https://www.selleckchem.com/products/og-l002.html Carbon dioxide (CO2) ejection syndrome is common after artificial pneumoperitoneum, and it often attracts the attention of anesthesiologists because of its rapid changes in vital signs. CO2 ejection syndrome is not uncommon in critically ill patients, and may occur after mechanical ventilation in patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD). There are few relevant reports about CO2 ejection syndrome, and a considerable number of clinicians have little understanding of the pathological changes. A case of AECOPD patient with CO2 ejection syndrome after endotracheal intubation was admitted to the intensive care unit (ICU) of the Affiliated Hospital of Guizhou Medical University. After treatment, such as fluid expansion, vasoactive drugs and ventilator assistance, the patient's condition improved and was transferred out of the ICU. It is expected to provide some references by summarizing the diagnosis and treatment of this case and reviewing relevant literature reports.The scalpel is the most practical tool for surgeons. The traditional scalpel is a blade with a split handle, but the length of the blade cannot be adjusted, and it is easy to scratch medical staff. In order to solve the above problems, a retractable scalpel handle was designed by the medical staffs of department of general surgery, Affiliated Hospital of Yangzhou University (Clinical Teaching Hospital of Dalian Medical University), and obtained the National Utility Model Patent of China (ZL 2019 2 0203154.9). The telescopic scalpel adopted the design of rotary telescopic sleeve and threaded column handle to achieve the purpose of built-in blade. By rotating the handle at one end of the handle, the length of the surgical blade extending out of the sleeve could be adjusted according to the actual needs. The structure of the device is simple and easy to operate. The adjustable blade length could also achieve the purpose o