A urinary catheter is a hollow flexible tube that is used to drain urine directly from the bladder in people that are unable to empty it normally. It may be inserted through the urethra or, in some cases, through a small opening in the lower abdomen, depending on the type of catheter and the person’s needs. Some catheters are used temporarily to empty the bladder and are then removed, while others remain in place and drain urine into a collection bag. Catheters are commonly used to help manage urinary retention, support recovery after surgery, or assist with ongoing bladder management. Common types of catheters include intermittent, indwelling and external catheters.