This content is discussed by the Joint Center of the First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, please refer to the comments made 1, the mode of anesthesia and complications (anesthesia informed consent form is also attached); ■2, when the intraoperative findings are inconsistent with the preoperative diagnosis, or the lesion invades adjacent organs, blood vessels and other tissues can not be eradicated, or the lesion is extensive has lost the significance of surgery, or there is a patient can not tolerate surgery and other circumstances, there is a change in the surgical style or the use of palliative surgery, the If the patient cannot tolerate the surgery, there is a need to change the operation style or adopt palliative surgery, or even terminate the operation; ■3, there is a risk of stress ulcers, coagulation dysfunction causing hemorrhage, or intraoperative or postoperative damage to blood vessels or dislodgement of ligature wires, etc., resulting in massive bleeding or even life-threatening shock, requiring re-operation to stop bleeding if necessary; ■4, the operation may cause insufficiency or even failure of major organs such as heart, lung, liver, kidney, and brain; ■5, the operation may damage neighboring organs or ■6. postoperative infections such as incisional infections, pulmonary infections, urinary infections, abdominal infections or abdominal abscesses may occur; ■7. incisional anastomoses do not heal and incisional dehiscence may occur, requiring reoperation if necessary; ■8. vascular diseases such as arterial and venous thrombosis may occur, causing heart, brain, lung and other organ function Failure; ■9, bone cement poisoning or embolism caused by life-threatening; ■lO, the installation process of the prosthesis caused by fracture, sometimes need to add other fixation; prosthesis installation angle, axis is not ideal; prosthesis fatigue, stress fracture or re-fracture; prosthesis dislocation, joint wear instability or functional disorders; distant joint prosthesis loose, sinking caused by joint pain, dysfunction; limb unequal length, heterotopic ossification around the prosthesis affect joint function; ■11. damage to pelvic viscera caused by installation of screws; ■12. inoperative drainage tubes requiring re-tubing; ■13. joint stiffness, ankylosis or unsatisfactory results; ■14. other unpredictable accidents and risks; ■15. risks such as disagreement to perform the procedure.