Today George prolapsed again, so we returned her to the vet. At first the vet suggested another prolapse reduction, an X-ray, and a purse string. A purse string is basically a surgical thread stitched around the cloaca to close it up and prevent prolapses -- however these can often restrict bowel movements, and with George so hopelessly constipated we figured a purse string would probably be counter-productive.
So we tried to pursue other treatments. Since the vet was going on the assumption that the constipation was somehow caused by parasites (hence the antibiotics we've been giving George since yesterday), I asked what would happen if George didn't have worms. What if she'd been impacted (unlikely considering we keep her on Bed-a-Beast substrate) and just couldn't defecate? The vet assistant said they didn't do surgery on frogs, but we insisted that she ask the vet (who's a specialist in exotic animal care and surgery). The vet said surgery was definitely an option (and the assistant promptly apologized for her mistake).
The vet suggested we leave George overnight for prolapse reduction, X-ray, possible purse string, and any necessary surgery. We had to make a $200 deposit (just for the procedures -- they didn't charge us for the follow up exam) and said we'd get a call tonight or tomorrow to let us know what happens. We'll see how things go...