If a triangle is available, that is the best solution. Otherwise, use anything you can find to comfortably (for the patient) immobilize the injured arm.
sling
Sling
sling
sling
sling
A sling is used to keep the injured arm against the chest.
A sling is used to keep the injured arm against the chest.
A sling is used to keep the injured arm against the chest.
A sling is used to keep the injured arm against the chest.
A sling is used to keep the injured arm against the chest.
A sling is used to keep the injured arm against the chest.
A sling is used to keep the injured arm against the chest.
A sling is used to keep the injured arm against the chest.