11 year old daughter suffocated, was dead and was resuscitated now in a state of reduced concsciousness

I am a father of a now 13 year old daughter. She was born with the genetic disorder Achondroplasie (Dwarfism, "small people"). At the age of 11 we decided that she should undergo leg-extension surgery. Everything went OK, she woke up after the OP and talked with us, was happy to see her feet beeing longer, was happy to get back home. 2 hours later, while back in the patient room, she was unattended and suffocated. My wife found her, started resuscitation and called the emergency team who then took over. They brought her back. At least some of her. Today, 2 years after this horrible incident, she is now in a state of reduced consciousness. She has her eyes open, can groan and moan, feels it when you tickle her toes, even laughs when you tell a funny story e.g. about her cats (she had 4 and loved them). She can not talk though, chew or drink or use her body parts (like moving any part of it on intention). She is lying in a bed 24/7 listening to audio CDs with books for children. If the audio runs out, she starts crying and moaning. My wife, my son and I myself are devastated. She was such an active, life-loving kid, although she had this genetic disorder, she was best in her class and wrote essays and made drawings you would not expect from an 11 year old girl. And now she is forced onto the wheelchair, damned to stay the rest of her life in bed or this chair. So my question is this: what would Buddhism say that happened to my daughter? What is she today? Where is she? Is she still my daughter or has reincarnation taken place? What is the purpose of her being damned to this state? Thank you for your answers! Best regards Palerider