In the Huangshan Mountain Scenic Area, Yungu Cableway, a tourist suddenly fell to the ground with a blue face. Just in the nick of time, staff Wu Genyi quickly kneeling to implement CPR, at the same time, rescue team members carrying a book-sized equipment to the scene. Continued 12 minutes of CPR with the device's three electric shock, the patient was miraculously restored heartbeat and breathing - this is the Huangshan Mountain Scenic Area in the past three years, the sixth case through the device successfully saved lives.

The device that performed the miracle of life was called an automated external defibrillator (AED). It's creeping into every corner of our lives: subway stations, airports, schools, shopping centers... and have you ever noticed it? Do you know how it works in life and death moments?

One,What is an AED?

An AED, or Automated External Defibrillator, is a portable medical device that automatically recognizes fatal heart rhythms and delivers an electric shock to defibrillate them.The core value of an AED is that it can deliver an electric shock to defibrillate ventricular fibrillation in the golden four minutes, restoring the heart to a normal rhythm. Unlike specialized defibrillators in hospitals, the AED is designed for the average person: it operates with voice prompts and graphic instructions, and does not require the ability to judge an electrocardiogram. Like a never-tiring first aid tutor, it is always ready to guide you to save your life in the most critical moments.

Two,How does an AED work? Three Steps to Saving Your Life

Core mnemonics:write out (a prescription, check, invoice etc),subsidize,electronic!

write out (a prescription, check, invoice etc): Turn on the power and open the AED box cover (some models open the cover and turn on the power automatically).

subsidize: Expose the patient's chest, quickly dry the surface of the body, and attach the electrode pads: one under the right clavicle and one under the left lateral chest.

electronic: If prompted with "electric shock recommended": shout "all away!" Make sure no one is in contact and press the flashing click button.

Third, guarding the defense of life, third-party inspection how to ensure that the AED is reliable

When life hangs in the balance, it's critical that an AED can discharge power with precision. Imagine: an AED that has been sitting in a public place for a long time, can it output the required shock energy at the critical moment? Does the battery still have power? Strict testing is the guardian of the "life-saving device". The testing of AEDs by professional organizations covers six key items:

1. Exterior Inspection: Case, screen, and button integrity.

2. Functional verification: Power-on self-test, voice prompt system.

3. Battery Life Test: Standby time vs. burst usage load.

4. Shock energy calibration: Ensure that the output energy is accurate to the joule level (e.g. 360J for adults).

5. Accuracy of rhythm analysis: Recognition of simulated ventricular fibrillation signals.

6. Data logging integrity: Whether records of the resuscitation process are complete.

The testers use defibrillation analyzers - precision instruments with built-in simulated human impedance that measure the voltage/current profile of the AED when it is discharged - to ensure that the error in energy output does not exceed standard requirements. It is these unseen guards that make AEDs never fail to deliver life at critical moments.

IV. Remember the three key perceptions

1. The AED operates fully automatically and can be completed by following voice prompts.

2. Use is protected by law (exemption from liability under article 184 of the General Civil Code)

3. It can be used by anyone without medical qualification.

It is recognized as the "first aid magic weapon" is not a false name: intelligent operation, portable and efficient defibrillation, becoming the most powerful supplement to the existing first aid system. More importantly, it breaks down the barriers of professional first aid - allowing everyone to have the ability to come forward in the moment of life and death.