The tube system is by far the most amazing feature of a hospital pharmacy, it amazes me every day.
We are not supposed to tube Chemo IVs, TPNs, Narcotics, and basically anything without a patient label on it. Oh, and no food.
No one seems to follow the rules, especially in the afternoon or nights. We tube random things to ORs all the time, even without paitent labels, that way you don't have to put on scrubs. Narcotics and food both get tubed a lot, but if you take something out of the vault, and tube it to where it needs to go, its under your name, and your screwed if it doesn't get there. I've never done it myself, but people who have worked there a while, including the pharmacists do it. Usually they call the station as the send it and keep them on the phone till they recieve it so that way it is more "secure". Also, don't let the supervisor see you do it.
I don't know why food shows up once and a while. There is no easy way to tell where things come from, so its just like a bonus i guess.
We tube 1 liter bags all the time, and I am amazed at the sucking power, i've never seen our system clog up once.
Also, maybe I am missing something basic, but why do some places not allow the tubing of patients own meds?