I'm very confused and feel kind of dumb. : / First-this is an assignment, but I don't want anyone to give me the answers. I just need help understanding so I can figure this all out. I have to do a case study as a make up assignment. The case study is over a elderly pt with pneumonia. It gives the orders and one of them is D5 1/2NS at 125ml/hr. The question is asking if that is appropriate for the pt and it wants a rationale. The problem is I have no idea what D5 1/2NS is or what it does. I've been trying to research it this morning and I feel like the more I read the more confused I'm making my self. Could someone please help me understand what this is. I'm sorry if this is a dumb question, I'm in my 2nd quarter and we haven't gone over IV fluids yet. Thanks.