the way to 'figger' is to ask how she 'visualizes' things when she's NOT in that situation. If she's in a room and someones tells her there's a cat on the table in front of the window, what does she see in her mind's eye? There would need to be a very careful Q&A sessions about how the OOB experience differed from the usual.

I can imagine (postulate, theorize) that she 'heard' voices, and that her mind added the conversations of doctors to her already existing knowlege of where she was (a hospital) and her mind, like a dream sequence, created a little scenario about the situation.
I can postulate this because I know the mind CAN create stories of startling complexity, and careful hypnosis can do even more. I simply find this easier to believe than to create layers realms of 'being' that only a few of us get to experience and that none of us can locate or measure. ...and, you know,*grin* it is purty sneaky to have as your last line of defense, "Oh, those realms are by definition not measurable materially, so I don't need to justify or prove anything."... sneaky, but clever, says I!

(I have had 'flying' dreams where I looked down on not only places I had been, but also places that never were. (Like a steep ocean beach, with waves & tides...and me, soaring around over it). How was I able to do that?)