Where should a catheter drainage bag be positioned?

A catheter drainage bag should be positioned lower than the bladder to facilitate proper drainage and prevent backflow of urine. This positioning helps maintain gravity's effect on urine flow, ensuring that the bag collects urine effectively without allowing it to flow back towards the bladder.

Keeping the bag not directly on the floor is important as it reduces the risk of infection and keeps the bag clean, as the floor can harbor contaminants. An elevated position or placing the bag at the same level as the bladder could lead to complications such as urinary reflux, which can cause infections or inflammation in the urinary tract.

Overall, option B is correct because it emphasizes both the necessity of proper drainage and the importance of preventing potential health risks associated with improper bag positioning.