DayZ field wiki · Medical
Saline
The safer fill
Short answer
When you don't know the type, saline. It is not a blood bag. It is not nothing.
Also: iv · saline bag
How it works
Saline helps volume. It does not fix a matching-type problem you already created.
What to do
Use it when they're pale and you don't have a typed bag.
Don't
Don't invent millilitres.