Extrusion syndrome will cause kidney failure, because the rich muscle tissue is damaged and destroyed after the limb is extruded, and a large amount of myoglobin is released and enters into the bloodstream, which will cause the blockage of renal tubules and interfere with the metabolism of the kidney, and in severe cases, renal failure will occur, so it is more important to pay attention to this situation when the limb is severely extruded, especially when the limb is necrotic in prolonged extrusion. Once there is such a serious complication as renal failure, the treatment is more troublesome, and dialysis treatment is needed to actively preserve the kidneys.