Pulmonary function evaluation and risk factors in patients accompanied with respiratory insufficiency               WANG Jian-dong, QUAN Zhi-wei. Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092，China
Corresponding author: QUAN Zhi-wei, E-mail: zhiwquan@yahoo.com.cn
Abstract    The incidence of postoperative pulmonary complications is still high in patients accompanied with respiratory insufficiency, which is one of the important influence factors on prognosis. A correct objective evaluation of pulmonary function should be given to patients accompanied with respiratory insufficiency, combined with adequately estimating the risk of operation, designing reasonable surgery scheme, drawing up perioperative therapy. The respiratory function should be improved as far as possible to enhance the surgical and anesthetic tolerance of the patients. Recent evaluation of pulmonary function includes respiratory function examination and cardiopulmonary functional reserve examination. Understanding risk factors in patients accompanied with respiratory insufficiency can help to diagnose high risk patients with postoperative pulmonary complications. Correct examination and treatment should be chosen to reduce the pulmonary complications.