A patient, aged 32, diagnosed with multiple injuries: closed craniocerebral injury, closed chest injury, closed right hip fracture. BP - 100/60 mm Hg, Рs - 124/min, RR - 28/min. 2 hours after skeletal extension under local anaesthesia with lidocaine, there appeared abrupt aggravation of the patients condition: developed face and neck cyanosis, BP - 60/40 mm Hg, HR - 160/min, RR - 44/min. What complication most probably aggravated the severity of multiple injuries?