Would someone give me a solid rationale for why one would not empty an NG suction container for an immunocompromised patient? I was told that emptying the container every 4 hours poses a risk of infection to the patient and never to unhook the canister from the tubing until it's full. When it's full, it gets removed from the room and placed in the dirty utility until waste control picks it up. This patient is periodically flushed with 30 mls tap water and when suction is not in use, the canister tubing is left hanging at the bedside and the patient's NG is clamped. Why is tap water and a dangling suction tube ok, and periodic emptying of the container not? I'm inclined to believe that this is just the way it's done on this particular unit with no real understanding of why. In this case, I think it's just preference rather than evidence based practice, but if I'm wrong, please correct me.