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First aid at critical moments

  Nitroglycerin   is effective only for patients with angina pectoris and heart failure, but not for acute myocardial infarction.
  If it is considered angina pectoris, take a piece of nitroglycerin under the tongue for the first time, which usually takes effect in 1-3 minutes, and the effect can be maintained for 10-15 minutes. If necessary, it can be repeated several times, but do not make the blood pressure lower than the safe range. If the symptoms are not relieved, it may not be angina pectoris, but acute myocardial infarction, and it should also be considered whether it is a disease other than coronary heart disease, which is manifested by chest pain.
  Take your blood pressure before taking nitroglycerin. If it is an acute myocardial infarction, the patient’s blood pressure will often drop, and even shock symptoms will appear. At this time, the use of nitroglycerin will further reduce the blood pressure, which may be life-threatening at any time. After taking the drug, if the patient feels dizzy, flustered, or pale, the blood pressure should be measured immediately. If the blood pressure is low, the drug should be stopped immediately and the patient should lie down.
  It should also be noted that nitroglycerin is taken under the tongue, not with water. Because only sublingually, it can be quickly absorbed and effective. In addition, nitroglycerin must be stored away from light. At the same time, it also has an expiration date. Replace it with a new one before it expires. Don’t wait for it to be used in an emergency. It will be troublesome when it is expired and invalid!
  Some heart patients may also use another drug, Suxiao Jiuxin Pill. Here I suggest that the preferred nitroglycerin.
  If you consider acute myocardial infarction, you must call the emergency number 120 at the first time, and do not go to the hospital by yourself to avoid danger.
  AED is equivalent to a point-and-shoot camera in a camera.
  AED is also called an automatic external defibrillator. When cardiac arrest occurs, although chest compression can provide temporary blood supply to vital organs, it cannot change the fibrillation of the ventricle. The only effective way to correct ventricular fibrillation is to defibrillate. It is understood that by the end of 2022, the subway stations in Beijing will achieve full AED coverage.
  AED is equivalent to a point-and-shoot camera in a camera. The operation is very simple, as long as you follow the voice prompts of the AED machine, you can do it. It also automatically analyzes the heart rhythm, and if it finds that the heart is working properly, it won’t discharge at all, so you don’t have to worry about getting electrocuted.
  The specific operation is as follows: The first step is to start up. Follow the voice prompts. The second step is to paste the electrodes. According to the voice prompts and pictures, stick the electrode pads between the right clavicle and the nipple, and on the lower left side of the left nipple, respectively. In the third step, the AED automatically analyzes the heart rhythm. If defibrillation is required, the AED recharges automatically. The fourth step is defibrillation. Then follow the voice prompt to press the “discharge button” to defibrillate.
  Pinching the human body is only painful and has no therapeutic value
  . The human middle is located at the junction of the upper 1/3 and the lower 2/3 of the nasolabial fold, which is called the key point for first aid fainting. Pinching Renzhong is a strong pain stimulus. For patients with simple syncope, they will wake up regardless of whether they are pinched or not. For heatstroke patients, the top priority is to get out of the heatstroke environment as soon as possible and take appropriate measures to make the body temperature close to normal. When patients with cerebral hemorrhage or brain tissue compressed by a hematoma are in a coma, no matter how much you pinch them, they will not wake up, and medical intervention is needed to solve the problem. Therefore, pinching only plays a role in pain stimulation, and has no therapeutic value for patients.
  In fact, once the pinching is done incorrectly, it is likely to cause fatal injuries. For example, pressing down with the hand holding the chin while pinching a person is very likely to cause the patient’s tongue to block the airway and cause suffocation. When the patient is in a coma, it may be accompanied by vomit, and the airway is closed due to incorrect compression, which may cause the patient to die from asphyxia and hypoxia. For elderly people with loose teeth or dentures, the method of pinching can also cause teeth to fall out, fall into the airway and cause suffocation.
  It should be emphasized that if a patient is in cardiac arrest, CPR must be performed against the clock. If the focus is only on pinching people, it will delay the rescue opportunity.

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