HadaLXTP- How do you know his infection was caused by negligence? Did you see them not using sterile technique placing it? Nosocomial infections aren’t just caused by negligence! All hospitals have nosocomial infections.
Also, why would you go to the hospital to have your cast removed and not the orthopedist? The guy removing it probably never used one of those saws before. They don’t cut like a regular saw back and forth, only oscillate. They can’t cut you, but they can get very hot. If you don’t know how to use it, this heat will penetrate or burn the skin. Unluckly you, it was his first time.