Correct answer:

The features of arterial injury may be those of acute ischaemia, haemorrhage or often both. Acute ischaemia is characterized by: pain (in the limb supplied, starting distally and progressing proximally), pallor, pulselessness, paraesthesiae, paralysis, coldness. Haemorrhage may be overt (bright red blood), or concealed (e.g. closed limb fractures). Symptoms are those of rapidly developing hypovolaemic shock (cold, clamminess, tachycardia, hypotension, loss of consciousness, oliguria progressing to anuria).