If the previous nurse changed the administration time from 1700 to midnight, then she could have at least notified the lab that the dose time was changed to midnight and they needed to draw tough now between 1130pm-12am...she could had at least done that for you since she was responsible to give the dose on her shift.
I definitely see where I fell short in this scenario, being the last line of defense I know I should have followed up.
I'm not sure if this changes anything, but upon review all my papers and the mar, I realized that the vanco was actually scheduled for 1700, with the trough at 1600.
When lab never came, the day nurse passed it to me by calling pharm and changing the time to midnight. But this was not really clear, as I did not realize the full situation....
So I am frustrated with myself in that I mishandled the situation, and just bummed that I did not realize/clarify with each team member that was involved, because I was on the receiving end of each of their actions, while they got to pass it down the line...
I hope this doesn't turn into a write up, although I would understand if it does happen...i will think of it every time i have a trough in the future, as i add it to my collection of mishaps i will hopefully never repeat this mistake!