Hannah is not responding to the medication as quick as everyone would hope. There are three things the doctors are looking for:
1. Her Blood Count to stay up
It is decreasing because her body is attacking her blood cells
2. Her blood Pressure to go down
Most likely up because of all the extra fluid in her body
3. Her Kidneys to start working, Her protein levels in her urine to drop
This is the cause for the fluid build up in her body, with low protein in her blood it cannot keep the fluid in it, so the fluid runs out of her blood, and swells up her legs. Also probably the cause for her high blood pressure.

Last time I saw the Doctor these were the things he was concerned about.
Thanks for you prayers!
Daniel