could ignite these vapors and cause a fire. Taking a few seconds to assess the scene for these hazards is a critical step in providing safe and effective aid.

What If the Person Has a Hairy Chest?

Too much chest hair can block AED pads from sensing the heart rhythm and giving a proper shock. Hair can interfere with skin contact. This can lower the effectiveness of the conductive gel and make it harder for the pads to work properly.

The American Heart Association suggests some simple ways to manage chest hair. This helps ensure AED pads stick well in an emergency:

1. Shaving the chest where you will place the AED pads helps ensure proper contact. It’s smart to keep a disposable razor with each AED. Most first-aid or responder kits usually include one for this.
2. If no razor is available and the AED keeps saying “check pads,” press firmly on the pads to improve contact. Be sure to let go when the device instructs you to “stand clear.”
3. If the AED isn’t responding, quickly remove the pad to clear some hair. Then, apply a fresh set if you have spares available.

Alternative Pad Options for Better Adhesion

For an AED to properly analyze a heart rhythm and deliver a shock, the electrode pads need solid, direct contact with the skin. Obstacles like excessive chest hair or medication patches can easily get in the way. If you encounter a hairy chest, the best approach is to quickly shave the specific spots where the pads will go. Most AED responder kits come equipped with a prep razor for this exact situation. Similarly, you must remove any medication patches from the chest and wipe the skin clean before applying an AED pad. This simple step prevents the patch from blocking the electrical current and ensures the pad’s adhesive can stick properly, giving the patient the best possible chance of survival.

When you’re helping a child, using the right pads is just as important for proper adhesion and effectiveness. Pediatric pads are smaller to fit a child’s torso without overlapping and are designed to deliver a lower, safer energy dose. If you don’t have them, you can still use adult pads, but the placement is different: one pad goes on the center of the chest, and the other goes on the back between the shoulder blades. This front-and-back placement ensures the pads don’t touch and can make full contact with the skin, which is critical for the AED to work correctly on a smaller body. Taking a moment to prepare the skin and choose the right pad setup can make a life-saving difference.

What to Do About Medication Patches

Transdermal patches release medication through the skin. If placed over the heart during an AED shock, they can block the energy. This may interfere with the shock during cardiac arrest.

Remove any medication patches before using an AED. Then, clean the area to get rid of any leftover adhesive. It’s best to wear gloves when removing it. This helps prevent the medication from absorbing into your skin.

Can You Use an AED on Someone with a Pacemaker or ICD?

When using an AED on someone with a pacemaker or defibrillator, don’t place the pad over the device. It can lower the shock’s effectiveness or even cause damage. Place the pad a bit lower or adjust it from front to back for proper function.

Implanted pacemakers or defibrillators leave a small scar and a firm bump. You can often find these on the upper chest or abdomen, usually on the left side near the heart. In most cases, their placement doesn’t affect the usual positioning of AED pads.

Note: If someone with an implanted defibrillator has sudden cardiac arrest, the device may have failed. Don’t hesitate to use the AED—protecting the person’s life matters far more than the risk of damaging the implant.

Do Jewelry and Piercings Interfere with an AED?

If a cardiac arrest victim has metal jewelry or piercings on their chest that you can’t quickly take off, act fast. Go ahead and use the defibrillator. The priority is timely AED use, even if there’s a slight burn risk. To improve pad contact, move it a bit. This helps avoid direct contact with the metal.

Should You Remove a Bra Before Using an AED?

For the AED to work properly, place the pads directly on bare skin. Don’t put any clothing between the pads and the skin. If the patient is wearing a bra of any kind, someone should remove it or cut it to allow clear access to the chest. For privacy, bystanders can form a barrier while facing away.

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Is It Safe to Use an AED on a Pregnant Woman?

The American Heart Association supports AED use for pregnant patients in cardiac arrest. Pad placement remains the same as with any other adult. Restarting the mother’s heart quickly is crucial for both her and the baby’s survival. The device only delivers a shock when necessary.

How to Place AED Pads on a Larger Person

Using an AED on patients with high body mass or obesity may require extra attention so the device functions as it should. Additional tissue may interfere with pad contact, which can reduce the AED’s ability to accurately detect heart rhythms and deliver a life-saving shock. Awareness of these challenges and proper technique can make a critical difference during an emergency.

1. Firmly press the pads against the patient’s skin so that the conductive gel adheres completely. Proper contact is essential for accurate rhythm detection and effective shock delivery.
2. If the AED has difficulty analyzing the heart rhythm, try placing one pad on the front of the chest and the other on the back between the shoulder blades. This anterior-posterior placement can improve electrical conduction through larger body tissue.

Being mindful of these AED special considerations for larger patients allows faster, more reliable shock delivery and increases the chances of a positive outcome in emergencies.

What to Do After Delivering a Shock

Successfully delivering a shock with an AED is a huge step, but your job isn’t over yet. The moments immediately following the shock are just as critical for the person’s survival. The AED will continue to guide you, but knowing what to expect and what to do next will help you stay calm and effective until professional help arrives. Your actions in this post-shock phase ensure you provide the best possible care while waiting for emergency responders. It’s about maintaining momentum and giving the person the greatest chance of a positive outcome.

