Here creatinine should refer to blood creatinine. Clinically, there is no such statement that creatinine cannot be used for enhanced CT, only that enhanced CT requires the application of contrast agent, which will cause certain damage to the kidneys, therefore, patients with impaired renal function should be cautious when doing enhanced CT, and if necessary, adequate hydration should be given before and after the examination. Enhanced CT requires the use of contrast agents, which need to be excreted by the kidneys, and therefore can cause a certain degree of damage to renal tubular epithelial cells and glomeruli. Since the kidneys have a strong compensatory function, when the blood creatinine is elevated, it means that the kidneys have been severely damaged. If blood creatinine remains in the normal range, kidney damage cannot be excluded. To summarize, regardless of whether the blood creatinine is normal or not, the enhanced CT should be performed under the guidance of the doctor. In patients with kidney injury, performing enhanced CT examination may further aggravate the renal function injury. For patients with elevated creatinine, it is recommended to consult regular hospitals and improve relevant examinations and standardized treatment under the guidance of physicians.