Sinusitis surgery, routine surgery generally do not need to insert a urinary catheter, if itself has a chronic disease, need to insert a urinary catheter. 1. Do not need to insert a urinary catheter: sinusitis surgery is generally in the state of general anesthesia, through the endoscopic sinus open surgery for treatment, that is, under the nasal endoscopy, intraoperative opening of the diseased sinuses, smooth drainage, remove pus and polyp tissue. After the procedure, a biodegradable nanoabsorbent or tumescent sponge is filled to apply pressure to stop bleeding. If the operation time is short, a urinary catheter is usually not needed. 2. The need to insert a urinary catheter: due to sinusitis surgery is more traumatic, the length of the surgical process is longer, the need to maintain a high flow of the body under the premise of perfusion, the need to insert a urinary catheter, you can observe the patient’s urine volume during surgery, but also in the anesthesia state, to avoid urinary incontinence and other phenomena. Sinusitis surgery need to go to a regular hospital for treatment, whether the need to insert a urinary catheter, the doctor can only determine after examination.