Surgery is one of the surgical methods used to effectively treat a number of diseases. However, this is an invasive intervention, so patients often encounter many complications after surgery, including postoperative bleeding. Postoperative bleeding is a postoperative complication that doctors should not ignore, affecting the health and recovery of patients, so it should be treated immediately when this condition is detected.

Monitoring urine output after surgery is essential as it helps assess potential complications in the patient. When monitoring urine output, it is crucial to pay attention to the amount of fluid intake and output, the total fluid balance over 24 hours, as well as the characteristics, color, and volume of urine.