AED defibrillator – how to use it step by step? A simple guide for everyone from InPost
17 October 2025
An automated external defibrillator, or AED, is a device that can be used in life-threatening situations when the victim is unconscious and has suffered sudden cardiac arrest. It increases the chances of spontaneous cardiac activity returning, thereby minimising the risk of hypoxia and death. Many people are still afraid to use an AED, even though its use is intuitive. Learn how an AED works and don't be afraid to act in an emergency!
How does an AED defibrillator work and when should it be used?
An AED (Automated External Defibrillator) is a medical device used to save the lives of people who have suffered sudden cardiac arrest. It has been designed so that even people without medical training can use it. An AED defibrillator should only be used in cases of sudden cardiac arrest (SCA). This is a condition in which circulation stops, resulting in blood not reaching cells, tissues and organs. If assistance is not provided immediately, cardiac arrest will result in the death of the victim.
The causes of NZK include:
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myocardial infarction,
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arrhythmia,
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pulmonary embolism.
In the event of cardiac arrest, the first few minutes of action by witnesses to the incident are crucial. Even a slight delay can lead to irreversible changes in the body and death. That is why it is so important to provide first aid efficiently and effectively.
The purpose of an AED defibrillator is to deliver an electrical impulse and restore normal heart muscle function. The device itself the device consists of several components These are:
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polymer casing with an intuitive control panel,
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electrodes connected by cable to the device,
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battery powering the device (battery type depends on the device).
Optionally, the AED may be placed in a protective case designed to allow quick removal of the device.
After switching on the AED defibrillator, the device gives clear and precise voice commands which facilitate providing assistance and help you remain calm in stressful situations. Follow them when providing assistance.
AED defibrillator – how to attach the electrodes correctly?
Electrodes removed from the packaging should be placed on the exposed chest in accordance with the instructions visible on them. If you are unable to do this yourself, ask the emergency number dispatcher for assistance.
AED defibrillator – how to use the device in the event of sudden cardiac arrest?
After attaching the electrodes, the AED will perform a brief analysis of the heart's activity. To do this correctly, it will usually instruct you not to touch the victim. If the AED detects a need for electrical shock treatment, it will inform you with another voice command.
For most devices, this is The person operating the AED initiates treatment by pressing a clearly marked button on the device. In some AED defibrillators, the pulse can be initiated by the device itself after a voice warning to the persons operating it. During defibrillation, no one is allowed to touch the patient.
Safety when using an AED defibrillator
Using an AED defibrillator is simple, but you need to remember a few rules for the device to work effectively :
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Place the electrodes on the bare skin of the victim's chest according to the manufacturer's instructions.
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If necessary, dry your chest. The electrodes may not stick to wet skin, and water may cause the pulse to be transmitted incorrectly.
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Do not attach electrodes to nipples, jewellery, or visible implanted medical devices.
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In the case of excessive chest hair, consider alternative electrode placement (both electrodes are placed on the sides of the patient in the axillary line) or remove the hair with the shaver included in the package.
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Using an AED on children may require additional steps. Look for instructions on the device.
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Ensure that no one touches the victim during defibrillation.
AED defibrillators can mainly be found in public places such as railway stations and shopping centres. InPost, in cooperation with the Rescue Centre, has also started installing them on Paczkomat® parcel machines. The first Helpbox 365 stations have been installed at Paczkomat® parcel lockers in Warsaw and Krakow. Several dozen AED defibrillators have already been installed!
If you wish to To support the citizen rescue initiative, we encourage you to donate InCoins in the InPost app to support the purchase of AED defibrillators. Our goal is to educate the public and promote civic engagement.
AED defibrillator – how to use it step by step? Questions and answers
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Can an AED defibrillator be used on people wearing jewellery?
Yes, the presence of metal components does not contraindicate the use of an AED defibrillator, although local burns may occur. If possible, jewellery should be moved or removed, or the electrodes should be attached so that they do not touch the metal.
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Can an AED defibrillator be used on pregnant women?
Pregnancy is not a contraindication for using an AED defibrillator.
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Can an AED defibrillator be safely used on wet surfaces?
Yes, as long as it is not a layer of water capable of conducting an impulse (such as a shower tray filled with water). Remember to dry the victim's chest. Your safety is a priority.
