Do I need a catheter for laparoscopy?

If the patient is undergoing a relatively small laparoscopic surgery, it is a laparoscopic varicocele high ligation, the operation time is relatively short, usually do not need to observe urine volume, usually do not need to insert ureter. If the patient is undergoing a relatively large laparoscopic surgery, or the patient's condition is more complex, the operation time is relatively long, or the operation involves bladder or urethra operation, usually need to insert a urinary catheter, in order to observe urine volume, ensure urine outflow, prevent urinary retention.