Having actually survived placenta accreta and had an emergency hysterectomy with 7 litre blood transfusion to save my life I can sympathise with this poor woman.
I am scientifically educated and read extensively into the risks before my elcs. It was still horrific and traumatic. I had ptsd and pnd afterwards.
Even with the explanation of the risks of further c sections from the doctors and the risks of an elcs with placenta accreta she may not have fully grasped the seriousness of the situation. The fact that she says she was excited says to me that she didn't realise fully the risks. I was terrified and made plans with DH of what would happen if I died before my elcs. There is no way she could have known she would wake up an amputee, it must have been awful for her.
After my cs I was in HDU unventilated for 5 days. I had special pneumatic leg compression devices on to reduce the chance of DVT. I had a nurse looking after me and 1 other patient in the room at all times. I had continuous, then half hourly, then hourly observations. Clexane injections to reduce clotting. Different hospital mind, but I find it hard to believe that nobody did observations on this lady whilst ventilated in ITU. I have been to an ITU, the patients have 1:1 care and are constantly under observation especially when ventilated. If this wasn't done then rightly the hospital is at fault. The investigation will be able to ascertain what happened from the notes. If there was an error or lapse in her care then she should be duly compensated.
I hope regardless of the outcome that she will receive lots of support.