My mother in law had an operation on her neck. While she was in ICU one of the nurses bend her leg at the knee and left it that way.
When we went to visit her we noticed that she had 3 small black dots on her knee. We spoke to the nurse and she said it was nothing. Then she went for rehab at Augustana it was across the street. The rehab person called us he couldn't un-bend her leg.
Eventually, her leg had to be amputated from the sores which grew in number and size, after many complaints to the staff we were told there was no wound care doctor or nurse to care for her. In the end she died from infection.