So sorry ur niece is having so many post op issues....
Keep her hydrated with water, and have her rest, rest and rest some more to allow her body to recover......
Look into the Drs....the links above are for members to add their Drs names the complete list is in the Health Pages....but u can see the names on the threads as well it is just more difficult the longer the addons get....
here is a link to the Health Pages -
http://www.medhelp.org/health_pages/list?cid=186