In daily life, accidental injuries are difficult to avoid and sometimes unpredictable, if we do not provide timely medical treatment or improper operation, it is likely to cause harm to their own or others’ bodies, so it is very necessary to master some general knowledge of first aid. First, the heartbeat and respiration is completely absent (CPR) after breathing and heartbeat stop, the brain will soon be hypoxic, and half of the brain cells will be damaged within 4 minutes. If CPR is performed for more than 5 minutes, only 1/4 of the people may be saved. When performing CPR, first call the 120 emergency number. For non-medical personnel, simple chest compressions are recommended, with compressions at the midpoint of the midline of the two nipples in the lower middle part of the sternum, compression depth of 5cm, and compression frequency of 100 times until the arrival of medical personnel. Second, gas poisoning When a gas leak is found, the correct approach is to immediately turn off the gas and open the windows for ventilation. Before entering a room overflowing with gas, the rescuer should take a full breath and then cover his mouth and nose with a wet towel or handkerchief to prevent himself from being poisoned. Before the gas is dissipated, do not turn on the lights, ring the electric bell, make phone calls or use lighters or matches to avoid causing an explosion. Then, move the poisoned person to a ventilated place and loosen the collar and trouser belt of the poisoned person. Observe the person’s consciousness, heartbeat and breathing. If there is no heartbeat and respiration, perform artificial respiration and chest compression immediately; if there is still heartbeat and respiration, call the emergency number immediately and send the person to the hospital for hyperbaric oxygen treatment to avoid leaving sequelae. Ankle sprain After ankle sprain, do not continue to walk, and do not rub or turn the injured joint to avoid further aggravation of the injury. Immediately apply cold towel or ice to the affected area to reduce swelling, relieve pain and relieve muscle spasm. 24 hours later, you can change to hot compress. If internal bleeding is suspected, it is best to use an elastic bandage with pressure, but not too tight, so as not to hinder the blood circulation below the bandage site. If a fracture is suspected, it is best to fix the injured ankle joint with a splint or a nearby wooden stick and go to the hospital as soon as possible. Fourth, the accidental administration of rodenticide rodenticide toxic components are different, the clinical manifestations of the accidental administration vary, such as stomach upset, vomiting, diarrhea, convulsions, etc., and serious coma can occur. Drinking water dilution, vomiting and other methods are not effective, sent to the hospital emergency gastric lavage or symptomatic treatment is the best policy. Five, fish bones stuck in the throat fish bones stuck in the throat, you should immediately stop eating, open wide mouth “ah” sound, so that family members with the help of light or flashlight, see where the fish bones, and then clip out with tweezers. If the fish bone is not found, the fish bone may be stuck in the deeper laryngopharynx and should be seen by a hospital. After the fish bone is removed, there will still be a foreign body feeling in the throat for a short period of time, which is due to local mucosal abrasions and should not be minded. Many people like to use the method of swallowing large dry rice balls to deal with fish bones stuck in the throat, the method may be effective for small fish bones, but not for slightly larger fish bones, but sometimes it will be squeezed and stabbed deeper. Some people think that once the fish bone is stuck in the throat, they can swallow a small amount of vinegar several times to make the fish bone dissolve. In fact, vinegar stays in the throat for a very short time, so it is impossible to dissolve the fish bone.