What kind of injuries will the explosion cause?

Tianjin Binhai New Area Development Zone Ruihai Dangerous Goods Warehouse at about 11: 30 pm on the 12th, There was a violent explosion, The explosion was ablaze, The smoke and dust were as high as tens of meters. Strong tremors were felt within a radius of several kilometers. Xinhua News Agency reported that As of 8 am on the 13th, Seventeen people have been killed and more than 400 injured. The explosion is a process of huge energy release in a very short period of time. It is said that the power of the explosion is equivalent to 21 tons of trinitrotoluene (TNT). The reason why the explosion can cause such great damage is that there will be a chain reaction when the explosion occurs: 1 kilogram of TNT can release more than 4,000 kilojoules of energy; After the explosion, more than 1,000 litres of gas will be generated. These gases expand rapidly at high temperatures (up to about 3,000 ℃) to form high-pressure air masses. Eventually, a hot and powerful air wave is formed and propagates around at a high speed. The explosion will cause how damage to human body? 1. Debris Wounds Debris after a bomb explodes, As that initial velocity is very high, It will be like a bullet, Injury to people close to the point of explosion. The speed, distance, shape of the debris, Protection of the injured, The location of the hit, Determines the severity of the injury. Under normal circumstances, The closer the person is to the explosion point, The more fragments enter the body. These fragments make debridement and first aid very difficult. If the fragments injure important organs, Or injury to large blood vessels causing massive hemorrhage, The situation will be even more critical. 2. Air impact damage. As mentioned earlier, When an explosion occurs, a strong air shock wave will be generated. A strong impact will shatter bones and even directly tear limbs, causing damage. Similarly, the pressure generated will be relatively greater as the closer to the center of the explosion. Parts without bone support, especially cavity organs, are more vulnerable to impact: ear: tympanic membrane rupture, auditory bone translocation, inner ear damage; Lung: Pulmonary hemorrhage, lung contusion, lung lobule destruction, air thrombus formation; Brain: Brain tissue contusion; Gastrointestinal tract: rupture and hemorrhage of hollow organs. Under great impact, the wounded usually lose consciousness or even lose consciousness. Or secreting a lot of adrenaline due to high tension, On the contrary, it keeps the vital signs of excitement for a short period of time. When medical staff carry out treatment, Particular attention should be paid to the fact that, Even if the casualty looks fine on the outside, But don’t take it lightly, don’t forget to judge the possible injuries inside the body. 3. Burns and chemical reagent damage explosion energy will quickly heat up the air around the explosion point, plus the fire after the explosion, causing burns to personnel. When light burns occur, the skin is generally red, even blisters are generated, and pain is felt. Skin damage caused by severe burns, It could be pink, white or black, The pain may not be strong. Perioral burns, Or the nose hair is burnt, This indicates that burns may affect the respiratory tract. If the injured person is found to have shortness of breath, hoarseness, wheezing or asthma, Special attention should be paid to the occurrence of respiratory tract burns. If the explosion produces toxic gases, Special attention should also be paid to the targeted protection of toxic gases. 4. Trampling and crushing injuries in panic at the moment of explosion, Don’t panic, The first reaction was [get down], Protect your head, In order to minimize the possible damage caused by the explosion impact, At the same time, it can also prevent inhaling too much smoke. After confirming safety, And after observing the line, Stay away from the scene in time. If there is an explosion in the nearby area, Don’t come close to watch, Don’t blindly go to the scene to rescue, Because unprofessional rescue is likely to be [messing up]. Believe in reliable sources, Don’t believe, don’t spread rumors. Remind medical staff, When carrying out rescue, it is necessary to ensure the safety around the rescue site, and do not cause greater damage due to secondary explosion or other unsafe factors. When disasters occur, calm, orderly and professional rescue can help a lot. For ordinary people, not [adding chaos] is the greatest help to rescue personnel. Responsible editor: Ni Jiahua