A urinary catheter is a flexible tube used to drain urine from the bladder. It is often used for patients who have difficulty urinating due to medical conditions, surgeries, or injuries. The catheter is inserted through the urethra and can be left in place for a short or long period, depending on the patient's needs. There are different types of urinary catheters, including intermittent catheters, which are used temporarily, and indwelling catheters, which remain in place for longer durations. Proper care and hygiene are essential to prevent infections and ensure the catheter functions effectively.