A crush injury is defined as compression of an extremity or other part of the body that causes muscle swelling and/or neurological disorders in the affected body part. Typical body parts involved include the lower extremities (74%), upper extremities (10%), and trunk (9%). Crush injuries are often seen when hands and feet are violently crushed by blunt objects such as bricks, stones, windows, doors, machines or vehicles; they can also be seen in crush injuries from blast impacts, which often injure internal organs, causing stomach hemorrhage, lung and liver and spleen rupture. More serious crush injuries are earth, stone burial injuries, this injury, often causing a series of pathological changes in the body, and even cause kidney failure, known as “crush syndrome”. According to the different parts of the crush injury and the degree of severity, the treatment method is also different. Crush injury performance of the injured part of the surface without obvious wounds, there may be bruising, edema, cyanosis, such as limb injuries, swelling of the injury can gradually increase; urine, panic, nausea, and even confusion; crush injuries and internal organs can cause bleeding from the stomach, liver and spleen rupture bleeding, then there can be vomiting, hemoptysis, and even shock. First aid treatment 1, as soon as possible to lift the extrusion factors. 2, hand and toe crush injury, finger (toe) nail hematoma is black, can immediately cold compress with cold water to reduce bleeding and reduce pain. 3, suspected of having internal organ damage, should be closely observed for shock aura, and call the ambulance emergency. 4.The extrusion syndrome is gradually formed after the limb is buried, so it should be closely observed and sent to the hospital in time, do not ignore the severity because there is no wound at the time of injury. 5.During the transfer process, the limb activity should be reduced, regardless of whether there is a fracture should be fixed with a splint, and let the limb be exposed to the circulating air, do not massage and hot compress. Precautions 1.Relieve the factors of extrusion as soon as possible. 2.Suspected to have internal organ damage, should closely observe for shock aura, and call ambulance for emergency. During the transfer process, the limb activity should be reduced, regardless of whether there is a fracture should be fixed with a splint, and let the limb exposed to the circulating air, do not massage and compress. Detailed treatment method introduction 1, finger and toe crush injury, visible finger (toe) nail under the hematoma, black purple; can also be open injury, and even have finger bone fracture. The injured person should immediately use cold water or ice cold compress its injured parts to reduce bleeding and reduce pain; later available hot compress to promote the absorption of blood stasis. The blood should be discharged promptly, which not only can stop the pain, but also can reduce the infection to preserve the nail. Specific method: use a paperclip, wrench one end straight as a needle, and then wrap the other end of its return part with several loops of tape for hand-holding, and then heat the needle end on the flame of an alcohol lamp while disinfecting the injured nail with alcohol, leave the fire after the needle burns red, wait for the moment when the red flame of the needle disappears, press the needle vertically on the nail with blood accumulation, apply slight pressure to the nail shell of the pass, and then withdraw immediately, and then squeeze out the hole from the The blood accumulated under the nail. If the scope of accumulated blood is large, several more holes can be used as appropriate to facilitate the extrusion of accumulated blood. After squeezing out the accumulated blood, use net gauze dipped in disinfectant solution (furacilin, Revanor) wet compress, if the bleeding does not stop, 1:1000 epinephrine solution can be used to drip from the hole to help stop the bleeding. If the finger (toe) nail is detached, keep the nail bed clean and dry to prevent infection. If there is a finger bone fracture, you should go to the hospital as soon as possible. 2, the wounded and internal organs, should be closely observed for respiratory distress, pulse fine speed, blood pressure drop and other changes in the situation, promptly sent to the hospital to rescue. Limb crush injury swelling serious, to perform timely incision decompression to ensure blood circulation of the limb to prevent limb necrosis. 3, serious crush injuries occur in patients with crush syndrome, mainly manifested as clinical symptoms of renal failure, the consequences are much more serious than the general crush injuries, so the only way to such a casualty is to quickly, smoothly and safely to the hospital rescue. 4, some extrusion injuries will be fingers, toes cut off (such as hand-holding doors, windows or car door frame, due to doors, windows, etc. were violently closed, and fingers were cut off), in the emergency rescue, hemostatic bandage at the same time, should be broken down fingers, toes with clean cloth wrapped (such as ice bottles, ice cubes to cool the best), together with the injured quickly sent to the hospital for treatment with broken fingers (toes) replantation surgery, do not discard the bloody fingers, toes Do not throw away the broken body of the finger or toe, and do not wash the broken body with water or soak it in any disinfectant solution.