Assess the Person and Resume CPR if Needed

After the shock is delivered, the AED will immediately tell you what to do next. In most cases, it will instruct you to resume CPR, starting with chest compressions. Don’t hesitate—place your hands back on the center of the chest and begin pushing hard and fast. The goal is to keep blood circulating to the brain and other vital organs. Even if a shock successfully resets the heart’s rhythm, the heart muscle is often too weak to pump effectively on its own. It needs the support of high-quality CPR to regain strength. Continue following the AED’s prompts until you see obvious signs of life or until emergency responders take over.

Using the Recovery Position

If the person begins breathing normally on their own after the shock, you can stop CPR. This is when you’ll want to place them in the recovery position. To do this, gently roll them onto their side, using their arm and bent leg to keep them stable. This simple maneuver helps keep their airway open and prevents them from choking if they vomit, which can happen after resuscitation. Continue to monitor their breathing closely while you wait for EMS to arrive. The recovery position is a safe and effective way to protect an unconscious but breathing person.

Keep the AED Attached and Turned On

Even after a shock has been delivered and the person shows signs of recovery, do not turn off the AED or remove the electrode pads. Leave everything in place until emergency medical personnel arrive and tell you otherwise. The AED is designed to continuously monitor the person’s heart rhythm. If their heart were to slip back into a dangerous, shockable rhythm, the device will detect it and be ready to advise another shock. Keeping the AED on and attached ensures you are prepared for any changes in the person’s condition, providing a seamless transition of care when help arrives.

Troubleshooting a Malfunctioning AED

Automated External Defibrillators are incredibly reliable, but like any technology, they depend on proper maintenance to function correctly. In the rare event that an AED gives an error message or doesn’t seem to be working, it’s important not to panic. Your immediate actions can still make a life-or-death difference. Knowing how to handle common issues—and when to prioritize CPR over technology—is a key part of being prepared. This is why having a solid AED program management plan is so important for any organization to ensure devices are always ready.

What to Do if an AED is Broken or Missing Parts

If you open an AED and find it has a low battery, is missing its pads, or is displaying an error message, your priority must immediately shift back to CPR. Do not waste precious time trying to fix the device. Your hands are the most important tool you have. Immediately begin or continue high-quality chest compressions while you send someone else to call 911 and search for another nearby AED. If a replacement part, like a new set of pads, is available, you can quickly swap it out. But if a fix isn’t obvious within a few seconds, focus entirely on providing uninterrupted CPR until another AED or professional help arrives.

Special Considerations for Using an AED Effectively

Sometimes, special situations come up when using an AED. You should be prepared. Usually, you can still use the device well with a few small changes to match the situation.

Get your AED ready with essentials. Include pediatric pads, a key, a razor, scissors, and gloves. This way, you will be prepared for any situation. Taking swift and assured action can make the difference—it might save a life.

FAQs

What are some special considerations when using an AED?

Special considerations when using an AED include scenarios involving wet environments, metal surfaces, excessive chest hair, transdermal medication patches, pacemakers, body piercings, and pediatric patients. Each situation may need small changes. This ensures that the shock is delivered in a safe and effective manner.

Can you use an AED on a person with a pacemaker?

Yes, you can use an AED on someone who has a pacemaker or an ICD without risk. Place the pads at a distance from the device. They might block the shock or mess with its delivery. Position the pads a few inches apart. You can also try placing them front and back to avoid issues.

When Should You Not Use an AED?

There are very few true contraindications for AED use. Use an AED when a person shows no response and has abnormal breathing. It will deliver a shock only if it detects a shockable rhythm. This makes it safe, even in uncertain situations. Be careful in places with flammable gases. Also, take care around transdermal patches and water.

What are the special considerations when using an AED on children?

When using an AED on a child under eight, use pediatric pads. If you have them, activate the child mode. This reduces the shock to a level appropriate for a child’s smaller body. Use adult pads if child pads or modes aren’t available. Place them on the chest and back to avoid overlap.

Can you use an AED on a pregnant person?

Yes, you should use an AED during cardiac arrest in a pregnant patient as you would for any adult. Proper placement of the pads is essential. Acting fast is also crucial because restarting the mother’s heart helps to save the baby.

Ready to Respond in an Emergency

Using an AED in an emergency can save lives. But understanding special guidelines helps ensure its safe and effective use. Being with a child, near someone with a pacemaker, or in a wet area? Simple changes can really help. An AED helps you through the process. With some preparation and knowledge, anyone can act with assurance when seconds matter.

Key Takeaways

• Clear the Chest for Solid Pad Contact: Ensure the AED pads can stick directly to the skin by quickly drying the chest, shaving thick hair in the pad area, and removing any medication patches.
• Assess Your Surroundings for a Safe Shock: Before delivering a shock, make sure no one is touching the person and that they are not on a metal surface, which could interfere with the electrical current.
• Act Confidently in Special Situations: Don’t hesitate to use an AED on someone who is pregnant, has a pacemaker, or is a child. It’s always better to adapt pad placement and act quickly than to do nothing at all.

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