I spoke to my father this morning and the catscans didn't find any problems or spread of tumors. They drained 1.9 litres of fluid from her lungs, which is pretty impressive. That should make a huge difference in her breathing capacity.
They're doing some x-rays this morning to see if there's any other fluid build up, but assuming theres no surprises, they'll check out of the hospital and head back home later today. Yay!