The drainage bag must be emptied at least every eight hours even if it is not full. If the bag is small and fills quickly, it should be emptied when the bag is ⅔ full. To empty the bag, put a container under the bottom drain spout of the bag and open the spout to let all of the urine drain out.
When emptying the bag, be careful not to touch the top of the spout to the container into which it is being drained. Also, do not touch the top of the spout with your hands. Once the bag is empty, do not forget to close the drain spout again.