no not quite. there is a rare and often fatal complication. of a long bone fracture called fat embolism that can occur. However immobility after a fracture can and does lead to pneumonia.. this is. it special to a fracture prolonged immobility of any kind can lead to pneumonia
I do recall when I broke my femur...had to do lung tests every four hours for four days until the hospital/doctor was convinced I was not coming down with pneumonia... had the operation the next (fifth) day.