When "Easy" Procedures Go Badly

My best friend from Nashville's mother went into the hospital a couple of weeks ago for a routine OUTPATIENT hernia repair. 17 days later, she died. I am struggling with this whole turn of events. How can something like this happen? Her bowel was knicked during the surgery, and the doctors missed it for a few days. By then, she was septic. Apparently, she lived 15 days after she was so badly infected that her skin turned necrotic (black). Please keep Heather and her family in your thoughts and prayers.