Do you have to do netilat yadayim for a brief waking?

Question

If a person wakes up in the middle of the night to perform a small, brief action (say putting a pacifier back into a baby's mouth) is she required to do netilat yadayim (washing her hands ritually)?

Answer 1

I heard once from Rav Willig (senior, of YU) that you do not have to wash netilas yadayim unless you've completed your nights sleep. Don't recall the mekor.