I can recount very similar experiences as a volunteer mountain rescue squad member. lots of injuries - mostly fractures and sprains, abrasions and gashes. We were most concerned with occult spinal cord complications that happen during falls and trips. We used backboards a lot.

We did deal with one amputation - a bystander rushed up to "assist" putting his shoulder into the spinning rear rotor of the helo, disabling both him and the bird. The arteries clamped and bleeding was minimal.

Just as well. Where do you apply a tourniquet on the shoulder? Direct pressure worked for the situations we encountered. Never applied a TQ in fifteen active years.