I had to chuckle to myself when I talked to W today -- she told me she would be there to pick me up after the procedure and only if it proved necessary. She said she had talked to some of her co-workers (I can guess which one) who told her that the endoscopy staff will keep me at the facility until I am safe to drive myself. If that is not the case, then I could have her called.
So she's fully reneging on driving me to the location and partially reneging on taking me back to my apartment afterward. Whatever. Par for the course. But I'm not letting it bother me.