What to wear post surgery ?

I know this seems like a silly question but i am mentally packing my bag for hospital and suddenly got to thinking of what nightwear to pack. I normally wear nighties but because i am having lung surgery, i don't know which would be best. I might not be able to get my arm up to get a nightie on and if i wear pyjamas there are no holes for the drains and possibly other tubes i may have. I will be in ICU for a day or 2 so would i be better with just a hopsital goonie.

Anyone had lung surgery who could advise me ?

Thanks for reading.

PJ