Not sure what happened in this case, but I have seen precipitate in an IV line. I was a new RN on a med-surg floor. I think I was giving Dilantin IV push and the line instantly turned a crystal white from the injection port on down. I immediately shut off the IV infusion and ended up re-starting the IV in his other arm.
This is a similar situation. You know how we're supposed to pull back in the syringe when giving an IM injection to check for the rare instance that you've hit a vein? I had that happen to me, coincidently in the same year at the same job. Was giving a post-op patient some Demeral and the syringe instantly turned red! I pulled the needle out without giving the drug and got her another syringe. Pretty freaky!
Cindy