title: Patients with low brain blood oxygen levels after surgery have longer stays.
mesh_terms: D001921:Brain / Q000098:blood supply*; D003072:Cognition Disorders / Q000209:etiology; D006801:Humans; D000860:Hypoxia / Q000150:complications / Q000517:prevention & control*; D007902:Length of Stay; D010092:Oximetry; D010100:Oxygen; D011183:Postoperative Complications / Q000517:prevention & control*; D013514:Surgical Procedures, Operative
chemical_list: D010100:Oxygen