The use of AED is indeed an important first aid skill that needs to be mastered accurately. The following is a more detailed AED usage process:

Turn on the AED and be ready:

Unpack the AED and follow the instructions to turn on the device.

Follow the AED's voice prompts or on-screen instructions.

Recognize patient consciousness and call emergency services:

Check if the patient is unresponsive, not breathing, or only gasping for breath.

If the patient is unresponsive and breathing abnormally, shout for help immediately, call the emergency number, and obtain an AED as soon as possible.

Expose the chest and attach electrode pads:

Unbutton the patient's clothing to ensure that the chest is exposed.

According to the pattern prompts on the AED electrode pads or casing, attach the electrode pads to the correct position on the patient's chest. Usually, one piece is attached below the clavicle of the right chest, and the other piece is attached to the outside of the nipple on the left chest.

AED analyzes heart rhythm:

After attaching the electrode pads, press the "Analyze" button on the AED.

The AED will begin automatically analyzing the patient's heart rhythm. At this time, ensure that no one comes into contact with the patient so as not to interfere with the analysis.

Determine whether defibrillation is needed:

After the AED completes analysis, it will prompt via voice whether defibrillation is needed.

To perform defibrillation:

If the AED recommends defibrillation, make sure no one is touching the patient and press the "Defib" button or wait for the AED to discharge automatically.

During defibrillation, the patient may experience momentary shaking throughout the body.

Perform cardiopulmonary resuscitation (CPR):

After defibrillation, begin CPR immediately. Perform chest compressions and artificial respiration according to standard CPR procedures.

Evaluate again:

After performing CPR for about 2 minutes (i.e. 5 sets), use the AED again to check the heart rhythm.

If the patient still does not regain a normal heart rhythm, repeat the steps of defibrillation and CPR until medical professionals arrive.

During the entire procedure, be sure to remain calm and prompt, and follow the AED's voice prompts or on-screen instructions. AEDs provide non-professionals with an effective tool to rescue cardiac arrest patients in emergencies, but successful first aid still requires timely medical assistance and professional treatment. Therefore, while using an AED, you should call the emergency number as soon as possible and wait for the arrival of professional medical personnel.

Please note that while AEDs are designed to be as easy to use as possible, proper operation and timely medical assistance are critical to saving the patient's life. Therefore, it is very necessary to receive relevant first aid training.