My brother is an attorney that works quite regularly with this same hospital. Actually, he often works against them because he is a PI attorney in Oakland. I asked him about this hospital and he said they are highly respected and he believes they are very good overall.
I asked him about this particular tragedy. And obviously, he does not have the medical records. But it surprised me that he said that sometimes things just 'go wrong' and it is not always anyone's fault. A child can die from an operation in spite of great medical care. That surprised me cuz he is in the business of 'blaming doctors'. But he said ,off the record, that sometimes things just go bad. No one's fault in particular. Her hemorrhaging was perhaps a natural bodily reaction to the surgery. And once that happened, so suddenly, there is not always much that can be done in time to stop it. Tragic.
CHO is one of the most prestigious places in the country - their residency programs are extremely competitive. You'd be quite happy to match there. I have never been there but everyone speaks extremely highly of it.
As for surgeries - normal healthy people most times don't need surgeries, and there doesn't exist a surgery that doesn't have complications. Virtually every time when you take a patients history, you always ask if there is any family history of bleeding, and how much bleeding occurred in past surgeries, etc. That's crucial. Sometimes you can do 100% things by the book, and it's just not enough. It's like cancer - people accept that two people can get the best chemo and the best radiation for the same type of cancer and many times, one person will go into remission while the other person will unfortunately pass away. Surgeries are similar in many respects, though some are extremely safe. But extremely safe doesn't equal 100%.