Catastrophic Haemorrhage Scenario

You are working as a solo responder on the 09-1700 shift. Your day so far has been uneventful with a few routine calls. You’re well into the second half of your shift when your radio goes off. You look at the MDT screen and see a call for a traumatic injury at a building site not too far away. Details aren’t fully clear, but there seems to be an arm injury involved with a lot of bleeding. You respond to the site, where a builder greets you at the entrance. In a full panic, he instructs you to follow the other builders up ahead who are frantically waving.

You pull around a corner by a porta-cabin and see a load of workers frantically running around a man on the floor covered in blood. There is a large excavator nearby with blood on its side and what looks like an arm on the floor.