ABSTRACT
Green discoloration of the urine after propofol administration is a rare clinical phenomenon. Although the exact incidence of propofol-induced green urine is not known, the reported incidence is thought to be less than 1%. In most reported cases of propofol-induced green urine, the clinical effects were benign and reversible. However, many clinicians are unfamiliar with this rare side effect of propofol. Here, we present the case of a patient who showed green urine following two-staged repair of a thoracoabdominal aortic aneurysm with propofol infusion. His urine had a normal yellowish color after the first operation, but appeared green immediately after the second surgery. Because propofol is a commonly used sedative agent, knowing that green urine can be attributed to propofol administration and that its clinical effect is mostly benign will help clinicians with patient management, as such knowledge will also reduce unnecessary concerns and laboratory tests.