The following types of tests are performed prior to fracture surgery: imaging, which is done to discover the exact location of the fracture as well as to make a detailed plan for the surgery. In addition, imaging examinations are performed to find out if there are other underlying diseases and if there are contraindications to surgery. Pre-operative imaging examinations include X-rays of the fracture site and, if necessary, 3D reconstruction CT. An electrocardiogram, ultrasound of the liver, gallbladder, spleen, and both kidneys, and orthopantomogram of the chest are also required. Before fracture surgery, blood tests are also required, including coagulation, routine blood tests, major biochemical series, hepatitis A, B and C series, syphilis and AIDS tests. Relatively special tests are needed depending on the fracture site, such as deep arterial and venous ultrasound of the lower extremities, and even angiography if necessary.