Minimally invasive surgery for gallstones does not require a urinary catheter. Gallstone surgery is relatively short, basically 1-1.5 hours, which means that the surgery is complete, so there is no need to insert a urinary catheter during the surgery. Before the patient into the operating room need to urinate completely clean, until the end of the operation patients back to the ward, until the anesthesia is fully awake, you need to encourage the patient to urinate, including urination in bed or down to the floor to urinate can be. If the patient has very severe inflammation of the gallbladder, or gallbladder pain for a long time, or atrophic cholecystitis, consider that the operation time may be on the long side, it is necessary to insert a urinary catheter.