Effect of Vitamin C on Postoperative Pulmonary Complications After Intracranial: a Randomized, Double-blind, Placebo-controlled Study

Neurosurgery has a high incidence of postoperative pulmonary complications, increasing patient costs and affecting patient prognosis. Neurosurgery often requires hyperventilation to reduce intracranial pressure, so methods to reduce postoperative pulmonary complications such as small tidal volumes cannot be used routinely, and larger tidal volumes often result in injury to pulmonary endothelial cells, which leads to increased permeability of the pulmonary microvasculature, resulting in mechanically ventilated lung injury. Of course surgical injuries and mechanical ventilation can also cause oxidative stress injury to the lungs. Vitamin C is a common antioxidant drug and cofactor in the synthesis of many substances in the body, and many studies have shown that vitamin C prevents the increase in endothelial barrier permeability due to many causes. During the COVID-19 epidemic, vitamin C is seen as an important adjunct in preventing and ameliorating symptoms of COVID-19 patients. not only that, but vitamin C also assisted in postoperative analgesia and promote incision healing, so investigators would like to observe that by giving vitamin C during the surgery is able to prevent the occurrence of postoperative pulmonary complications or improve the prognosis of participants.