No urinary catheter is usually required for appendicitis surgery; in the case of male patients with prostate enlargement, a urinary catheter is required. 1. No need to insert a urinary catheter: At present, most appendicitis surgeries are performed laparoscopically, with a short operation time and short anesthesia time, which will not affect the excessive urine residue in the bladder, and therefore no need to insert a urinary catheter. Usually only need to empty the urine before the operation. 2. Need to insert a urinary catheter: generally middle-aged and elderly men, especially patients with prostate hyperplasia, after surgery due to anesthesia is not metabolized completely, urinary function will be weakened. In order to avoid postoperative urinary retention, it is best to give a catheter before the operation, and the catheter can be removed within 24 hours after the operation according to the doctor’s instructions. Therefore, a urinary catheter is usually not necessary for appendicitis surgery, but is required in cases of prostatic hyperplasia.