Hi,
I am so sorry about your Mom, that is so tough to loose your Mom and then to have questions. Your best bet would be to contact the hospital and have them get you in touch with the doc that attended your Mom and wrote orders for her. No one can answer them exactly but that doc, does someone in your family have power of attorny over her?? they would be the one to ask the doc the questions. You and your family have the right to be told these things. Good luck and again sorry for your loss
Ruth