NG Care - Spigotting/Free Drainage?

[mellowish]

Hi!

I don't have much experience of looking after patient's with NG/NJ tubes, but sometimes they're either on free drainage or spigotted. Free drainage, is from what I've gathered usually if the patient has been complaining of a lot of nausea & vomiting. What about spigotted? I've seen it spigotted, when they've given medication via the NG for absorption but what other reasons are there for it to be spigotted? Is it in relation to the bowels working?

Thank you :)!