Final answer:
The most common life-threatening condition associated with a fracture is Compartment syndrome. If left untreated, compartment syndrome can lead to tissue death and permanent damage, requiring emergency medical intervention.
Step-by-step explanation:
The most common life-threatening condition associated with a fracture is Compartment syndrome. Compartment syndrome occurs when increased pressure within a muscle compartment impairs blood flow and tissue function. It can happen as a result of swelling and compression of nerves, blood vessels, and muscle tissue following a fracture.
If left untreated, compartment syndrome can lead to tissue death and permanent damage, requiring emergency medical intervention.