Preoperative physiologic assessment for patients with respiratory insufficiency        SHEN Ce. The Sixth People Hospital of Shanghai Jiao Tong University, Shanghai 200233, China
Abstract    The physiologic assessment of patients with respiratory insufficiency should be considered for surgery in order to reduce the postoperative pulmonary complications. The examinations help preoperative risk assessment of the patient. They are the 6min walk, chest CT，pulmonary function test, ventilation and perfusion lung scanning，Doppler venous flow detection and cardiopulmonary exercise testing. The best method for preoperative risk assessment is that pulmonologist, cardiologist, anaesthetist and surgeon discuss the surgery risk and prognosis together.