Blood leaving the veins is the clinical manifestation of crush syndrome. Crush syndrome is a series of pathological changes in the body caused after a person is crushed by a stone and earth, especially a muscular limb is crushed for more than one hour (e.g. thigh). Due to damage to the skin and flesh, blood leaving the veins, stasis of blood, stagnation of qi and blood, meridian occlusion, localized pain, swelling of the limb, indentation and hardening of the skin, subcutaneous stasis of blood, and increased skin tension. How to effectively prevent crush syndrome? Extrusion syndrome is an orthopedic emergency and should be rescued in time to achieve early diagnosis, early wounded limb incision and reduction with prevention and control of renal failure. 1, the scene of emergency treatment (1) rescue personnel should quickly enter the scene, and strive to release the pressure of heavy objects early to reduce the chance of the disease. (2) injured limb braking, to reduce the absorption of tissue decomposition toxins and reduce pain, especially for the casualty who can still move to explain the dangers of activity. (3) cool the injured limb with cool water or expose it to cool air. Massage and hot compresses are prohibited to avoid aggravating tissue hypoxia. (4) The injured limb should not be elevated, so as not to lower the local blood pressure and affect blood circulation. (5) injured limb with open wounds and active bleeding should stop bleeding, but avoid the application of pressure bandages and hemostatic compression bands. (6) All pressurized wounded drink alkaline drinks (every 8g of sodium bicarbonate dissolved in 1000-2000ml of water, plus the right amount of sugar and salt), not only can diuretic, but also can alkalize the urine, to avoid the deposition of myoglobin in the renal tubules. If you can not eat, available 5% sodium bicarbonate 150ml intravenous drip. 2, injured limb treatment (1) early incision and reduction to make the tissue pressure within the fascial septum drop, to prevent or reduce the occurrence of extrusion syndrome. Even if the muscle has been necrosis, through the reduction of drainage can also prevent the invasion of harmful substances into the bloodstream, to reduce the symptoms of toxicity of the body. At the same time, the loss of vital tissue can be removed to reduce the chance of infection. Early incision and reduction is indicated for: (1) history of obvious crush injury. (2) There is more than one fascial septal area involved, with high local tension, obvious swelling, blistering and corresponding motor sensory impairment. (3) Positive urine myoglobin test (including positive occult blood in the absence of hematuria). (2) Indications for amputation ①The affected limb has no blood flow or serious blood flow disorder, and is estimated to be non-functional after preservation. (2) Severe symptoms of systemic toxicity, and the patient’s life is endangered if the symptoms are not relieved by treatment such as incision and reduction. ③ injured limb with specific infection, such as gas gangrene, etc. 3.Chinese medicine treatment The extrusion syndrome should be treated with Chinese medicine according to its clinical characteristics, combining disease identification and evidence identification. 4.Other therapies For patients with extrusion syndrome, once there is evidence of renal failure, dialysis therapy should be carried out early. This therapy can significantly reduce the death caused by acute renal failure such as hyperkalemia, etc. It is a very important treatment method. Hemodialysis (i.e., artificial kidney) can be done in hospitals where available. Peritoneal dialysis is simple to perform and also gives good results in most patients. Since the mortality rate of this disease is light and high, prevention is the key. The general preventive measures are: ① post-injury supplementation with lactic acid Ringer’s solution and colloid fluid; ② alkalinization of urine; ③ diuresis; ④ release of renal vascular spasm; ⑤ incision of the fascia to decompress and release exudate and improve circulation.