There is generally much extravasation of blood locally.
"On Snake-Poison: its Action and its Antidote"
A. Mueller
The popliteal artery, however, is liable to be compressed or torn across in fractures of the lower end of the femur; extravasation of blood from the ruptured artery and gangrene of the limb may result.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
The extravasation in the axilla is usually greater than that accompanying a simple dislocation, and the pain and shock are more severe.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson