What is AED?

  Everyone should remember the Wuxi International Marathon in 2015. In the international marathon at that time, more than 30,000 participants experienced thrilling 10 minutes together-at 9:17 Beijing time and 20.3 kilometers from the half marathon, a runner suddenly Falling to the ground, the first rescuer arrived at the scene 1 minute later, confirmed that the contestant had no breathing or other reactions, and immediately performed cardiopulmonary resuscitation (CPR); the second rescuer arrived at 9:19 and replaced the first rescuer The personnel performed CPR; at 9:20, the paramedics arrived at the scene with the AED to perform electrical defibrillation for the players, and the patient resumed breathing spontaneously after 1 minute. Then the ambulance arrived and the players were dissuaded by the police from entering the ambulance and taken to the hospital.
  You must be curious, what is the AED that plays an important role in the emergency process? How should AED be used? Let me give you a detailed introduction.
  To know what AED is, you need to understand what a cardiac arrest is. Cardiac arrest is a death caused by the sudden stop of cardiac function and the disappearance of the beating sound of the patient’s large arteries, resulting in ischemia and hypoxia in various vital organs in the body. Medically, this kind of death is called sudden death. An average of 550,000 cases occur every year in my country, of which nearly 90% occur in public areas outside the hospital. For patients with cardiac arrest, 4 minutes is the prime time to save lives. Data show that 85% to 90% of patients with cardiac arrest are ventricular fibrillation in the early stage. The most effective way to treat ventricular fibrillation is to use an automatic external defibrillator (AED) to defibrillate early. For every minute of defibrillation delay, the survival rate decreases by 7% to 10%. The early effective use of cardiopulmonary resuscitation and AED is the most effective means to rescue the sudden death of cardiac and respiratory arrest.
  AED is mainly used for sudden patients who fall into a coma and sudden cardiac arrest. If the patient is found to be unable to feel the fluctuation of the large arteries, the sound of the heartbeat disappears, and then loss of consciousness, respiratory arrest, and dilated pupils, AED equipment can be used. This is because when such patients are in arrhythmia, although the myocardium is still active, they are unable to transport blood to the whole body and need to be corrected by electric shock. Compared with traditional defibrillation instruments, the biggest feature of AED is that it does not require users to have a high level of interpreting ECG. As long as the power is turned on according to the voice instructions, and the discharge button is pressed, the automatic ECG analysis and defibrillation can be completed. Generally, non-medical personnel can fully master it after undergoing a 4-hour study and drill. Now in a sense, AED is not only a kind of first aid equipment, but also a new concept of first aid, a concept of first effective first aid carried out by on-site witnesses.
  In 2003, the United States began to implement AED rescue measures in public places. It was not until 2006 that my country had the first AED machine. At present, many large cities have AEDs in public places such as subways, train stations, fitness centers, and shopping malls. To save more lives. However, the public’s awareness of AED is still low, and the level of first aid knowledge and skills is not high. Many people do not know how to use it or dare not use it. This has caused the “life-saving artifact” to be reduced to a kind of expensive furnishings. The role of life-saving.
  So, how exactly are AED instruments used? It can be divided into 4 steps-
  Step 1: Take out the AED, quickly bring it to the patient, and press the power button on the machine. Untie the patient’s clothing and fully expose the front chest.
  Step 2: Stick the pre-connected electrode pads on the machine to the rescued person according to the voice instructions. One electrode pad is placed under the patient’s right shoulder clavicle, and the other is placed under the heart.
  Step 3: After connecting the electrodes, the machine will automatically prompt: “Analyzing”, if a shockable heart rhythm is detected, the AED will automatically charge to the preset energy value according to the current patient type. While charging, the heart rhythm analysis continues. During the charging process, the system emits a charging prompt sound. After charging is complete, the shock button on the front panel of the device starts to flash. Voice prompt: “Please stay away from the patient”, then press the discharge button. It should be noted that at this time, the people around the patient must be evacuated. At the same time, all removable metal objects should be removed from the patient’s chest to ensure that there is no foreign body on the chest.
  Step 4: After the discharge is completed, perform CPR according to the rhythm of the voice prompt, and follow the instructions of the machine until the professional arrives. If the patient does not recover after the first defibrillation, the machine will automatically upgrade the shock energy, start the second and third defibrillation, and repeat the above process.

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