Closed fracture is the bone fracture that broken part isn't tied to the injury of his or her body directly.
They are also called SIMPLE FRACTURE or OCCULT FRACTURE.

In this case, splint an arm quickly and fix bones.
You can make a splint from anything that can fix broken parts, so when you must make and splint someone's arm, it's good to make good use of close things as much as possible.
For example, in light photo, splint is made from a magazine and towel.

If you do these, it keeps the wounded part from being worse.
So before carry him or her to the hospital, you have to fix hardly.

Opened fracture is the bone fracture that broken part is tied to the injury of his or her body directly.

If a affected part is smudged with sand or trash, wash it, give direct pressure, bandage his or her affected part with a clean piece of cloth, splint and fix.